JPWO2011004480A1 - Magnetic circuit for speaker device and speaker device - Google Patents

Abstract

A thin magnetic circuit for driving a planar voice coil that can achieve a thin speaker device is obtained. The speaker circuit magnetic circuit (20) includes a plurality of magnetic gaps (20G) arranged in the vibration direction of the voice coil (30), and the magnetic pole surface on one side partitioned by the voice coils facing the plurality of magnetic gaps is a magnet. A first magnetic pole surface (20X) made of a magnetic material including (21) and a second magnetic pole surface (20Y) made of a plate-like magnetic material magnetically bonded to the magnet, The first magnetic pole surface and the second magnetic pole surface are substantially the same by forming the first magnetic pole surface and the second magnetic pole surface in a stepped shape. Height.

Description

  The present invention relates to a magnetic circuit for a speaker device and a speaker device.

  A dynamic speaker device is known as a general speaker device (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. In this speaker device, when a voice signal is input to the voice coil 611J, 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.

JP-A-8-149596 (FIG. 1)

  For example, as shown in FIG. 1, 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. In such a speaker device, 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 along the vibration direction (acoustic radiation direction) of the diaphragm 21J. As a result, the overall height of the speaker device must be relatively large.

  Specifically, as shown in FIG. 1, 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 total height (a) of the edge 4J, the voice coil bobbin height (b) from the joint between the diaphragm 21J and the voice coil bobbin 610J to the upper end of the voice coil 611J, the total height (c) of the voice coil, and the lower end of the voice coil 611J 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. In such a speaker device, in order to ensure a sufficient vibration stroke of the diaphragm 21J, it is necessary to sufficiently secure the heights a, b, c, d described above, and a sufficient driving force is provided. In order to obtain it, it is necessary to sufficiently secure the heights of c, d, and e described above, and therefore, especially in a loudspeaker type speaker device, the overall height of the speaker device must be large.

  Thus, in the conventional speaker device, since 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.

  As a means for solving this problem, it is conceivable to change the direction of vibration of the voice coil to a direction different from the direction of vibration of the diaphragm, and mechanically change the direction of the vibration of the voice coil and transmit it to the diaphragm. If this is realized, even if the vibration stroke of the voice coil is increased, this does not directly affect the thickness of the speaker device, and a thin speaker device can be realized. In order to achieve this and obtain a thin speaker device, it becomes a problem how to flatten the drive system including the magnetic circuit. If the cylindrical voice coil bobbin as in the prior art is simply tilted in a direction different from the vibration direction of the diaphragm, the thickness of the magnetic circuit increases and the thinning cannot be realized. There is a demand for a magnetic circuit in which the voice coil itself is planar, the voice coil is reciprocally oscillated in a planar manner, and the thickness thereof is reduced.

  This invention makes it an example of a subject to cope with such a problem. That is, it is possible to provide a thin speaker device that can emit a large volume of reproduction sound with a relatively simple structure, a flat voice coil that can achieve a thin speaker device, and a thin voice device that drives the voice coil It is an object of the present invention to obtain an improved magnetic circuit.

  In order to achieve such an object, the speaker device according to the present invention includes at least the configuration according to the following independent claims.

  [Claim 1] A magnetic circuit for a speaker device that is used in a speaker device that transmits vibration of a planar voice coil to a diaphragm via a rigid vibration direction converter, and that vibrates the voice coil in a plane. A first magnetic pole comprising a plurality of magnetic gaps arranged in a vibration direction of the voice coil, and a magnetic pole surface on one side partitioned by the voice coil facing the plurality of magnetic gaps is made of a magnetic material including a magnet And a second magnetic pole surface composed of a plate-like magnetic body magnetically joined to the magnet, and the plate-like magnetic body includes the magnetic body forming the first magnetic pole surface; And the second magnetic pole surface are formed in a stepped shape so that the first magnetic pole surface and the second magnetic pole surface have substantially the same height. circuit.

It is explanatory drawing of a prior art. It is explanatory drawing which showed the basic composition of the speaker apparatus based on embodiment of this invention (the figure (a) is sectional drawing along the X-axis direction, the figure (b) is explanatory drawing which showed operation | movement of the drive part. ). It is explanatory drawing explaining the structural example and operation | movement of a vibration direction conversion part. It is explanatory drawing explaining the structural example and operation | movement of a vibration direction conversion part. It is explanatory drawing which shows the example of formation of a vibration direction conversion part (FIG. 5 (a) is a side view, FIG.5 (b) is a perspective view, FIG.5 (c) is an A section enlarged view). It is explanatory drawing which shows the example of formation of a vibration direction conversion part. It is explanatory drawing which showed the speaker apparatus which employ | adopted the vibration direction conversion part (the figure (a) is sectional drawing along the X-axis direction, the figure (b) is explanatory drawing which showed operation | movement of the drive part). It is explanatory drawing which showed the speaker apparatus which employ | adopted the vibration direction conversion part (the figure (a) is sectional drawing along the X-axis direction, the figure (b) is explanatory drawing which showed operation | movement of the drive part). It is explanatory drawing which shows a specific vibration direction conversion part. It is explanatory drawing which shows a specific vibration direction conversion part. It is explanatory drawing which shows the other example of a vibration direction conversion part. It is explanatory drawing which shows the other example of a vibration direction conversion part. It is explanatory drawing which shows the other example of a vibration direction conversion part. It is explanatory drawing which shows the other example of a vibration direction conversion part. It is explanatory drawing which showed the magnetic circuit for speaker apparatuses which concerns on embodiment of this invention. It is explanatory drawing which showed the magnetic circuit for speaker apparatuses which concerns on embodiment of this invention. It is explanatory drawing which showed the Example of this invention. It is explanatory drawing which showed the Example of this invention. It is explanatory drawing which showed the Example of this invention. It is explanatory drawing which showed the Example of this invention. It is explanatory drawing which showed the Example of this invention. It is explanatory drawing which showed the Example of this invention. It is explanatory drawing which showed the Example of this invention. It is explanatory drawing which showed the Example of this invention. It is explanatory drawing which showed the Example of this invention. It is explanatory drawing which showed the Example of this invention. It is explanatory drawing which showed the modification of this invention. It is explanatory drawing which showed the electronic device provided with the speaker apparatus which concerns on embodiment of this invention. It is explanatory drawing which showed the motor vehicle provided with the speaker which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiment of the present invention includes the contents shown in the drawings, but is not limited thereto. In the following description of each drawing, parts that are common to the parts that have already been described are assigned the same reference numerals, and duplicate descriptions are partially omitted. Further, the magnetic circuit as the best mode for carrying out the invention is shown in FIG. 15, which will be described later. For example, FIG. 2 shows a different magnetic circuit for the sake of easy understanding. Is the same.

