WO2011013198A1 - Dispositif haut-parleur - Google Patents

Dispositif haut-parleur Download PDF

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Publication number
WO2011013198A1
WO2011013198A1 PCT/JP2009/063409 JP2009063409W WO2011013198A1 WO 2011013198 A1 WO2011013198 A1 WO 2011013198A1 JP 2009063409 W JP2009063409 W JP 2009063409W WO 2011013198 A1 WO2011013198 A1 WO 2011013198A1
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WO
WIPO (PCT)
Prior art keywords
voice coil
speaker device
vibration direction
diaphragm
vibration
Prior art date
Application number
PCT/JP2009/063409
Other languages
English (en)
Japanese (ja)
Inventor
泰久 阿部
実 堀米
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/JP2009/063409 priority Critical patent/WO2011013198A1/fr
Publication of WO2011013198A1 publication Critical patent/WO2011013198A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H04R9/047—Construction in which the windings of the moving coil lay in the same plane
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones

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 magnetic circuit mainly includes a magnet height (d) corresponding to a height from the upper surface of the yoke 51J to the yoke 51J, and the yoke 51J mainly includes a thickness (e) 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 diameter of the columnar voice coil does not contribute to a reduction in the overall thickness of the speaker device even if the direction of vibration of the voice coil is different from that of the speaker.
  • the voice coil in a planar shape and vibrate the voice coil along the planar direction.
  • the current flowing in the direction orthogonal to the vibration direction of the voice coil becomes a part of the current flowing through the voice coil, and there arises a problem that the voice current cannot be efficiently converted into electromagnetic force or driving force of the speaker device.
  • the present invention is an example of a problem to deal with such a problem. That is, it is possible to provide a thin speaker device that can radiate a large volume of reproduced sound, to change the direction of the vibration of the voice coil and efficiently transmit it to the diaphragm, It is an object of the present invention that a sufficient electromagnetic force can be obtained when the voice coil is driven along the direction.
  • the speaker device includes at least a configuration according to the following independent claims.
  • a diaphragm A diaphragm, a stationary part that supports the diaphragm so as to vibrate freely along a vibration direction, and a drive part that is provided in the stationary part and that vibrates the diaphragm by an audio signal
  • the driving unit receives a voice signal and vibrates along a direction different from the vibration direction of the diaphragm, a magnetic circuit that forms a magnetic path passing through the voice coil, and vibration of the voice coil
  • a rigid vibration direction changing portion that changes the direction of the sound and transmits it to the diaphragm, the magnetic circuit includes a plurality of the magnetic paths, the voice coil is formed in a flat plate shape, and extends from one end to the other end.
  • a speaker device comprising a plurality of continuous conductive members, wherein a part of the plurality of conductive members are arranged in the same direction and arranged in the magnetic path.
  • FIG. 5 (a) is a side view
  • FIG.5 (b) is a perspective view
  • FIG.5 (c) is an A section enlarged view).
  • FIG. 2 [Basic configuration of speaker device; FIG. 2] 2A and 2B are explanatory views showing the basic configuration of the speaker device according to the embodiment of the present invention (FIG. 2A is a cross-sectional view along the X-axis direction, and FIG. 2B shows the operation of the drive unit). Explanatory drawing).
  • the speaker device 1 includes a diaphragm 10, a stationary unit 100 that supports the diaphragm 10 so as to freely vibrate along a vibration direction, a driving unit 14 that is provided in the stationary unit 100 and that vibrates the diaphragm 10 with an audio signal.
  • the drive unit 14 includes a magnetic circuit 20 that forms a magnetic gap 20G, a voice coil 30 that receives an audio signal and vibrates in a direction different from the vibration direction of the diaphragm 10, and the direction of vibration of the voice coil 30.
  • a vibration direction conversion unit 50 that converts and transmits the vibration to the diaphragm 10 is provided.
  • the voice coil 30 is supported by the voice coil support unit 40, but the voice coil 30 itself may be connected to the vibration direction conversion unit 50.
  • the vibration direction of the voice coil 30 is defined as the X-axis direction, and the two directions orthogonal thereto are defined as the Y-axis direction and the Z-axis direction, respectively.
  • the diaphragm 10 may have a substantially rectangular shape in plan view, a circular shape, an elliptical shape, or other shapes.
  • the cross-sectional shape of the diaphragm 10 can be formed in a predetermined shape such as a flat plate shape, a dome shape, or a cone shape, for example.
  • the cross-sectional shape of the diaphragm 10 is a plane, but may be a curved shape.
  • the overall height of the diaphragm 10 may be made relatively small, and the speaker device 1 may be thinned.
  • the stationary part 100 is a general term for parts that support vibrations such as the vibration plate 10 and the driving part 14.
  • the stationary part 100 includes a frame 12, a yoke part that also functions as the frame 12, and a mounting unit (to be described later). It hits.
  • 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 diaphragm 10 is vibrated in the Z-axis direction by converting the vibration in the direction into a changing oblique angle.
  • the magnetic circuit 20 includes a magnet 21 (21A, 21B) and a magnetic pole member (yoke part) 22 (22A, 22B) so that a plurality of magnetic gaps 20G are arranged along the vibration direction (for example, the X-axis direction) of the voice coil 30. It has.
  • the magnetic pole directions of the magnets 21 (21A, 21B) are set so that the magnetic field directions of the pair of magnetic gaps 20G are opposite to each other ( ⁇ Z-axis direction), and the magnetic gaps having magnetic fields in the opposite directions.
  • a direction along the magnetic gap 20G ( ⁇ X-axis) is arranged in the voice coil 30.
  • Direction electromagnetic force (Lorentz force).
  • the arrangement relationship between the magnet 21 and the magnetic pole member (yoke part) 22 is not limited to the illustrated example.
  • the voice coil 30 is formed by winding a conducting wire (conductive member) to which an audio signal is input, and is itself arranged so as to be able to vibrate on the stationary part 100 or the stationary part 100 via the voice coil support part 40. Is arranged so as to freely vibrate.
  • 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. By forming the voice coil support portion 40 with, for example, a flat insulating member, rigidity (including bending rigidity and torsional rigidity) can be added to the entire voice coil 30.
  • a plurality of conductive layers are patterned on the outer side of the conducting wire on the flat insulating member as the voice coil support portion (base body) 40.
  • the conductive layer 32 (see FIG. 27) is electrically connected to a lead line 31 (see FIG. 27) drawn from the start point and end point of the conducting wire.
  • the lead line 31 (see FIG. 27) is constituted by a part of a conductive member described later, for example. Further, it is electrically connected to the outside via a holding unit 15 (see FIG. 27) described later, and functions as a relay line for inputting a voice signal from the outside to the voice coil 30.
  • a space for routing the wiring is required separately.
  • the conductive layer 32 (see FIG. 27) as a relay line on the surface of the voice coil support portion 40, it is not necessary to secure a space for the relay line, and the speaker device can be thinned.
  • a pair of the conductive layers 32 can be disposed so as to surround the conductive member forming the voice coil 30 and function as a relay line for inputting an audio current to the conductive member.
  • the voice coil 30 and the voice coil support portion 40 are formed in a flat plate shape, but are not limited to this, and may be formed in a cylindrical shape.
  • the vibration direction conversion portion is connected to the end portion on the vibration direction conversion portion 50 side so that the angle can be changed. You may attach the flat cover part which makes it possible.
  • the voice coil 30 is held on the stationary part 100 by a holding part (not shown).
  • the holding unit is configured to hold the voice coil 30 or the voice coil support unit 40 so as to freely vibrate along the vibration direction (for example, the X-axis direction) with respect to the stationary unit 100 and to prevent the voice coil 30 or the voice coil support unit 40 from moving in other directions.
  • the holding portion 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 voice coil 30 may have a relatively large voice coil length in a direction orthogonal to the vibration direction of the voice coil 30 relative to the length of the voice coil 30 in the vibration direction. Large driving force can be obtained.
  • the vibration direction conversion part 50 is formed at the both ends of the link part 51 and the rigid link part 51 that is obliquely provided so that the angle can be freely changed between the voice coil 30 or the voice coil support part 40 and the diaphragm 10.
  • the joint part 52 used as the fulcrum of the angle change of the conversion part 50 is provided.
  • the connecting portion 53 of the vibration direction conversion unit 50 is, for example, an adhesive as a bonding member or both surfaces of the vibration plate 10 or the voice coil 30 or the attached member 200 including other members than the vibration plate 10 and the voice coil 30. They are connected by a connecting member such as a tape or a screw as a fastening member, and the joint portion 52 is arranged so as to be close to the attached member 200.
  • the connecting portion 53 (53A) at one end of the vibration direction changing portion 50 is connected to the voice coil 30 or the voice coil support portion 40 via the connecting portion 60, but directly without using the connecting portion 60. You may connect.
  • the connecting portion 60 is formed between the end portion on the voice coil side of the vibration direction converting portion 50 and the end portion on the vibration direction changing portion side of the voice coil 30 or the voice coil support portion 40, and both ends thereof in the vibration direction. They are connected at intervals along the line.
  • the connection part 60 absorbs the thickness of the magnetic circuit 20, and is aiming at thickness reduction of a speaker apparatus.
  • a contact avoiding portion 70 that avoids contact with the joint portion 52 is formed on the surface side of the attached member 200 adjacent to the joint portion 52 of the vibration direction changing portion 50.
  • the contact avoiding portion 70 also functions as a joining member accommodating portion (constraining portion) that accommodates and restrains the joining member that joins the vibration direction changing portion 50 and the attached member 200.
  • the contact avoiding portion 70 is formed in a concave shape along the joint portion 52, for example, a concave portion, a notch portion, a groove portion or the like, and the joint portion 52 and the surface of the attached member 200 disposed in the vicinity of the joint portion 52.
  • a predetermined space is formed between the joint portion 52 and the adhesive member interposed between the vibration direction changing portion 50 and the attached member 200.
  • a notch 71 is formed as a contact avoidance portion 70 in the connecting portion 60 to be the attached member 200 so as to be close to the joint portion 52 (52A), and a recess 72 is provided as the contact avoidance portion 70 in the diaphragm 10. It forms so that it may adjoin to joint part 52 (52B).
  • a bonding member such as an adhesive or a double-sided tape
  • the adhesive protrudes toward the joint part 52.
  • the end portion of the double-sided tape enters the cutout portion 71 or the concave portion 72 so as not to contact and adhere to the joint portion 52.
  • such a speaker device 1 inputs a voice signal SS as an electrical signal to the voice coil 30 of the drive unit 14, thereby providing a magnetic signal as shown in FIG.
  • the voice coil 30 or the voice coil support portion 40 vibrates in the X-axis direction shown in the figure along the magnetic gap 20G of the circuit 20, for example.
  • the vibration is changed in direction by the vibration direction converter 50 and transmitted to the diaphragm 10, and the diaphragm 10 is vibrated in, for example, the Z-axis direction shown in FIG. A corresponding sound is emitted.
  • the voice coil 30 is moved along the vibration direction of the diaphragm 10.
  • the back side of the diaphragm 10 can be made thinner. 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.
  • the adhesive diffuses and extends with the joining and protrudes toward the joint portion 52.
  • the joint portion 52 may harden and become unable to move.
  • the joint portion 52 may harden and become inoperable. There is. Further, the joint portion 52 that has been cured by adhering an adhesive or an end portion of a double-sided tape may be broken due to repeated bending, refraction, or rotational movement.
