WO2009130780A1 - Système de haut-parleurs - Google Patents

Système de haut-parleurs Download PDF

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Publication number
WO2009130780A1
WO2009130780A1 PCT/JP2008/057964 JP2008057964W WO2009130780A1 WO 2009130780 A1 WO2009130780 A1 WO 2009130780A1 JP 2008057964 W JP2008057964 W JP 2008057964W WO 2009130780 A1 WO2009130780 A1 WO 2009130780A1
Authority
WO
WIPO (PCT)
Prior art keywords
cabinet
speaker system
speaker
sound emitting
sound
Prior art date
Application number
PCT/JP2008/057964
Other languages
English (en)
Japanese (ja)
Inventor
天平 勝田
弘司 貝和
Original Assignee
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 東北パイオニア株式会社 filed Critical 東北パイオニア株式会社
Priority to JP2010509007A priority Critical patent/JPWO2009130780A1/ja
Priority to PCT/JP2008/057964 priority patent/WO2009130780A1/fr
Publication of WO2009130780A1 publication Critical patent/WO2009130780A1/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
    • H04R1/2846—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
    • H04R1/2849—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  using transducers reproducing the same frequency band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2884—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure
    • H04R1/2888—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

Definitions

  • the present invention relates to a speaker system.
  • a kelton bass reproduction speaker system in which a second cabinet is arranged in a first cabinet and two speaker units are arranged in the second cabinet is known (for example, see Patent Document 1).
  • the cabinet is formed in a rectangular parallelepiped, and in detail, a pair of opposing surfaces are formed in parallel and adjacent surfaces are perpendicular to each other.
  • the surface on which the acoustic port is formed and the opposing surface are formed in parallel. For this reason, a standing wave is generated in the cabinet, and the acoustic characteristics may be deteriorated due to generation of unnecessary vibration, generation of abnormal noise or the like.
  • the speaker system when the speaker system is arranged in the vehicle, it is assumed that it is arranged, for example, in a luggage room (trunk) behind the rear seat.
  • the speaker unit described in Patent Document 1 when the speaker unit described in Patent Document 1 is simply arranged at the position in the vehicle, the sound emitting portion of the acoustic port is blocked by the inner surface of the luggage compartment, the rear portion of the rear seat, the luggage in the luggage compartment, and the like. As a result, sound waves are not easily radiated to the outside, and the acoustic characteristics may deteriorate.
  • the present invention is an example of a problem to deal with such a problem. In other words, it suppresses the generation of standing waves in the cabinet of the speaker system, reduces unnecessary vibrations, radiates high-quality reproduced sound from the sound emission part of the acoustic port, and installs with relatively high efficiency It is an object of the present invention to provide a speaker system that can secure a space.
  • the present invention comprises a configuration according to the following claims.
  • the speaker unit according to the present invention includes at least one speaker unit, a cabinet that supports the speaker unit, and a cylindrical portion provided in the cabinet, and the cabinet includes at least a top surface portion and a bottom surface that face each other. And an opening end portion of the tubular portion is formed as a sound emitting portion on the front portion of the cabinet, and the sound of the sound emitting portion is provided. A lid portion that covers a part of the sound emitting portion is formed at a predetermined interval on the radiation side.
  • FIG. 1A is a front view of a speaker system 1 according to an embodiment of the present invention
  • FIG. 1B is a top view of the speaker system 1 shown in FIG. It is sectional drawing of the speaker system 1 shown to FIG. 1 (B).
  • It is a schematic diagram for demonstrating the speaker system 1 shown in FIG. It is sectional drawing in the other position of the speaker system 1 shown in FIG. 5A is a cross-sectional perspective view of the speaker system 1
  • FIG. 5B is a cross-sectional perspective view from another viewing direction of the speaker system 1.
  • FIG. 6A is a perspective view of the first member 221 of the lid portion (port cover) 22, and FIG.
  • FIG. 6B is a perspective view of the second member 222 of the lid portion (port cover) 22
  • 6C is a perspective view of the joining surface side of the second member 222 shown in FIG. 6B
  • FIG. 6D is an A view of the second member 222 shown in FIG. 6C
  • FIG. 6E is a cross-sectional view taken along line BB of the second member 222 shown in FIG. 6C
  • FIG. 6F is a cross-sectional view taken along line -A.
  • FIG. It is a figure for demonstrating the vehicle-mounted audio system 500 which employ
  • a speaker system includes at least one speaker unit, a cabinet that supports the speaker unit, and a cylindrical portion (acoustic port) provided in the cabinet, and the cabinets are opposed to each other at least.
  • a top surface portion and a bottom surface portion, and a front surface portion formed obliquely with respect to the bottom surface portion, and an opening end portion of a cylindrical portion is formed as a sound emitting portion on the front surface portion of the cabinet, and the sound of the sound emitting portion
  • a lid portion that covers a part of the sound emitting portion is formed at a predetermined interval on the radiation side.