[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. In the drawing, 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. Here, 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, or may have a circular shape, an elliptical shape, or other shapes. Moreover, 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. In the illustrated example, the cross-sectional shape of the diaphragm 10 is a plane, but may be a curved shape. Moreover, if necessary, 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 diaphragm 10 and the driving part 14. Here, the stationary part 100 includes a frame 12, a yoke part that also functions as the frame 12, and a mounting unit, which will 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. In the illustrated example, 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. Here, 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. By arranging the voice coil 30 around which the conductive member is wound so that currents in opposite directions (± Y-axis direction) flow with respect to 20G, a direction along the magnetic gap 20G (± X-axis) is arranged in the voice coil 30. Direction) driving force (Lorentz force, electromagnetic 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.
The flat insulating member serving as the voice coil support portion 40 has a plurality of conductive layers formed on the outer side of the conducting wire. This conductive layer (voice coil lead wire) 32 (see FIG. 21) is electrically connected to a lead wire 31 (see FIG. 21) drawn from the start point and end point of the conducting wire. This lead line 31 (refer FIG. 21) is comprised by a part of electrically-conductive member mentioned later, for example. Further, it is electrically connected to the outside via a holding unit 15 (see FIG. 21) described later, and functions as a relay line for inputting a voice signal from the outside to the voice coil 30. In addition, for example, when a lead wire that is separated from the voice coil is routed in the speaker device as a relay wire, a space for routing the wiring is required separately. However, by forming the conductive layer (voice coil lead wire) 32 (see FIG. 21) as a relay line on the surface of the voice coil support section 40, it is not necessary to secure a space for the relay line, and the speaker device Thinning can be achieved.
In the illustrated example, 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. In addition, when the voice coil 30 or the voice coil support portion 40 that supports the voice coil 30 has 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. Have For example, 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 is relatively large when driving the speaker by making the length of the voice coil in the direction orthogonal to the vibration direction of the voice coil 30 relatively large compared to the length of the voice coil 30 in the vibration direction. A 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. In the illustrated example, 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. Moreover, the connection part 60 absorbs the thickness of the magnetic circuit 20, and is aiming at thickness reduction of a speaker apparatus.

  Furthermore, 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 conversion portion 50. The contact avoiding portion 70 also functions as a joining member restraining portion that 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. In the illustrated example, 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). Thereby, when the connection part 53 of the vibration direction conversion part 50 and the end surface of the connection part 60 or the diaphragm 10 are bonded together with a bonding member such as an adhesive or a double-sided tape, the adhesive protrudes toward the joint part 52. In addition, 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.

  As shown in FIG. 6A, 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. As a result, 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.

  According to such a speaker device 1, since the vibration direction of the voice coil 30 and the vibration direction of the diaphragm 10 are made different by the vibration direction conversion unit 50, the voice coil 30 is moved along the vibration direction of the diaphragm 10. Compared to the case of vibrating, 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.

  Furthermore, since the vibration of the voice coil 30 is redirected by the vibration direction converter 50 and transmitted to the diaphragm 10, 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 (the overall height of the speaker device) does not increase. This makes it possible to obtain a thin speaker device that can emit a large volume of reproduced sound.

  Further, when connecting the connecting portion 53 of the vibration direction changing portion 50 and the attached member 200 using an adhesive as a joining member, the adhesive diffuses and extends with the joining and protrudes toward the joint portion 52. When an adhesive adheres to the joint portion 52, the joint portion 52 may harden and become unable to move. Further, even when a double-sided tape is used as a joining member, if the end of the double-sided tape protrudes toward the joint portion 52 and the double-sided tape adheres to the joint portion 52, 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. When the joint portion 52 is broken in this way, 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. On the other hand, if the application amount of the adhesive or the bonding area by the double-sided tape is reduced so that the end of the adhesive or the double-sided tape does not stick out and adhere to the joint portion 52, 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. Further, since 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. Further, even if 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.

[Vibration direction conversion unit; FIGS. 3 to 14]
3 and 4 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. Here, 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. Here, 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.

  In the embodiment shown in FIG. 3, 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. As the other member, a known member can be used. For example, 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). 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 θ ₀ between the voice coil 30 (or the voice coil support portion 40) and the diaphragm 10. At this time, 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).

As shown in FIG. (B), when the moving is formed at the end of the voice coil 30 joint portion 52A from the initial position X ₀ to the vibration direction (X axis direction) by [Delta] X ₁ reaches the position X ₁ The inclination angle of the link part 51 is converted to θ ₁ (θ ₀ > θ ₁ ), and the position of the joint part 52B on the diaphragm 10 side moves by ΔZ _{1 in} the vibration direction (Z-axis direction) of the diaphragm 10. To reach position Z ₁ . That is, the diaphragm 10 is pushed up along the vibration direction by ΔZ ₁ .

As shown in FIG. (C), the position X ₂ moves is formed in an 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 part 51 is converted to θ ₂ (θ ₀ <θ ₂ ), and the position of the joint part 52B on the diaphragm 10 side is ΔZ _{2 in} the vibration direction (−Z axis direction) of the diaphragm 10. move and reaches the position Z _2. That is, the diaphragm 10 is pushed down along the vibration direction by ΔZ ₂ .

  As described above, the function of the vibration direction conversion unit 50 including the link part 51 and the joint part 52 (52A, 52B) 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 unit 50 has a function of converting the angle by receiving a reaction force from the stationary unit 100 such as the frame 12 where the link portion 51 is located on the opposite side to the diaphragm side. Specifically, 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. More specifically, 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.

In the vibration direction conversion unit 50, 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. As a result, when the voice coil 30 (or the voice coil support section 40) is moved by ΔX _{1 in the} X-axis direction from the reference position X ₀ , as shown in FIG. 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. Is pushed up by ΔZ _{1 in the} Z-axis direction. When the voice coil 30 moves from the reference position X ₀ by ΔX _{2 in the} direction opposite to the X axis, as shown in FIG. 4C, the angles of the first link portion 51A and the second link portion 51B are almost equal. will be lowered the same angle, the joint portion 52B is reliably diaphragm 10 receives a reaction force from the stationary portion 100 at the joint portion 52D from the reference position Z ₀ and Z axis depressing the opposite direction by [Delta] Z _2.

  Here, the length a of the link part from the joint part 52A to the joint part 52C, the length b of the link part from the joint part 52C to the joint part 52B, and the length c of the link part from the joint part 52C to the joint part 52D. Are substantially equal, and the joint portion 52A and the joint portion 52D are preferably disposed substantially parallel to the moving direction of the voice coil 30. Such a link mechanism is known as a Scott Russell mechanism, and the joint portions 52A, 52B, and 52D are located on the circumference of the length of the first link portion 51A (a + b = 2a) around the joint portion 52C. It is in. That is, 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. Thus, when the voice coil 30 is moved in the X-axis direction, 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.

  5 and 6 are explanatory views showing an example of formation of the vibration direction converting portion 50 (FIG. 5A is a side view, FIG. 5B is a perspective view, and FIG. 5C is an enlarged view of the A portion. ). As described above, the vibration direction converter 50 includes the link portion 51 and joint portions 52 (52A, 52B) formed at both ends thereof. In the illustrated example, 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. Here, 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.

  In the vibration direction conversion unit 50, 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. It is formed of a refractory continuous member that is continuous at both sides of the straddle. Here, 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. By providing such a second connecting portion 53B so that the link portion 51 supports the diaphragm 10 in a wide range, the diaphragm 10 can be vibrated in the same phase. The refraction here includes conceptually bending.

  When the vibration direction conversion unit 50 is formed of a plate-like member, 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.

  In addition, 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 ends of both sides straddling 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.

