WO2010106673A1

WO2010106673A1 - Speaker device

Info

Publication number: WO2010106673A1
Application number: PCT/JP2009/055497
Authority: WO
Inventors: 哲也大沼
Original assignee: パイオニア株式会社; 東北パイオニア株式会社
Priority date: 2009-03-19
Filing date: 2009-03-19
Publication date: 2010-09-23
Also published as: JPWO2010106673A1

Abstract

A thin speaker device capable of transmitting large vibration by a relatively simple structure. The speaker device has a stationary section (100) and a vibrating section (200) vibratably supported by the stationary section. The stationary section (100) includes a magnetic circuit (20) for forming a magnetic gap (20G) extending in one direction. The vibrating section (200) is provided with a vibrating plate (10), a voice coil (30) mounted in the magnetic gap (20G) and vibrating in a direction different from the direction of vibration of the vibrating plate (10), and a vibrating-direction converting section (50) having rigidity and transmitting vibration of the voice coil (30) to the vibrating plate (10) after changing the direction of the vibration. A wiring (31) for a voice signal input is provided between the stationary section (100) and the voice coil (30). The wiring (31) is provided with a restricting section (32) for restricting movement of the wiring (31) and also with an extra length section (33) extending from the restricting section (32) to the voice coil (30) and adapted so that the angle of the extra length section (33) relative to the restricting section (32) can be changed.

Description

Speaker device

The present invention relates to a speaker device.

FIG. 1 is an explanatory view showing a conventional 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 are in the vibration direction (acoustic radiation direction) of the diaphragm 21J. Therefore, 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 height of the edge 4J (a), the voice coil bobbin height (b) from the junction of the diaphragm 21J and the voice coil bobbin 610J to the upper end of the voice coil 611J, the voice coil height (c), and the main magnet of the magnetic circuit It consists of the height (d) and the thickness (e) of the yoke 51J mainly of the magnetic circuit. 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.

On the other hand, in a general speaker device, in order to input a voice signal to the voice coil 611J, a wiring (nishiki wire, lead wire, etc.) is connected to the end of the voice coil 611J, and this wiring is provided on the frame. Connected to the terminal. According to this, when the voice coil vibrates due to the audio signal, the wiring freely moves with the voice signal, and contacts the members such as the voice coil 611J, the voice coil bobbin 610J, the yoke 51J, the magnet 52J, and the plate 53J constituting the speaker. Sound may be generated. In addition, there is a problem that the durability of the connection portion between the wiring and the signal terminal is lowered, such as when the wiring is broken due to a tension or the like, or when the wiring and the signal terminal are disconnected.
Further, when the wiring enters the magnetic circuit, particularly the magnetic gap, the Lorentz force acts on the wiring to which the audio signal is inputted, and gives unnecessary vibration to the voice coil bobbin 610J. The voice coil bobbin 610J constitutes the magnetic circuit. For example, problems such as generation of abnormal noise by contacting members such as the yoke 51J, the magnet 52J, and the plate 53J, and vibration of the voice coil bobbin 610J in a direction different from the desired vibration direction occur.

The present invention is an example of a problem to deal with such a problem. That is, to provide a thin speaker device that can radiate a large volume of reproduction sound with a relatively simple structure, and when the voice coil vibrates, the wiring interferes with or contacts the members constituting the speaker. It is an object of the present invention to suppress problems such as occurrence, and to suppress unnecessary vibration that occurs when the wiring enters the magnetic circuit, particularly when the wiring enters the magnetic gap when the voice coil vibrates. .

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 stationary part and a vibrating part supported by the stationary part so as to freely vibrate, the stationary part including a magnetic circuit forming a magnetic gap, the vibrating part including a diaphragm, A voice coil that is disposed in a magnetic gap and vibrates in a direction different from that of the diaphragm; and a rigid vibration direction converter that changes the direction of the vibration of the voice coil and transmits the vibration to the diaphragm. A wiring for voice signal input is provided between the voice coil and the wiring, and the wiring can be changed in angle with respect to the regulating part from the regulating part to the voice coil. A speaker device comprising a surplus length portion.

It is explanatory drawing of a prior art. It is explanatory drawing which showed the basic composition of the speaker apparatus which concerns on embodiment of this invention (the figure (a) is a top view, the figure (b) is sectional drawing along the X-axis direction). It is explanatory drawing which showed the basic composition of the speaker apparatus which concerns on embodiment of this invention (the assembly perspective view of a drive part). It is explanatory drawing explaining the specific aspect (voice coil and wiring) about each component of the speaker apparatus which concerns on embodiment of this invention (the figure (a) (b) is a cross-sectional top view). It is explanatory drawing explaining the specific aspect (a magnetic circuit and a voice coil) about each component of the speaker apparatus which concerns on embodiment of this invention. It is explanatory drawing explaining the specific aspect (a magnetic circuit and a voice coil) about each component of the speaker apparatus which concerns on embodiment of this invention. It is explanatory drawing explaining the specific aspect (a magnetic circuit and a voice coil) about each component of the speaker apparatus which concerns on embodiment of this invention. It is explanatory drawing explaining the specific aspect (vibration direction conversion part) about each component of the speaker apparatus which concerns on embodiment of this invention. It is explanatory drawing explaining the specific aspect (voice coil and wiring) about each component of the speaker apparatus which concerns on other embodiment of this invention (the figure (a) (b) is a cross-sectional top view, the figure (C) (d) is a perspective view of wiring. It is explanatory drawing explaining the specific aspect (voice coil and wiring) about each component of the speaker apparatus which concerns on other embodiment of this invention (the figure (a) is a cross-sectional top view, the figure (b). (C) is a cross-sectional view of the wiring). It is explanatory drawing explaining the specific aspect (voice coil and wiring) about each component of the speaker apparatus which concerns on other embodiment of this invention (transverse plan view). It is explanatory drawing explaining the specific aspect (voice coil and wiring) about each component of the speaker apparatus which concerns on other embodiment of this invention (transverse plan view). It is explanatory drawing explaining the specific aspect (voice coil and wiring) about each component of the speaker apparatus which concerns on other embodiment of this invention (transverse plan view). It is explanatory drawing explaining the specific aspect (voice coil and wiring) about each component of the speaker apparatus which concerns on other embodiment of this invention (transverse plan view). It is explanatory drawing explaining the specific aspect (voice coil and wiring) about each component of the speaker apparatus which concerns on other embodiment of this invention (transverse plan view). It is explanatory drawing explaining the specific aspect (voice coil and wiring) about each component of the speaker apparatus which concerns on other embodiment of this invention (the figure (a) is a cross-sectional top view, the figure (b). Is a cross-sectional view along the Y-axis direction). It is explanatory drawing which showed the structural example of the vibration direction conversion part in other embodiment of this invention. It is explanatory drawing explaining the specific aspect (vibration direction conversion part) about each component of the speaker apparatus which concerns on other embodiment of this invention. It is explanatory drawing explaining the specific aspect (vibration direction conversion part) about each component of the speaker apparatus which concerns on other embodiment of this invention. It is explanatory drawing explaining the specific aspect (vibration direction conversion part) about each component of the speaker apparatus which concerns on other embodiment of this invention. It is explanatory drawing which showed the electronic device carrying the speaker apparatus based on embodiment of this invention. It is explanatory drawing which showed the motor vehicle carrying the speaker apparatus based on embodiment of this invention.