  • an air passage that guides sound waves to the outside is formed between the lid and the front surface of the cabinet.
  • this speaker system When the above speaker system is driven, for example, the so-called Helmholtz resonance occurs due to the stiffness of the air in the cabinet and the equivalent mass of the air in the cylindrical part (acoustic port), thereby performing bass reproduction.
  • this speaker system has a shape in which the front part of the cabinet is formed obliquely with respect to the bottom part, that is, a cross-sectional shape is formed in a trapezoidal shape, and a sound emitting part of a cylindrical part is formed on the front part of the cabinet. Therefore, it is possible to suppress the occurrence of standing waves in the cabinet and reduce unnecessary vibrations.
  • the speaker system since the speaker system has a lid that is shaped to cover a part of the sound emitting part at a predetermined interval on the sound radiation side of the sound emitting part, for example, adjacent to a wall, a luggage, an obstacle, etc. Even when the speaker system is arranged, high-quality sound waves can be radiated from the sound emitting unit without completely closing the sound emitting unit.
  • an air passage that guides sound waves to the outside is formed between the lid and the front surface of the cabinet, and high-quality reproduced sound can be emitted through the air passage.
  • the cabinet system has a trapezoidal cross section
  • the speaker system for example, when used in an in-vehicle speaker, is placed near the back of the rear seat, the inner surface of the luggage compartment, or the luggage in the luggage compartment. Even if it exists, a high-quality reproduction sound can be radiated
  • FIG. 1A is a front view of a speaker system 1 according to an embodiment of the present invention.
  • FIG. 1B is a top view of the speaker system 1 shown in FIG.
  • FIG. 2 is a cross-sectional view of the speaker system 1 shown in FIG. Specifically, FIG. 2 is a cross-sectional view along the height direction passing through the central axis of the speaker unit.
  • FIG. 3 is a schematic diagram for explaining the speaker system 1 shown in FIG. 4 is a cross-sectional view at another position of the speaker system 1 shown in FIG. 5A is a cross-sectional perspective view of the speaker system 1, and FIG. 5B is a cross-sectional perspective view from another viewing direction of the speaker system 1.
  • FIG. 6A is a perspective view of the first member 221 of the lid portion (port cover) 22, and
  • FIG. 6B is a perspective view of the second member 222 of the lid portion (port cover) 22.
  • FIG. 6C is a perspective view of the joining surface side of the second member 222 shown in FIG. 6B.
  • FIG. 6D is a cross-sectional view taken along line AA of the second member 222 shown in FIG. 6C, and FIG.
  • FIG. 6E shows the second member shown in FIG.
  • FIG. 6F is a cross-sectional view taken along line BB of the member 222
  • FIG. 6F is a cross-sectional view taken along line CC of the second member 222 shown in FIG. 6C.
  • FIG. 7 is a diagram for explaining the speaker unit 31 (31A, 31B) and the audio signal processing device 70 of the speaker system 1.
  • the speaker system 1 can be employed in, for example, a bass reproduction speaker system, a so-called subwoofer.
  • the speaker system 1 includes a first cabinet 2 and a second cabinet 3 as shown in the drawings.
  • the first cabinet 2 is also called an external cabinet 2 and the second cabinet 3 is also called an internal cabinet.
  • the first cabinet 2 accommodates a second cabinet 3 therein, and the second cabinet 3 is provided with a speaker unit 31.
  • the second cabinet 3 includes a pair (one set) of speaker units 31A and 31B.
  • the speaker units 31 ⁇ / b> A and 31 ⁇ / b> B are arranged so that the sound radiation directions are opposite to each other, and the phases of vibrations to the second cabinet 3 are opposite to each other, and unnecessary vibrations are compared in the second cabinet 3. Small.
  • the speaker system 1 according to the present embodiment includes an acoustic port 21 as a sound emitting unit 210 in the first cabinet 2.
  • the speaker system 1 radiates reproduced sound from the sound emitting unit 210 when the speaker unit 31 is driven.
  • the speaker system 1 is formed so that the rear part of the diaphragm of the speaker unit 31 of the second cabinet 3 is a sealed space.
  • a so-called Helmholtz resonance occurs due to the stiffness of the air in the first cabinet 2 and the equivalent mass of the air in the acoustic port 21, so that bass reproduction is performed.
  • the acoustic characteristic of the speaker system 1 has a band-pass characteristic that provides a relatively high sound pressure in a predetermined frequency range FL to FH due to the resonance.
  • the opening end of the cylindrical portion is formed as a sound emitting portion on the front surface portion of the first cabinet 2, and a lid portion that covers a part of the sound emitting portion is formed at a predetermined interval on the sound radiation side of the sound emitting portion It is characterized by being.
  • the first cabinet 2 includes a housing 20, an acoustic port (also referred to as a port) 21, and a port cover 22.
  • the acoustic port 21 corresponds to an embodiment of a sound emitting part and a cylindrical part according to the present invention.