  • the portion where the adhesive or the end of the double-sided tape is attached contacts or leaves the attached member 200 such as the diaphragm 10, the voice coil 30, or other members. Repeatedly, an abnormal sound (a hit sound) is generated each time.
  • the vibration direction changing portion 50 and the attached member 200 are reduced. There is a problem that the coupling force is reduced, and peeling or the like occurs from the end surface, resulting in abnormal noise, or even complete peeling that leads to destruction of the speaker.
  • the joint portion 52 is disposed in the vicinity of the attached member 200, the joint portion 52 comes into contact with the attached member 200, the joint portion 52 is damaged, or the vibration direction changing portion 50 is attached to the attached member. In some cases, bending, refraction, or rotational movement with respect to 200 cannot be performed. However, in this speaker device 1, since the contact avoiding portion 70 is formed on the surface side of the mounted member 200 close to the joint portion 52, the contact with the joint member 52 is suppressed and abnormal noise is generated due to the contact. Can be suppressed.
  • a bonding member such as an adhesive or a double-sided tape used to connect the connecting portion 53 of the vibration direction changing portion 50 and the attached member 200 protrudes, a contact avoiding portion that functions as a bonding member restraining portion. It is possible to prevent the movement of the joint portion 52 from being blocked by entering the 70 and adhering to the joint portion 52. As a result, the function of the joint portion 52 can be maintained while maintaining a high coupling force between the vibration direction converter 50 and the attached member 200. Since the vibration direction converter 50 reliably bends, refracts, or rotates with respect to the attached member 200, contact of the joint portion 52 to the attached member 200 due to breakage, generation of abnormal noise, and the like can be suppressed.
  • FIGS. 3 to 14 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 vibration plate 10 forms joint portions 52 on the vibration plate 10 side and the voice coil 30 side in the vibration direction of the voice coil 30. It has the link part 51 inclined with respect to it.
  • 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 the vibration of the voice coil 30 is not deformed to such an extent that it can be transmitted to the diaphragm 10, 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 portion 52B is formed on the diaphragm 10 side.
  • the other joint portion 52B may be connected to the diaphragm 10 or may be connected to the diaphragm 10 via another member.
  • a known member can be used.
  • a metal member that improves the joint strength between the joint portion 52 and the diaphragm 10 may be selected (the diaphragm 10 is not shown in FIG. 3). is doing).
  • FIG. 5A 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 by a distance H 0 along the vibration direction of the diaphragm 10.
  • 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 vibration direction of the diaphragm 10 is different from the vibration direction of the voice coil 30.
  • the vibration direction is regulated so as to vibrate (eg, 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 vibration plate 10 side is ⁇ Z 2 in the vibration direction ( ⁇ Z axis direction) of the vibration plate 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 part 51 and the joint part 52 converts the vibration of the voice coil 30 into the obliquely changing angle of the link part 51 and transmits it to the diaphragm 10.
  • the vibration plate 10 is caused to vibrate in a direction different from the vibration direction of the voice coil 30.
  • FIG. 4 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 in a state where the diaphragm 10 is located at the reference position, and FIG. 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 such as the frame 12 where the link portion 51 is located on the opposite side to the diaphragm side.
  • the vibration direction converter 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 as a first link portion. 51 and a second link portion 51B having the other end as a joint portion 52D with the stationary portion 100.
  • the first link portion 51A and the second link portion 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 portion 52A on the voice coil 30 side and the other end serving as a second joint portion 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 portion 52 ⁇ / b> D is the only joint portion whose position does not change and is supported by the stationary portion 100 (or the frame 12), and applies a reaction force from the stationary portion 100 to the link portion 51. ing.
  • the voice coil 30 or the voice coil support section 40
  • ⁇ X 1 in the X-axis direction from the reference position X 0
  • the link part 51A and the second link part 51B rise substantially at the same angle, and the joint part 52B receives the reaction force from the stationary part 100 at the joint part 52D, and the joint part 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 vibration 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 are at right angles.
  • the joint portion 52B between the first link portion 51A and the diaphragm 10 moves along the Z-axis perpendicular to the X-axis.
  • Can be transmitted to the diaphragm 10 by converting the vibration direction thereof into a direction perpendicular thereto.
  • 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 directly or via another member and vibrates integrally with the voice coil 30, and the second connecting portion 53B. Is a portion that is connected to the diaphragm 10 directly or via another member and vibrates integrally with the diaphragm 10.
  • the link portion 51, the joint portions 52A and 52B, and the 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 portion 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 have a rigidity that does not deform, and the joint portion 52 is required to be refractable, the thickness of the joint portion 52 with respect to the thickness t1 of the link portion 51 or the connecting portion 53. By forming the thickness t2 in a thin 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. Thereby, when the angle of the link portion 51 is changed, the thickness of the link portion 51 can be prevented from interfering with the angle change.
  • the contact avoiding portion 70 is a recess or notch 71, and in the example shown in FIG.
  • a space is formed between the joint portion 52A and the connecting portion 60.
  • the diaphragm 10 of the mounted member 200 disposed in the vicinity of the joint portion 52B is formed with a concave portion or notch portion 72 as the contact avoiding portion 70, and a concave portion having a curved cross section in the illustrated example.
  • a space is formed between the joint portion 52B and the diaphragm 10.
  • the adhesive is bonded to the joint portions 52A, Even if it protrudes toward 52B, it enters the recess or notch 71, 72, so it does not adhere to the joint portions 52A, 52B, and even if attached, it is only a portion that is not a joint (a portion having rigidity that does not bend or bend). The hindrance to the bending operation or the bending operation of the joint portions 52A and 52B can be suppressed.
  • a rigid member is integrated with a refracting continuous member to form a link portion or a connecting portion, and the joint portion is a portion constituted by a 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 substantially formed only by the 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 in a multilayer by laminating the rigid members 50Q1 and 50Q2. Furthermore, in the same figure (c), you may make the rigid member 50Q1 or the rigid member 50Q2 into a multilayer structure. In this way, by partially attaching the rigid member 50Q to the refracting continuous member 50P, the refracting joint portion 52, the rigid link portion 51, and the connecting portion 53 can be integrally formed.
  • the continuous member 50P is preferably strong and durable enough to withstand the refraction of the joint portion 52 repeated when the speaker device is driven, and flexible so that no sound is emitted 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 different yarn materials alternately, plain weaves with twisted yarns, flat weaves of assortment, etc.
  • the high-strength fiber When all or part of the high-strength fiber is used, the high-strength fiber is arranged along the vibration direction of the voice coil support portion 40, which is sufficient for the vibration of the voice coil 30 or the voice coil support portion 40. Strength can be obtained. When warp and weft are both high-strength fibers, both the warp and wefts are evenly tensioned by tilting the fiber direction by approximately 45 ° with respect to the vibration direction of the voice coil support section 40 to improve durability. Can be made. As the high-strength fiber, an aramid fiber, a carbon fiber, a glass fiber, or the like can be used. Further, in order to adjust physical properties such as bending stress and rigidity of the continuous member, a dumping agent (damping agent, braking material) may be applied (applied).
  • a dumping agent damping agent, braking material
  • the rigid member 50Q is preferably lightweight, easy to mold and rigid after curing, and thermoplastic resin, thermosetting resin, metal, paper, or the like can be used. After the rigid member 50Q is formed into a plate shape, the vibration direction changing portion 50 can be formed by sticking the surface of a portion excluding the joint portion 52 of the continuous member 50P with an adhesive as a bonding agent. 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.
  • FIG. 7 and 8 are explanatory views showing a speaker device employing the above-described vibration direction converter
  • FIG. (b) is an explanatory view showing the operation of the drive unit.
  • the first connecting portion 53A that is connected to the voice coil support portion 40 and vibrates integrally with the voice coil support portion 40, and is connected to the diaphragm 10 and vibrates.
  • a link mechanism 50 ⁇ / b> L including a second connecting portion 53 ⁇ / b> B that vibrates integrally with the plate 10 and including a plurality of link portions is formed.
  • the vibration direction converter 50 is formed by a link mechanism 50L including a rigid first link portion 51A and a second link portion 51B.
  • the first link portion 51A has a first connection portion 53A formed on one end side via a joint portion 52A, and a second connection portion 53B formed on the other end side via a joint portion 52B.
  • the second link portion 51B is formed with an intermediate portion of the first link portion 51A via a joint portion 52C on one end side, and does not move against vibration of the voice coil support portion 40 via the joint portion 52D on the other end side.
  • the connecting portion 53C is formed.
  • the first connecting portion 53A is connected to the end of the voice coil support portion 40 via the connecting portion 60 or directly, and the second connecting member 53B is directly connected to the diaphragm 10.
  • the stationary connection portion 53 ⁇ / b> C is connected to the bottom portion 12 ⁇ / b> A of the frame 12 that becomes the stationary portion 100.
  • the first link portion 51 ⁇ / b> A and the second link portion 51 ⁇ / b> B are inclined in different directions with respect to the vibration direction (X-axis direction) of the voice coil support portion 40, and the stationary portion 100 is in relation to the vibration direction conversion portion 50. It is provided on the side opposite to the diaphragm 10 side.
  • the stationary portion 100 is formed by the bottom portion 12A of the frame 12, but instead, the yoke portion 22A of the magnetic circuit 20 extends below the vibration direction changing portion 50, and the yoke portion 22A is The stationary part 100 may be used.
  • the joint portion 52A on the voice coil support portion 40 side moves in the X-axis direction as the voice coil support portion 40 moves, and the joint portion 52D connected to the stationary portion 100 is fixed.
  • the movement of the joint portion 52A is converted into a changing angle between the first link portion 51A and the second link portion 51B by the reaction force received from the stationary portion 100, and the joint portion 52B on the diaphragm 10 side Is moved in the vibration direction of the diaphragm 10 (for example, the Z-axis direction).
  • the speaker device 1B shown in FIG. 8 includes the drive units 14 shown in FIG. 7 arranged symmetrically facing each other, and includes drive units 14 (R) and 14 (L).
  • R drive units 14 (R) and 14 (L).
  • R drive units 14 (R) and 14 (L).
  • R drive units 14 (L) and 14 (L).
  • R drive units 14 (L) and 14 (L).
  • the link mechanisms 50L (R) and (L) include a pair of first link portions 51A, a pair of second link portions 51B, a pair of first connection portions 53A, and a second connection portion that are arranged to face each other. 53B and the immovable connecting portion 53C are integrally formed to form the vibration direction changing portion 50.
  • the pair of first connection portions 53A are respectively connected to the voice coil support portion 40, the second connection portion 53B is connected to the diaphragm 10, and the stationary connection portion 53C is connected to the bottom portion 12A of the frame 12.
  • the two drive units 14 (R), 40 (R), 40 (L) are reversed by synchronizing the vibration directions of the voice coil support units 40 (R), 40 (L).
  • the diaphragm 10 can be vibrated by combining the electromagnetic force of 14 (L). Further, since the joint portion 52B on the diaphragm 10 side can be provided at a plurality of locations, the support points of the diaphragm 10 are increased, and the vibration phase of the diaphragm 10 can be matched.