  Further, at the end portion of the connecting portion 60 that becomes the attached member 200 disposed in the vicinity of the joint portion 52A, the contact avoiding portion 70 is a recess or notch 71, and in the example shown in FIG. By forming an inclined notch, a space is formed between the joint portion 52A and the connecting portion 60. Further, 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. Thereby, contact with joint part 52A, 52B and to-be-attached member 200 can be suppressed. Further, when the first connecting portion 53A and the end surface of the connecting portion 60 of the link portion 51 and the second connecting portion 53B and the diaphragm 10 are bonded together with an adhesive as a joining member, 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.

  In the example shown in FIG. 6, 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. In the example shown in FIG. 5A, 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. According to this, 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. On the other hand, 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.

  In the example shown in FIG. 6B, 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. In the example shown in FIG. 5C, 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 that is repeated when the speaker device is driven, and flexible so that no sound is emitted when the refraction operation is repeated. As a specific example, the continuous member 50P can be formed of a woven or non-woven fabric of high-strength fibers. Examples of 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. Can be triaxial, tetraaxial weave, triaxial, tetraaxial fabric, knitted, unidirectionally aligned fibers, and the like.

  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).

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.
The above-mentioned technology relating to integral formation is disclosed in US20050127233 (publication number: US2005 / 253298) filed in the United States on May 12, 2005, and US20050128232 (publication number: US2005 / 253299) in the US on May 13, 2005. ), And the present application uses the contents described in the above publication.

  7 and 8 are explanatory views showing a speaker device employing the above-described vibration direction converter (FIGS. 7A and 8A are cross-sectional views along the X-axis direction, FIG. (b) is an explanatory view showing the operation of the drive unit). Parts common to the above description are given the same reference numerals, and a part of the overlapping description will be explained. In the speaker devices 1A and 1B shown in FIG. 7 and FIG. 8, 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.

  In the speaker device 1A shown in FIG. 7, 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.

  In the illustrated example, 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. By forming a recess or notch 73 as a contact avoiding part 70 in the bottom 12A of the frame 12 of the attached member 200 arranged close to the joint part 52D, a notch in the illustrated example, A space is formed between the frame 12 and the bottom 12A. 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. In the illustrated example, 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.

  As shown in FIG. 7B, 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), 14 (L), link mechanisms 50L (R), 50L (L), voice coil support portions 40 (R), 40 (L), magnetic circuits 20 (R), 20 (L), and connecting portions 60 ( R), 60 (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.

  According to this, as shown in FIG. 8 (b), 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 driving 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.

  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, and FIG. 10 (a) is a plan view of a state in which the joint portion is stretched and the whole is flattened, and FIG. 10 (b) is a side view of a state in which the joint portion is stretched and the whole is flattened. In this example, 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.

  As shown in FIG. 9B, 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. And all the joint parts mentioned above are formed in the same composition. In each joint portion, inclined surfaces 51t and 53t are formed to face each other.

  As shown in FIG. 10 (a), 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. Further, 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.

  As shown in FIG. 10B, in order to form such a vibration direction changing portion 50, for example, 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. In order to form each joint part and inclined surfaces 51t and 53t on both sides thereof, V-shaped die cutting is performed. Thereafter, the above-described notch 50S is formed, and the resin material is cured. As the resin material used here, a liquid uncured resin material or a resin film can be used.

  Moreover, when forming each joint part and the inclined surfaces 51t and 53t on both sides thereof, 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.

  11, 12, 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). Also, 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). As described above, 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.

  Further, joint portions 52E (R) and 52E () with a pair of connection portions 53D (R) and 53D (L) whose one ends extend integrally from the first connection portions 53A (R) and 53A (L). L) and the other end of the third link portion 51C (R), (L) is the joint portion 52F (R), 52F (L) with the second connecting portion 53B and the connecting portion 53E integrated. Have.

  The first link portion 51A (R), the third link portion 51C (R), the first link portion 51A (L), the third link portion 51C (L), and the second link portion 51B (R ) And the third link portion 51C (L), and the second link portion 51B (L) and the third link portion 51C (R) form a parallel link.

  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.

  In the illustrated example, 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). In the connecting portions 53D (R) and 53D (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.

  The operation of the vibration direction converter 50 will be described with reference to FIG. In this example, the stationary connection portion 53 </ b> C supported by the frame 12 functions as the stationary portion 100. According to such a vibration direction conversion unit 50, when the joint portions 52A (R) and (L) move from the reference position X0 in the X-axis direction to X1 due to the vibration of the voice coil support unit 40, 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. At this time, since the joint portions 52D (L) and (R) are supported at both ends of the stationary connection portion 53C that becomes the stationary portion, 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.

  Similarly, when the joint portions 52A (R) and (L) move from the reference position X0 in the X-axis direction to X2, the second link portion 53B and the link portion 53E integrated therewith are maintained in a parallel state by the parallel link mechanism. The angle is changed so that the first link portions 51A (R), (L) and the third link portions 51C (R), (L) forming the parallel links fall down. At this time, since the joint portions 52D (R) and (L) are supported by the stationary portion, the first link portions 51A (R) and (L) and the third link receive the reaction force from the stationary portion. 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. Surely convert to

  According to such a vibration direction conversion unit 50, the joint portions 52B (R), (L), 52F (R) in which vibration in the X-axis direction of one voice coil support unit 40 vibrates with substantially the same phase and substantially the same amplitude. , (L) and the second connecting portion 53B are converted into vibrations in the Z-axis direction. As a result, 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.

  As shown in FIG. 11 (b), 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).

  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.

  Further, as shown in FIG. 11B, 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.

  With reference to FIG. 13, a method of forming such a vibration direction converter 50 will be described. As one forming method, as shown in FIG. 13A, 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. Then, 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. In addition, 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.

  In this example, 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.

  In the case where the sheet-like parts 501 and 502 are formed by the continuous member 50P and the rigid member 50Q, as shown in FIG. 13B, the two parts 501 and 502 are connected with the continuous member 50P facing each other. . According to this, the continuous member 50P can be integrated and the joint portion 52 can be smoothly refracted. Even in this case, a recess or notch 76 is formed as a contact avoidance portion 70 at a location close to the joint portion 52.

  Further, in the vicinity of each joint portion, an inclined surface as shown in FIG. 5C is formed at the end of each link portion. 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.

  As another example of formation, as shown in FIG. 13C, 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. By folding, the vibration direction converter 50 shown in FIGS. 11 and 12 can be obtained. In this example, as in the example shown in FIG. 10, 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. It can be easily formed by performing V-shaped die cutting as much as possible, and then forming the notch 50S and the opening 502A described above and curing the resin material.

  Moreover, when forming each joint part and the inclined surfaces 51t and 53t on both sides thereof, 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.

  In the vibration direction conversion unit 50 shown in FIGS. 8 to 13, 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.

  In the vibration direction converter 50 shown in FIGS. 11 to 13, the right first link portion 51 </ b> A (R), the third link portion 51 </ b> C (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.

