WO2010106685A1 - Haut-parleur - Google Patents

Haut-parleur Download PDF

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Publication number
WO2010106685A1
WO2010106685A1 PCT/JP2009/055526 JP2009055526W WO2010106685A1 WO 2010106685 A1 WO2010106685 A1 WO 2010106685A1 JP 2009055526 W JP2009055526 W JP 2009055526W WO 2010106685 A1 WO2010106685 A1 WO 2010106685A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
speaker device
voice coil
vibration direction
vibration
Prior art date
Application number
PCT/JP2009/055526
Other languages
English (en)
Japanese (ja)
Inventor
靖昭 小笠原
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/JP2009/055526 priority Critical patent/WO2010106685A1/fr
Publication of WO2010106685A1 publication Critical patent/WO2010106685A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • 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
    • 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 dynamic speaker device As a general speaker device, a dynamic speaker device is known (see, for example, Patent Document 1). As shown in FIG. 1, for example, the dynamic speaker device is joined to a frame 3J, a cone-shaped diaphragm 21J, an edge 4J that supports the diaphragm 21J on the frame 3J, and an inner peripheral portion of the diaphragm 21J.
  • the voice coil bobbin 610J, the damper 7J that supports the voice coil bobbin 610J on the frame 3J, the voice coil 611J wound around the voice coil bobbin 610J, the yoke 51J, the magnet 52J, and the plate 53J, and the voice coil 611J are arranged. And a magnetic circuit in which a magnetic gap is formed.
  • the voice coil bobbin 610J vibrates due to the Lorentz force generated in the voice coil 611J in the magnetic gap, and the diaphragm 21J is driven by the vibration.
  • the general dynamic speaker device described above has a voice coil 611J disposed on the side opposite to the acoustic radiation side of the diaphragm 21J, and vibration directions of the voice coil 611J and the voice coil bobbin 610J. And the vibration direction of the diaphragm 21J is the same.
  • the region for vibrating the diaphragm 21J, the region for vibrating the voice coil bobbin 610J, the region where the magnetic circuit is disposed, and the like are in the vibration direction (acoustic radiation direction) of the diaphragm 21J. Therefore, the overall height of the speaker device must be relatively large.
  • the size of the diaphragm 21J of the speaker device along the vibration direction is the same as the size of the cone-shaped diaphragm 21J along the vibration direction and the diaphragm 21J is supported by the frame 3J.
  • the height of the edge 4J (a), the voice coil bobbin height (b) from the junction of the diaphragm 21J and the voice coil bobbin 610J to the upper end of the voice coil 611J, the voice coil height (c), and the main magnet of the magnetic circuit It consists of the height (d) and the thickness (e) of the yoke 51J mainly of the magnetic circuit.
  • the vibration direction of the voice coil bobbin 610J and the vibration direction of the diaphragm 21J are the same direction, if the amplitude of the diaphragm 21J is increased to obtain a large volume, In order to ensure the vibration stroke of the voice coil bobbin 610J, the overall height of the speaker device becomes large, and it is difficult to achieve thinning of the device. That is, there is a problem that it is difficult to achieve both a reduction in device thickness and an increase in volume.
  • the vibration of the voice coil 611J is directly transmitted to the diaphragm 21J, that is, the vibration direction of the voice coil 611J and the vibration direction of the diaphragm 21J.
  • the vibration direction of the voice coil 611J and the vibration direction of the diaphragm 21J are different, the vibration of the voice coil 611J may not be reliably transmitted to the diaphragm 21J, which causes a problem that the reproduction efficiency of the speaker device is deteriorated. Arise.
  • the voice coil bobbin 610J is joined to the inner periphery of the cone-shaped diaphragm 21J, and the driving force is transmitted from the voice coil bobbin 610J to the inner periphery of the diaphragm 21J. It is relatively difficult to drive the entire diaphragm at substantially the same phase. Therefore, a speaker device that can drive the entire diaphragm with substantially the same phase is desired.
  • a large-diameter (large-area) diaphragm is required to perform low-volume sound reproduction.
  • the driving force generated by the voice coil 611J must be increased to some extent, and in order to increase the driving force, the magnetic force As the circuit size needs to be increased, there is a problem that the speaker device cannot be thinned.
  • a capacitor type speaker device is known as a thin speaker device.
  • This capacitor type speaker device has a structure in which a diaphragm (movable electrode) and a fixed electrode are arranged facing each other.
  • the diaphragm is displaced by applying a DC voltage between the electrodes, and when a signal on which an audio signal is superimposed is input to the electrodes, the diaphragm vibrates according to the signal.
  • the driving force may change significantly in a non-linear manner, and the sound quality of the reproduced sound may be relatively low.
  • the present invention is an example of a problem to deal with such a problem. That is, to provide a thin speaker device that can radiate a large volume of reproduced sound with a relatively simple structure, to reliably transmit the vibration of the voice coil to the diaphragm, and to obtain a speaker device with high reproduction efficiency, Provided is a thin speaker device capable of emitting high-quality reproduced sound with a relatively simple structure, and also provides a thin speaker device in which a diaphragm vibrates in substantially the same phase with a relatively simple configuration. In addition, an object of the present invention is to provide a thin speaker device while enabling high-quality and high-volume sound reproduction with a large-area diaphragm.
  • the speaker device includes at least the configuration according to the following independent claims.