  • FIG. 9 and 10 are explanatory views showing a more specific vibration direction converting portion
  • FIG. 9A is a perspective view
  • FIG. 9B is an enlarged view of a portion A in FIG. 9A
  • FIG. 10 (a) is a plan view of a state in which the joint portion is stretched and the whole is flattened
  • FIG. 10 (b) is a side view of a state in which the joint portion is stretched and the whole is flattened.
  • the vibration direction changing part 50 is formed by one integrated part, and as described above, the pair of first link parts 51A and the joint parts 52A and 52B are formed at both ends thereof, and the pair of first link parts 51A and 52B are formed.
  • Two link portions 51B and joint portions 52C and 52D are formed at both ends thereof. Further, a first connection portion 53A is formed on one end side of the pair of first link portions 51A via a joint portion 52A, and the joint portions 52B formed on the other end side of the pair of first link portions 51A. A second connecting portion 53B is formed, and a stationary connecting portion 53C is formed between the joint portions 52D formed on the other end side of the second link portion 51B.
  • the first link portions 51A and 51A and the second connection portion 53B are refracted in a convex shape, and the second link portions 51B and 51B and the stationary connection portion 53C are refracted in a concave shape.
  • the joint portion 52A is formed to be refracted by the above-described continuous member 50P, and the above-described rigid member 50Q is attached to the first link portion 51A, so that the first connecting portion.
  • the above-described rigid member 50Q is also attached to 53A.
  • all the joint parts mentioned above are formed in the same composition.
  • inclined surfaces 51t and 53t are formed to face each other.
  • the vibration direction changing portion 50 including the link portions 51A and 51B, the joint portions, and the connecting portions 53A, 53B, and 53C is formed from an integral sheet-like component.
  • the joint portion 52A is formed so as to linearly cross the integral sheet-like component, and the joint portions 52B, 52C, 52D are formed so as to partially traverse the integral sheet-like component.
  • the second link portions 51B and 51B and the stationary connection portion 53C are cut out by forming a pair of cutout portions 50S along the longitudinal direction of the integral sheet-like component.
  • a resin material for forming the rigid member 50Q is applied to the entire surface of the continuous member 50P that is a sheet-like member.
  • V-shaped die cutting is performed. Thereafter, the above-described notch 50S is formed, and the resin material is cured.
  • the resin material used here a liquid uncured resin material or a resin film can be used.
  • the rigid member 50Q may be formed simultaneously with the resin material. At this time, it is preferable that a groove or a recess having a V-shaped cross section is formed in advance in a mold for molding the rigid member 50Q.
  • FIGS. 11A and 13 are explanatory diagrams illustrating another example of the vibration direction converter 50 (FIG. 11A is a side view, FIG. 11B is a perspective view, and FIG. 12 is an operation explanatory diagram).
  • FIGS. 13A and 13B are explanatory diagrams of formation examples.
  • This vibration direction conversion part 50 (link mechanism 50L) is a case where a pair of drive parts are provided and the vibration direction conversion parts 50 are arranged opposite to each other substantially symmetrically, and a parallel link is formed by a plurality of link portions. Yes.
  • the vibration direction converter 50 has one end as a joint portion 52A (R), 52A (L) with the first connection portion 53A (R), 53A (L) and the other end as a joint with the second connection portion 53B.
  • a pair of first link portions 51A (R) and 51A (L) are provided as portions 52B (R) and 52B (L).
  • one end is a joint part 52C (R), 52C (L) with the intermediate part of the first link parts 51A (R), 51A (L), and the other end is a joint part 52D ( R) and 52D (L) have a pair of second link portions 51B (R) and 51B (L).
  • the first connecting portion 53A is connected to the voice coil 30 or the voice coil support portion 40 directly or via the connecting portion 60 as another member, and the second connecting portion 53B is connected to the diaphragm 10.
  • the stationary connection portion 53 ⁇ / b> C is connected to the bottom portion 12 ⁇ / b> A of the frame 12 that becomes the stationary portion 100, the yoke portion 22 that forms the magnetic circuit 20, and the like.
  • Such a link mechanism 50L of the vibration direction changing section 50 has a function of combining the link mechanism of the embodiment shown in FIG. 7 and the parallel link mechanism, and each link portion and the connecting portion are connected to the continuous member 50P.
  • the rigid members 50Q are integrally formed with each other, the joint portions between the link portions are formed in a linear shape by a refracting continuous member 50P, and the link portions are formed integrally with each other via the joint portions. Yes.
  • the second connecting portion 53B disposed in the vicinity of the joint portions 52F (R) and 52F (L) and the pair disposed in the vicinity of the joint portions 52A (R) and 52A (L).
  • a recess 76 is formed as the contact avoiding portion 70 so that a space is formed between each joint portion and the connecting portion.
  • this vibration direction converter 50 will be described with reference to FIG.
  • the stationary connection portion 53 ⁇ / b> C supported by the frame 12 functions as the stationary portion 100.
  • the second is performed by the parallel link mechanism.
  • the first link portions 51A (R), (L) and the third link portions 51C (R) forming the parallel links are raised while maintaining the parallel connection portion 53B and the connection portion 53E integrated therewith in a parallel state. ), (L) is changed so that the angle rises.
  • the first link portion 51A (R) receives the reaction force from the stationary portion.
  • (L) and the third link portions 51C (R), (L) are reliably changed, and the displacement of the joint portions 52A (R), (L) from the position X0 to the position X1 is determined by the diaphragm 10. Is reliably converted into a displacement from the position Z0 to the position Z1.
  • the angle of the portions 51C (R) and (L) is reliably changed, and the displacement of the joint portions 52A (R) and (L) from the position X0 to the position X2 is changed from the position Z0 to the position Z2 of the diaphragm 10. Hence convert to
  • (L) and the second connecting portion 53B are converted into vibrations in the Z-axis direction.
  • the diaphragm 10 is supported in a wide range and is provided with vibrations having substantially the same phase and substantially the same amplitude. Therefore, the vibration of the voice coil support unit 40 with respect to the planar diaphragm 10 having a large area is provided. Can be transmitted in substantially the same phase.
  • the vibration direction converter 50 has the connecting portions 53B, 53D (R), (L), and the third link portions 51C (R), (L) parallel to a pair in the width direction.
  • the first link portions 51A (R) and (L) are formed in a bifurcated manner, and the joint portions 52C (R) and the second link portions 51B (R) and (L) are formed at intermediate portions thereof.
  • (L) is formed, and the second link portions 51B (R), (L) and the connecting portion 53C are connected in parallel in a pair in the width direction 53B, 53D (R), (L), third. Between the link portions 51C (R) and (L).
  • the link portion By forming the link portion with a single sheet-like (plate-like) component in this way, the diaphragm 10 can be supported and vibrated on the surface, so that the entire diaphragm 10 can be vibrated substantially in phase. It is possible to suppress divided vibration.
  • the vibration direction converter 50 of this embodiment refracts the entire plate-like member forming the link portion into a convex shape so that the first link portion 51A (R). , (L) and the second connecting portion 53B are formed, and the plate-like member is partially cut out and refracted into a concave shape so as to be fixed to the second link portions 51B (R), (L). 53C is formed.
  • the vibration direction changing portion 50 is formed by bonding a plurality of (two) sheet-like (plate-like) parts 501, 502, In the sheet-like component 501, the first connecting portions 53A (R), (L), the first link portions 51A (R), (L), the second link portions 51B (R), (L), second The connecting portion 53B and the stationary connecting portion 53C are formed, and the connecting portion 53D, the third link portions 51C (R) and (L), and the connecting portion 53E are formed on the other sheet-like component 502.
  • the connecting portions 53D (R), (L) and the third link portions 51C (R), (L) are connected along the first link portions 51A (R), (L) and the second connecting portion 53B.
  • the sheet-like component 502 is formed with an opening 502A corresponding to the second link portions 51B (R) and (L) and the stationary connection portion 53C.
  • the size of the opening 502A formed in the other sheet-like component 502 corresponding to the second link portions 51B (R), (L) and the stationary connection portion 53C in one sheet-like component 501 is as follows.
  • the other sheet-like component 502 is formed so as to expand from one end to the inside. By doing so, the second link portions 51B (R), (L) and the immovable connecting portion 53C are prevented from coming into contact with other sheet-like parts 502, and the link mechanism moves smoothly. Can be made.
  • the two parts 501 and 502 are connected with the continuous member 50P facing each other.
  • the continuous member 50P can be integrated and the joint portion 52 can be smoothly refracted.
  • a recess or notch 76 is formed as a contact avoidance portion 70 at a location close to the joint portion 52.
  • an inclined surface as shown in FIG. 5C is formed at the end of each link part.
  • the inclined surfaces are formed so as not to interfere with each other when the link portion is refracted at the joint portion, so that the link portion can be efficiently refracted at the joint portion.
  • the above-described sheet-like component 502 is formed integrally with the end of the above-mentioned sheet-like component 501, and the folding line f is formed in the direction of the arrow.
  • the vibration direction converter 50 shown in FIGS. 11 and 12 can be obtained.
  • a resin material for forming the rigid member 50Q is laminated on the entire surface of the continuous member 50P, which is a sheet-like member, to form each joint portion and inclined surfaces on both sides thereof. After forming a groove or recess having a V-shaped cross-section and curing with a resin material, the above-described notch 50S and opening 502A can be formed easily.
  • the rigid member 50Q may be formed simultaneously with the resin material. At this time, it is preferable that a groove or a recess having a V-shaped cross section is formed in advance in a mold for molding the rigid member 50Q.
  • the link mechanism of the vibration direction conversion unit 50 can be formed by using one integral part for the two opposing voice coil support units 40. Therefore, the assembly work can be easily performed even when a speaker device including a pair of drive units is formed. Further, by providing the immovable connecting portion 53C, the joint portion 52D (particularly with respect to the opposing vibration of the voice coil support portion 40 (the plurality of voice coil support portions 40 vibrate in opposite directions to each other). Even if R) and (L) are not supported by the frame 12, the positions of the joint portions 52D (R) and (L) are held constant, and this also leads to the speaker device of the vibration direction conversion unit. Can be simplified.
  • the right first link portion 51A (R) and the third link portion 51C (R), and the left first link portion are used as the link mechanism. Since the parallel link is formed by 51A (L) and the third link portion 51C (L), the second connecting portion 53B fixed to the diaphragm 10 against the opposing vibration of the voice coil support portion 40 is Z. It can be translated stably along the axial direction. As a result, it is possible to apply stable vibration to the planar diaphragm 10.
  • the electromagnetic force of the magnetic circuit 20 or the vibration of the voice coil 30 is increased. Does not directly affect the size of the speaker devices 1, 1A, 1B in the thickness direction (Z-axis direction). Therefore, it is possible to reduce the thickness of the speaker devices 1, 1A, 1B while increasing the volume.
  • the vibration direction conversion unit 50 converts the vibration direction of the voice coil support unit 40 and transmits it to the diaphragm 10 by a mechanical link mechanism, the vibration transmission efficiency is high.
  • the angle change between the first link portion 51A and the second link portion 51B is caused by the vibration of the voice coil support portion 40 and the reaction force from the stationary portion 100.
  • vibration from the voice coil support 40 can be transmitted to the diaphragm 10 more reliably. Thereby, good reproduction efficiency of the speaker devices 1A and 1B can be obtained.
  • the position of the end 40 ⁇ / b> A of the voice coil 30 or the voice coil support unit 40 and the vibration direction conversion unit can be provided by providing the connecting unit 60.