A speaker device according to an embodiment of the present invention includes a stationary part and a vibrating part that is supported by the stationary part so as to be able to vibrate. The stationary part includes a magnetic circuit that forms a magnetic gap. A diaphragm, a voice coil that is disposed in the magnetic gap and vibrates in a direction different from that of the diaphragm, and a rigid vibration direction converter that converts the vibration of the voice coil and transmits the vibration to the diaphragm. It is characterized by that.

In the speaker device having such a feature, when an audio signal is input to the voice coil, Lorentz force is generated in the voice coil disposed in the magnetic gap of the magnetic circuit, and the voice coil is moved with respect to the vibration direction of the diaphragm. It vibrates in a different direction, preferably along a direction orthogonal to the vibration direction of the diaphragm. On the other hand, the vibration direction conversion unit functions to change the direction of the vibration of the voice coil and transmit it to the diaphragm. The diaphragm vibrates along a vibration direction different from the voice coil (for example, orthogonal to the voice coil) by the driving force transmitted through the vibration direction conversion unit.

In the case of a general speaker device, for example, a voice coil bobbin is disposed on the back side of the diaphragm, and the vibration direction of the diaphragm and the vibration direction of the voice coil bobbin are configured in the same direction. Since a region for vibrating the diaphragm and the voice coil bobbin along the direction is required, the width (overall height) along the acoustic radiation direction of the speaker device is relatively large.

On the other hand, in the speaker device according to the embodiment of the present invention, a magnetic circuit that forms a magnetic gap formed in a direction different from the vibration direction of the diaphragm, preferably in a direction orthogonal to the vibration direction of the diaphragm. And a voice coil that vibrates along its magnetic circuit, and also has a rigid vibration direction converter that changes the direction of vibration of the voice coil and transmits it to the diaphragm. The width along the radial direction is relatively small. That is, a thin speaker device can be provided. Further, since the vibration stroke of the voice coil can be set in a direction that does not affect the overall height of the speaker device, it is easy to achieve a thin speaker device even when the vibration stroke of the voice coil, that is, the amplitude of the diaphragm is increased. This makes it possible to achieve both a reduction in the thickness of the speaker device and an increase in volume.

Furthermore, in the speaker device according to the embodiment of the present invention, a wiring for inputting an audio signal is provided between the stationary portion and the voice coil, and the wiring includes a regulating portion in which movement of the wiring is regulated, Since the regulation part is provided with an extra length part that can change the angle with respect to the regulation part from the regulation part to the voice coil, the wiring that electrically connects the voice coil and the audio signal input terminal is used for vibration of the voice coil. Even if the wiring is arranged in a relatively small space without vibrating continuously, it makes contact with the members (voice coil, voice coil support, frame, yoke, magnet, plate, etc.) constituting the speaker. Generation of sound can be suppressed. Moreover, since excessive tension does not act on the wiring, occurrence of disconnection can be suppressed.
Furthermore, it is possible to prevent the wiring from entering the magnetic circuit, particularly the magnetic gap, and it is possible to prevent unnecessary vibrations from occurring in the voice coil.

In particular, the extra length portion side end portion of the restricting portion is provided in a space extending along the vibration direction of the voice coil, between the side surface of the voice coil and the side surface of the stationary portion, or Voice signal input without suppressing the vibration of the voice coil by being provided in the space between the side surface of the voice coil and the side surface of the stationary part that extends in the direction intersecting the vibration direction of the voice coil A predetermined tension is applied to the wiring for use to suppress the generation of unnecessary vibration, the generation of abnormal noise due to contact between the wiring and the members constituting the speaker device, and the vibration of the wiring propagates to the voice coil or the like. It is possible to suppress the occurrence of unnecessary vibration in the voice coil.

In addition, by forming the end portion on the surplus length portion side of the restriction portion into a shape that can be bent or refracted, a tension or a braking force can be applied to the surplus length portion, and a member constituting the wiring and the speaker device; It is possible to suppress the occurrence of contact noise and abnormal noise accompanying the contact.

By increasing the rigidity of the restricting portion with respect to the surplus length portion, tension or braking force can be applied to the surplus length portion, and the wiring and the members constituting the speaker device come into contact with each other. Can be prevented.

Hereinafter, embodiments of the present invention will be described more specifically based on the drawings.

[Overall configuration; FIGS. 2 to 4]
2 to 4 are explanatory views showing the basic configuration of the speaker device according to the embodiment of the present invention. 2A is a plan view (the diaphragm is shown in phantom lines and shows a state where the diaphragm is removed), and FIG. 2B is a cross-sectional view taken along the line AA in FIG. 3 is an assembly perspective view (the frame is shown in phantom), and FIGS. 4A and 4B are transverse plan views. The speaker device 1 includes a stationary part 100 and a vibration part 200 that is supported by the stationary part 100 so as to freely vibrate. The vibration part 200 is a diaphragm that is supported so as to be able to vibrate with respect to the stationary part 100 such as a frame. And a voice coil that vibrates in a direction different from the vibration direction of the diaphragm, and a rigid vibration direction converter that changes the direction of the vibration of the voice coil and transmits it to the vibration member.

In the speaker device 1 according to the embodiment of the present invention, the vibration plate 10, the frame 12 that supports the vibration plate 10 so as to vibrate freely along the vibration direction, and the frame 12 are vibrated. The drive unit 14 includes a magnetic circuit 20 that forms a magnetic gap 20G along a direction different from the vibration direction of the diaphragm 10, and a voice coil 30 that is supported in the magnetic gap 20G. And a voice coil support portion 40 that can vibrate along the magnetic gap 20G, and a rigid vibration direction conversion portion 50 that changes the direction of the vibration of the voice coil support portion 40 and transmits it to the diaphragm 10. The vibration unit 200 includes at least the vibration plate 10, the voice coil 30, and the vibration direction conversion unit 50. The voice coil support unit 40 is also included in the vibration unit 200 as necessary. In the drawing, the vibration direction of the voice coil support section 40 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. In the illustrated example, the voice coil 30 is supported by the voice coil support portion 40 and the voice coil 30 and the voice coil support portion 40 are vibration generating members. However, the present invention is not limited to this, and the voice coil 30 itself has rigidity. And the voice coil 30 may vibrate integrally with the vibration direction conversion unit 50. In addition, when the voice coil 30 has rigidity, the voice coil support part 40 may not be used.

The diaphragm 10 is supported by the frame 12 so as to vibrate along the vibration direction (Z-axis direction) as shown in the figure. The diaphragm 10 emits sound waves in the acoustic radiation direction when the speaker is driven. The diaphragm 10 is supported by the frame 12 through the edge 11, and movement along the direction other than the vibration direction, specifically, the X-axis direction and the Y-axis direction is restricted by the edge 11. The edge 11 and the diaphragm 10 may be integrally formed. In the embodiment of the present invention, a portion that does not vibrate actively due to the vibration of the voice coil 30 is the stationary portion 100. Therefore, the constituent members of the frame 12 and the magnetic circuit 20 become the stationary part 100, and the diaphragm 10 is supported so as to vibrate with respect to the stationary part 100.