  • [Claim 1] A diaphragm having a substantially V-shaped cross section, a stationary portion that supports the outer periphery of the diaphragm so as to freely vibrate along a vibration direction, and an inclined surface of the diaphragm are supported by an audio signal.
  • a speaker device comprising: a voice coil arranged so as to freely vibrate along; and a rigid vibration direction converter that changes the direction of vibration of the voice coil and transmits the vibration to the diaphragm.
  • FIG. 1 is an explanatory diagram showing an overall configuration of a speaker device according to an embodiment of the present invention (FIG. 1A is a cross-sectional view taken along line AA in FIG. 1B, and FIG. 1B is a plan view).
  • FIG. 1 is an explanatory diagram showing an overall configuration of a speaker device according to an embodiment of the present invention (FIG. 1A is a cross-sectional view taken along line AA in FIG. 1B, and FIG. 1B is a plan view). It is explanatory drawing explaining the magnetic circuit and voice coil of the speaker apparatus which concern on embodiment of this invention.
  • FIG. 10 is an explanatory diagram (one-side cross-sectional view with respect to the central axis O) illustrating a configuration example of the speaker device including the vibration direction conversion unit illustrated in FIG. 9.
  • FIGS. 2 and 3 are explanatory views showing the overall configuration of the speaker device according to the embodiment of the present invention
  • FIG. 2 (a) is a cross-sectional view taken along line AA in FIG. 2 (b), and FIG. 2 (b). Is a plan view).
  • the speaker device 1 supports a diaphragm 10 having a substantially V-shaped cross section, a stationary part 100 that supports the outer periphery of the diaphragm 10 so as to vibrate freely along a vibration direction, and an inclined surface of the diaphragm 10, and And a plurality of drive units 14 that vibrate the diaphragm 10 by a signal.
  • the drive unit 14 includes a magnetic circuit 20 that forms a magnetic gap 20G along a direction different from the vibration direction of the diaphragm 10, and a magnetic gap 20G.
  • the voice coil 30 is arranged so as to freely vibrate along a uniaxial direction, and a rigid vibration direction conversion unit 50 that changes the direction of the vibration of the voice coil 30 and transmits the vibration to the diaphragm 10.
  • the diaphragm 10 is rectangular in plan view, has a substantially V-shaped cross section with a crease formed in the center portion, and has inclined surfaces 10X and 10Y.
  • the plan view is rectangular, and a flat portion 10 ⁇ / b> Z is formed in the central portion and has inclined surfaces 10 ⁇ / b> X and 10 ⁇ / b> Y on both sides thereof.
  • the diaphragm 10 only needs to have an inclined surface so that its cross section is substantially V-shaped, and may be circular, elliptical, or other shapes in plan view as will be described later.
  • the cross section of the inclined surface is not limited to a straight line, and includes, for example, a U-shape.
  • the stationary part 100 is a general term for parts that support vibrations such as the diaphragm 10 and the driving part 14, and the frame 12 corresponds to the stationary part 100 here.
  • the stationary part 100 is not intended to be completely stationary per se, but is entirely oscillated under the influence of the vibration of the driving part 14 or other force. Also good.
  • the outer peripheral portion of the diaphragm 10 is supported by a frame 12 that is a stationary portion 100 via an edge 11.
  • the drive unit 14 includes a magnetic circuit 20, a voice coil 30, and a vibration direction conversion unit 50.
  • the voice coil 30 vibrates in a uniaxial direction along the magnetic gap 20G of the magnetic circuit 20, and the vibration is converted into a vibration direction conversion unit. 50 changes its direction and transmits it to the diaphragm 10.
  • the voice coil 30 vibrates along the X-axis direction, and the diaphragm 10 is arranged so as to vibrate in the Z-axis direction perpendicular to the X-axis direction.
  • the vibration in the direction is converted into a change in its oblique angle, and the diaphragm 10 is vibrated in the Z-axis direction.
  • the voice coil 30 is formed by winding a conducting wire to which an audio signal is input, and is itself oscillated on the stationary part 100 or can be oscillated on the stationary part 100 via the voice coil support part 40. Be placed.
  • the voice coil support portion 40 can be formed of, for example, a flat insulating member, and the voice coil 30 is supported on the surface or inside thereof.
  • the voice coil 30 is held on the stationary part 100 by the holding part 15.
  • the holding unit 15 is configured to hold the voice coil 30 or the voice coil support unit 40 on the stationary unit 100 so as to be able to vibrate along the vibration direction (for example, the X-axis direction) and to prevent the voice coil 30 or the voice coil support unit 40 from moving in other directions.
  • the holding portion 15 can be deformed along the vibration direction (for example, the X-axis direction) of the voice coil 30, and can be formed by a curved plate member having rigidity in a direction crossing the vibration direction.
  • the same audio signal is input to the voice coils 30 of the plurality of driving units 14, and the respective voice coils 30 are arranged along one axis direction (for example, the X axis direction in the drawing) so as to approach or separate from each other. Vibrate.
  • the diaphragm 10 vibrates in a direction different from the vibration direction of the voice coil 30 (for example, the Z-axis direction in the drawing) via the vibration direction conversion unit 50 of each drive unit 14.
  • the vibration direction is the acoustic radiation direction SD.