  • a step (interval) can be formed between the positions of the 50 end portions 50A.
  • the width (height) of the magnetic circuit 20 in the Z-axis direction can be accommodated within the height of the vibration direction converter 50, and the height of the magnetic circuit 20 required for securing the electromagnetic force can be reduced.
  • the speaker devices 1, 1 ⁇ / b> A, 1 ⁇ / b> B can be thinned while ensuring sufficient.
  • the necessary height of the vibration direction converting portion 50 (the length of the link portion 51) can be sufficiently secured.
  • the amplitude of the diaphragm 10 can be made relatively large.
  • the vibration of the voice coil support 40 can be stabilized by forming the bottom 61 of the connecting portion 60 so as to slide on the bottom 12A of the frame 12 or the stationary portion 100 with a predetermined gap. Is possible.
  • the movement of the end of the vibration direction converter 50 can be performed linearly, and the movement of the end of the vibration direction converter 50 connected to the diaphragm 10 can be reliably and stabilized.
  • the vibration direction conversion unit 50 shown in FIG. 14 is an improved example of the form shown in FIG.
  • the convex portion 510 is provided on the link portion where bending is likely to occur due to the opposing vibration of the voice coil support portion 40 to increase the rigidity.
  • the first link portions 51A (R), (L), the second link portions 51B (R), (L), the connecting portions 53D (R), (L), and the connecting portions 53C are convex.
  • a portion 510 is provided.
  • an opening 520 is provided in a link portion that does not particularly require strength, thereby reducing the weight of the vibration direction changing portion.
  • an opening 520 is provided in the connecting portion 53B.
  • the weight reduction of the vibration direction converter is particularly effective in widening the reproduction characteristics and increasing the amplitude and sound pressure level of the sound wave for a predetermined audio current.
  • [Voice coil / Magnetic circuit] 15 to 21 are explanatory views showing a voice coil or a magnetic circuit of the speaker device according to the embodiment of the present invention.
  • the voice coil 30 is formed in a flat plate shape, includes a plurality of conductive members 31 that are continuous from one end to the other end, and a part of the plurality of conductive members 31 is arranged in the same direction and arranged in the magnetic path M. .
  • the voice coil 30 is formed in a flat plate shape with respect to the plurality of magnetic paths M, and has a plurality of linear conductive members 31 arranged in the magnetic path M, and has an annular shape.
  • the plurality of formed conductive members 31 are electrically connected.
  • Conductive members 31 a and 31 b wound in opposite directions are arranged side by side along the vibration direction (X-axis direction) of the voice coil 30.
  • the magnetic circuit 20 that forms the magnetic path M is configured to pass a magnetic flux in a direction penetrating the plane and in substantially the same direction through a portion of the linear conductive member 31 through which current flows in the same direction. .
  • the sound current is arranged so as to intersect with the vibration direction (X-axis direction) of the voice coil as shown by the arrows in the drawing, and part of the adjacent conductive members 31a and 31b. Are passing in approximately the same direction.
  • the conductive members 31a and 31b are integrally supported by an insulating voice coil support portion (base body) 40 having rigidity in at least the vibration direction (X-axis direction) of the voice coil.
  • the voice coil 30 itself may be rigid with respect to the vibration direction of the voice coil 30.
  • one end of one conductive member 31a is connected to the voice coil lead wire 32 (32a), and the other end of the conductive member 31a is connected to the other conductive member via the voice coil connection line 33.
  • One end of the member 31b is connected, and the other end of the conductive member 31b is connected to the voice coil lead wire 32 (32b). That is, the plurality of conductive members 31a and 31b wound in a coil shape are connected in series.
  • one end of the conductive member 31a and one end of the conductive member 31b are connected to one voice coil lead line 32 (32c), and the other end of the conductive member 31a and the other of the conductive member 31b.
  • One end is connected to one voice coil lead line 32 (32d). That is, the plurality of conductive members 31a and 31b wound in a coil shape are connected in parallel.
  • the conductive member 31a has a pair of linear portions 31a1 and 31a2 intersecting the vibration direction (X-axis direction) of the voice coil 30, and the conductive member 31b is a voice coil. It has a pair of linear portions 31b1 and 31b2 that intersect 30 vibration directions (X-axis direction). And each linear part 31a1, 31a2, 31b1, 31b2 is arrange
  • one end of one conductive member 31a is connected to the voice coil lead line 32 (32a), and the other end of the conductive member 31a is the voice coil.
  • the other end of the conductive member 31b is connected to one end of the other conductive member 31c via the connection line 33, and the other end of the conductive member 31b is connected to one end of the other conductive member 31c via the voice coil connection line 33.
  • the end is connected to the voice coil lead line 32 (32b). That is, the plurality of conductive members 31a, 31b, 31c wound in a coil shape are connected in series. Although an example in which three coils are connected is shown here, four or more coils can be similarly connected.
  • the voice coil 30 of such an embodiment when a voice current is passed between the voice coil lead lines 32, 32, a current in the same direction flows in the straight portions 31a2, 31b1. In the straight portions 31a1 and 31b2 facing the straight portions 31a2 and 31b1, a current flows in the opposite direction to the straight portions 31a2 and 31b1. Therefore, the direction of the linear portions 31a1, 31a2, 31b1, and 31b2 (Y-axis direction) with respect to the audio current flowing through the voice coil 30 by reversing the magnetic field direction of the magnetic path M by a pair of adjacent magnetic fields.
  • an electromagnetic force acts in a direction (X-axis direction) intersecting the magnetic field direction (Z-axis direction) of the magnetic path M, and the voice coil 30 vibrates along the electromagnetic force.
  • the electromagnetic force that vibrates the voice coil 30 can be increased by providing a plurality of conductive members 31a and 31b and arranging the linear portions 31a1, 31a2, 31b1, and 31b2 in substantially the same direction.
  • the winding directions of the conductive members 31a and 31b are opposite to each other. However, they may be wound in the same direction.
  • the input audio signal poles (+ pole, ⁇ One) can be a positive pole and the other can be a negative pole, and electromagnetic force in substantially the same direction can be generated in the conductive members 31a and 31b.
  • FIG. 16 is an explanatory view showing an example of how to wind the voice coil.
  • the conductive member 31 forming the voice coil 30 has a pair of linear portions through which current flows in the opposite direction through a pair of magnetic paths M having different magnetic field directions, and is arranged so as to circulate around the pair of magnetic paths M.
  • the voice coil 30 in which the conductive member 31 is wound in a planar manner is illustrated.
  • the voice coil 30 may be wound three-dimensionally.
  • the conductive member 31 may be wound with a different diameter from the center side to the outside and disposed between the two base bodies 41, 41.
  • FIG. The conductive member 31 wound in the same diameter may be laminated in the thickness direction of the base body 41.
  • the cross section of the conductive member 31 may be a rectangular or polygonal cross section as shown, or a circular or elliptical cross section.
  • the cross section of the conductive member 31 may be a rectangular or polygonal cross section as shown, or a circular or elliptical cross section.
  • FIG. 17 and 18 are explanatory views showing a configuration example of a voice coil having a laminated structure (FIG. 17A is a plan view, FIG. 18B is an AA cross-sectional view, and FIG. BB sectional view).
  • the voice coil 30 is formed in a plate shape with respect to the plurality of magnetic paths M, and a plurality of conductive members 31 are stacked along a direction intersecting the vibration direction (Z-axis direction) of the diaphragm.
  • the conductive member 31 is disposed in the magnetic path M.
  • a plurality of conductive members 31 are stacked via an insulating member 35 as shown in FIGS.
  • stacked on the multiple layers is the insulating member 35 in the direction where the multiple-layer conductive member 31 is laminated
  • the winding direction by the plurality of conductive members 31 stacked is substantially the same direction.
  • the conductive member 31 (31c) is wound in a plane so that one end of the straight portions 31c1 and 31c2 in the same direction is continuous, and the straight portions 31c1 and 31c2 have magnetic field directions opposite to each other. Arranged in the magnetic paths M and M, respectively.
  • the conductive member 31 (31d) is planarly formed so that the opposite ends of the straight portions 31d1 and 31d2 are continuous, and the straight portions 31d1 and 31d2 have the same magnetic field direction. M and M are respectively arranged.
  • the magnetic paths M and M are linear portions 31c1 and 31c2 extending along the direction intersecting the vibration direction of the voice coil 30 and the voice coil 30 in the conductive member 31 (31c). A part of the straight line portion extending along the vibration direction is covered. For this reason, a relatively large electromagnetic force can be efficiently generated in the voice coil 30 by the action of the magnetic flux passing through the magnetic path M. Further, if necessary, the magnetic paths M and M may cover the straight portions 31c1 and 31c2 excluding a part of the straight portion extending along the vibration direction of the voice coil 30.
  • a substrate used for a printed circuit board for example, a paper phenol substrate (paper impregnated with phenol resin), a paper epoxy substrate (paper impregnated with epoxy resin), glass Composite substrate (thin cut glass fibers stacked and impregnated with epoxy resin), glass epoxy substrate (sheets made of glass fiber cloth, woven fabric or non-woven fabric impregnated with epoxy resin) ), A Teflon substrate (a substrate formed of Teflon), an alumina substrate (a substrate formed of aluminum oxide), and a composite substrate (a substrate formed by sandwiching the above glass epoxy substrate with a paper epoxy substrate) are used. it can.
  • a paper phenol substrate paper impregnated with phenol resin
  • a paper epoxy substrate paper impregnated with epoxy resin
  • glass Composite substrate thin cut glass fibers stacked and impregnated with epoxy resin
  • glass epoxy substrate sheets made of glass fiber cloth, woven fabric or non-woven fabric impregnated with epoxy resin
  • a Teflon substrate a substrate formed of Teflon
  • the conductive member 31 constituting the voice coil 30 may be, for example, a conductive layer, a thin film, a metal foil or the like made of a metal member formed in a pattern on or inside the base body 41.
  • FIGS. 19 and 20 are explanatory views showing an example of forming a magnetic circuit that forms the magnetic path M passing through the voice coil 30.
  • FIG. The arrows in the figure indicate the magnetic field direction in the magnetic pole direction or magnetic gap of the magnet.
  • the magnetic circuit 20 includes a yoke portion 22 and a magnet 21, and has at least a pair of magnetic gaps 20G in which magnetic fields in opposite directions are formed.
  • the pair of magnetic gaps 20G extends in the vibration direction (X-axis direction) of the voice coil. Are arranged side by side.
  • the voice coil 30 has a pair of linear portions through which current flows in the reverse direction through the pair of magnetic gaps 20G, and is arranged so as to circulate through the pair of magnetic gaps 20G.
  • the magnets 21 constituting the pair of magnetic gaps 20G (20G1 and 20G2 or 20G2 and 20G3) are magnetized in opposite directions.
  • all of the magnetic gaps 20G (20G1, 20G2, 20G3) arranged side by side along the X-axis direction are formed between the magnets 21,21.
  • a voice coil 30 composed of a conductive member 31b is wound around a pair of magnetic gaps 20G1 and 20G2 in which magnetic fields in opposite directions are formed, and a pair of magnetic gaps 20G2 and 20G3 in which magnetic fields in opposite directions are formed.
  • a voice coil 30 made of a conductive member 31a is wound around.
  • a yoke part 22 and a yoke part 22 which are disposed opposite to each other across the voice coil 30 along the vibration direction (X-axis direction) of the voice coil 30 are joined to the yoke part 22.
  • a magnet 21 projecting toward the magnetic gap 20G is provided, and the magnetization direction of the magnet 21 is reversed for each magnetic gap 20G.
  • At least one of the pair of magnetic gaps 20G1, 20G2 or 20G2, 20G3 is formed between the yoke portions 22,22. Further, at least one of the pair of magnetic gaps 20G1, 20G2 or 20G2, 20G3 is formed between the two magnets 21,21.
  • a yoke portion 22 is provided opposite to both sides of the voice coil 30 along the vibration direction of the voice coil 30, and one of a pair of magnetic gaps 20G (20G1) is joined to the yoke portion 22.