As a material for forming the vibration plate 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 employed. The diaphragm 10 preferably has rigidity, for example. The diaphragm 10 can be formed in a defined shape such as a flat plate shape, a dome shape, or a cone shape. In the illustrated example, the diaphragm 10 is formed in a flat plate shape, and is supported along the planar bottom surface 12 A of the frame 12. As an embodiment of the present invention that aims to achieve a reduction in thickness, a flat diaphragm 10 is particularly preferable. Further, the diaphragm 10 can be formed in a defined shape such as a rectangular shape, an elliptical shape, a circular shape, or a polygonal shape (planar shape) viewed from the acoustic radiation direction. The diaphragm 10 may have a honeycomb structure.

Further, if necessary, a protrusion may be formed on the front surface (surface on the acoustic radiation side) or the back surface (surface opposite to the acoustic radiation side) of the diaphragm 10. The protrusion has a function of increasing the rigidity of the diaphragm 10. The protrusions may be formed in a linear shape, an annular shape, or a lattice shape with respect to the surface of the vibration plate 10. For example, a plurality of linear protrusion portions may be formed on the surface of the vibration plate.

The diaphragm 10 is supported by the frame 12 so as to freely vibrate, and a space surrounded by the diaphragm 10 and the frame 12 on the back side (the opposite side to the acoustic radiation direction) of the diaphragm 10 is relative to the acoustic radiation direction. In the case where it is blocked, it is possible to prevent sound waves emitted from the back side of the diaphragm 10 from being emitted toward the acoustic radiation direction.

The edge 11 is disposed between the diaphragm 10 and the frame 12, and the inner peripheral portion supports the outer peripheral portion of the diaphragm 10 and the outer peripheral portion is joined to the frame 12. Hold. Specifically, the edge 11 supports the diaphragm 10 so that it can vibrate along the vibration direction (Z-axis direction) and brakes in a direction orthogonal to the vibration direction. The illustrated edge 11 is formed in a ring shape (annular) when viewed from the acoustic radiation direction, and the cross-sectional shape is formed in a prescribed shape, for example, a convex shape, a concave shape, a corrugated shape, or the like. The illustrated edge 11 is formed in a concave shape in the acoustic radiation direction, but may be formed in a convex shape in the acoustic radiation direction. The edge 11 can employ, for example, leather, cloth, rubber, resin, those obtained by applying a sealing process thereto, a member obtained by molding rubber, resin, or the like into a prescribed shape.

The drive unit 14 includes a magnetic circuit 20, a voice coil support unit 40, and a vibration direction conversion unit 50. The magnetic circuit 20 forms a magnetic gap 20G along a direction (for example, the X-axis direction) different from the vibration direction (for example, the Z-axis direction) of the diaphragm 10. In the illustrated example, the magnetic gap 20G is formed along the direction orthogonal to the vibration direction of the diaphragm 10, but the invention is not particularly limited thereto. The voice coil support unit 40 has a voice coil 30 supported in the magnetic gap 20G and vibrates along the magnetic gap 20G. The direction of vibration of the voice coil support unit 40 is linearly restricted by a holding unit 60, which will be described later, and movement in only the direction along the magnetic gap 20G is permitted. Lorentz force acts on the voice coil 30 in the gap 20G, and the voice coil support portion 40 vibrates integrally with the voice coil 30.

The frame 12 supports the vibration plate 10 so as to freely vibrate along the vibration direction and supports the driving unit 14 inside. Further, the frame 12 supports a part of a link mechanism of a vibration direction conversion unit 50 described later, and applies a reaction force from the frame 12 to the operation of the link mechanism. Such a frame 12 preferably has a planar bottom surface 12A.

The frame 12 is also a stationary part 100 that is stationary with respect to the operation of the voice coil 30 as described above. Here, the stationary portion 100 refers to a portion that does not vibrate actively due to the vibration of the voice coil 30, and does not necessarily mean a completely stationary state. Therefore, for example, it is sufficient that the diaphragm 10 is stationary to the extent that the diaphragm 10 can be supported, and the vibration generated when the speaker device 1 is driven may propagate and the vibration may be generated in the entire stationary portion. The stationary unit 100 according to the embodiment of the present invention is not only a part of the frame 12 and the magnetic circuit 20 but also a mounting portion where the speaker device 1 is mounted and a member that is mechanically integrated with the magnetic circuit 20. Etc.

The frame 12 shown in FIG. 2 has a rectangular planar shape and a concave cross-sectional shape when viewed from the acoustic radiation direction (SD). As shown in the figure, the frame 12 includes a bottom plate portion 12B having a rectangular planar shape, and a rectangular tubular portion standing from the outer periphery of the bottom plate portion 12B toward the acoustic radiation direction (SD). 12C, and an opening 12D is formed at the top. Further, the magnetic circuit 20 is disposed on the bottom plate portion 12B, the outer peripheral portion of the edge 11 is joined to the upper end portion of the cylindrical portion 12C with an adhesive or the like, and the opening portion 12D is supported via the edge 11. A diaphragm 2 is disposed. In the illustrated example, a flat outer peripheral edge 12E extending inward is formed at the upper end of the cylindrical portion 12B, and the edge 11 is joined to the outer peripheral edge 12E. As a material for forming the frame 12, for example, a known material such as resin or metal can be used. Further, instead of the frame 12, a yoke 22 constituting a magnetic circuit 20 described later may have the same shape as the frame 12 described above and support the edge 11 and the like.

Further, as shown in FIG. 2 (b), the frame 12 has a hole 12F formed in, for example, a side surface or a bottom surface. The hole 12F functions as a vent hole, for example. For example, when the vent hole is not provided, when the speaker is driven, the vibration of the diaphragm 2 may be reduced due to the spring in the air surrounded by the diaphragm 10 and the frame 12 as the diaphragm 10 vibrates. is there. On the other hand, in the illustrated example, since the hole portion 12F is provided, such vibration reduction of the diaphragm 10 can be suppressed. The hole 12F functions to radiate heat from the magnetic circuit 20 and the voice coil 30. The hole 12F is a signal for electrically connecting the voice coil 30 and an audio signal generation source 300 such as an amplifier, equalizer, tuner, broadcast receiver, and television provided outside the speaker device 1, for example. It may be used as a hole through which a line passes.

Between the stationary part 100 and the voice coil 30, a wiring 31 for voice signal input is provided. The wiring 31 is routed from the voice coil 30 toward the stationary part 100 such as the frame 12 and is connected to the connection terminal part 13 disposed on the stationary part 100, so that the voice coil 30 and the outside are electrically connected. It is connected. 4A and 4B show the movement of the wiring 31 due to the vibration of the voice coil 30. FIG. The wiring 31 includes a restriction part 32 in which the movement of the wiring 31 is restricted, and a surplus part 33 that extends from the restriction part 32 to the voice coil 30 and whose angle can be changed with respect to the restriction part 32. At least the end portion 34 positioned on the surplus length portion 33 side of the restriction portion 32 is formed in a shape that can be bent or refracted, so that tension or braking force acts on the surplus length portion 33. In the illustrated example, the wiring 31 is continuously formed from the voice coil 30 to the connection terminal portion 13 and is divided into a restriction portion 32 and an extra length portion 33 in the middle thereof. The lead wire drawn out from the coil 30 is formed along the voice coil support portion 40 to the end thereof, and the end of the lead wire and one end of the wiring (lead wire) 31 are electrically connected. Good.