  • the diaphragm 10 has the inclined surfaces 10X and 10Y, so that the diaphragm area is larger than that of the planar diaphragm. Accordingly, it is possible to obtain a high sound pressure during low sound reproduction with a smaller amplitude. Moreover, since the diaphragm 10 has a substantially V-shaped cross section, the rigidity of the diaphragm can be increased as compared with the planar diaphragm. As a result, the generation of divided vibration is suppressed, and high-quality reproduced sound can be obtained over a wide band.
  • the diaphragm since the drive unit 14 is provided for each of the inclined surfaces 10X and 10Y of the diaphragm 10, the diaphragm has a larger area than the case where the drive unit 14 is connected only to the central portion of the diaphragm 10. Even so, the entire diaphragm can be vibrated more integrally.
  • the vibration direction of the voice coil 30 and the vibration direction of the diaphragm 10 are made different from each other by the vibration direction conversion unit 50, compared with the case where the voice coil 30 is vibrated along the vibration direction of the diaphragm 10.
  • the back side of the diaphragm 10 can be reduced in thickness. As a result, a thin speaker device capable of reproducing the low sound range with high sound pressure can be obtained.
  • the speaker device 1 can be increased even if the amplitude of the diaphragm 10 is increased by increasing the amplitude of the voice coil 30.
  • the thickness in the acoustic radiation direction does not increase. This makes it possible to obtain a thin speaker device that can emit a large volume of reproduced sound.
  • FIGS. 4 to 7 are explanatory diagrams for explaining the magnetic circuit and the voice coil.
  • the magnetic circuit 20 for vibrating the voice coil 30 not only forms the magnetic gap 20G along the vibration direction of the voice coil 30, but also causes a current (voice current accompanying the voice signal) to flow through the voice coil 30.
  • the magnetic gap 20G forms a pair of magnetic fields in opposite directions.
  • the voice coil 30 can vibrate along the arrangement direction of the magnetic gap 20G in which a pair of magnetic fields are formed.
  • the magnetic circuit 20 is formed by a magnet 21 and a yoke portion 22, and is formed by arranging a pair of magnetic gaps 20G that form magnetic fields opposite to each other in the Z-axis direction at predetermined intervals in the X-axis direction.
  • the voice coil 30 is wound so that the currents flowing in the Y-axis direction are opposite to each other in the Y-axis direction, so that the Lorentz force along the X-axis direction acts on the voice coil 30.
  • the magnetic circuit 20 having the same function as described above can be formed by arranging the magnet 21 and the yoke portion 22 in several different forms.
  • the magnetic circuit 20 includes a plurality of magnets 21 (21A to 21D).
  • the magnets 21 are provided on both sides along the direction of the magnetic field of the magnetic gap 20G.
  • the yoke portion 22 includes a lower yoke portion 22A, an upper yoke portion 22B, and a column portion 22C.
  • the yoke portions 22A and 22B are disposed substantially parallel to each other with a specified interval, and the column portion 22C is formed at the center portion so as to extend in a direction substantially orthogonal to the yoke portions 22A and 22B. .
  • Magnets 21A to 21D are arranged in the yoke portions 22A and 22B, and one magnetic gap 20G2 is formed by the magnet 21A and the magnet 21C, and another magnetic gap 20G1 is formed by the magnet 21B and the magnet 21D.
  • the pair of magnetic gaps 20G1 and 20G2 are formed side by side in a plane, and magnetic fields in opposite directions are formed.
  • the voice coil 30 is formed in a substantially rectangular planar shape, and includes linear portions 30A and 30C formed along the Y-axis direction and linear portions 30B and 30D formed along the X-axis direction. It is configured.
  • the straight portions 30A and 30C of the voice coil 30 are arranged in each magnetic gap 20G of the magnetic circuit 20, and the direction of the magnetic field is defined so as to be along the Z-axis direction. It is preferable not to apply a magnetic field to the straight portions 30B and 30D of the voice coil 30. Further, even when a magnetic field is applied to the straight portions 30B and 30D, the Lorentz forces generated in the straight portions 30B and 30D are configured to cancel each other.
  • the number of turns of the voice coil 30 relatively large, a part of the voice coil 30 disposed in the magnetic gap 20G can be made relatively large, and a relatively large driving force can be obtained when the speaker is driven. it can.
  • the voice coil 30 is supported by a voice coil support portion 40 made of an insulating flat plate 41, and an example in which an opening 41b is formed in the insulating flat plate 41 is shown.
  • a voice coil support portion 40 made of an insulating flat plate 41
  • an opening 41b is formed in the insulating flat plate 41 is shown.
  • the voice coil support part 40 may not be used.
  • the magnetic circuit 20 includes a plurality of magnets 21A to 21D so that the direction of the magnetic field applied to the linear portion 30A of the voice coil 30 is opposite to the direction of the magnetic field related to the linear portion 30C.
  • the magnet 21A and the magnet 21C are magnetized in the same direction
  • the magnet 21B and the magnet 21D are magnetized in the opposite direction. Magnetization of the magnet 21 can be performed after the magnet 21 and the yoke portion 22 are assembled, but in the example shown in FIGS. 4 and 5, it is necessary to perform the magnetizing process at that time twice.
  • the magnetic gap 20G2 is formed by magnets 21A and 21C magnetized in the same direction, and the magnetic gap 20G1 is a yoke protrusion formed on each of the yoke portions 22A and 22B. It is formed between the portions 22a and 22b. According to this, the magnetizing process performed after assembling the magnet 21 and the yoke part 22 can be completed once, and the process can be simplified.