  • the port cover 22 corresponds to an embodiment of a lid (reflecting member) according to the present invention.
  • the housing 20 of the first cabinet 2 when viewed from the front side, is formed in a vertically long substantially box shape as shown in FIG. 1A, and when viewed from the upper surface side (top surface side), FIG. B) is formed in a rectangular shape, and the acoustic port 21 is formed such that the axis of the acoustic port 21 is disposed along the longitudinal direction.
  • FIG. A cross-sectional shape along the vertical direction is formed in a trapezoidal shape.
  • the material of the housing 20 for example, a known material such as a resin such as plastic, wood, metal, or alloy can be used.
  • a material having relatively high vibration resistance, rigidity, and the like for example.
  • the housing 20 includes a front surface portion 201, a rear surface portion 202, a bottom surface portion 203, an upper surface portion (top surface portion) 204, side surface portions 205 (205A, 205B), and corner portions 206 to 209.
  • the first cabinet 2 includes at least a top surface portion 204 and a bottom surface portion 203 that face each other, a front surface portion 201 and a rear surface portion 202 that are formed obliquely with respect to the bottom surface portion 203, and a pair of side surface portions 205. (205A, 205B).
  • the front surface portion 201 is formed to be inclined with respect to the bottom surface portion 203 by a specified angle (R1).
  • the rear surface portion 202 is formed to be inclined with respect to the bottom surface portion 203 by a specified angle (R2).
  • the top surface portion 204 is formed substantially parallel to the bottom surface portion 203.
  • the side surface portions 205 (205A, 205B) are formed along a direction (vertical direction) orthogonal to the bottom surface portion 203, and are formed substantially parallel to each other at equal intervals.
  • the first cabinet 2 includes a pair of surfaces (201, 202) of the first cabinet 2 facing the sound emission direction of the pair of speaker units 31 ⁇ / b> A, 31 ⁇ / b> B. Are formed in such a shape that they intersect each other at an intersection (or line of intersection) P2012 located outside the first cabinet 2.
  • the first cabinet 2 has the pair of surfaces (201, 201) such that the pair of surfaces (201, 202) facing the acoustic emission side of the speaker unit 31 arranged in the second cabinet 3 are non-parallel. , 202) at least one surface is inclined.
  • the shape of the 1st cabinet 2 is not restricted to the said form.
  • one of the front surface portion 201 and the rear surface portion 202 is formed along a direction (vertical direction) orthogonal to the bottom surface portion 203, and the other surface is formed on the bottom surface portion 203. It may be formed in an inclined shape.
  • the first cabinet 2 has a pair of surfaces (201, 202) facing the acoustic radiation side of the speaker unit 31 arranged in the second cabinet 3 from the bottom surface 203 side to the acoustic port 21 formation position side.
  • the surface distance is gradually reduced. That is, the first cabinet 2 is formed such that the distance between the pair of surfaces (201, 202) of the first cabinet 2 is shorter on the acoustic port formation position side than on the bottom surface portion 203 side.
  • the distance between the front portion and the rear portion of the cabinet is parallel at a constant distance.
  • the first cabinet 2 is formed in a trapezoidal cross section, so that the front surface portion 201 and the rear surface portion 202 are non-parallel.
  • the front surface portion 201 and the rear surface portion 202 are formed so that the distance between the surfaces on the upper acoustic port forming position side is shorter than the bottom surface portion 203 side. Since it is formed to be inclined, the generation of the standing wave described above can be suppressed, and unnecessary vibration is relatively small. For this reason, the speaker system 1 can obtain relatively high-quality reproduced sound.
  • the angle R1 between the bottom surface portion 203 and the front surface portion 201 may be the same as or different from the angle R2 between the bottom surface portion 203 and the rear surface portion 202.
  • the angles R1 and R2 are formed as acute angles, and the angle R1 is formed smaller than the angle R2, so that a standing wave or the like in the first cabinet 2 is unnecessary. Vibration can be further reduced.
  • the corner 206 between the front surface 201 and the bottom surface 203, the corner 207 between the bottom 203 and the rear surface 202, and the rear surface 202 and the top surface 204.
  • An inclined surface may be provided on at least one or all of the corner 208 between the corners 209 between the top surface portion 204 and the front surface portion 201. Since the 1st cabinet 2 has the said inclined surface part, the unnecessary vibration by the standing wave etc. which arise in the 1st cabinet can be reduced more.
  • the first cabinet 2 has a pair of surfaces (201, 202) of the first cabinet 2, as shown in FIGS. 1 (A), 1 (B), 2 and 3.
  • a pair of surfaces (203, 204) formed in a direction perpendicular to the acoustic radiation direction of the pair of speaker units arranged in the second cabinet (minimum distance), or a pair of surfaces ( 205A, 205B) longer than the distance. That is, in the first cabinet 2 according to the present embodiment, the distance between the pair of surfaces (201, 202) along the acoustic direction SD of the speaker units 31A, 31B of the second cabinet 3 is in a direction orthogonal thereto.