Further, at least an end portion 34 positioned on the surplus length portion 33 side of the restricting portion 32 extends between the side surface of the voice coil 30 and the side surface of the stationary portion 100 extending along the vibration direction of the voice coil 30 (for example, the X-axis direction). You may arrange | position in the space S1 formed in between. Alternatively, at least the end portion 34 located on the surplus length portion 33 side of the restriction portion 32 extends in the direction intersecting the vibration direction of the voice coil 30 (for example, the Y-axis direction) and the side surface of the voice coil 30 and the stationary portion 100. You may arrange | position in the space S2 formed between side surfaces. Or you may arrange | position the edge part 34 located in the surplus length part 33 side of the control part 32 over both the space S1 and the space S2. In the illustrated example, the wiring 31 has the restricting portion 32 on the stationary portion 100 side and the extra length portion 33 on the voice coil 30 side, and a part of the restricting portion 32 is an end portion on the stationary portion 100 side. On the contrary, the restricting portion 32 may be disposed on the voice coil 30 side, the surplus length portion 33 may be disposed on the stationary portion 100 side, and a part of the restricting portion 32 may be an end portion on the voice coil 30 side.

The vibration direction converter 50 changes the direction of the vibration of the voice coil 30 and transmits it to the diaphragm 10. The vibration direction conversion unit 50 includes a rigid link portion 51, and vibrates with the voice coil 30 by a reaction force received from the stationary portion 100 such as the frame 12 with respect to the vibration of the voice coil 30 and the vibration of the voice coil 30. The link portion (first link portion) 51 A formed between the plate 10 and the plate 10 is changed in angle, and the direction of vibration of the voice coil 30 is changed and transmitted to the plate 10.

According to such an embodiment of the present invention, for example, an audio signal is sent from the audio signal generation source 300 to the audio signal input terminal provided in the frame 10, and further from the audio signal input terminal to the voice coil 30 of the voice coil support unit 40. When an audio signal is input, the voice coil support 40 vibrates along a magnetic gap 20G formed along a direction different from the allowable vibration direction of the diaphragm 10, and this vibration is the vibration direction. The direction is changed by the conversion unit 50 and transmitted to the diaphragm 10, and the diaphragm 10 is vibrated to emit a sound corresponding to the sound signal in the acoustic radiation direction SD.

At this time, since the direction of the magnetic gap 20G intersects the vibration direction of the diaphragm 2 and the thickness direction of the speaker device 1, the driving force of the magnetic circuit 20 or the vibration stroke of the voice coil support portion 40 can be increased. It does not directly affect the size of the speaker device 1 in the thickness direction (Z-axis direction). Therefore, it is possible to reduce the thickness of the speaker device 1 while increasing the volume. Further, structurally, it is possible to make the thickness of the speaker device 1 thinner than the vibration stroke of the voice coil support portion 40, so that the thickness can be easily reduced.

Further, 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. Furthermore, since the angle conversion of the link portion 51 is performed in response to the reaction force from the frame 12, the vibration from the voice coil support portion 40 can be transmitted to the diaphragm more reliably. As a result, it is possible to obtain good reproduction efficiency of the speaker device 1, and in particular, it is possible to obtain good reproduction characteristics in the high sound range by reliably transmitting the vibration of the voice coil 30 to the diaphragm.

Furthermore, the wiring 31 that electrically connects the voice coil 30 and the connection terminal portion 13 of the stationary portion 100 applies tension or braking force to the surplus length portion 33 by the restriction portion 32. Therefore, when the wiring 31 is wired in a relatively narrow space in the frame 12, members constituting the speaker (for example, the voice coil 30, the voice coil support portion 40, the frame 12, the yoke 22, the magnet 21, which will be described later, and the later described). The plate 22 and the like) can be prevented from generating abnormal noise. Further, the voice coil 30 can be vibrated with a desired amplitude. In addition, the above-described wiring 31 does not come into contact with members constituting the speaker, so that unnecessary space inside the frame 3 can be reduced, and the entire speaker device can be reduced in size and thickness.

In the above-described example, only the case where the vibration plate 200 or the like (vibration unit 200) vibrated with respect to the stationary unit 100 such as the frame 10 is vibrated by the input of the audio signal has been described. However, the present invention is not limited thereto. Instead, depending on the frequency of the audio signal input to the vibration generating member such as the voice coil 30, the stationary part 100 may vibrate with respect to the vibrating part 200.

Hereinafter, specific modes of each component of the speaker device 1 according to the present embodiment will be described.

[Magnetic circuit and voice coil; Fig.5 to Fig.7]
The magnetic circuit 20 for vibrating the voice coil 30 not only forms a magnetic gap 20G along the vibration direction of the voice coil support portion 40, but also has a voice wound in a plane on the voice coil support portion 40. In order to apply a Lorentz force to the voice coil 30 by passing a current flowing through the coil 30 (sound current accompanying the sound signal), the magnetic gap 20G forms a pair of magnetic fields in opposite directions. 5 to 7, a pair of magnetic gaps 20G are formed, but the present invention is not limited to this, and the magnetic circuit 20 may include only one magnetic gap 20G.

That is, the magnetic circuit 20 is formed by the magnet 21 and the yoke 22, and is formed by arranging a pair of magnetic gaps 20G (20G1, 20G2) having magnetic field directions opposite to each other in the Z-axis direction at predetermined intervals in the X-axis direction. is doing. Then, by winding the voice coil 30 so that the currents flowing in the magnetic gap 20G (20G1, 20G2) are opposite to each other in the Y-axis direction, the Lorentz force along the X-axis direction acts on the voice coil 30. I have to. In the illustrated example, the voice coil 30 has a pair of

linear portions

30A and 30C, and the voice coil 30 has a pair of magnetic portions so that reverse current flows through the

linear portions

30A and 30C through the pair of magnetic gaps 20G1 and 20G2. It arrange | positions so that the gaps 20G1 and 20G2 may be circulated.

By changing the arrangement of the magnet 21 and the yoke 22, various forms of the magnetic circuit 20 can be formed with the same function. In the example shown in FIGS. 5 and 6, the magnetic circuit 20 has a plurality of magnets 21 (21A to 21D). In the magnetic circuit 20, the magnets 21 are provided on both sides along the direction of the magnetic field of the magnetic gap 20G.

In the illustrated example, the yoke 22 includes a lower yoke portion 22A, an upper yoke portion 22B, and a column portion 22C. The

yoke portions

22A and 22B are disposed substantially parallel to each other with a specified interval, and the column portion 22C is formed at the center portion so as to extend in a direction substantially orthogonal to the

yoke portions

22A and 22B. .

Magnets 21A to 21D are arranged in the

yoke portions

22A and 22B, and one magnetic gap 20G2 is formed by the magnet 21A and the magnet 21C, and another magnetic gap 20G1 is formed by the magnet 21B and the magnet 21D. The pair of magnetic gaps 20G1 and 20G2 are formed side by side in a plane, and magnetic fields in opposite directions are formed.