  • positioning support portions 22A 1 and 22B 1 for positioning the yoke portion 22 on a stationary portion such as the frame 12 are formed on the yoke portion 22 itself.
  • the post portion 22C described above can be omitted, and the interval of the magnetic gap 20G is defined by the positioning of the yoke portion 22 with respect to the stationary portion such as the frame 12.
  • FIGS. 8 to 12] 8 and 9 are explanatory diagrams for explaining a configuration example and operation of the vibration direction converter 50.
  • the rigid vibration direction conversion unit 50 that changes the direction of the vibration of the voice coil 30 and transmits the vibration to the diaphragm 10 is formed with joints 52 on the diaphragm 10 side and the voice coil 30 side, respectively.
  • the joint part 52 is a part that rotatably joins two rigid members, or a part that refracts or bends two integrated rigid parts.
  • the joint portion 52 is a rigid portion formed at the end.
  • the rigidity means that it does not easily deform, and does not mean that it does not deform at all.
  • the link portion 51 can be formed in a plate shape or a rod shape.
  • one link portion 51 is provided, joint portions 52 (52A, 52B) are formed at both ends thereof, and one joint portion 52A is an end portion of the voice coil 30 or the voice coil support portion 40.
  • the other joint 52B is formed on the diaphragm 10 side.
  • the joint part 52B may be connected to the diaphragm 10 or may be connected to the diaphragm 10 via another member.
  • FIG. 8A shows a case where the link portion 51 is at an intermediate position of vibration.
  • the link portion 51 is obliquely provided at an angle ⁇ 0 between the voice coil 30 (or the voice coil support portion 40) and the diaphragm 10.
  • the joint portion 52B on the diaphragm 10 side is disposed at a position Z 0 away from the voice coil 30 along the vibration direction of the diaphragm 10 by a distance H 0 .
  • the vibration direction of the voice coil 30 (or the voice coil support portion 40) is regulated so as to vibrate in one axial direction (for example, the X-axis direction), and the diaphragm 10 has a direction different from the vibration direction of the voice coil 30 ( For example, the vibration direction is regulated so as to vibrate in the Z-axis direction).
  • the position X 2 to move is formed on the end portion of the voice coil 30 joint portion 52A from the initial position X 0 to the vibration direction (-X axis direction) by [Delta] X 2 reaches Then, the inclination angle of the link portion 51 is converted to ⁇ 2 ( ⁇ 0 ⁇ 2 ), and the position of the joint portion 52B on the diaphragm 10 side is ⁇ Z 2 in the vibration direction ( ⁇ Z axis direction) of the diaphragm 10. move and reaches the position Z 2. That is, the diaphragm 10 is pushed down along the vibration direction by ⁇ Z 2 .
  • the function of the vibration direction conversion unit 50 including the link portion 51 and the joint portion 52 converts the vibration of the voice coil 30 into an angle change of the link portion 51 and transmits the change to the vibration plate 10, thereby transmitting the vibration plate. 10 is caused to vibrate in a direction different from the vibration direction of the voice coil 30.
  • FIG. 9 is an explanatory diagram for explaining another configuration example of the vibration direction conversion unit 50 and its operation. More specifically, FIG. 5B shows the state of the vibration direction converter 50 with the diaphragm 10 positioned at the reference position, and FIG. 6A shows the state where the diaphragm 10 is displaced toward the acoustic radiation side with respect to the reference position. FIG. 6C shows the state of the vibration direction conversion unit 50 in a state where the vibration plate 10 is displaced in the opposite direction with respect to the acoustic radiation side with respect to the reference position. (The diaphragm 10 is not shown).
  • the vibration direction conversion section 50 has a function of converting the angle by receiving a reaction force from the stationary section 100 where the link portion 51 is located on the opposite side to the diaphragm side.
  • the vibration direction conversion unit 50 includes a first link portion 51A having one end as a joint portion 52A on the voice coil 30 side and the other end as a joint portion 52B on the diaphragm 10 side, and one end serving as a first link portion.
  • 51 has a second link part 51B having a joint part 52C with the intermediate part 51 and a joint part 52D with the stationary part 100 at the other end, and the first link part 51A and the second link part 51B are voiced.
  • the coils 30 are inclined in different directions with respect to the vibration direction of the coil 30.
  • the vibration direction conversion unit 50 includes a first link portion 51A having one end as a first joint 52A on the voice coil 30 side and the other end as a second joint 52B on the diaphragm 10 side, A second link portion 51B having one end as a third joint portion 52C with the intermediate portion of the first link portion 51A and the other end as a fourth joint portion 52D with the stationary portion 100;
  • the joint portion 52A, the second joint portion 52B, and the fourth joint portion 52D are on a circumference having a diameter substantially equal to the length of the first link portion 51A centered on the third joint portion 52C. It is in.
  • the joint 52D is the only joint that does not change in position, and is supported by the stationary unit 100 (or the frame 12), and applies a reaction force from the stationary unit 100 to the link portion 51. ing. If a result, the voice coil 30 (or the voice coil support part 40) is moved from the reference position X 0 to X-axis direction by [Delta] X 1, as shown in FIG. 9 (a), the inclined arranged in different directions 1
  • the link portion 51A and the second link portion 51B rise substantially at the same angle, and the joint portion 52B receives the reaction force from the stationary portion 100 at the joint portion 52D, and the joint portion 52B reliably moves the diaphragm 10 to the reference position Z 0.