  • 20G3 having projectingly arranged magnets 21 and 21, and convex portions 22a and 22b projecting the yoke portion 22 to form the other of the pair of magnetic gaps (20G2).
  • FIG. 5B a yoke portion 22 is provided opposite to both sides of the voice coil 30 along the vibration direction of the voice coil 30, and one of a pair of magnetic gaps 20G (20G1) is joined to the yoke portion 22.
  • 20G3 having projectingly arranged magnets 21 and 21, and convex portions 22a and
  • the yoke portion 22 has convex portions 22a and 22b, as in FIG. 5B.
  • the convex portions 22a and 22b are formed by bending a part of the yoke portion 22.
  • one of the pair of magnetic gaps 20G1 or 20G3 is formed between the pair of magnets 21 and 21, and the pair of magnetic gaps 22a and 22b has a pair of magnetic gaps.
  • the other (20G2) is formed.
  • the width of the magnetic gap 20G2 in the vibration direction of the voice coil 30 may be formed relatively large with respect to the magnetic gap 20G1 or 20G3, and may be changed according to the width of the conductive member 30 constituting the voice coil 30. It doesn't matter.
  • a magnetic gap 20G is formed between the magnet 21 and the yoke portion 22 or the convex portion 22a protruding from the yoke portion 22.
  • One of the pair of magnetic gaps is formed between the one magnet 21 and the yoke part 22, and the other of the pair of magnetic gaps 20 ⁇ / b> G is formed between the one convex part 22 a and the yoke part 22.
  • the yoke portion 22 and the magnet 21 joined to the yoke portion 22 are arranged on one side of the voice coil 30, and the magnet 21 has a magnetic gap 20 ⁇ / b> G (20 ⁇ / b> G ⁇ b> 1, 20 ⁇ / b> G ⁇ b> 1). 20G2, 20G3) facing one side.
  • the yoke part 22 is arrange
  • the magnetic gaps 20G1 and 20G3 are formed between the magnet 21 joined to the yoke portion 22 and the yoke portion 22, and the magnetic gap 20G2 is formed in the yoke portion 22. It is formed between the convex portion 22 a and the yoke portion 22.
  • a conductive member 31b is wound around a pair of magnetic gaps 20G1 and 20G2 in which magnetic fields in opposite directions are formed, and a pair of magnetic gaps 20G2 in which magnetic fields in opposite directions are formed.
  • a conductive member 31a is wound around 20G3. It should be noted that the width of the magnetic gap 20G2 in the vibration direction of the voice coil 30 may be formed relatively large with respect to the magnetic gap 20G1 or 20G3, and may be changed according to the width of the conductive member 30 constituting the voice coil 30. It doesn't matter.
  • the magnetic circuit 20 has a magnetic pole member arranged on one side of the space partitioned by the voice coil 30, and the magnetic pole member is in the vibration direction of the voice coil 30 (X-axis direction). ) Is magnetized.
  • the magnetic pole member including the magnet 21 and the yoke portion 22 is disposed only on one side of the voice coil 30, and the yoke is disposed so as to face the conductive members 31 a and 31 b of the voice coil 30.
  • a portion 22 is provided, and magnets 21 opposite to each other in the X-axis direction are disposed so as to sandwich the yoke portion 22.
  • the magnetic flux that exits from one yoke portion 22 and enters the other yoke portion 22 crosses the conductive members 31a and 31b of the voice coil 30, and the same magnetic field as the magnetic gap when the magnetic pole members are opposed to each other.
  • a path M is formed.
  • FIG. 20C the magnetic pole member including the magnet 21 and the yoke portion 22 is disposed only on one side of the voice coil 30, and the yoke is disposed so as to face the conductive members 31 a and 31 b of the voice coil 30.
  • a portion 22 is provided, and magnets 21 opposite to each other in the X-axis
  • the yoke portion 22 is disposed on one side of the voice coil 30 in the example of FIG. This also makes it possible to form a magnetic path M similar to that shown in FIG. 20C, and to concentrate the magnetic flux on the conductive members 31a and 31b.
  • the widths of the yoke portions 22 in the vibration direction of the voice coil 30 may be changed to different sizes as necessary.
  • the width of the yoke portion 22 facing the conductive member 31 disposed adjacent to the conductive members 31a and 31b is set to be the width of the yoke portion 22 facing the conductive member 31 positioned separately from the conductive members 31a and 31b. The case where it forms comparatively large with respect to is mentioned.
  • FIG. 21 is an explanatory view showing a holding form of the voice coil 30 as shown in FIG.
  • the voice coil 30 including the plurality of conductive members 31 a and 31 b is supported directly or by the voice coil support part 40 and is held by the stationary part via the holding part 15.
  • a plurality of holding portions 15 may be provided in the vibration direction of the voice coil 30 (three on each side in the illustrated example).
  • FIGS. 7B and 7C are cross-sectional views taken along the line AA in FIG. 9B
  • the voice coil support portion 40 along the vibration direction of the voice coil 30 (see FIG. A wall 401 extending toward the diaphragm 10 and the stationary part 100 may be provided at the edge of the base body.
  • the wall 401 at the edge of the voice coil support 40 (base)
  • the bending rigidity of the voice coil 30 can be improved and the vibration of the voice coil 30 can be efficiently transmitted to the diaphragm 10.
  • the above-described voice coil 30 has a plurality of conductive members 31 arranged side by side along the vibration direction of the voice coil 30.
  • the length of the conductive member 31 or the voice coil 30 in the direction orthogonal to the vibration direction of the voice coil 30 (hereinafter referred to as width) is relatively small.
  • the electromagnetic force acting on the voice coil 30 can be made substantially the same or relatively large.
  • a voice coil 30 including a planar shape in which a series resistance of the entire speaker device is constant, a square having one side L, and a conductive member 31 having a cross-sectional area S is used.
  • the electromagnetic force when the voice coil 30 is used is BLI and the sound pressure P.
  • the length of the conductive member 31 in the vibration direction of the voice coil 30 is referred to as the length of the conductive member 31, and the length orthogonal to the vibration direction of the voice coil 30 is referred to as the width of the conductive member 31.
  • the cross-sectional area of the conductive member 31 is substantially reduced. Is S, the electromagnetic force is BLI, and the sound pressure is P.
  • the conductive members 31 are connected in parallel, the cross-sectional area of the conductive member 31 is substantially S / 16, the electromagnetic force is BLI / 2, and the sound pressure is 8P. Therefore, even if the width of the conductive member 31 is relatively small, the sound pressure can be made substantially the same or relatively large by increasing the number of the conductive members 31 arranged along the vibration direction of the voice coil 30. it can. In addition, the sound pressure can be relatively increased while downsizing the speaker device.
  • FIGS. 11 and 12 are explanatory views showing a speaker device 1T according to an embodiment of the present invention
  • FIG. 22 is a plan view
  • FIG. 23 is a sectional view taken along line XX
  • FIG. 24 is a rear view
  • the example shown in FIGS. 11 and 12 is adopted as the vibration direction conversion unit 50.
  • the voice coil 30 has a laminated structure and includes a plurality of conductive members 31.
  • the diaphragm 10 is formed in a rectangular shape as viewed from the acoustic radiation direction, and has an elliptical outer shape in the vicinity of the center and a curved portion 10 ⁇ / b> A having a concave cross-sectional shape.
  • a predetermined bending rigidity is provided in the vibration direction of the diaphragm 10 and the vibration direction of the voice coil 30.
  • the concave curved portion 10A in the diaphragm 10 the density in the curved portion 10A becomes larger than the density in a part of the other diaphragm 10, and the rigidity can be relatively increased.
  • the bending portion 10 ⁇ / b> A is formed between the pair of joint portions 52 ⁇ / b> B formed between the vibration direction conversion unit 50 and the diaphragm 10. ing.
  • the vibration plate 10 Since the vibration plate 10 has rigidity (including bending rigidity) in the vibration direction of the vibration plate 10, the occurrence of deflection of the vibration plate 10 is suppressed, a phase difference is generated between sound waves, and divided vibration is generated. It is possible to suppress degradation of acoustic characteristics due to occurrence. Further, the bending portion 10 ⁇ / b> A is formed on the diaphragm 10 between the pair of joint portions 52 ⁇ / b> B formed between the diaphragm 10 and the vibration direction converter vibration direction converter 50. Can be deterred.
  • the diaphragm 10 is formed in a substantially rectangular shape having a short axis along the vibration direction of the voice coil 30 and a long axis along a direction orthogonal to the vibration direction of the voice coil 30.
  • a reinforcing portion (not shown) may be formed along the axial direction.
  • the reinforcing portion is, for example, a groove portion having a V-shaped cross section or other shape, and is formed in a linear shape, an annular shape, or a lattice shape with respect to the front surface or the back surface of the vibration plate 10.
  • a filler such as a dumping agent (damping agent, braking material) may be applied (applied).
  • the rigidity (including bending rigidity) of the diaphragm 10 can be improved, and the peak dip of the speaker sound pressure frequency characteristic can be reduced.
  • a fiber member (not shown) made of a nonwoven fabric or the like may be attached.
  • the rigidity (bending rigidity) of the diaphragm 10 can be improved by making the reinforcing part a fiber-based member, and when the diaphragm 10 vibrates, the vibration or air resistance propagates from the vibration direction changing part. It is possible to suppress deformation such as deflection in the diaphragm 10.
  • the internal loss of the diaphragm 10 can be improved by providing the reinforcing portion.
  • the diaphragm 10 is formed of a first layer made of a foamed resin made of an acrylic resin or the like and a second layer made of a fiber-based member such as glass fiber, and the first layer is It has a laminated structure sandwiched between a pair of second layers.
  • a material for forming the diaphragm 10 for example, a resin material, a metal material, a paper material, a fiber material, a ceramic material, a composite material, or the like can be used.
  • An edge 11 that supports the vibration plate 10 on the frame 12 that is the stationary portion 100 so as to freely vibrate is disposed between the vibration plate 10 and the frame 12, and an inner peripheral portion thereof supports an outer peripheral portion of the vibration plate 10, The outer peripheral portion is joined to the frame 12 directly or via another member, thereby holding the diaphragm 10 in a specified position.
  • the other member include an elastic member (including a resin member) having a function as a packing, an adhesive resin, and the like.
  • the edge 11 supports the diaphragm 10 so as to freely vibrate along the vibration direction (Z-axis direction) and brakes in a direction orthogonal to the vibration direction (Y-axis direction).
  • the edge 11 is formed in a ring shape (annular shape) as viewed from the acoustic radiation direction, and the cross-sectional shape thereof is a prescribed shape, for example, a concave shape, a convex shape, or a corrugated shape in the acoustic radiation direction.
  • a material for forming the edge 11 for example, a known material such as leather, cloth, rubber, resin, a material obtained by applying a sealing process thereto, or a member formed by molding rubber or resin into a specified shape may be used. it can.
  • a projection or a concave shape that protrudes toward the front surface (surface on the acoustic radiation side) or the back surface (surface on the opposite side to the acoustic radiation side) is formed on a part or the entire circumference of the edge 11, and the edge
  • the rigidity in the 11 prescribed directions may be improved.
  • the stationary part 100 is divided into a first frame 12B and a second frame 12C, and the diaphragm 10 is supported via an edge 11 in the central opening of the first frame 12B.
  • the magnetic circuit 20 is structured to be separable into a part arranged on the upper side with the voice coil 30 interposed therebetween and another part arranged on the lower side, and the upper part is supported by the first frame 12B.
  • the other part on the lower side is supported by the second frame 12C.
  • the upper yoke portion 22B is supported so as to be substantially parallel to the first frame 12B
  • the lower yoke portion 22A is substantially parallel to the second frame 12C.
  • the stationary portion 100 includes an outer peripheral frame portion 101 that surrounds the diaphragm 10 and a bridging portion 102 that bridges the inside of the outer peripheral frame portion 101.
  • the bridging portion 102 is connected to the link mechanism 50L (vibration direction converting portion 50) described above. A reaction force is applied and rigidity is provided in the vibration direction of the link mechanism 50L.
  • the link mechanism 50L that converts the angle of the link portion 51 is counteracted by the vibration from the diaphragm 10. Receive power.