On the other hand, the voice coil 30 is formed in a substantially rectangular planar shape, and includes

linear portions

30A and 30C formed along the Y-axis direction and

linear portions

30B and 30D formed along the X-axis direction. It is configured. The

straight portions

30A and 30C of the voice coil 30 are arranged in the magnetic gap 20G of the magnetic circuit 20, and are defined so that the direction of the magnetic field is along the Z-axis direction. It is preferable not to apply a magnetic field to the

straight portions

30B and 30D of the voice coil 30. Further, even when a magnetic field is applied to the

straight portions

30B and 30D, the Lorentz forces generated in the

straight portions

30B and 30D are configured to cancel each other. By making the number of turns of the voice coil 30 relatively large, a part of the voice coil 30 disposed in the magnetic gap 20G can be made relatively large, and a relatively large driving force can be obtained when the speaker is driven. it can.

The voice coil support portion 40 includes a voice coil 30 wound in a planar shape, and is formed to be movable along different directions with respect to the vibration direction of the diaphragm 10. In the illustrated example, the frame 12 is disposed so as to be capable of vibrating along a magnetic gap 20 G formed along the planar bottom surface 12 A of the frame 12. More specifically, the voice coil support portion 40 according to the present embodiment is formed to be movable only along the X-axis direction, and movement is restricted in other directions. The restriction of the movement range of the voice coil support part 40 is provided with the holding part 60 as restriction means in the present embodiment, but is not limited to this form. For example, a restricting means such as a rail, a guide member, or a groove portion can be provided.

In addition, the voice coil support portion 40 includes a voice coil 30 disposed in the magnetic gap 20G of the magnetic circuit 20, and a planar insulation having a shape extending from the voice coil 30 to the outside of the magnetic gap 20G along the moving direction. A member 41 is provided. Further, the voice coil support portion 40 has an opening 41A, and the voice coil 30 is provided along the outer periphery of the opening 41A. The voice coil support portion 40 having such a structure can have a structure in which the voice coil 30 is embedded in the insulating member 41, whereby the strength of the voice coil 30 can be reinforced, and the voice coil 30 can be reinforced. Distortion or deflection can be reduced.

In the example shown in the figure, the opening 41A is loosely fitted to the support 22C of the magnetic circuit 20, and the movement range of the voice coil support 40 is restricted in this state. Specifically, the opening 41A is formed in a rectangular shape, and the interval between both sides along the moving direction of the voice coil support portion 40 is formed to be approximately the same as or larger than the width of the column portion 22C. The interval between both sides in the direction orthogonal to the direction is formed to be relatively large corresponding to the movement range of the voice coil support portion 40.

In the example shown in FIG. 6, the magnetic circuit 20 includes a plurality of magnets 21 A so that the direction of the magnetic field related to the straight part 30 A of the voice coil 30 is opposite to the direction of the magnetic field related to the straight part 30 C. ˜21D, magnet 21A and magnet 21C are magnetized in the same direction, and magnet 21B and magnet 21D are magnetized in the same opposite direction. Magnetization of the magnet 21 can be performed after the magnet 21 and the yoke 22 are assembled, but in the example shown in FIGS. 3 and 4, it is necessary to perform the magnetizing process at that time twice.

On the other hand, in the example shown in FIG. 7, the magnetic gap 20G2 is formed by

magnets

21A and 21C magnetized in the same direction, and the magnetic gap 20G1 is formed on the

yoke protrusions

22a and 22B formed on the

yoke portions

22A and 22B, respectively. It is formed between 22b. According to this, the magnetizing process performed after assembling the magnet 21 and the yoke 22 can be completed once, and the process can be simplified. Although not shown, the magnetic circuit 20 is configured such that the magnetic gaps 20G1 and 20G2 are each composed of a magnet and a yoke protrusion, or one of the magnetic gaps 20G1 and 20G2 is composed of a magnet and a yoke, and the other is 2 There are cases in which it is composed of two magnets or two yoke portions.

[Vibration direction conversion unit; FIG. 2, FIG. 3, FIG. 8]
The vibration direction converter 50 is a link portion (first link) formed between the voice coil support 40 and the diaphragm 10 by the vibration of the voice coil support 40 and the reaction force received from the stationary part 100 such as the frame 12. (Part) A link mechanism for changing the angle of 51A is provided. Specifically, in the example shown in FIGS. 2 and 3, the first link portion 51 A having one end as a joint portion 52 A with the voice coil support portion 40 and the other end as a joint portion 52 B with the diaphragm 10; The second link portion 51B has one end as a joint portion 52C with the intermediate portion of the first link portion 51A and the other end as a joint portion 52D with the frame 12, and the first link portion 51A and the second link portion 51B The two link portions 51B are inclined and arranged in different directions with respect to the vibration direction of the voice coil support portion 40 (for example, the X-axis direction).

The link part here is a part for forming a link mechanism and is basically a part that does not deform (has rigidity) and has joint parts at both ends thereof. The joint can be formed by joining two members in a rotatable manner, or can be formed as a refracted portion where one member can be refracted at an arbitrary angle. In the example shown in FIG. 2B, the joint portion 52 D is supported by a support portion 12 G that is a stationary portion 100 formed to protrude on the bottom surface 12 A of the frame 12. Further, the stationary portion 100 may be a yoke 22 instead of the frame 12, and when the yoke 22 is a stationary portion, the above-described support portion 12 G may be disposed on the yoke 22.

In the example shown in FIGS. 2 and 3, the vibration direction converter 50 includes a first link portion 51A, a second link portion 51B, and

joint portions

52A, 52B, 52C, and 52D that form a link mechanism 50L. . In this example, the joint portion 52D between the second link portion 51B and the stationary portion 100 such as the frame 12 is a joint portion where the position is not displaced, and the other

joint portions

52A, 52B, 52C are joint portions whose positions are displaced. ing. As a result, the entire link mechanism 50L is structured to receive a reaction force from the stationary portion 100 at the joint portion 52D. In this link mechanism 50L, when the joint portion 52A moves in the X-axis direction due to the vibration of the voice coil support portion 40, the joint portion 52B moves along the Z-axis direction, and the vibration of the voice coil support portion 40 is directed in the direction. This is converted and transmitted to the diaphragm 10.

The vibration direction converter 50 according to the embodiment of the present invention can be formed by a plate-like member having a linear refracting portion, and this refracting portion can be used as the joint portion of the link mechanism 50L described above. That is, in the illustrated example, the first link portion 51A and the second link portion 51B are formed by plate members, and the

joint portions

52A, 52B, 52C, and 52D of the link mechanism 50L are formed by linear refracting portions. be able to. According to this, since the joining portion with the diaphragm 10 can be joined linearly, the planar diaphragm 10 can be vibrated uniformly along the width direction, and the entire diaphragm is substantially omitted. It is possible to vibrate with the same phase. That is, it is possible to reproduce the high-frequency region particularly by suppressing the occurrence of divided vibration. In addition, since each link portion has rigidity, vibrations in the natural vibration mode are less likely to occur, the flexural vibration of the link portion is prevented from adversely affecting the vibration of the diaphragm 10, and the acoustic characteristics are reduced. Can be suppressed.