  • the length a of the link part from the joint part 52A to the joint part 52C, the length b of the link part from the joint part 52C to the joint part 52B, and the length c of the link part from the joint part 52C to the joint part 52D are substantially equal, and the joint portion 52A and the joint portion 52D are preferably disposed substantially parallel to the moving direction of the voice coil 30.
  • the angle formed by the straight line passing through the joint part 52A and the joint part 52D and the straight line passing through the joint part 52B and the joint part 52D is always a right angle.
  • the joint portion 52B between the first link portion 51A and the diaphragm 10 always moves along the Z-axis perpendicular to the X-axis.
  • 30 vibration directions can be converted to a direction perpendicular to the vibration direction and transmitted to the diaphragm 10.
  • FIG. 10 is an explanatory diagram showing a configuration example of the speaker device 1 including the vibration direction conversion unit 50 shown in FIG.
  • the stationary part 100 is a part of the frame 12 that supports the diaphragm 10 and the driving part 14.
  • the frame 12 has a flat bottom surface 12A, the diaphragm 10 is supported to face the bottom surface 12A of the frame 12, the magnetic gap 20G is formed along the bottom surface 12A of the frame 12, and the vibration direction changing unit 50 is a frame.
  • the diaphragm 10 is vibrated in a direction intersecting the bottom surface 12A by a reaction force from the bottom surface 12A.
  • FIG. 10 is an explanatory diagram showing a configuration example of the speaker device 1 including the vibration direction conversion unit 50 shown in FIG.
  • the stationary part 100 is a part of the frame 12 that supports the diaphragm 10 and the driving part 14.
  • the frame 12 has a flat bottom surface 12A, the diaphragm 10 is supported to face the bottom surface 12A of the frame 12, the magnetic gap 20
  • the magnetic circuit 20 includes at least a magnet 21 (21A, 21C) and a yoke portion 22 (22A, 22B), and the stationary portion 100 is formed by the yoke portion 22 (22B). Yes.
  • the stationary part 100 is formed by the yoke part 22, and by making the yoke part 22 a part of the support member, the speaker device 1 can be further reduced in thickness.
  • FIG. 11 and 12 are explanatory views showing examples of forming the vibration direction conversion unit 50 (FIG. 11 (a) is a side view, and FIG. 11 (b) is a perspective view).
  • the vibration direction converter 50 includes the link portion 51 and joint portions 52 (52A, 52B) formed at both ends thereof.
  • connection portions 53 (a first connection portion 53A and a second connection portion 53B) are formed on both ends of the link portion 51 via joint portions 52.
  • the first connecting portion 53A is a portion that is connected to the voice coil 30 or the voice coil support portion 40 and vibrates integrally with the voice coil 30, and the second connecting portion 53B is connected to the diaphragm 10 to vibrate. It is a portion that vibrates integrally with the plate 10.
  • a link portion 51, joint portions 52A and 52B, and first and second connection portions 53A and 53B are integrally formed, and the joint portions 52A and 52B include the joint portions 52A and 52B.
  • the continuous member may be a member that forms the entirety of the link portion 51 and the first and second connection portions 53A and 53B, or the link portion 51 and the first and second connection portions 53A and 53B. The member which forms a part of may be sufficient.
  • the joint part 52 is formed in a linear shape extending in the width direction as shown in FIG. Further, since the link portion 51 is required to be rigid and the joint portion 52 is required to be bendable, the thickness of the joint portion 52 is made thinner than the thickness of the link portion 51 or the connecting portion 53. By forming it into a shape, the integral member has different properties.
  • the change in thickness between the joint portion 52 and the link portion 51 is formed in an inclined surface shape, and inclined surfaces 51t and 53t whose surfaces face each other at the end portions on both sides of the joint portion 52 are formed.
  • a rigid member is integrated with a refractive continuous member to form a link portion 51 or a connecting portion 53, and the joint portion 52 is a portion only of the continuous member.
  • a rigid member 50Q is attached to the surface of a continuous member 50P, which is a bendable sheet-like member, to form a link portion 51 or a connecting portion 53.
  • the continuous member 50P is continuously extended in the part of the both sides straddling the joint part 52, and the joint part 52 is formed by this continuous member 50P so that bending is possible.
  • the link portion 51 or the connecting portion 53 in which the rigid member 50Q is attached to the continuous member 50P is formed in a portion having rigidity.
  • the link member 51 or the connecting member 53 is formed by attaching the rigid member 50Q so as to sandwich the continuous member 50P. Again, the portion where the rigid member 50Q is not attached becomes the joint portion 52.
  • the rigid member forming the link portion 51 is formed by laminating multilayer rigid members 50Q1 and 50Q2.
  • the continuous member 50P preferably has a strength and durability sufficient to withstand the refraction of the joint portion 52 that is repeated when the speaker device is driven, and has a flexibility that does not emit sound when the refraction operation is repeated.
  • the continuous member 50P can be formed of a woven or non-woven fabric of high-strength fibers.
  • woven fabrics include plain weaves of uniform materials, plain weaves with different warp and weft yarns, plain weaves with alternate yarn materials, plain weaves with twisted yarns, and plain weaves of assortment.
  • the high-strength fibers When using high-strength fibers in whole or in part, by arranging the high-strength fibers along the vibration direction of the voice coil 30, sufficient strength against vibration of the voice coil 30 can be obtained.