  • the distance between the pair of surfaces (203, 204) along the distance or the distance between the pair of surfaces (205A, 205B) is long.
  • the first cabinet 2 is formed so that the longitudinal direction of the first cabinet 2 is substantially parallel to the acoustic radiation direction of the speaker unit.
  • the acoustic port 21 is disposed in the first cabinet 2 and has a substantially cylindrical shape.
  • the acoustic port 21 has an opening end formed on the acoustic radiation side surface (front surface portion 201) of the first cabinet 2.
  • the sound emitting unit 210 according to the present embodiment has an opening of the acoustic port 21 formed in the front surface part 201 of the first cabinet 2.
  • the acoustic port 21 includes a trumpet-shaped portion 211, a tubular portion 212, and a rear end 213.
  • the cylindrical portion 212 is disposed in the first cabinet 2 and its axis (CL21) is substantially parallel to the center axis (CL3) of the speaker unit 31 (31A, 31B) by a specified distance (LZ2). It is formed as follows.
  • the cylindrical part 212 is formed so that the axis
  • the vibration component by the speaker unit 31 cancels out.
  • generation of unnecessary vibration can be reduced.
  • the acoustic port 21 extends in the longitudinal direction of the first cabinet 2, the first cabinet 2 has a relatively high stability.
  • the acoustic port 21 is formed so that the central axis (CL21) of the cylindrical portion 212 is oblique with respect to a direction orthogonal to the front surface portion 201, specifically, an angle R1 (acute angle). That is, the front surface portion 201 of the first cabinet 2 is formed to have an acute angle with respect to the tubular portion 212 of the acoustic port 21. Since the acoustic port 21 is formed in the shape described above, it is possible to suppress the generation of so-called wind noise during driving.
  • the cylindrical portion 212 of the acoustic port 21 includes a distance (LZ21A) between the central axis (CL21) of the cylindrical portion 212 and the top surface portion 204 of the first cabinet 2, and a central axis ( Specifically, the distance (LZ21B) is formed to be larger than the distance (LZ21A) so that the distance (LZ21B) between the CL21) and the bottom surface portion 203 of the first cabinet 2 is different. That is, the acoustic port 21 (sound emission part 210) is formed in the vicinity of the top surface part 204 of the first cabinet 2.
  • the trumpet-shaped portion 211 is formed on the acoustic radiation side of the tubular portion 212, and the opening end is formed on the front surface portion 201 of the first cabinet 2. Further, the trumpet-shaped portion 211 is formed in a shape in which the opening end portion on the acoustic radiation side is expanded in a trumpet shape, specifically, a shape in which the inner diameter increases from the inside to the opening side.
  • the acoustic port 21 has an axis formed obliquely with respect to a direction orthogonal to the front surface portion 201, and has a trumpet-shaped portion 211 at the opening end portion. Unnecessary sound can be reduced.
  • the trumpet-shaped portion 211 is formed in a shape in which the end portion on the sound radiation side protrudes in the sound radiation direction longer than the upper end portion side 211A of the first cabinet 2 and smoothly expands on the bottom surface side 211B. . That is, the acoustic port 21 is formed in a shape in which the end portion on the sound radiation side is expanded, and the end portion on the sound radiation side is longer than the upper end portion side of the cabinet and extends to the bottom surface portion side. As described above, since the trumpet-shaped portion 211 of the acoustic port 21 is formed in a smoothly expanded shape, for example, a problem that a relatively high flow velocity distribution is locally generated at the port end portion is suppressed. Can do.
  • the rear end 213 is formed on the opposite end to the acoustic radiation side end of the cylindrical portion 212.
  • the rear end 213 is formed in a trumpet-shaped shape, so-called wind cut. Generation of unnecessary sounds such as sounds can be suppressed.
  • the acoustic port 21 has an inner diameter of the port, an axial length, a shape, and the like so that the equivalent mass due to the air inside the port becomes a specified amount and the speaker system 1 generates a predetermined Helmholtz resonance.
  • the acoustic port 21 is not limited to the shape described above.
  • only the cylindrical portion 212 may be formed on the front surface portion 201.
  • the port cover 22 is formed in a shape that covers part of the opening of the acoustic port 21 as shown in FIGS. 1 (A), 1 (B), 2, 4, and 5. Specifically, the port cover 22 is formed at a predetermined interval on the acoustic radiation side of the opening end of the acoustic port 21. The port cover 22 extends at a predetermined interval along the front surface portion 201 of the first cabinet 2. Specifically, the port cover 22 has an upper portion joined to the top surface portion 204 of the first cabinet 2, a lower portion joined to the lower side of the first cabinet 2, or substantially in the vicinity of the central portion, and a lateral end portion, It is not joined to the first cabinet 2. That is, an opening is formed in the horizontal direction between the port cover 22 and the first cabinet 2.
  • an air passage 2201 that guides sound waves from the acoustic port 21 to the outside is formed between the port cover 22 and the front portion of the first cabinet 2.