  • the link mechanism 50L receives such a reaction force, the link mechanism 50L itself vibrates when the stationary portion 100 supporting the link mechanism 50L bends, and the link mechanism 50L transmits unnecessary vibration to the link portion 51. Will do. If unnecessary vibration transmitted to the link portion 51 is transmitted to the diaphragm 10, the vibration of the voice coil 30 cannot be efficiently transmitted to the diaphragm 10.
  • the compliance of the outer peripheral frame portion 101 is prevented.
  • the compliance of the bridging portion 102 is preferably substantially the same or small. More specifically, it is preferable that the thickness of the bridging portion 102 is substantially the same as or larger than the thickness of a part of the stationary portion 100 that supports the diaphragm 10 or the magnetic circuit 20.
  • the bridging portion 102 provided in the second frame 12C is formed with a first protruding portion 102A that protrudes in the extending direction and the vibration direction of the diaphragm 10.
  • the first protruding portion 102A has a rib structure formed along the longitudinal direction of the bridging portion 102, thereby increasing the bending rigidity of the bridging portion 102.
  • a second projecting portion 102 ⁇ / b> B extending in a direction intersecting with the first projecting portion 102 ⁇ / b> A is formed in the plane of the bridging portion 102 facing the diaphragm 10.
  • This 2nd protrusion part 102B becomes a reinforcement rib in the both ends of the bridge part 102, and the bridge part 102 is rigidly supported by the outer periphery frame part 101 at the both ends.
  • the bridging portion 102 has a third protrusion 102C extending in a direction intersecting the first protrusion 102A and the second protrusion 102B in the plane of the stationary portion 100 facing the diaphragm 10.
  • the reinforcement part 103 having a polygonal planar shape is formed by the plurality of second protrusions 102B and the third protrusions 102C.
  • the first frame 12B has the outer peripheral frame portion 101 of the stationary portion 100 as the first outer peripheral frame portion 101A, and the second outer peripheral portion 101B that supports the diaphragm 10 inside the first outer peripheral frame portion 101A. Prepare. The opening inside the second outer peripheral frame portion 101 ⁇ / b> B is blocked by the edge 11 and the diaphragm 10. On the second outer peripheral frame portion 101B where the diaphragm 10 is supported via the edge 11, a protruding portion 101B1 protruding toward the acoustic radiation direction is formed. The protrusion 101B1 obtains rigidity for supporting the periphery of the diaphragm 10.
  • the first frame 12B and the second frame 12C serving as the stationary part 100 have a planar shape having a major axis and a minor axis, and the bridging part 102 is formed along the minor axis direction. Further, the bridging portion 102 can be formed along the long axis direction, or can be formed along the long axis direction and the short axis direction, and the rigidity of the stationary portion 100 can be obtained.
  • Convex portions 100m are formed at the four corners of the first frame 12B, and concave portions 100n are formed at the four corners of the second frame 12C.
  • the convex portions 100m and the concave portions 100n are fitted, and the first frame 12B and the second frame 12C is coupled.
  • the convex portion 100m may be formed on one of the first frame 12B and the second frame 12C, and the concave portion 100n may be formed on the other of the first frame 12B and the second frame 12C.
  • the recess 100n may be formed as a hole.
  • the vibration direction converter 50 includes a first link portion 51A and a second link portion 51B as a link mechanism 50L, one end of the second link portion 51B is supported by the first link portion 51A, and the other end is Supported by the bridge 102.
  • the bridging portion 102 that supports the second link portion 51B is formed in a flat plate shape, and the connecting portion 104 that connects the other end of the second link portion 51B and the bridging portion 102 forms a single plane. ing.
  • the other end of the second link portion 51B is engaged with the bridging portion 102, so that the vibration direction changing portion 50 and the bridging portion 102 are connected.
  • a protruding portion 104A is formed on the connecting portion 104 of the bridging portion 102, and the protruding portion 104A is inserted into a connecting portion 53C formed integrally with the end portion of the second link portion 51B via the joint portion 52.
  • a hole 104B is formed.
  • the protruding portion 104A of the connecting portion 104 in the bridging portion 102 is a positioning portion that determines the position of the vibration direction changing portion 50 with respect to the stationary portion 100.
  • the protrusion 104A is inserted into the hole 104B of the connecting portion 53C that is integrally formed with the end portion of the second link portion 51B via the joint portion 52, so that the vibration direction changing portion 50 is moved with respect to the stationary portion 100. Positioning.
  • the second coupling portion 53B of the vibration direction changing unit 50 is coupled to the back surface of the diaphragm 10 supported by the first frame 12B.
  • An immovable connecting portion 53C of the vibration direction changing portion 50 is connected to a connecting portion 104 formed at the central portion of the bridging portion 102 in the second frame 12C.
  • the second connecting portion 53B is a portion integrated with the end portion of the first link portion 51A via the joint portion 52B.
  • the end of one link portion 51 ⁇ / b> A and the diaphragm 10 are connected.
  • a concave portion is formed on the surface of the diaphragm 10 facing the second coupling portion 53B on the acoustic radiation side, and the diaphragm 10 has rigidity.
  • the immovable connecting portion 53C is a portion integrated with the end of the second link portion 51B via a joint portion 52D, and a hole 104B is formed in the connecting portion 53C.
  • the protrusion 104A of the connecting portion 104 is inserted, and the connecting portion 104 and the end of the second link portion 51B are connected.
  • the voice coil support portion 40 on which the voice coil 30 is supported has a connection portion 60 attached to one end in the vibration direction, and the connection portion 60 is attached so as to extend along the width of the voice coil support portion 40.
  • the connection portion 60 is formed with a connection step portion 60s to which the first connection portion 53A of the vibration direction conversion portion 50 is detachably connected, and a through-hole penetrating along the vibration direction of the voice coil support portion 40. 60p is formed.
  • the through hole 60p is a vent hole formed to reduce the air resistance acting on the connecting part 60 against the vibration of the voice coil support part 40.
  • the connecting portion 60 connects the first connecting portion 53A of the vibration direction converting portion 50 and the end portion of the voice coil support portion 40 with a space therebetween, and thereby within the height of the vibration direction converting portion 50.
  • the height of the magnetic circuit 20 is adjusted.
  • the voice coil support part 40 and the connecting part 60 are held by the holding part 15 on the first frame 12B and the second frame 12C.
  • the holding unit 15 includes a first holding unit 15A and a second holding unit made of a curved plate member that allows deformation in one direction along the vibration direction of the voice coil support unit 40 and restricts deformation in the other direction. Part 15B.
  • the first holding portion 15A and the second holding portion 15B hold the voice coil 30 substantially symmetrically on the stationary portion 100 directly or via another member.
  • the mounting unit 16 The voice coil support portion 40 is held by the first frame 12B and the second frame 12C via the.
  • the first holding portion 15A is made of a conductive metal, and is electrically connected via a lead wire 31 drawn from the end of the voice coil 30 and a voice coil lead wire 32 (conductive layer 43). An audio signal is supplied to the voice coil 30 via the first holding unit 15A. Further, the first holding portion 15A is electrically connected to the linear terminal portions 81 and 81 supported by the frame 12, and the wiring 82 and the wiring 82 that are electrically connected to the terminal portions 81 and 81, respectively. And electrically connected to the outside.
  • the second holding portion 15B is disposed on the left and right sides of the voice coil 30 on the side opposite to the side connected to the connecting portion 60 of the voice coil 30, and the central portion thereof is the other of the mounting unit 16 (stationary portion). It is connected to the side part, and both ends thereof are connected to the left and right ends of the voice coil support part 40 (voice coil 30).
  • the second holding portion 15 ⁇ / b> B is arranged within the width of the voice coil support portion 40 so that the holding mechanism of the voice coil support portion 40 is not bulky in the width direction of the whistle coil support portion 40.
  • the second holding portion 15B is formed of a continuous member, the second holding portion 15B has a continuous shape even in the central portion, but may be formed of a plurality of members and is not particularly limited. Note that a part of the second holding portion 15B is disposed so as to protrude outward from the stationary portion 100. However, the second retaining portion 15B is not limited thereto, and may be changed so as to be accommodated in the stationary portion 100.
  • the voice coils 30 and 30 In order to input voice signals to the voice coils 30 and 30 corresponding to the plurality of driving units 14, the voice coils 30 and 30 extend from one voice coil 30 toward the other voice coil 30, A pair of common terminal portions 81, 81 for the voice coils 30, 30 are provided on the stationary portion 100.
  • the terminal portions 81 and 81 are arranged inside an opening (not shown) formed between the first frame 12B and the second frame 12C constituting the frame 12 which is the stationary portion 100. Has been. For this reason, compared with the case where the terminal portions are provided at one end and the other end of each voice coil 30, the arrangement of the terminal portions can be saved, and the speaker device can be reduced in size or thickness.
  • terminal parts 81 and 81 can be stably fixed to the stationary part 100, and poor connection with the voice coils 30 and 30 can be avoided.
  • the terminal portions 81 and 81 are formed in a shape having a long axis extending from one voice coil 30 to the other voice coil 30 and a short axis intersecting the long axis. Thus, by making it elongate shape, the efficiency of installation space can be improved.
  • the terminal portions 81 and 81 are formed with connection portions 81a for wirings 82 and 82 (second wiring) electrically connected to the outside, and are electrically connected to the terminal portions 81 and 81 at the connection portion 81a.
  • the wiring 82 (second wiring) is fixed to the side surface of the stationary portion 100 and is connected to the terminal portions 81 and 81.
  • the outer peripheral frame portion 101 of the stationary portion 100 includes a side surface to which the wiring 82 is attached.
  • Guide portions 106 and 106 that guide the wiring 82 are formed on the side surface of the stationary portion 100.
  • a voice coil lead wire 32 (conductive layer 43) connected to a lead wire 31 drawn from the end of the voice coil 30 is formed on the voice coil support portion 40 (base) that supports the voice coil 30. ing.
  • the conductive layer 43 is patterned on the voice coil support portion 40 (base) so as to surround the conductive member that is the voice coil 30, and the conductive layer 43 electrically connects the conductive member of the voice coil 30 and the holding portion 15. Connected.
  • the holding portion 15 is formed with wiring for electrically connecting the voice coil 30 and the terminal portion 81, and the end portions of the terminal portions 81 and 81 are electrically connected with the wiring of the holding portion 15. And the voice coil lead line are connected, and the wiring 82 is connected to the terminal portions 81, 81, whereby a voice signal is input to the voice coil 30 from the outside.
  • connection part F1 connected to the terminal parts 81 and 81 is formed in the holding part 15.
  • the connecting portion F1 extends in a direction intersecting the vibration direction (X-axis direction) of the diaphragm 10 and is formed in a flat plate shape so as to contact the terminal portions 81 and 81.
  • the holding portion 15 is also formed with a connection portion F ⁇ b> 2 connected to the voice coil lead wire 32, extends in a direction intersecting with the vibration direction (Z-axis direction) of the diaphragm 10, and the voice coil lead wire 32. It is formed in a flat plate shape so as to come into contact with the end of the plate.
  • the attachment unit 16 includes a first connection portion 16a to which the end portion of the first holding portion 15A is connected on both the left and right sides of the connecting portion 60, and a second connection portion to which the second holding portion 15B is connected.
  • 16b is provided behind the voice coil support portion 40, and has an integrated support portion 16c that integrally supports the first connection portion 16a and the second connection portion 16b.