  • warp and weft are both high-strength fibers, both the warp and wefts are evenly tensioned and the durability is improved by tilting the fiber direction by about 45 ° with respect to the vibration direction of the voice coil 30.
  • the high-strength fiber an aramid fiber, a carbon fiber, a glass fiber, or the like can be used.
  • a dumping agent may be applied (applied).
  • the rigid member 50Q is preferably lightweight, easy to mold and rigid after curing, and thermoplastic resin, thermosetting resin, metal, paper, etc. can be used. After the rigid member 50Q is formed into a plate shape, the vibration direction changing portion 50 can be formed by adhering to the surface of the portion of the continuous member 50P excluding the joint portion 52 with an adhesive. When a thermosetting resin is used as the rigid member 50Q, the vibration direction changing portion 50 is formed by partially impregnating the resin in the link portion 51 and the connecting portion 53 of the fibrous continuous member 50P and then curing the resin. can do. When resin or metal is used as the rigid member 50Q, the continuous member 50P and the rigid member 50Q can be integrated in the link portion 51 and the connecting portion 53 by insert molding.
  • the holding unit 15 holds the voice coil 30 or the voice coil support unit 40 at a predetermined position in the magnetic gap 20G so that the voice coil 30 does not contact the magnetic circuit 20, and holds the voice coil 30 or the voice coil support unit 40. It is supported so as to vibrate linearly along the vibration direction (X-axis direction).
  • the holding unit 15 restricts the voice coil support unit 40 from moving in a direction different from the vibration direction of the voice coil support unit 40, for example, in the Z-axis direction or the Y-axis direction.
  • the holding portion 15 can be deformed along the vibration direction of the voice coil 30 and can be formed by a curved plate member having rigidity in a direction crossing the vibration direction.
  • FIG. 13 is an explanatory view showing a specific example of a holding mechanism of the voice coil support unit 40 by the holding unit 15.
  • the holding portion 15 is formed of, for example, a conductive metal, and is electrically connected to the end of the voice coil 30 or the voice coil lead wire 43 from the end at the end on the voice coil support portion 40 side. Is electrically connected to the audio signal input terminal.
  • the holding portion 15 itself may be a vibration wiring made of a conductive metal, or the holding portion 15 may be a wiring board (for example, a linear wiring is formed on the substrate). .
  • the voice coil 30 has a substantially rectangular planar shape, and linear portions 30A and 30C formed along the Y-axis direction and linear portions 30B formed along the X-axis direction. , 30D.
  • the straight portions 30A and 30C of the voice coil 30 are arranged in the magnetic gap 20G of the magnetic circuit 20, and are defined so that the direction of the magnetic field is along the Z-axis direction.
  • the holding portion 15 is a curved plate-like member that allows deformation in one direction along the vibration direction of the voice coil support portion 40 and restricts deformation in the other direction. Is held approximately symmetrically.
  • one end of each end of the holding portion 15 is attached to the voice coil support portion 40 side by the connection portion 15X, and the other end is attached to the frame side by the connection portion 15Y.
  • the connection portions 15X and 15Y are made of an insulator such as resin, and the voice coil lead wire 43 drawn from the voice coil 30 is electrically connected to the holding portion 15 using solder or the like. 15 is electrically connected to the audio signal input terminal.
  • connection portions 15X and 15Y may form an electrical connection terminal, and the connection portion 15X is connected to the end portion of the voice coil 30 or the voice coil lead wire 43 drawn from the end portion.
  • the unit 15Y may be electrically connected to the audio signal input terminal.
  • a lead wire used in a conventional speaker device vibrates when the speaker device is driven. Therefore, in order to prevent the lead wire from contacting a member constituting the speaker device, such as a frame, in a predetermined space. It is necessary to route the lead wire, which is one factor that hinders the thinning of the speaker device.
  • the voice coil lead wire 43 is formed on the voice coil support portion 40 as in the example of FIG. 13, there is no need to provide a predetermined space for routing the voice coil lead wire 43, and the speaker device can be It is possible to reduce the thickness.
  • the other end of the holding portion 15 is attached to the connecting portion 15Y, and the connecting portion 15Y supports the holding portion 15 on the frame so that the voice coil support portion 40 basically vibrates in the X-axis direction. Further, since the voice coil lead wire 43 extends to the conductive holding portion 15 and is electrically connected, the voice coil lead wire 43 and the holding portion 15 can be prevented from being disconnected, and the reliability of the speaker device can be reduced. Can be improved.
  • the holding portion 51 made of a conductive metal that is a curved plate-like member allows the movement of the voice coil support portion 6 in the direction along the X axis due to the deformation of the holding portion 15, and the curved plate in the direction along the Z axis.
  • the movement is restricted by the high rigidity of the member. Therefore, the voice coil support portion 40 is always maintained at a predetermined height with respect to the frame in the Z-axis direction.
  • the holding portion 5 substantially symmetrically, the movement of the voice coil support portion 40 in the Y direction is in a balanced state due to the elastic force of the holding portion 15, which is also held at a predetermined position with respect to the frame. Has been.
  • each joint portion 52 in the vibration direction conversion unit 50 described above is formed near the center of the diaphragm 10 with respect to the arrangement of the magnetic circuit 20.