  • the ventilation path 2201 corresponds to an embodiment of the duct 220. Sound waves from the acoustic port 21 are radiated through the ventilation path 2201 in a direction (horizontal direction) substantially orthogonal to the axial direction of the acoustic port 21 or in an oblique direction.
  • the port cover 22 is provided in front of the acoustic radiation side of the acoustic port 21, the upper and lower portions of the port cover 22 are joined to the first cabinet 2, and the lateral end portion is the first end. Since it is formed in a structure that is not joined to the cabinet 2, for example, foreign matter can be prevented from entering the acoustic port 21 from the front, top, bottom, etc., and high-quality reproduced sound can be emitted in a substantially horizontal direction. it can.
  • the port cover 22 has an end portion (upper end portion) coupled to the front surface portion 201 of the first cabinet 2 and a cross-sectional shape formed in a curved shape. Can radiate efficiently.
  • the width (F22) of the port cover 22 is shorter than the width (F210) of the opening end portion of the trumpet-shaped portion 211 of the acoustic port 21. Therefore, the reproduced sound can be efficiently radiated also to the front side of the acoustic port 21 in the axial direction. For example, even when there is an obstacle such as a luggage or a car wall on the side surface of the first cabinet 2 of the speaker system 1, high-quality sound waves can be emitted from the sound emitting unit 210.
  • the port cover 22 is formed with a protruding portion 2222 that protrudes toward the sound emitting portion 210 of the acoustic port 21.
  • the protruding portion 2222 of the port cover 22 is formed in a smoothly raised shape centering on the position intersecting the axis of the acoustic port 21, and the sound wave emitted from the acoustic port 21 is transmitted to the port cover 22.
  • the air can be efficiently radiated to the outside through the ventilation path 2201 formed by the protrusion 2222 and the acoustic port 21.
  • the protruding portion 2222 can suppress the occurrence of air stagnation between the sound emitting portion 210 and the port cover 22.
  • the port cover 22 includes a first member 221 and a second member 222. Specifically, the port cover 22 has the first member 221 arranged outside, the second member 222 arranged inside (acoustic port side), and the second member 222 attached to the first member 221 with an adhesive or the like. It is joined by. A protrusion 2222 is formed on the second member 222.
  • the second member 222 includes a reinforcing portion 2221 on the joint surface side with the first member 221.
  • the reinforcing portion 2221 includes a protruding portion that protrudes toward the first member 221.
  • the second member 222 includes a reinforcing portion 2221 having a shape protruding in a lattice shape along the longitudinal direction and the direction orthogonal thereto.
  • the shape of the reinforcement part 2221 is not restricted to this form, For example, you may form in arbitrary shapes, such as triangular shape, hexagonal shape.
  • the cross section of the reinforcing portion 2221 may be a polygon such as a quadrangle or a triangle, or a curved shape. Further, as shown in FIGS.
  • the total height of the reinforcing portion 2221 with respect to the second member 222 is substantially the same over the second member 222 or large in a predetermined region. It does not matter if it is small, and it is sufficient that a part of the reinforcing portion 2221 is in contact with the first member 221. In addition, since a part of the reinforcing portion 2221 is in contact with the first member 221, the rigidity of the port cover 22 can be relatively increased. Further, the reinforcing portion 2221 may be protruded in a direction substantially perpendicular to or oblique to the surface of the second member 212 as shown in FIG. 6 (F), and the second member 222 or the port cover 22 may be projected.
  • the rigidity of can be made relatively large.
  • the reinforcing portion 2221 protrudes in an oblique direction with respect to the surface of the second member 222 and in a direction toward the upper end portion of the first member 221. Further, the reinforcing portion 2221 protrudes from the second member 222 so as to face the direction of the air flow generated from the sound emitting portion 210 of the acoustic port 21, thereby making the rigidity of the port cover 22 relatively large. It is possible to prevent unnecessary vibration from occurring in the cover 22.
  • the port cover 22 Even when sound waves are radiated from the sound emitting unit 210 of the acoustic port 21 toward the port cover 22 during driving, the port cover 22 has a double structure in which the first member 221 and the second member 222 are coupled. Therefore, it is lightweight and has a relatively high rigidity, and can suppress the occurrence of unnecessary vibrations. Further, since the second member 222 has a reinforcing portion 2221 formed on the side of the joint surface with the first member 221, the port cover 22 has higher rigidity and further reduces unnecessary vibration. Can do.
  • the first cabinet 2 has a convex portion 23 having a sealed space (airtight space) formed therein in the vicinity of the lower front portion of the front portion 201 and below the port cover 22.
  • the convex portion 23 is formed of, for example, a semi-translucent material, and transmits light generated by light emission of the light emitting element 231 provided on the front surface portion 201, for example, when driving or turning on the power.
  • the light emitting element 231 may be controlled by a control circuit so as to emit light with a light emission intensity corresponding to the amplitude of an audio signal input to the speaker unit 31, for example.