  • the four corners of the mounting unit 16 are provided with connection hole portions 16d facing the convex portions 100m provided in the first frame 12B of the stationary portion 100.
  • the unit 16 is integrated, and an upper yoke portion 22B and a lower yoke portion 22A of the magnetic circuit 20 are respectively disposed above and below these (voice coil support portion 40 and the like), and the first frame 12B of the stationary portion 100
  • the second frame 12C is sandwiched.
  • the immovable connecting portion 53C of the vibration direction changing portion 50 is fitted to the support base 12D formed on the bottom portion 12A of the second frame 12C and is immovably supported, and other components such as the mounting unit 16 are also first. It is positioned at a predetermined position with respect to the first frame 12B and the second frame 12C. Further, by inserting the convex portions 100 m included in the first frame 12 ⁇ / b> B of the stationary portion 100 into the connection hole portions 16 d provided at the four corners of the mounting unit 16, the stationary portion 100 is fixed at a predetermined position.
  • the yoke portion 22B on the upper side of the magnetic circuit 20 is first assembled with respect to the inner surface of the first frame 12B, and then the mounting unit 16, the vibration direction converting portion 50, etc. are sequentially assembled and positioned, and The second frame 12C is overlapped to sandwich each component, and the lower yoke portion 22A of the magnetic circuit 20 is incorporated. Finally, the second connecting portion 53B of the vibration direction changing portion 50 and the diaphragm 10 are joined with an adhesive as a joining member, and the outer peripheral portion of the diaphragm 10 is connected to the first frame 12B via the edge 11. To the second outer frame portion 101B.
  • a groove is formed in the bottom portion of the second outer frame portion 101B to accommodate the protrusion of the adhesive using the edge 11 and the first frame 12B as a joining member. It is formed as a joining member accommodating part. Further, by forming a projecting portion that projects the outer peripheral portion of the edge 11 toward the frame 12B and allowing the projecting portion to enter the groove portion, the bonding force between the edge 11 and the first frame 12B can be improved.
  • the assembly process may be as follows. First, the wiring 82 is connected to the connection terminals 81, 81, and the magnet 21 is joined to the yoke portion 22. Next, the connection terminals 81 and 81 to which the wiring 82 is connected are attached to the outer peripheral frame portion 101A of the first frame 12B. Next, the pair of attachment units 16 to which the above-described voice coil 30 is attached are attached to the first frame 12B. At this time, the connection terminals 81, 81 and the holding portion 15A attached to the attachment unit 16 are electrically connected using solder or the like. Next, the vibration direction conversion unit 50 is attached to the connecting unit 104 and the vibration direction conversion unit 50 and the voice coil 30 are connected.
  • the second frame 12C is disposed on the first frame 12B, and a magnetic pole member (yoke part) 22 having a magnet 21 bonded thereto is attached to the outer peripheral frame part 101A of the second frame 12C.
  • the diaphragm 10 and the edge 11 are attached to the second outer peripheral frame portion 101B of the first frame 12B.
  • a magnetic pole member (yoke part) 22 in which a magnet 21 is joined is attached to the first outer peripheral frame part 101A of the first frame 12B.
  • the wiring 82 is attached to the guide portion 106 provided in the first outer peripheral frame portion 101A of the first frame 12B.
  • the frame 12 serving as the stationary part 100 includes the first frame (first constituent member) 12B and the second frame (second constituent member) 12C, and the first frame 12B is the sound of the speaker device 1T.
  • the second frame 12C is disposed on the side opposite to the acoustic radiation side (back side).
  • the drive unit 14 of the speaker device 1 is supported so as to be sandwiched between the first frame 12B and the second frame 12C.
  • the outer peripheral frame portion 101 formed in an annular shape included in the first frame 12B supports one side (22B) of the magnetic pole member (yoke portion) 22 of the magnetic circuit 20.
  • the second frame 12C includes an outer peripheral frame portion 101 and a bridging portion 102 and supports one side (22A) of the magnetic pole member (yoke portion) 22 of the magnetic circuit 20.
  • the first frame 12B and the second frame 12C include a concave receiving portion 105 that accommodates a part of the yoke portion 22.
  • a protrusion 22p is fitted into the receiving portion 105, and the yoke portion 22 is positioned in order to form an appropriate magnetic gap.
  • an opening 101S is formed between the outer peripheral frame portion 101 and the bridging portion 102 in the second frame 12C.
  • the outer peripheral frame portion 101 is formed with a fourth protrusion (not shown) along the outer peripheral edge of the opening 101S. The fourth protrusion increases the torsional rigidity of the outer peripheral frame portion 101.
  • an excessive vibration suppression unit 108 for suppressing excessive vibration of the voice coil 30 is formed in the first frame 12B.
  • the excessive vibration suppression unit 108 protrudes into the movable region of the voice coil 30, and the excessive vibration of the voice coil 30 is suppressed when the voice coil support unit 40 hits the excessive vibration suppression unit 108.
  • a cutout portion 41f is formed in the base of the voice coil support portion 40, and a protruding portion of the excessive vibration suppression portion 108 is disposed in the cutout portion 41f (see FIG. 27).
  • the magnetic circuit 20 is mounted on the first frame 12B and the second frame 12C with the magnetic pole member 22 joined to the magnet.
  • the magnetic pole member 22 includes a plurality of protrusions 22p, and the protrusions 22p are supported by the receiving portion 105.
  • the yoke portion 22, which is a plate-like magnetic body, has a width that decreases from the vibration direction changing portion 50 to the stationary portion 100, thereby preventing the holding portion 15 from contacting the yoke portion 22. .
  • the yoke portions 22A and 22B are attached to the first frame 12B and the second frame 12C, and the first frame 12B and the second frame 12C are coupled to each other, so that the yoke 21A and 22B are coupled to each other or the magnet 21. Is provided with a gap as a magnetic gap 20G.
  • FIG. 26 is an explanatory diagram for explaining the connection between the holding unit 15 and the attachment unit 16.
  • the second holding portion 15B which is an integral part, and the attachment unit 16 are connected via an adhesive resin.
  • the flat plate portions F, F at the left and right ends of the second holding portion 15B are connected to the connecting portions 40g, 40g at the left and right ends of the edge 40f1 via connecting parts 40g1, 40g1 having holes 40g2, respectively.
  • the flat plate portion F at the center of 15B is coupled to the coupling end portion 16f1 of the attachment unit 16. Note that the edge 40f1 of the voice coil support 40 on the side opposite to the vibration direction changer side of the voice coil support 40 is formed in a concave shape on the voice coil 30 side.
  • the voice coil support portion 40 is formed in a planar shape that can prevent the coil support portion 40 from vibrating and coming into contact with the mounting unit 16. Specifically, a relatively large gap is formed between the connecting end portion 16f1 of the mounting unit 16 and the end edge 40f1 of the voice coil support portion 40, and the flat portion F side on the left and right ends of the second holding portion 15B. As it moves to, it becomes the planar shape which protrudes toward the 2nd holding
  • the flat portions F at the left and right ends of the second holding portion 15B are formed with hole portions F0 into which the connection portions 40g at the left and right ends of the other side edge 40f1 of the voice coil support portion 40 are inserted.
  • FIG. 27 is an enlarged view showing the electrical connection structure of the holding portion.
  • FIG. 4A shows in detail that one connection surface F2 of the first holding portion 15A is connected to the connection terminal portion 42 of the voice coil lead wire 32 (conductive layer).
  • FIG. 2B shows in detail the other connecting surface F1 of the first holding portion 15A connected to the terminal portion 81.
  • connection surface F1 on one end side is connected to the terminal portion 81, and the connection surface F2 on the other end side is connected to the connection terminal 42 of the voice coil lead line 32.
  • the terminal portion 81 electrically connects one end side of the pair of first holding portions 15A to the wiring 82 (external), and an audio signal input from the wiring 82 passes through the terminal portion 81 and the first holding portion 15A.
  • the terminal portion 81 is a rod-shaped conductive member, and a positioning hole is formed. By positioning a positioning projection 111 provided on the stationary portion 100 into the positioning hole, the terminal portion 81 is positioned at a specific location in the stationary portion 100.
  • the terminal portion 81 is configured by a member (insulating member) having insulation properties such as a resin member, and a conductive member is provided on the insulating member to be electrically connected to the connection surface F1 of the holding portion 15. It doesn't matter.
  • the height of the magnetic circuit 20 is almost the entire height of the entire apparatus, and the voice coil support portion 40 vibrates in the vicinity of the center of the magnetic circuit 20.
  • the part 40f and the end of the vibration direction changing part 50 are connected to each other at different heights via the connecting part 60.
  • each link portion of the vibration direction conversion unit 50 can ensure a sufficient length within the height of the device, and a part of the height of the magnetic circuit 20 is set to the height of the vibration direction conversion unit 50. It is possible to fit in.
  • a gap is formed between the first frame 12B and the upper yoke portion 22B disposed in the vicinity of the first frame 12B, the vibration of the diaphragm 10 is transmitted via the upper yoke portion 22B. Propagation to the magnetic circuit 20 is prevented from inducing contact between the magnetic circuit 20 and the voice coil 30.
  • FIG. 28 is an explanatory view showing another embodiment of the present invention.
  • a plurality of conductive members 31 are provided by arranging a plurality of conductive members 31 in the vibration direction (X-axis direction) of the voice coil 30. Since the other structure is the same as that of the above-mentioned embodiment, the same reference numerals are given and the duplicate description is omitted.
  • the plurality of conductive members 31 in the vibration direction in this way, as described above, even if the width of the conductive member 31 is relatively small, the sound pressure can be substantially the same or relatively large. . In addition, the sound pressure can be relatively increased while downsizing the speaker device.
  • the speaker device according to the embodiment or examples of the present invention can be reduced in thickness and can be increased in volume.
  • a thin speaker device capable of emitting a large volume of reproduced sound with a relatively simple structure can be obtained by vibrating the diaphragm in a direction different from the vibration direction of the voice coil.
  • the joint portion of the link mechanism needs to be durable enough to withstand the high-speed repeated vibration required for the speaker device.
  • the joint portion of the link mechanism can have durability and flexibility.
  • the link mechanism itself needs to be lightweight. Furthermore, there may be a need for ease of work when such a link mechanism is incorporated into the speaker device and ease of manufacture when the link mechanism itself is manufactured. With the configuration of the speaker device described above, weight reduction and manufacturability are possible.
  • FIG. 29 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 the mobile phone or the portable information terminal shown in FIG. 5A, or the electronic device 3 such as the flat panel display shown in FIG.
  • the speaker device 1 is housed in the housing or the speaker device 1 is attached to the side surface of the housing as a member to be attached to the electronic device, the thickness space necessary for installing the speaker device 1 can be reduced. The overall thickness can be reduced. In addition, sufficient audio output can be obtained even in a thin electronic device.
  • FIG. 30 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 attached to a door panel or ceiling as a member to be attached, the protrusion of the door panel or ceiling can be made relatively small, and the driver's operation space can be expanded and the indoor space can be expanded. It becomes possible to do.
  • sufficient sound 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.
  • facilities, etc. buildings
  • the speaker device 1 when the speaker device 1 is installed on a wall or ceiling as a member to be attached, the thickness space required for the installation of the speaker device 1 can be reduced, so unnecessary space in the room can be deleted, 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.
  • positioning location of the speaker apparatus 1, the ceiling, wall, etc. (attachment member) in a living room are mentioned, for example.