  • the plurality of driving units 14 are disposed to face each other along an axis of symmetry when the diaphragm 10 is viewed in plan.
  • the vibration direction conversion units 50 are arranged to face each other. More specifically, the plurality of drive units 14 are disposed at substantially equal positions from the center of the diaphragm 10.
  • the magnetic circuit 20 is supported on the stationary part 100 (frame 12) near the outer periphery of the diaphragm 10.
  • the diaphragm 10 can be vibrated integrally, and the divided vibration of the diaphragm 10 is suppressed, and the reproduction band is expanded. Can expand the bass reproduction limit (lower range). Since the outer peripheral portion of the diaphragm 10 having a substantially V-shaped cross section supported by the stationary portion 100 (frame 12) via the edge 11 is a drive support portion, the inclined surface 10X, By using the rigidity of the diaphragm 10 itself by 10Y, the diaphragm 10 can be vibrated integrally.
  • the magnetic circuit 20 can be arranged by effectively using the back space of the diaphragm 10 having a substantially V-shaped cross section. 1 can be made thinner.
  • [Other forms of speaker device] 14 to 18 are explanatory views showing a speaker device according to another embodiment of the present invention.
  • the parts common to the above-described embodiment are given the same reference numerals, and the description given above is used.
  • an opening 10P is formed at a substantially central portion of the diaphragm 10.
  • the drive unit 14 can be installed on the peripheral side of the diaphragm 10
  • a space below the substantially central portion of the diaphragm 10 can be made, and an opening 10 ⁇ / b> P is formed in this space. This can be used as an installation space for various components.
  • a high-pitched sound reproduction speaker 200 is provided in the opening 10P.
  • the speaker device 1 includes a plurality of driving units 14 having the vibration direction conversion unit 50, so that a thin and high-quality bass reproduction speaker can be obtained.
  • the high-pitched sound reproduction speaker 200 substantially at the center of the diaphragm 10, a speaker system having a wide reproduction band can be constructed with high space efficiency.
  • an attachment member 201 for attaching the speaker device to the opening 10P is provided.
  • the speaker device 1 can be firmly attached to the non-attached portion.
  • the attachment member 201 can be used to make a strong attachment.
  • FIG. 15A is a cross-sectional view taken along line AA of FIG. 15B and FIG.
  • the planar shape is substantially circular.
  • an example of a substantially circular shape is shown, but an elliptical shape can be formed similarly.
  • the diaphragm 10 has a substantially circular planar shape and a substantially V-shaped cross section, and thus has a conical shape with a recessed center.
  • the drive units 14 are disposed at substantially equal positions from the center of the diaphragm 10 and are disposed to face each other along a symmetry axis in plan view.
  • a pair of the two drive units 14 is provided, but three or more drive units 14 can be arranged symmetrically about the axis.
  • the joint 52 of the vibration direction converter 50 is formed in a linear shape in the voice coil side joint 52A of the link portion 51, but the diaphragm side joint 52B is in the diaphragm. It will be formed in the shape of a dot at a location in contact with 10 curved surfaces.
  • the ring member (reinforcing member that reinforces the diaphragm 10) 202 is attached to the joint portion 52 ⁇ / b> B, and the ring member 202 is joined to the peripheral surface of the diaphragm 10.
  • An equal driving force can be applied to the diaphragm 10 while reinforcing the diaphragm 10 via 202.
  • the high-pitched sound reproduction speaker 200 is provided in the opening 10 ⁇ / b> P formed in the substantially central portion of the diaphragm 10.
  • ribs (reinforcing protrusions) 203 are formed on the diaphragm 10 along the vibration direction of the voice coil 30.
  • the ribs 203 can be formed in parallel along the side of the diaphragm 10.
  • the arc-shaped rib 203 can be formed along the outer periphery of the diaphragm 10.
  • the rigidity of the diaphragm 10 can be increased with respect to the vibration of the voice coil 30, and even the diaphragm 10 having a large area can be vibrated integrally by the plurality of driving units 14. It becomes possible.
  • the speaker device 1 Since the speaker device 1 according to the embodiment of the present invention changes the direction of the vibration of the voice coil 30 by the vibration direction conversion unit 50 and transmits it to the diaphragm 10, the amplitude of the voice coil 30 is increased to increase the vibration of the diaphragm 10. Even if the amplitude is increased, the thickness of the speaker device 1 in the acoustic radiation direction (the total height of the speaker device) does not increase. This makes it possible to obtain a thin speaker device that can emit a large volume of reproduced sound.
  • the vibration direction converter 50 reliably transmits the vibration of the voice coil 30 to the diaphragm 10 by a mechanical link mechanism having a relatively simple structure, a speaker device with high reproduction efficiency can be obtained while realizing a reduction in thickness. Therefore, it is possible to emit a high-quality reproduced sound with a relatively simple structure.
  • the diaphragm 10 having a substantially V-shaped cross section
  • the rigidity of the diaphragm 10 itself is increased, and the driving force is generated by supporting the inclined surface of the diaphragm 10 with a plurality of driving units 14. Therefore, the diaphragm 10 can be vibrated integrally even if the diaphragm 10 has a large area, and high-quality reproduced sound in which the divided vibration of the diaphragm 10 is suppressed can be emitted.
  • it is effective when low-frequency sound reproduction is performed by increasing the area of the diaphragm 10, and high-quality and high-volume low-frequency sound reproduction is possible while achieving a thin speaker device, and the low-frequency sound reproduction limit is further increased. It is possible to expand the reproduction band by lowering.