Although the vibration direction conversion unit 50 according to the present embodiment is not shown, for example, a vent hole may be formed. The vent hole can reduce local fluctuations in the air pressure in the space surrounded by the diaphragm 10 and the frame 12 when the speaker vibrates, and suppresses braking of the vibration direction converter 50 due to the air pressure. Further, for example, a hollow portion is formed in the link portion by the vent hole, and the link portion can be reduced in weight, thereby enabling high-frequency reproduction. Further, the weight reduction of the vibration direction converter is particularly effective for widening the reproduction characteristics and increasing the amplitude and sound pressure level of the sound wave for a predetermined audio current.

Further, the vibration direction conversion unit 50 may be made of an integral part connected by a refracting unit. In this case, the vibration direction changing part 50 forming a complicated link mechanism can be immediately joined to the voice coil support part 40 and the diaphragm 10, and the assemblability of the apparatus is improved. Moreover, the vibration direction conversion part 50 can also be formed integrally with the voice coil 30 (including the voice coil support part 40) and the diaphragm 10, for example.

The

joints

52A, 52B, 52C, and 52D included in the vibration direction conversion unit 50 may be configured by mechanical joints (joints) or by fibers made of a polymer such as polyester or polyaramid. Or a member made of polyurethane resin or rubber, or a flexible member such as a flexible film. In addition, for example, the voice coil 30 and the vibration direction conversion unit 50 are integrally formed of a specified material such as a resin material, and are subjected to processing so as to be bent or bent at a predetermined position, thereby performing

joint portions

52A, 52B, 52C, 52D may be formed.

FIG. 8 is an explanatory diagram for explaining the operation of the vibration direction converter 50 in the embodiment of the present invention. Specifically, FIG. 8B shows the state of the vibration direction converter 50 with the diaphragm 10 positioned at the reference position, and FIG. 8A shows the state where the diaphragm 10 is displaced toward the acoustic radiation side with respect to the reference position. FIG. 8C 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. Show.

As described above, the joint portion 52D is the only joint portion whose position does not fluctuate and is supported by the stationary portion 100 such as the frame 12 and applies a reaction force from the stationary portion 100 to the link mechanism 50L. As a result, when the voice coil support portion 40 moves from the reference position X0 by X1 in the X-axis direction, as shown in FIG. 8A, the first link portion 51A and the second link portion 51A inclined in different directions are arranged. The angle of the link portion 51B rises substantially the same angle, and the joint portion 52B reliably pushes up the diaphragm 10 from the reference position Z0 in the Z-axis direction by Z1 in response to the reaction force from the stationary portion 100 at the joint portion 52D. When the voice coil support portion 40 moves from the reference position X0 by X2 in the direction opposite to the X axis, as shown in FIG. 8C, the angles of the first link portion 51A and the second link portion 51B are almost equal. The joint portion 52B receives the reaction force from the stationary portion 100 at the joint portion 52D, and the joint portion 52B reliably pushes down the diaphragm 10 from the reference position Z0 in the direction opposite to the Z axis by Z2.

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 it is preferable that the joint 52A and the joint 52D are disposed substantially parallel to the moving direction of the voice coil support 40. Such a link mechanism is known as a Scott Russell mechanism, and the

joint portions

52A, 52B, and 52C are on the circumference of the length of the first link portion 51A (a + b = 2a) around the joint portion 52D. 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 is always a right angle. As a result, when the voice coil support portion 40 is moved in the X-axis direction, the joint portion 52B between the first link portion 51A and the diaphragm 10 always moves along the Z-axis that is perpendicular to the X-axis. The vibration direction of the voice coil support part 40 can be transmitted to the diaphragm 10 by converting it to a direction perpendicular to the vibration direction.

[Holding part; FIGS. 2 and 3]
The holding unit 60 holds the voice coil 30 at a specified position in the magnetic gap 20G so that the voice coil 30 does not contact the magnetic circuit 20, and can move the voice coil 30 along the vibration direction (X-axis direction). I support it. The holding unit 60 restricts the voice coil 30 from moving in a direction different from the vibration direction of the voice coil 30, such as the Z-axis direction or the Y-axis direction, with respect to the stationary unit 100 such as the frame 12.

The holding unit 60 according to the present embodiment is a flexible damper formed in, for example, a plate shape, and its cross-sectional shape is a convex shape, a concave shape, a corrugated shape, and various shapes such as a uniform thickness and a non-uniform thickness. It may be formed. The holding portion 60 has one end joined to the side surface of the voice coil 30 and the other end joined to the side surface of the frame 12. In the illustrated example, the holding portion 60 is disposed between two edges of the voice coil support portion 40 in the Y-axis direction, and constitutes a side surface 42A extending along the X-axis direction and a cylindrical portion 12C of the frame 12. A plurality of side surfaces 12H extending along the X-axis direction are arranged at predetermined intervals in the X-axis direction. Further, the holding part 60 has rigidity in the Z-axis direction.

Further, the holding unit 60 is not limited to this form, and for example, one end may be joined to the voice coil 30 and the other end may be joined to the magnetic circuit 20. For movement restriction or support of the voice coil 30, for example, a rail, a groove, a step, a guide member, or the like may be provided between the stationary part 100 such as the frame 12 instead of the holding part 60 described above. That is, the speaker device 1 can also have a structure in which the voice coil 30 slides in a state in which the end of the voice coil 30 is fitted to a rail, a groove, a step, or the like.

[Wiring for audio signal input; Fig. 2 to Fig. 4]
The audio signal input wiring 31A shown in FIGS. 2 to 4 includes a guide member 35 that guides the end portion 34A located on the surplus length portion 33A side of the restriction portion 32A so as to be bent or bent, and both ends of the restriction portion 32A. A bent portion 32A1 formed between the portions, and an elastic member 36 that elastically supports the bent portion 32A1 with respect to the frame 12. The guide member 35 is a rotating portion (pulley) that is rotatably supported with respect to the frame 12 via a support shaft 35A. The guide member 35 is formed in a concave portion 35B formed on the outer peripheral surface facing the wiring 31A. The end 34A is supported. The elastic member 36 is a spring or the like, one end of which is connected to the bent portion 32A1 of the restricting portion 32A, and the other end is connected to a fixed shaft 36A provided on the bottom surface 12A of the frame 12, whereby the bent portion 32A1 of the restricting portion 32A. The surplus length portion 33A is elastically supported so that a predetermined tension acts on the frame 12.

Furthermore, the wiring 31A has an end 34A of the restricting portion 32A formed between the side surface portion 42A of the voice coil support portion 40 extending along the X-axis direction and the side surface portion 12H of the frame 12 extending in the X-axis direction. Arranged in the space S1. The space S1 is partitioned in the X-axis direction into a first space S11 formed between the holding unit 60 and a second space S12 formed on the frame 12 side adjacent to the space S11. In other words, the holding portion 60 serves as a boundary, the space S1 is divided into two spaces, and a space S11 and a space S12 along the X-axis direction are formed.
Of the space S1, the end portion 34A of the restricting portion 32A is arranged in the second space S12. Specifically, one end of the wiring 31A is drawn from the corner of the voice coil 30 facing the frame 12 across the second space S12, and is connected to the side surface 12H in the X-axis direction of the frame 12. The other end of the wiring 31A is connected to the terminal portion 13A. In the illustrated example, the end portion 34A (one end) of the restricting portion 32A has a shape bent in a substantially U shape along the concave portion 35B of the guide member (rotating portion) 35. On the other hand, a part of the restricting portion between the end portion (the other end) of the restricting portion 34A located on the connection terminal portion 13A side and the end portion 34A is a bent portion 32A1 having a shape bent substantially in a V shape. ing. Therefore, the wiring 31A has a shape in which the entire wiring 31A is substantially Z-shaped, and is elastically supported by the frame 12. In the example shown in the figure, the wiring 31A has a single lead wire with a “+” pole and a “−” pole, and a wire that is bundled, but is not limited to this. The “−” pole lead wire may be routed as the wire 31A, or a plurality of wires 31A may be routed.