Abstract

L'invention concerne un dispositif haut-parleur doté d'une bobine acoustique (30) formée plate et entraînée dans la direction de la surface plate, la bobine acoustique est entraînée par une force électromagnétique suffisante. Un dispositif haut-parleur est doté d'une plaque de vibration (10), d'une section fixe (100) destinée à supporter la plaque de vibration de façon que celle-ci puisse vibrer dans la direction de vibration, et d'une section entraînement (14) fournie à la section fixe et appliquant la vibration à la plaque de vibration au moyen d'un signal audio. La section entraînement est pourvue d'une bobine acoustique (30) qui vibre dans une direction différente de la direction de vibration de la plaque de vibration par un signal audio entré dans la bobine acoustique, d'un circuit magnétique (20) destiné à former des chemins magnétiques (M) traversant la bobine acoustique, et d'une section de changement de direction de vibration rigide (50) destinée à transmettre une vibration de la bobine acoustique à la plaque de vibration après changement de direction de la vibration. Le circuit magnétique a les chemins magnétiques, la bobine acoustique est formée plate et est pourvue d'éléments conducteurs d'électricité (31a, 31b) en continu d'une extrémité à une autre de celle-ci, et certains de ces éléments sont montés dans les chemins magnétiques de manière à être disposer côte à côte dans la même direction.
PCT/JP2009/063409 2009-07-28 2009-07-28 Dispositif haut-parleur WO2011013198A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/063409 WO2011013198A1 (fr) 2009-07-28 2009-07-28 Dispositif haut-parleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/063409 WO2011013198A1 (fr) 2009-07-28 2009-07-28 Dispositif haut-parleur

Publications (1)

Publication Number Publication Date
WO2011013198A1 true WO2011013198A1 (fr) 2011-02-03

Family

ID=43528875

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/063409 WO2011013198A1 (fr) 2009-07-28 2009-07-28 Dispositif haut-parleur

Country Status (1)

Country Link
WO (1) WO2011013198A1 (fr)

Citations (2)

* 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
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 (2)

* 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
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

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