  • the second cabinet 3 is disposed in the first cabinet 2, and the housing 30 is formed in a substantially rectangular parallelepiped.
  • the second cabinet 3 is provided with a plurality of speaker units 31, in this embodiment, a pair of speaker units 31A and 31B.
  • the second cabinet 3 includes a housing 30, speaker units 31 (31 ⁇ / b> A and 31 ⁇ / b> B), an amplifier 32, a substrate 33, a heat radiating fin 34, and a magnetic shielding member (plate-shaped member) 35.
  • the housing 30 according to the present embodiment is formed in a rectangular parallelepiped shape so that the inside becomes a sealed space.
  • a forming material of the housing 30 for example, a known forming material such as a resin such as plastic, wood, metal, or alloy can be used.
  • casing 30 is being fixed to the bottom face part 203 of the 1st cabinet 2, the gravity center of the speaker system 1 becomes comparatively low, and can acquire comparatively high stability.
  • the speaker unit 31 (31A, 31B) is disposed in the second cabinet 3 so that the opposite side (back side) 31BK faces the acoustic radiation side, and the central axis (CL3) is the same axis. It is arranged to be located on the top. That is, the speaker units 31 (31A, 31B) are arranged so that the sound radiation directions (SD) are outward. In addition, the speaker unit 31 is arranged so as to be substantially parallel to the bottom surface portion 203 at a specified interval so that the central axis thereof is substantially parallel to the longitudinal direction of the first cabinet 2.
  • the speaker unit 31 includes a pair (one set) of speaker units 31A and 31B.
  • the speaker units 31A and 31B have substantially the same configuration, and one speaker unit 31 will be described.
  • the speaker unit 31 includes, for example, a magnetic circuit 310, a frame 3101 joined to the magnetic circuit 310, and a vibrating body 314 that is arranged to vibrate on the frame 3101.
  • a magnetic circuit 310 for example, an inner magnet type magnetic circuit, an outer magnet type magnetic circuit, or the like can be adopted.
  • the outer magnet type magnetic circuit 310 according to the present embodiment includes a magnet 312 bonded to the yoke 311 and a plate 313 bonded to the magnet 312. In the magnetic circuit 310, a magnetic gap is formed between the plate 313 and the yoke 311.
  • the vibrating body 314 includes a voice coil bobbin 315, a voice coil 316, a diaphragm 317, a cap 317 ⁇ / b> A, an edge 318, and a damper 319.
  • a voice coil 316 wound around a voice coil bobbin 315 is loosely fitted in the magnetic gap of the magnetic circuit 310 and is arranged so as to freely vibrate.
  • the voice coil bobbin 315 is supported by the frame 3101 through a damper 319 so as to be able to vibrate. Further, the outer end of the frame 3101 is fixed to the second cabinet 3.
  • the voice coil 316 of the speaker unit 31 is electrically connected to the amplifier 32, the external audio signal processing device 70, and the like via the conductive wires 71 and 72, so that the audio A signal is input.
  • the diaphragm 317 is formed in a prescribed shape such as a cone shape, for example, an inner peripheral portion is fixed to the voice coil bobbin 315 with an adhesive or the like, and an outer peripheral portion is supported by the frame 3101 via an edge 318 so as to be able to vibrate.
  • the diaphragm 317 has a cap 317A disposed at the center.
  • the pair of speaker units 31A and 31B arranged in the second cabinet 3 are arranged with their respective magnets magnetized in the opposite directions along the sound radiation direction, and the respective voice coils. Are wound in the same winding direction, and when the same acoustic signal is input to the voice coil, each diaphragm vibrates so as to move in the opposite direction along the speaker central axis.
  • the housing 30 of the second cabinet 3 is provided with an audio signal processing circuit such as an amplifier 32 therein.
  • an audio signal processing circuit such as an amplifier 32 therein.
  • a substrate 33 is provided from the upper center portion of the housing 30 to the vicinity of the inner center portion, and an amplifier 32 is provided on the substrate 33.
  • a heat radiation fin 34 for heat radiation of the amplifier 32 is provided on the housing 30.
  • the heat radiating fins 34 according to the present embodiment are made of a relatively high heat conductive plate-like member, and are arranged in the vicinity of the acoustic port 21.
  • the case 30 is provided with a magnetic-shielding member (plate-like member) 35 on its side surface portion in order to reduce leakage magnetic flux due to the speaker unit 31.
  • the casing 30 is provided with a reinforcing member 304 in the vicinity of the upper portion of the side surface on which the speaker unit 31 is provided.
  • the housing 30 of the second cabinet 3 is formed to be detachable from the first cabinet 2. Specifically, the second cabinet 3 is fixed to the fixing portion 301 of the bottom surface portion 203, and the bottom surface portion 203 is detachably fixed to the first cabinet 2 by an attachment fixing member 303.