According to such an embodiment, as shown in FIGS. 4A and 4B, the end 34 A of the restricting portion 32 A moves along the rotating portion of the guide member 35 as the voice coil 30 vibrates. Or reciprocate. In addition, when the voice coil 30 vibrates toward the vibration direction conversion unit 50 with the vibration of the voice coil 30, the surplus portion 33A is deformed into a straight line (a stretched shape), and the voice coil 30 is converted into the vibration direction conversion unit. When vibrating to the opposite side with respect to 50, the surplus portion 33A is deformed into a substantially U shape (a slack shape). At this time, a part of the surplus part 33A moves, and the elastic member 36 such as a spring elastically expands and contracts to apply tension and braking force to the surplus part 33A. Thus, without suppressing the vibration of the voice coil 30, a predetermined tension is applied to the wiring 31 A, the generation of unnecessary vibration is suppressed, and the members constituting the wiring 31 A and the speaker device (voice coil 30, voice coil) The noise generated by the contact with the support portion 40, the frame 12, the yoke 22, the magnet 21, the plate 22 described later, and the like) can be suppressed. Further, it is possible to prevent the vibration of the wiring 31 A from propagating to the voice coil 30 or the like and causing unnecessary vibration in the voice coil 30. Moreover, you may arrange | position so that the rotation part of the guide member 35 may be elastically supported with respect to the flame | frame 12. As shown in FIG.

9 to 16 are explanatory views of a speaker device 1 according to another embodiment of the present invention, and show modifications of the audio signal input wiring 31 (FIGS. 9A and 9B). 10A and 11 to 16A are cross-sectional plan views, FIGS. 9C and 9D are perspective views of wiring, FIGS. 10B and 10C are cross-sectional views of wiring, and FIG. b) is an AA cross-sectional view in FIG. Portions common to the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

In the embodiment shown in FIGS. 9A and 9B, the regulation portion 32B of the wiring 31B is formed so as to be larger than the rigidity of the surplus length portion 33B, whereby tension and braking force act on the surplus length portion 33B. Like to do. As an example of means for improving the rigidity of the restricting portion 32B, means shown in FIGS. 9C and 9D can be given. As a means shown in FIG. 9C, the restricting portion 32B is formed by using an elastically deformable member (spring member) 32S having a larger rigidity than the extra length portion 33, and the spring member 32S is formed into a flat plate shape. The conductive portion 32T such as a conductive wire or a conductive layer is integrally formed along one of the front and back surfaces. Further, as a means shown in FIG. 9D, the spring member 32S has a predetermined bent shape, and a conductive portion 32T such as a conductive wire or a conductive layer is integrally formed along one of the front and back surfaces. That is. The leading end portion of the conductive portion 32T is electrically connected to the surplus length portion 33B.
The wiring 31B is disposed in the first space S11. Specifically, one end of the wiring 31B is drawn from a part (intermediate position) of the linear portion 30B of the voice coil 30 facing the side surface portion 12H of the frame, and the other end of the wiring 31B is the side surface portion 12H of the frame 12. Are electrically connected to the connecting terminal portion 13B. In the illustrated example, the restricting portion 32B and the surplus length portion 33B are each formed in a straight line, and the restricting portion 32B and the surplus length portion 33B are set so that the angle formed by the restricting portion 32B and the surplus length portion 33B is a predetermined angle. The connecting portion is bent and elastically supported so that the entire wiring 31B is substantially L-shaped.
In addition, as a member that can be elastically deformed, a metal member such as phosphor bronze as a spring member, a resin film having a predetermined thickness, a woven or non-woven fabric made of fibers, or a woven fabric or non-woven fabric is impregnated with resin or the like Examples include members (fiber-based members).

According to such an embodiment, as shown in FIGS. 9A and 9B, the end portion 34B of the restricting portion 32B is elastically deformed along with the vibration of the voice coil 30, and tension or tension is applied to the extra length portion 33B. Apply braking force. In particular, when the voice coil 30 vibrates toward the vibration direction conversion unit 50, the angle between the restriction portion 32B and the surplus length portion 33B increases, and a part of the surplus length portion 33B moves, The tension and braking force by the restricting portion 32B are applied. For this reason, unnecessary vibration generated in the wiring 31B can be suppressed while a predetermined tension is applied to the wiring 31B without suppressing the vibration of the voice coil 30. Further, it is possible to suppress the generation of abnormal noise due to the contact between the wiring 31B and members constituting the speaker device (voice coil 30, voice coil support portion 40, frame 12, yoke 22, magnet 21, plate 22 described later, etc.). it can. Further, it is possible to prevent the vibration of the wiring 31B from propagating to the voice coil 30 or the like and causing unnecessary vibration in the voice coil 30. The restricting portion 32B is a part of the wiring. However, the spring member 32S may be used as a conductor by using a conductive metal member or the like for the spring member 32S. The conductivity can be made relatively low. The means for improving the rigidity of the restricting portion 32B is not limited to using the spring member 32S described above, and may use a rigidity adding member described later. Any member that can be elastically deformed may be used, and the member used may be a member having conductivity or a member having insulation.

The embodiment shown in FIG. 10A is a modification of the embodiment shown in FIGS. 9A and 9B, and the movement of the wiring 31C due to the vibration of the voice coil 30 is indicated by a solid line and a two-dot chain line. . In this embodiment, the wiring 31C has a linear conductive member 32U that is electrically connected to the surplus length portion 33C via the end 34C of the restricting portion 32C, and a rigidity added member that is formed along the conductive member 32U. By having 32V, it is shown that tension and braking force act on the surplus portion 33C.
For example, as shown in FIG. 10 (b), a reinforcing member made of a resin material such as varnish, adhesive, polyurethane resin, or the like is coated around the conductive member 32U made of a conducting wire or the like as the rigidity adding member 32V. 10 (c), means for improving the rigidity of the restricting portion 32C of the wiring 31C by winding a spring member or the like that can be elastically deformed as the rigidity adding member 32V around the conductive member 32U made of a conductive wire or the like. As mentioned. In the illustrated example, the wiring 31C has “+” and “−” pole lead wires, and the “+” and “−” pole lead wires are substantially symmetrical with each other in the Y-axis direction. However, the present invention is not limited to this, and as shown in FIGS. 4A and 4B, as shown in FIGS. 4A and 4B, a wiring 31C in which lead wires of “+” poles and “−” poles are integrated or bundled, The wiring 31C (the wiring 31C that is the “+” pole, the wiring 31C that is the “−” pole) may be routed.