  According to such speaker devices 1, 1 </ b> A, 1 </ b> B, when the audio signal SS is input, the voice coil is supported along the magnetic gap 20 </ b> G formed along a direction different from the allowable vibration direction of the diaphragm 10. The part 40 vibrates, and the vibration is changed in direction by the vibration direction changing part 50 and transmitted to the diaphragm 10, so that the diaphragm 10 is vibrated to the sound signal SS in the acoustic radiation direction SD. A corresponding sound is emitted.

  At this time, since the direction of the magnetic gap 20G intersects the vibration direction of the diaphragm 10 and the thickness direction of the speaker devices 1, 1A, 1B, the driving 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.

  In addition, since 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. In particular, in the speaker devices 1A and 1B shown in FIGS. 7 to 8, 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. As a result, 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.

  Further, in the speaker devices 1, 1 </ b> A, and 1 </ b> B shown in FIGS. 2, 7, and 8, 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. As a result, 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 driving force can be reduced. The speaker devices 1, 1 </ b> A, 1 </ b> B can be thinned while ensuring sufficient. Moreover, even if the speaker devices 1, 1 </ b> A, 1 </ b> B are thinned by providing the connecting portion 60, 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.

  Further, 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. In addition, 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.

  A vibration direction conversion unit 50 shown in FIG. 14 is an improved example of the embodiment shown in FIG. In the example shown in FIG. 14A, 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. In the illustrated example, 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. Further, in the example shown in FIG. 5B, 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. In the illustrated example, 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.

[Magnetic circuit]
15 and 16 are explanatory views showing a magnetic circuit for a speaker device according to an embodiment of the present invention. As described above, the magnetic circuit 20 includes the magnet 21 and the magnetic pole member (yoke part) 22, and a plurality of magnetic gaps 20 </ b> G <b> 1 and 20 </ b> G <b> 2 arranged in the vibration direction of the voice coil 30 by the magnet 21 and the magnetic pole member 22. (30X in the figure is the center line of the voice coil 30).

  The magnetic circuit 20 includes a first magnetic pole surface 20X formed of a magnetic body including a magnet 21 on one side, which is partitioned by a voice coil 30 facing the plurality of magnetic gaps 20G1 and 20G2, and a magnetic And a second magnetic pole surface 20Y composed of a plate-like magnetic body (yoke portion 22) bonded to the magnetic body, and the plate-like magnetic body (yoke portion 22) forms a first magnetic pole surface 20X. The joining surface with the (magnet 21) and the second magnetic pole surface 20Y are formed in a step shape so that the first magnetic pole surface 20X and the second magnetic pole surface 20Y have substantially the same height.

  That is, as shown in FIGS. 4A and 4B, the yoke portion 22 which is a plate-like magnetic body is in a refracted state (including a bent state) in a sectional view, and the magnet 21 and the magnet A flat plate portion 22h1, an inclined portion 22t extending from the flat plate portion 22h1 to the second magnetic pole surface 20Y, and a flat plate portion 22h2 for forming the second magnetic pole surface 20Y. The first magnetic pole surface 20X is formed on a magnet 21 that is a magnetic body disposed on the flat plate portion 22h1.

  As shown in FIG. 5A, in the plurality of magnetic gaps 20G1 and 20G2, a third magnetic pole surface 20X1 and a fourth magnetic pole surface 20Y1 are formed in the other of the spaces partitioned by the voice coil 30. The third magnetic pole surface 20X1 is disposed opposite to the first magnetic pole surface 20X, and the fourth magnetic pole surface 20Y1 is disposed opposite to the second magnetic pole surface 20Y. The third magnetic pole surface 20X1 is composed of a magnetic body including the magnet 21, and the fourth magnetic pole surface 20Y1 is composed of a plate-shaped magnetic body (yoke portion 22).

  In the example shown in FIG. 5B, the other of the spaces partitioned by the voice coil 30 in the plurality of magnetic gaps 20G1, 20G2 is a plate disposed opposite to the first magnetic pole surface 20X and the second magnetic pole surface 22Y. A yoke portion 22 is provided.

  In such a magnetic circuit 20, a plurality of magnetic gaps 20G1 and 20G2 form magnetic fields opposite to each other along a uniaxial direction (for example, the Z-axis direction), as shown in FIG. A voice coil 30 around which a conductive member is wound is disposed in the magnetic gaps 20G1 and 20G2 so as to intersect the magnetic field direction and so that a current flows in the opposite direction in each magnetic gap 20G1 and 20G2. When an audio current flows through the conductive member of the voice coil 30, a driving force (Lorentz force, electromagnetic force) is applied to the voice coil 30 in the magnetic field direction of the magnetic gaps 20G1 and 20G2 and the direction intersecting the current (for example, the X-axis direction). The voice coil 30 vibrates along the driving force.

  The magnetic flux density in the magnetic gap 20G1 formed by the first magnetic pole surface 20X and the third magnetic pole surface 20X1 is such that the magnetic gap 20G2 formed by the second magnetic pole surface 20Y and the fourth magnetic pole surface 20Y1. When the vibration direction converter 50 is disposed on the magnetic gap 20G1 side and the end of the voice coil 30 and the vibration direction converter 50 are connected, the driving force of the voice coil 30 is large. Can be made relatively large.

In the magnetic circuit 20, a magnetic body that becomes the magnet 21 and a magnetic body that becomes the yoke portion 22 are arranged as shown in FIG. 15A or 15B, and the magnetic body that becomes the magnet 21 in this arrangement state. Magnetize. In the example shown in FIG. 6A, after the pair of magnets 21 and 21 are assembled in the magnetic circuit 20, they can be obtained by a single magnetization process. By reducing the number of times of magnetization, dust and the like can be prevented from entering the magnetic circuit 20, the reliability of the speaker device can be improved, and the manufacturing process can be simplified.
Note that the first magnetic pole surfaces 20X and 20X1 shown in FIG. 15 are composed of the magnet 21, but are sandwiched between, for example, the magnet 21 and the flat plate portion 22h1, or provided on the magnetic gap 20G1 side of the magnet 21. The first magnetic pole surface 20X composed of the magnetic body and the magnet 21 may be used.

  FIG. 16 is an explanatory diagram showing another configuration example of the magnetic circuit for the speaker device according to the embodiment of the present invention (FIG. 16A is a plan view, and FIG. 16B is an XX cross-sectional view). . In this example, the structure for forming the magnetic gaps 20G1 and 20G2 is the same as that of the example of FIG. 15 described above, but the yoke portion 22 which is a plate-like magnetic body has a plurality of protruding portions 22p. The plurality of protrusions 22p (first protrusions 22p1, 22p2) extend in directions opposite to each other along a direction (eg, the Y-axis direction) intersecting the vibration direction (eg, the X-axis direction) of the voice coil. Yes. In addition, one protrusion 22p (second protrusion 22p3) extends along the vibration direction of the voice coil 30.

  The plurality of protrusions 22p (22p1, 22p2, 22p3) function as locking protrusions for attaching the magnetic circuit 20 to the stationary part 100. By providing the protrusion 22p, the gaps in the magnetic gaps 20G1 and 20G2 can be made substantially constant along the vibration direction of the voice coil 30. Therefore, the uniformity of the magnetic flux density in the magnetic gaps 20G1 and 20G2 can be improved.