  • the housing 30 has a leg portion 302 formed at the lower portion thereof, and the leg portion 302 is fixed to a member to be attached such as a vehicle body.
  • a concave storage portion 301 ⁇ / b> C is formed on the bottom surface portion 203 of the housing 30, and wiring and the like are stored therein.
  • the second cabinet 3 is formed in a rectangular parallelepiped, and the distance between the side portions (LY3) is the length between the side portions 205 (205A, 205B) of the first cabinet 2. (LY2) is formed in a shorter shape.
  • the central axis (CL3) of the second cabinet 3 is formed to be substantially parallel to the central axis (CL2) of the first cabinet 2 and the central axis (CL2) of the acoustic port 21.
  • the length (LX204) along the longitudinal direction of the top surface portion 204 of the first cabinet 2 is shorter than the length (LX2) of the bottom surface portion 203.
  • the first cabinet 2 is formed such that the length (LX21C) along the longitudinal direction in the vicinity of the port mounting portion is shorter than the length (LX2) of the bottom surface portion 203 of the first cabinet 2.
  • the length (LX21) in the axial direction of the acoustic port 21 is shorter than the length (LX204) along the longitudinal direction of the top surface portion 204 of the first cabinet 2.
  • the length (LX3) along the longitudinal direction of the second cabinet 3 is shorter than the length (LX2) along the longitudinal direction of the first cabinet 2.
  • the distance (LZ21A) from the central axis (CL21) of the acoustic port 21 to the top surface portion 204 along the height direction (direction perpendicular to the bottom surface portion 203) is from the central axis (CL21) to the bottom surface. It is shorter than the distance (LZ21B) to the part 203.
  • the distance (LZ4) from the top surface of the second cabinet 3 to the top surface of the first cabinet 2 is the distance (LZ5) from the top surface of the second cabinet 3 to the bottom surface 203 of the first cabinet 2. ) Shorter.
  • the distance (LZ1) from the center line (CL3) of the speaker unit 31 to the bottom surface portion 203 of the first cabinet 2 is shorter than the distance (LZ3) from the center line (CL3) to the top surface portion 204 of the first cabinet 2. .
  • FIG. 8 is a diagram for explaining an in-vehicle audio system 500 that employs the speaker system 1 according to an embodiment of the present invention.
  • the speaker system 1 can be employed in an in-vehicle audio system 500 of a vehicle, for example, as shown in FIG. Specifically, for example, the speaker system 1 is disposed in the rear portion of the seat of the vehicle, in the trunk, and the like, and the bottom surface portion 203 of the first cabinet 2 is fixed to the vehicle. At this time, if the front surface portion 201 of the first cabinet 2 is formed at substantially the same angle as the inclination angle on the back surface side of the seat, for example, the first cabinet 2 can be disposed close to the seat, so it is efficient. Arrangement space can be secured. Even when the speaker system 1 is arranged as described above, high-quality sound waves can be efficiently emitted from the acoustic port 21.
  • the vibration bodies of the speaker units 31A and 31B vibrate and radiate sound waves in the acoustic radiation direction (SD).
  • SD acoustic radiation direction
  • Helmholtz resonance occurs in the first cabinet 2 and the acoustic port 21, and a bass reproduction sound is radiated from the sound emitting unit 210 of the acoustic port 21.
  • vibrations are transmitted to the housing 30 from each of the speaker units 31A and 31B.
  • the respective vibrations cancel each other in the housing 30 itself and inside the housing 30, generation of unnecessary vibrations should be suppressed. Can do.
  • the first cabinet 2 has at least one of the pair of surfaces such that the pair of surfaces (201, 203) facing the sound radiation side of the speaker unit are non-parallel. Since the surfaces (201, 203) are inclined, more specifically, the cross-sectional shape is formed in a trapezoidal shape, it is possible to prevent unnecessary standing waves from being generated, and high-quality sound waves are transmitted to the acoustic port. It can radiate
  • the speaker unit 31 is disposed so that the central axis thereof is substantially parallel to the longitudinal direction of the first cabinet 2, and therefore, generation of unnecessary vibration in the first cabinet 2 is suppressed. be able to.
  • the 2nd cabinet 3 is formed in a rectangular parallelepiped and the 1st cabinet 2 is formed in cross-sectional trapezoid shape, a standing wave generate
  • the port cover 22 having a shape that covers a part of the sound emitting unit 210 at a predetermined interval is formed on the sound radiation side of the sound emitting unit 210 in the first cabinet 2. Therefore, for example, even when the speaker system 1 is disposed adjacent to a wall, a luggage, an obstacle, etc., the sound emitting unit 210 is not completely blocked, and high-quality sound waves are emitted from the sound emitting unit 210. can do.
  • an air passage 2201 that guides sound waves to the outside is formed between the port cover 22 and the front portion 201 of the first cabinet 2, and high-quality sound reproduction is performed through the air passage 2201. Sound can be emitted.