  • FIG. 19 is an explanatory diagram showing an electronic apparatus including the speaker device according to the embodiment of the present invention.
  • the electronic device 2 such as a mobile phone or a portable information terminal shown in FIG. 1A or the electronic device 3 such as a flat panel display shown in FIG. Since the space can be reduced, the entire electronic device can be made thinner. In addition, sufficient audio output can be obtained even in a thin electronic device.
  • FIG. 20 is an explanatory view showing an automobile provided with a speaker according to an embodiment of the present invention.
  • the space in the vehicle can be expanded by making the speaker device 1 thinner.
  • the speaker device 1 according to the embodiment of the present invention is installed on the door panel, the protrusion of the door panel is eliminated and the operation space of the driver can be expanded. Also, since sufficient audio output can be obtained, music and radio broadcasting can be enjoyed comfortably in the car even during high-speed driving with a lot of noise.
  • a hotel inn or training that can accommodate a large number of people, such as a house (building) intended for the residence of people, a meeting, a lecture, a party, etc.
  • the speaker device 1 When the speaker device 1 is installed in a facility or the like (building), the thickness space necessary for the installation of the speaker device 1 can be reduced, so that unnecessary space can be deleted and the space can be used effectively.
  • projectors and large-screen TVs, etc. there have been examples of providing living rooms with audio / video equipment, while living rooms without audio / video equipment have been provided. In some cases, etc. are used as theater rooms.
  • the speaker device 1 Even in such a case, by using the speaker device 1, it is possible to easily convert a living room or the like into a theater room and to effectively use the space in the living room.
  • the speaker device 1 may be arranged at, for example, a ceiling or a wall in a living room.
  • each of the above-described embodiments can divert each other's technology as long as there is no particular contradiction or problem in its purpose and configuration. Further, the technology in each of the above-described embodiments can be applied to a dynamic speaker device that uses a flat voice coil as necessary (eg, a riffel speaker device, a ribbon speaker device, a sound emitting side of a flat voice coil).
  • a dynamic speaker device that uses a flat voice coil as necessary (eg, a riffel speaker device, a ribbon speaker device, a sound emitting side of a flat voice coil).
  • the present invention can be applied to a speaker device in which a magnetic pole portion is disposed on the side opposite to the acoustic radiation side, and the speaker device can be thinned.
  • PCT / JP2008 / 051197 filed internationally on January 28, 2008 PCT / JP2008 / 68580 filed internationally on October 14, 2008, PCT / JP2009 / 050764 filed internationally on January 20, 2009, All the contents described in PCT / JP2008 / 069480 filed internationally on October 27, 2008 are incorporated in this application.

Landscapes

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

Abstract

L'invention concerne un haut-parleur de faible épaisseur capable de reproduire des basses de haut volume et de haute qualité au moyen d'une membrane à large surface. Le haut-parleur est pourvu d'une membrane (10) présentant une section transversale sensiblement en V, d'une section fixe (100) pour soutenir sous l'effet des vibrations la périphérie externe de la membrane (10) dans le sens des vibrations et de plusieurs unités de commande (14) pour soutenir un plan incliné de la membrane (10) et transmettre les vibrations à la membrane (10) en réponse à un signal audio. L'unité de commande (14) est pourvue d'un circuit magnétique (20) dans lequel est formé un entrefer (20G) dans une direction différente de celle des vibrations de la membrane (10), d'une bobine acoustique (30) disposée de façon à vibrer le long d'une direction uniaxiale dans l'entrefer (20G) et d'une section rigide de changement de direction des vibrations (50) qui change la direction des vibrations de la bobine acoustique (30) et transmet les vibrations dont la direction a été modifiée à la membrane (10).
PCT/JP2009/055526 2009-03-19 2009-03-19 Haut-parleur WO2010106685A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/055526 WO2010106685A1 (fr) 2009-03-19 2009-03-19 Haut-parleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/055526 WO2010106685A1 (fr) 2009-03-19 2009-03-19 Haut-parleur

Publications (1)

Publication Number Publication Date
WO2010106685A1 true WO2010106685A1 (fr) 2010-09-23

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PCT/JP2009/055526 WO2010106685A1 (fr) 2009-03-19 2009-03-19 Haut-parleur

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014091597A1 (fr) * 2012-12-13 2014-06-19 パイオニア株式会社 Dispositif de haut-parleur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63250995A (ja) * 1987-04-07 1988-10-18 Citizen Watch Co Ltd 薄型スピ−カ
JPS6454899A (en) * 1987-08-25 1989-03-02 Foster Electric Co Ltd Speaker
JP2005159409A (ja) * 2003-11-20 2005-06-16 Minebea Co Ltd スピーカ用振動板およびこの振動板を使用したスピーカ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63250995A (ja) * 1987-04-07 1988-10-18 Citizen Watch Co Ltd 薄型スピ−カ
JPS6454899A (en) * 1987-08-25 1989-03-02 Foster Electric Co Ltd Speaker
JP2005159409A (ja) * 2003-11-20 2005-06-16 Minebea Co Ltd スピーカ用振動板およびこの振動板を使用したスピーカ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014091597A1 (fr) * 2012-12-13 2014-06-19 パイオニア株式会社 Dispositif de haut-parleur

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