[Example / Modification / Installation Example]
FIG. 17 is a plan view of the speaker device according to the embodiment of the present invention, and FIG. 18 is a rear view thereof. In the following description, the speaker device 1B shown in FIG. 8 is used as a basic configuration, and a speaker device equipped with the magnetic circuit 20 shown in FIG.

  In the example shown in FIG. 17, the diaphragm 10 is formed in a rectangular shape viewed from the sound radiation direction, and has an elliptical outer shape near the center and a curved portion 10 </ b> A having a concave cross-sectional shape. In this way, a predetermined bending rigidity is provided in the vibration direction of the diaphragm 10 and the vibration direction of the voice coil 30. Further, by forming 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. In addition, when the pair of vibration direction conversion units 50 are arranged to face each other, 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.

  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. You may form a reinforcement part along the direction of an axis | shaft. 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). Thus, by filling the groove with the filler, 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. As another example of the reinforcing portion, instead of forming the groove portion, a fiber member (not shown) made of a nonwoven fabric or the like may be attached. Thereby, by making the reinforcing portion 10B into a fiber-based member, the rigidity (bending rigidity) of the diaphragm 10 can be improved. When the diaphragm 10 vibrates, vibration and air resistance propagated from the vibration direction changing section. Therefore, it is possible to suppress deformation such as deflection in the diaphragm 10. Furthermore, the internal loss of the diaphragm 10 can be improved by providing the reinforcing portion 10B.

  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. As 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 diaphragm 10 to be able to vibrate on a frame 12 that is a stationary portion 100 is disposed between the diaphragm 10 and the frame 12 that is the stationary portion 100, and an inner peripheral portion thereof is an outer peripheral portion of the diaphragm 10. In addition, the diaphragm 10 is held at a specified position by the outer peripheral portion being joined to the frame 12 directly or via another member. Examples of the other member include an elastic member (including a resin member) having a function as a packing, an adhesive resin, and the like. Specifically, 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. . As 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. Further, 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 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.

  As described above, when the voice coil 30 vibrates, the vibration is transmitted to the diaphragm 10 via the link mechanism 50L. At this time, the link mechanism 50L that converts the angle of the link portion 51 is counteracted by the vibration from the diaphragm 10. Receive power. When the link mechanism 50L receives such a reaction force, the link mechanism 50L itself vibrates when the stationary part 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. Therefore, by adding a function of preventing the bending of the bridging portion 102 that is a part of the stationary portion 100 that supports the link mechanism 50L, unnecessary vibration is transmitted to the link portion and the diaphragm 10. Can be suppressed. Thereby, the vibration of the voice coil 30 is efficiently transmitted to the diaphragm 10.

  The stationary part 100 includes a first constituent member (first frame) 100A and a second constituent member (second frame) 100B. The first component member 100A is a support member on the acoustic emission side of the speaker device 1B, and the second component member 100B is a support member on the opposite side (back side) to the acoustic emission side. The drive unit 14 of the speaker device 1 is supported so as to be sandwiched between the first component member 100A and the second component member 100B.

  The first component member 100 </ b> A includes an outer peripheral frame portion 101 formed in an annular shape, supports the outer periphery of the diaphragm 10 via the edge 11, and one side of the magnetic pole member (yoke portion) 22 of the magnetic circuit 20. (22B) is supported. On the other hand, the second component member 100B includes an outer peripheral frame portion 101 and a bridging portion 102, supports one side (22A) of the magnetic pole member (yoke portion) 22 of the magnetic circuit 20, and the bridging portion 102 is a link mechanism 50L. Support. At this time, the bridging portion 102 has rigidity against the force received from the diaphragm 10 via the link mechanism 50L. For this purpose, in the vibration direction of the diaphragm 10, it is preferable that the compliance of the bridging portion 102 is substantially the same as or smaller than the compliance of the outer peripheral frame portion 101. 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.

  19 and 20 are perspective views showing a single-piece structure of the first component member 100A and the second component member 100B (FIG. 19A is a plan perspective view of the first component member 100A, and FIG. FIG. 20B is a rear perspective view of the member, FIG. 20A is a plan perspective view of the second component member 100B, and FIG. 20B is a rear perspective view of the member. The first component member 100A is a second outer peripheral frame portion 101B that supports the diaphragm 10 inside the first outer peripheral frame portion 101A, with the outer peripheral frame portion 101 in the stationary portion 100 as the first outer peripheral frame portion 101A. Is provided. The opening inside the second outer peripheral portion 101 </ b> B is blocked by the edge 11 and the diaphragm 10.

  The bridging portion 102 provided in the second component member 100 </ b> B is formed with a first projecting portion 102 </ b> A that projects 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. In addition, 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.

  Further, 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 reinforcing part 103 having a polygonal planar shape is formed by the plurality of second protrusions 102B and the third protrusions 102C.

The first component member 100A and the second component member 100B that become the stationary portion 100 have a planar shape having a major axis O ₁ and a minor axis O ₂ , and the bridging portion 102 is along the minor axis O ₂ direction. Is formed. Further, the bridging portion 102 can be formed along the major axis O ₁ direction, or can be formed along the major axis ○ ₁ direction and the minor axis ○ ₂ direction.

  Convex portions 100m are formed at the four corners of the first constituent member 100A, and concave portions 100n are formed at the four corners of the second constituent member 100B, and the convex portions 100m and the concave portions 100n are fitted together to form the first configuration. The member 100A and the second component member 100B are coupled. The convex portion 100m may be formed on one of the first constituent member 100A and the second constituent member 100B, and the concave portion 100n may be formed on the other of the first constituent member 100A and the second constituent member 100B. . The recess 100n may be formed as a hole.

  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 structural member 100 </ b> A and the second structural member 100 </ b> B support the yoke portion 22 included in the magnetic circuit 20. The first component member 100 </ b> A and the second component member 100 </ b> B include a concave receiving portion 105 that houses a part of the yoke portion 22. The above-described protrusion 22p is fitted into the receiving portion 105, and the yoke portion 22 is positioned in order to form an appropriate magnetic gap.

  On the side surface of the first component member 100 </ b> A, a guide portion 106 that guides the wiring 82 for inputting an audio signal to the voice coil 360 from the outside is formed. Further, an opening 101S is formed between the outer peripheral frame portion 101 and the bridging portion 102 in the second component member 100B. A fourth protrusion 102D is formed on the outer peripheral frame portion 101 along the outer peripheral edge of the opening 101S. The fourth protrusion 102D increases the torsional rigidity of the outer peripheral frame 101.

  Furthermore, an excessive vibration suppression unit 108 for suppressing excessive vibration of the voice coil 30 is formed in the first structural member 100A or the second structural member 100B. 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.

  FIG. 21 is a plan view showing a state in which the drive unit is assembled on the first component member 100A. In FIG. 21, the second component member 100B is omitted. On the first structural member 100A to which the diaphragm 10 and the edge 11 are attached, a pair of magnetic circuits 20, a pair of voice coils 30 (voice coil support portions 40), and a vibration direction conversion portion 50 (link mechanism 50L) are provided. Assembled.