  • a sound wave can be guide
  • the port cover 22 is formed at a predetermined distance from the sound emitting unit 210, and a ventilation path is formed separately on the left and right, and sound waves are emitted through the ventilation path. Therefore, sound can be emitted efficiently without being blocked by the vehicle inner surface disposed in front of the speaker system 1.
  • the rigidity of the port cover 22 becomes relatively large. Unnecessary vibrations can be prevented from occurring.
  • the reinforcing portion 2221 of the second member 222 is inclined with respect to the surface of the second member 222 and toward the upper end of the first member 221, particularly in the sound emitting portion 210 of the acoustic port 21. By projecting along the direction of air flow generated from the port cover 22, the rigidity of the port cover 22 can be made relatively large, and unnecessary vibrations can be prevented from occurring in the port cover 22.
  • the present invention is not limited to the above embodiment.
  • the length, inner diameter, shape, and the like of the acoustic port 21 of the second cabinet 3 are not limited to the above embodiment.
  • the speaker unit 31 is not limited to the above embodiment.

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

La présente invention concerne un système de haut-parleurs qui, d'une part limite les ondes sonores stationnaires se produisant dans une enceinte de façon à atténuer les phénomènes vibratoires indésirables, et d'autre part fait rayonner un son reproduit de haute qualité à partir d'une zone de rayonnement acoustique d'un orifice acoustique. Dans une première enceinte (2) du système de haut-parleurs (1), on a réalisé un couvercle d'orifice (22) présentant une forme permettant de couvrir une partie d'une zone de rayonnement acoustique (210) à des intervalles définis au niveau du côté de rayonnement acoustique de la zone de rayonnement acoustique (210). Il en résulte que, même lorsque le système de haut-parleurs (1) est posé contre un mur, un bagage ou tous autres objets par exemple, il est possible de faire rayonner des ondes sonores de haute qualité à partir de la zone de rayonnement acoustique (210) sans bloquer totalement la zone de rayonnement acoustique (210).
PCT/JP2008/057964 2008-04-24 2008-04-24 Système de haut-parleurs WO2009130780A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2010509007A JPWO2009130780A1 (ja) 2008-04-24 2008-04-24 スピーカシステム
PCT/JP2008/057964 WO2009130780A1 (fr) 2008-04-24 2008-04-24 Système de haut-parleurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/057964 WO2009130780A1 (fr) 2008-04-24 2008-04-24 Système de haut-parleurs

Publications (1)

Publication Number Publication Date
WO2009130780A1 true WO2009130780A1 (fr) 2009-10-29

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Application Number Title Priority Date Filing Date
PCT/JP2008/057964 WO2009130780A1 (fr) 2008-04-24 2008-04-24 Système de haut-parleurs

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JP (1) JPWO2009130780A1 (fr)
WO (1) WO2009130780A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020202858A1 (fr) * 2019-04-02 2020-10-08 フォスター電機株式会社 Dispositif haut-parleur

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS559175U (fr) * 1978-07-03 1980-01-21
JPS6481499A (en) * 1987-09-22 1989-03-27 Seiji Yoshioka Speaker system
JPH0453393U (fr) * 1990-09-13 1992-05-07
JPH05328473A (ja) * 1992-05-27 1993-12-10 Mitsubishi Electric Corp 低音再生用スピーカシステム
JP2004536541A (ja) * 2001-07-23 2004-12-02 ネクソ 直接放射と最適放射の音響性能を持つスピーカ
JP2004343548A (ja) * 2003-05-16 2004-12-02 Sharp Corp バスレフ型スピーカ装置及び該バスレフ型スピーカ装置を内蔵した映像表示装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS559175U (fr) * 1978-07-03 1980-01-21
JPS6481499A (en) * 1987-09-22 1989-03-27 Seiji Yoshioka Speaker system
JPH0453393U (fr) * 1990-09-13 1992-05-07
JPH05328473A (ja) * 1992-05-27 1993-12-10 Mitsubishi Electric Corp 低音再生用スピーカシステム
JP2004536541A (ja) * 2001-07-23 2004-12-02 ネクソ 直接放射と最適放射の音響性能を持つスピーカ
JP2004343548A (ja) * 2003-05-16 2004-12-02 Sharp Corp バスレフ型スピーカ装置及び該バスレフ型スピーカ装置を内蔵した映像表示装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020202858A1 (fr) * 2019-04-02 2020-10-08 フォスター電機株式会社 Dispositif haut-parleur
JP2020170926A (ja) * 2019-04-02 2020-10-15 フォスター電機株式会社 スピーカ装置
JP7034979B2 (ja) 2019-04-02 2022-03-14 フォスター電機株式会社 スピーカ装置
JP2022084678A (ja) * 2019-04-02 2022-06-07 フォスター電機株式会社 スピーカ装置
JP7371320B2 (ja) 2019-04-02 2023-10-31 フォスター電機株式会社 スピーカ装置
US11917388B2 (en) 2019-04-02 2024-02-27 Foster Electric Company, Limited Speaker device

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