  The magnetic circuit 20 is attached to the first component member 100A in a state where the one-side magnetic pole member 22 indicated by a broken line is joined to the magnet. The magnetic pole member 22 includes a plurality of protruding portions 22p, and the protruding portions 22p are supported by the receiving portion 105 having the concave section described above. 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 voice coil 30 is elastically held on the stationary part 100 by the holding part 15. The holding unit 15 restricts the vibration of the voice coil 30 in one axial direction and suppresses movement in the other direction. The voice coil 30 is supported by the voice coil support portion 40 and is held by the attachment unit 16 by the holding portion 15. The mounting and positioning of the voice coil 30 are simplified by mounting the mounting unit 16 on the first component member 100A.

  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.

  By fitting the other end of the second link portion 51 </ b> B with the bridging unit 102, the vibration direction conversion unit 50 and the bridging unit 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 102E 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.

  22 and 23 are explanatory views showing examples of the present invention. FIG. 22 is a partial cross-sectional view of the above-described speaker device 1B. FIG. 23 is a perspective view mainly illustrating a state in which the first component member 100A, the diaphragm 10, and the edge 4J of the speaker device 1B are removed. Portions common to the above description are denoted by the same reference numerals, and a part of the description is omitted.

  In a state where the first component member 100A and the second component member 100B are coupled, the second coupling portion 53B of the vibration direction conversion unit 50 is coupled to the back surface of the diaphragm 10 supported by the first component member 100A. The stationary connecting portion 53C of the vibration direction changing portion 50 is connected to the connecting portion 104 formed at the central portion of the bridging portion 102 in the second component member 100B.

  The second connecting portion 53B is a portion integrated with the end portion of the first link portion 51A via the joint portion 52B. When the second connecting portion 53B and the diaphragm 10 are connected, 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 connecting 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 portion of the second link portion 51B via a joint portion 52D, and a hole 104B is formed in the connecting portion 53C, and the hole 104B is formed in the hole 104B. 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 unit 40 on which the voice coil 30 is supported and the vibration direction conversion unit 50 are connected via a connection unit 60. The connecting 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 stationary part 100 by the holding part 15. 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 unit 15A and the second holding unit 15B hold the voice coil support unit 40 on the first component member 100A and the second component member 100B via the mounting unit 16. 15 A of 1st holding parts hold | maintain the connection part 60 in the one side part of the attachment unit 16, and the edge part inside the 1st holding part 15A provided in each right and left is the edge of both the outer sides of the connection part 60 The outer ends of the first holding portions 15A are connected to the attachment unit 16, respectively. The first holding portion 15A is made of a conductive metal, and is electrically connected to a lead wire drawn from the end of the voice coil 30, and an audio signal is transmitted through the first holding portion 15A. 30. The first holding portion 15A is electrically connected to the linear connection terminal portions 81 and 81 supported by the second component member 100B, and is electrically connected to the connection terminal portions 81 and 81, respectively. It is electrically connected to the outside through wirings 82, 82.

  The second holding portion 15 </ b> B has a central portion connected to the other side portion of the mounting unit 16, and both ends connected to the left and right ends of the voice coil support portion 40. Here, 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. In addition, since 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 holding portion 15B is not limited to this and may be modified so as to be accommodated in the stationary portion 100.

  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. Further, the terminal portions 81 and 81 are formed between the first frame 12B (first constituent member 100A) and the second frame 12C (second constituent member 100B) constituting the frame 12 which is the stationary portion 100. Terminal portions 81 and 81 are arranged inside an opening portion (not shown). 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. Moreover, the 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 that are electrically connected to the outside, and the terminal portions 81 and 81 and wirings 82 are electrically connected by the connection portion 81a. . Further, the wiring 82 is fixed to the side surface of the stationary portion 100, and the outer peripheral frame portion 101 of the stationary portion 100 has a side surface to which the wiring 82 is attached, and the side surface of the stationary portion 100 guides the wiring 82. Portions 106 and 106 are formed.

  On the other hand, a conductive layer (voice coil lead wire) 32 connected to a lead wire 31 made of a conductive member is formed on the voice coil support portion 40 (base body) that supports the voice coil 30. The conductive layer (voice coil lead wire) 32 is patterned on the voice coil support 40 (base body) so as to surround the conductive member of the voice coil 30, and the conductive layer (voice coil lead wire) 32 is voice coil lead. The conductive member of the voice coil 30 and the holding unit 15 are electrically connected via the line 31.

  The holding portion 15 is formed with a wiring that electrically connects the voice coil 30 and the terminal portion 81, and the conductive layer (voice coil lead wire) 32 and the wiring of the holding portion 15 are electrically connected, The holding portion 15 and the end portions of the terminal portions 81, 81 are electrically connected, and the wiring 82 is connected to the terminal portions 81, 81, whereby an audio signal is input to the voice coil 30 from the outside.

  The holding portion 15 is formed with a connection portion F1 connected to the terminal portions 81 and 81. The connecting portion F1 extends in a direction intersecting with the vibration direction (Z-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 (not shown) that is connected to the voice coil lead wire 43 and extends in a direction intersecting with the vibration direction (Z-axis direction) of the diaphragm 10, It is formed in a flat plate shape so as to come into contact with the end of the line 43.

  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. Further, connection hole portions 16d into which the convex portions 100m provided in the first component member 100A of the stationary portion 100 are inserted are provided at the four corners of the mounting unit 16, and are fixed to the stationary portion 100 at predetermined positions. The

  In the magnetic circuit 20, the yoke portions 22A and 22B are attached to the first component member 100A and the second component member 100B. Further, by coupling the first component member 100A and the second component member 100B, a gap formed between the yoke portions 22A and 22B or between the magnets 21 becomes a magnetic gap.

  According to this embodiment, 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. In addition, since the end portion of the voice coil support portion 40 and the end portion of the vibration direction converting portion 50 are connected at different heights via the connecting portion 60, each link portion of the vibration direction changing portion 50 is connected to the device. A sufficient length can be secured within the height. Further, a part of the height of the magnetic circuit 20 can be accommodated within the height of the vibration direction converter 50.

FIG. 24 shows a modification of the speaker device according to the embodiment of the present invention. Portions common to the above description are given the same reference numerals and redundant description is omitted. In this modification, a yoke part 22 formed of a plate-like magnetic body is laminated. The yoke parts 22A and 22A1 made of two laminated magnetic bodies are supported on the first component member 100A side that supports the diaphragm 10, and the two laminated magnetic members are arranged on the second component member 100B side. The yoke portions 22B and 22B1 made of a body are supported. The magnetic gap of the magnetic circuit 20 is formed between the magnets 21 and 21 and the yoke portions 22A and 22B adjacent to each other. In the illustrated example, the yoke portions 22A, 22A1, 22B, and 22B1 have protruding portions 22p (corresponding to the first protruding portions 22p1 and 22p2) that protrude in a direction intersecting the vibration direction of the voice coil 30. Is formed. The protruding portion 22p is formed with a step portion on the side surface of the stationary portion 100 facing the yoke portion 22, and the protruding portion 22p is supported on the step portion to form a magnetic gap. Moreover, you may form in the yoke part 22 the 2nd protrusion part 22p3 which protrudes along the vibration direction of the voice coil 30, and it does not specifically limit it.
FIG. 25 shows another modification of the speaker device according to the embodiment of the present invention. Portions common to the above description are given the same reference numerals and redundant description is omitted. In this modification, the magnet 21 is first arranged on the side of the magnetic gap and the magnetic gap is formed within the thickness of the magnet 21, so that both the magnetic circuit 20 can be made thin and the thickness of the magnet 21 can be ensured. Yes. The arrow indicates the direction of the magnetic pole of the magnet 21. In the illustrated example, the magnetic circuit is formed separately for each corresponding linear portion of the voice coil 30. That is, the magnets 21 and 21 are sandwiched between both sides of the pair of yoke portions 22Aa and the yoke portion 22Ba that sandwich the magnetic gap, and in parallel with the magnets on both sides of the pair of yoke portions 22Ab and the yoke portion 22Bb that sandwich the magnetic gap. 21 and 21 are clamped. The magnetic gap is formed between the convex portions 22a and 22b protruding from the yoke portion. In the example shown in the figure, two magnetic circuits are arranged in the X-axis direction, but they can be formed integrally.

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 | maintenance part 15B. The flat portions F at the left and right ends of the second holding portion 15B are formed with holes into which the connecting 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 an 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.

The first holding portion 15 </ b> A has a connection surface F <b> 1 on one end side connected to the terminal portion 81, and a connection surface F <b> 2 on the other end side connected to the connection terminal 42 of the voice coil lead wire 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. To the voice coil lead line 32. 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 In addition, a part of the terminal portion 81 is subjected to insulation treatment, and the surface of the conductive member in the region connected to the connection surface F1 of the first holding portion 15A is exposed, and the first holding portion 15A It can be connected electrically. Further, 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, and is electrically connected to the connection surface F ₁ of the holding portion 15. It doesn't matter.

  As described above, the speaker device 1 according to the embodiment of the present invention can be reduced in thickness and can be increased in volume. Such a speaker device can be effectively used for various electronic devices and in-vehicle use. FIG. 28 is an explanatory diagram showing an electronic device including the speaker device according to the embodiment of the present invention. In 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. Even if 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. 29 is an explanatory view showing an automobile provided with a speaker according to an embodiment of the present invention. In the automobile 4 shown in the figure, the space in the vehicle can be expanded by making the speaker device 1 thinner. In particular, even when 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 can be made relatively small, and the driver's operation space and the indoor space can be increased. Is possible. In addition, since 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.

  In addition, as a building equipped with the speaker device 1, 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. In facilities and the like (buildings), when the speaker device 1 is installed on a wall or ceiling as a member to be attached, the thickness space necessary for the installation of the speaker device 1 can be reduced, so that unnecessary space in the room can be deleted. Can be used effectively. In recent years, with the widespread use of 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. 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. In addition, as for the arrangement | positioning location of the speaker apparatus 1, the ceiling, wall, etc. (attachment member) in a living room are mentioned, for example.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention. In addition, each of the above-described embodiments can divert each other's technology as long as there is no particular contradiction or problem in its purpose and configuration. This application includes PCT / JP2008 / 051197 filed internationally on January 28, 2008, PCT / JP2008 / 068580 filed internationally on October 14, 2008, PCT / JP2008 / 068580 filed internationally on October 27, 2008. JP2008 / 069480, PCT / JP2008 / 069269 filed internationally on October 23, 2008, PCT / JP2009 / 053752 filed internationally on February 27, 2009, PCT / JP2009 / filed internationally on February 26, 2009 053592, PCT / JP2009 / 050764 filed internationally on January 20, 2009, PCT / JP2009 / 055533 filed internationally on March 19, 2009, PCT / JP2009 / 055496 filed internationally on March 19, 2009, PCT / JP2009 / 055497 filed internationally on March 19, 2009, PCT / JP2009 / 055498 filed internationally on March 19, 2009, PCT / JP2009 / 055534 filed internationally on March 19, 2009, 2009 PCT / JP2009 / 055523 filed internationally on March 19, PCT / JP2009 / 055524 filed internationally on March 19, 2009, PCT / JP2009 / 055525 filed internationally on March 19, 2009, March 2009 PCT / JP2009 / 055526 filed internationally on 19th, PCT / JP2009 / 055527, 200 filed internationally on 19th March 2009 All the contents described in PCT / JP2009 / 055528 filed internationally on March 19, 2009 are incorporated in this application.

Example shown in FIG. (B) is in the other space partitioned by the voice coil 30 in a plurality of magnetic gaps 20G1,20G2, first pole face 20X, disposed opposite to the second pole face 20 Y A plate-like yoke portion 22 is provided.

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, between the pair of joint portions 52B is formed between the moving direction converting unit 50 vibrating and the vibration plate 10, by forming a curved portion 10A to the diaphragm 10, prevents a deflection occurs Can do.

19 and 20 are perspective views showing a single-piece structure of the first component member 100A and the second component member 100B (FIG. 19A is a plan perspective view of the first component member 100A, and FIG. FIG. 20B is a rear perspective view of the member, FIG. 20A is a plan perspective view of the second component member 100B, and FIG. 20B is a rear perspective view of the member. The first component member 100A is a second outer peripheral frame portion 101B that supports the diaphragm 10 inside the first outer peripheral frame portion 101A, with the outer peripheral frame portion 101 in the stationary portion 100 as the first outer peripheral frame portion 101A. Is provided. The opening inside the second outer peripheral frame portion 101 </ b> B is blocked by the edge 11 and the diaphragm 10.

On the side surface of the first component member 100 </ b> A, a guide portion 106 that guides the wiring 82 for inputting an audio signal to the voice coil 30 from the outside is formed. Further, an opening 101S is formed between the outer peripheral frame portion 101 and the bridging portion 102 in the second component member 100B. A fourth protrusion 102D is formed on the outer peripheral frame portion 101 along the outer peripheral edge of the opening 101S. The fourth protrusion 102D increases the torsional rigidity of the outer peripheral frame 101.

On the other hand, a conductive layer (voice coil lead wire) 32 connected to a lead wire 31 made of a conductive member is formed on the voice coil support portion 40 (base body) that supports the voice coil 30. Conductive layer (the voice coil lead wires) 32 are patterned on the voice coil 30 of conductive voice coil supporting part 40 so as to surround the member (substrate), the conductive layer (the voice coil lead wire) 32 pull the output line The conductive member of the voice coil 30 and the holding unit 15 are electrically connected via 31.

As described above, the speaker device 1 according to the embodiment of the present invention can be reduced in thickness and can be increased in volume. Such a speaker device can be effectively used for various electronic devices and in-vehicle use. FIG. 28 is an explanatory diagram showing an electronic device including the speaker device according to the embodiment of the present invention. In 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. Even if 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. 29 is an explanatory view showing an automobile provided with the speaker device 1 according to the embodiment of the present invention. In the automobile 4 shown in the figure, the space in the vehicle can be expanded by making the speaker device 1 thinner. In particular, even when 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 can be made relatively small, and the driver's operation space and the indoor space can be increased. Is possible. In addition, since 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.

Claims (33)

A magnetic circuit for a speaker device that is used in a speaker device that transmits vibration of a planar voice coil to a diaphragm via a rigid vibration direction converter, and vibrates the voice coil in a plane,
Comprising a plurality of magnetic gaps arranged in the vibration direction of the voice coil;
One magnetic pole surface partitioned by the voice coil facing the plurality of magnetic gaps is composed of a first magnetic pole surface composed of a magnetic body including a magnet and a plate-shaped magnetic body magnetically bonded to the magnet. A second magnetic pole surface
The plate-like magnetic body is formed by forming a step surface between a joint surface with the magnetic body that forms the first magnetic pole surface and the second magnetic pole surface, and the first magnetic pole surface and the second magnetic pole surface. A magnetic circuit for a speaker device, wherein the magnetic pole surface of the speaker device has substantially the same height.   2. The speaker according to claim 1, wherein the plate-like magnetic body includes a flat plate portion that is magnetically bonded to the magnet, and an inclined portion that extends from the flat plate portion to the second magnetic pole surface. Magnetic circuit for equipment.   The magnetic circuit for a speaker device according to claim 2, wherein a magnetic body constituting the first magnetic pole surface is disposed on the flat plate portion.   The magnetic circuit for a speaker device according to claim 3, wherein a third magnetic pole surface and a fourth magnetic pole surface are formed in the other space partitioned by the voice coil. The third magnetic pole surface is disposed opposite to the first magnetic pole surface,
The fourth magnetic pole surface is disposed opposite to the second magnetic pole surface,
5. The speaker according to claim 4, wherein the third magnetic pole surface is configured by a magnetic body including the magnet, and the fourth magnetic pole surface is configured by the plate-shaped magnetic body. Magnetic circuit for equipment.   The magnetic flux density in the magnetic gap formed by the first magnetic pole surface and the third magnetic pole surface is equal to the magnetic flux density in the magnetic gap formed by the second magnetic pole surface and the fourth magnetic pole surface. The magnetic circuit for a speaker device according to claim 5, wherein the magnetic circuit is large. A magnetic circuit for a speaker device according to claim 1 is provided as a drive unit, comprising: a diaphragm; and a stationary part that supports the diaphragm so as to freely vibrate along a vibration direction. The driving unit to be applied is supported by the stationary unit and forms a magnetic gap; a voice coil that receives the audio signal and vibrates along a direction different from the vibration direction of the diaphragm;
The speaker device comprising: the vibration direction conversion unit that changes the direction of vibration of the voice coil and transmits the vibration to the diaphragm. The stationary portion includes an outer peripheral frame portion and a bottom surface portion that surround the magnetic circuit for the speaker device,
The plate-like magnetic body included in the speaker device magnetic circuit is:
Protruding portion extending toward the outer peripheral frame portion of the stationary portion,
The speaker device according to claim 7, wherein the magnetic circuit for the speaker device is supported by the stationary portion through the protruding portion.   The speaker device according to claim 8, wherein the plurality of protrusions extend in directions opposite to each other along a direction intersecting with a vibration direction of the voice coil. The plurality of protrusions include a plurality of first protrusions extending along a direction intersecting the vibration direction of the voice coil,
The speaker device according to claim 8, further comprising a second protrusion extending along a vibration direction of the voice coil.   The speaker device according to claim 8, wherein the stationary portion is formed with a receiving portion that supports the protruding portion.   The speaker device according to claim 11, wherein an end portion of the protruding portion is supported by a receiving portion of the stationary portion.   The speaker device according to claim 12, wherein the receiving portion has a concave cross section. The stationary part is formed of a plurality of constituent members,
The speaker device according to claim 13, wherein the plurality of constituent members support each of the plate-like magnetic bodies constituting the second magnetic pole surface and the fourth magnetic pole surface.   The speaker device according to claim 14, wherein the plate-like magnetic body has a width that decreases from the vibration direction conversion portion to the stationary portion facing the vibration direction conversion portion.   The speaker device according to claim 15, wherein the second magnetic pole surface and the fourth magnetic pole surface are constituted by a plurality of the plate-like magnetic bodies.   The speaker device according to claim 15, wherein the plurality of magnetic circuits for the speaker device are arranged side by side along a direction in which the voice coil vibrates with the vibrating body interposed therebetween. The vibration direction conversion section has one end connected to the voice coil directly or via another member so that the angle can be changed, and the other end directly or via another member so that the angle can be changed to the diaphragm. Connected,
The speaker device according to claim 7, further comprising a rigid link portion provided obliquely to each of a vibration direction of the diaphragm and a vibration direction of the voice coil.   The speaker device according to claim 7, wherein the vibration direction conversion unit includes a link mechanism that converts an angle of a link portion formed between the voice coil support unit and the diaphragm.   A connecting portion for connecting the end portions on the voice coil side of the vibration direction conversion portion and the end portions on the vibration direction conversion portion side of the voice coil with different positions along the vibration direction. The speaker device according to claim 7, wherein the speaker device is provided. The vibration direction conversion unit is connected to a mounted member including the diaphragm and the voice coil, and includes a joint portion close to the mounted member,
The speaker device according to claim 7, wherein a contact avoiding portion that avoids contact with the joint portion is formed on a surface side of the attached member that is close to the joint portion. The vibration direction conversion unit is connected to a mounted member including the diaphragm and the voice coil, and includes a joint portion close to the mounted member,
The housing part of the adhesive member which joins the said vibration direction conversion part and the said to-be-attached member is formed in the surface side of the to-be-attached member facing the said joint part, The Claim 7 characterized by the above-mentioned. Speaker device. The vibration direction conversion portion includes a rigid link portion that is obliquely provided so as to be capable of changing an angle between the voice coil and the diaphragm, and joint portions formed at both ends of the link portion,
The speaker device according to claim 7, wherein the joint portion is formed of a continuously-refractive member that is continuous at both side portions straddling the joint portion. The voice coil includes a conductive member that is planar and annularly wound, and a rigid base that supports the conductive member,
The speaker device according to claim 7, wherein a conductive layer is patterned on an outer surface of the conductive member in the base body.   25. The speaker device according to claim 24, wherein a pair of the conductive layers are provided so as to surround the conductive member, and function as a relay line for inputting an audio signal to the conductive member.   2. The speaker device according to claim 1, further comprising a first holding unit that holds the voice coil so as to freely vibrate in a vibration direction of the voice coil, directly or via another member on the stationary unit. .   27. The speaker device according to claim 26, further comprising: a second holding portion that holds the voice coil so as to freely vibrate in the vibration direction of the voice coil, directly or via another member on the stationary portion. . A connecting portion for connecting the end portions on the voice coil side of the vibration direction conversion portion and the end portions on the vibration direction conversion portion side of the voice coil with different positions along the vibration direction. Prepared,
Between the connecting part and the stationary part, the first holding part is arranged on the left and right of the connecting part,
The second holding part is disposed on the stationary part side with respect to the first holding part and on the left and right with respect to the voice coil,
28. The speaker device according to claim 27, wherein the first holding part and the second holding part hold the voice coil substantially symmetrically on the stationary part directly or via another member.   The center part of the second holding part is held by the stationary part directly or via another member, and both ends thereof are connected to left and right ends of the voice coil. Speaker device.   29. The speaker device according to claim 28, wherein the first holding part and the second holding part hold the connecting part and the voice coil in the stationary part via an attachment unit.   An electronic apparatus comprising the speaker device according to claim 7.   An automobile comprising the speaker device according to claim 7.   A building comprising the speaker device according to claim 7.

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