According to such an embodiment, as shown by the solid line and the alternate long and two short dashes line in FIG. 10A, the bending portion of the end portion 34C of the restricting portion 32C is elastically deformed due to the vibration of the voice coil 30. A part of the long portion 33C moves, and tension and braking force act on the surplus length portion 33C. In particular, when the voice coil 30 vibrates toward the vibration direction conversion unit 50, the angle between the restricting portion 32C and the surplus length portion 33C increases, and tension and braking force by the restricting portion 32C act on the surplus length portion 33C. For this reason, it is possible to suppress unnecessary vibration generated in the wiring 31C while applying a predetermined tension to the wiring 31C without suppressing the vibration of the voice coil 30. In addition, it is possible to suppress the generation of abnormal noise due to contact between the wiring 31C and members constituting the speaker device (the boss coil 30, the voice coil support portion 40, the frame 12, the yoke 22, the magnet 21, the plate 22 described later, and the like). . Further, it is possible to prevent the vibration of the wiring 31 C from propagating to the voice coil 30 or the like and causing unnecessary vibration in the voice coil 30. Further, the restricting portion 32C is a part of the wiring, but the reinforcing member 32V is coated with a reinforcing material such as varnish or adhesive around the conductive member 32U, or an elastically deformable spring member is wound around the conductive member 32U. As a result, the rigidity of the restricting portion 32C can be improved, and occurrence of unnecessary vibration in the wiring 31C can be suppressed. The restricting portion 32C is a part of the wiring. However, when the spring member 32S is used as a conductor by using a conductive metal member or the like for the spring member 32S, the conductivity of the restricting portion 32C is increased. It can be relatively low.

10A, the restricting portion 32C is disposed on the frame 12 side, and the surplus length portion 33C is disposed on the voice coil 30 side. Without being limited to this embodiment, the restriction portion 32C may be disposed on the voice coil 30 side, and the surplus length portion 33C may be disposed on the frame 12 side, and the occurrence of unnecessary vibration in the wiring 31C is suppressed. If possible, it may be changed as appropriate. Further, the movement of the restricting portion 32C is restricted by using the rigidity adding member 32V. However, the restriction portion 32C is not limited to this, and instead of the rigidity adding member 32V, for example, the restricting portion 32C has the diameter or thickness of the surplus length portion 33C. It is also possible to use means such as increasing rigidity by adding rigidity, or adding rigidity by making the length of the restricting portion 32C relatively shorter than the length of the extra length portion 33C. Further, in order to restrict the movement of the restricting portion 32C, the restricting portion 32C may be provided with a shape that is not easily deformed (for example, a refracting portion). Further, when the restricting portion 32C is disposed on the voice coil 30 side, the above-described means can be used in a timely manner.

Further, when the restricting portion 32C is disposed on the frame 12 side, a part of the restricting portion 32C (the end portion on the frame 12 side) is connected or restrained to the frame 12 as shown in FIG. If the restricting portion 32C is disposed on the voice coil 30 side, a part of the restricting portion 32C may be connected to or restricted by the voice coil 30. That is, it is sufficient that the movement of the restricting portion 32C is restricted, and the rigidity of the restricting portion 32C may be increased as compared to the surplus length portion 33C, or a refracting portion or the like may be formed in the restricting portion 32C. Absent.

In the embodiment shown in FIG. 11, the end 34D of the restricting portion 32D of the wiring 31D is arranged in the second space S12. Specifically, one end of the wiring 31D is drawn out from the corner of the voice coil 30 facing the frame 12 across the second space S12. Further, the other end of the wiring 31D is connected to the connection terminal portion 13D disposed on the side surface portion 12H of the frame 12 extending in the X-axis direction. In the illustrated example, the surplus length portion 33D is bent into a substantially V shape, and similarly, the end portion 34D of the restricting portion 32D is also bent into a substantially V shape, and the entire wiring 31D is substantially Z-shaped. And is elastically supported with respect to the frame 12. In the above-described embodiment, this embodiment, or an embodiment described later, a bent shape is also included as a bent shape. Further, the extra length portion 33D and the end portion 34D of the restricting portion 32D may have a particularly refracted shape among the bent shapes.

According to such an embodiment, as shown by the solid line and the alternate long and two short dashes line in FIG. 11, the bending portion of the end portion 34 D and the surplus length portion 33 D are elastically deformed with the vibration of the voice coil 30. Thus, a part of the surplus length portion 33D moves, and tension and braking force act on the surplus length portion 33D. In particular, when the voice coil 30 vibrates toward the vibration direction converter 50, the angle between the restricting portion 32D and the surplus length portion 33D increases, and the tension and braking force by the restricting portion 32D act on the surplus length portion 33D. For this reason, unnecessary vibration generated in the wiring 31D can be suppressed while a predetermined tension is applied to the wiring 31D without suppressing the vibration of the voice coil 30. Moreover, generation | occurrence | production of the noise by contact with the member (Voice coil 30, the voice coil support part 40, the frame 12, the yoke 22, the magnet 21, the plate 22 mentioned later, etc.) which comprises the wiring 31D and a speaker apparatus is suppressed. it can. Further, it is possible to prevent the vibration of the wiring 31D from propagating to the voice coil 30 or the like and causing unnecessary vibration in the voice coil 30.

In the embodiment shown in FIG. 12, the end portion 34E (voice coil 30 side) of the restricting portion 32E of the wiring 31E is connected to the side surface portion (end edge) 42B of the voice coil support portion 40 extending in the Y-axis direction, and the Y-axis. It arrange | positions in the space S2 formed between the side parts 12I of the flame | frame 12 extended in the direction. Specifically, one end of the wiring 31E is drawn out from a part (intermediate position or almost center position) of the linear part 30C of the voice coil 30 extending in the Y-axis direction, and a part (intermediate part) of the side part 12I of the frame 12 The other end of the wiring 31E is connected to the connection terminal portion 13E arranged at the position or substantially the center position. In the illustrated example, only the end portion 34E of the restricting portion 32E is bent, and the entire wiring 31E has a substantially V shape or a substantially U shape and is elastically supported with respect to the frame 12. Note that a part of the description common to the embodiment shown in FIG. 11 is omitted.

According to such an embodiment, as shown by the solid line and the alternate long and two short dashes line in FIG. 11, the end 34E of the restricting portion 32E is elastically deformed along with the vibration of the voice coil 30, thereby The part moves, and tension and braking force act on the surplus part 33E. In particular, when the voice coil 30 vibrates toward the vibration direction converter 50, the angle between the restricting portion 32E and the surplus length portion 33E increases, and the tension and the braking force by the restricting portion 32E act on the surplus length portion 33E. For this reason, unnecessary vibration generated in the wiring 31E can be suppressed while a predetermined tension is applied to the wiring 31E without suppressing the vibration of the voice coil 30. Further, it is possible to suppress the generation of abnormal noise due to contact between the wiring 31E and the members constituting the speaker device (voice coil 30, voice coil support portion 40, frame 12, yoke 22, magnet 21, plate 22 described later, etc.). it can. Further, it is possible to prevent the vibration of the wiring 31 E from propagating to the voice coil 30 or the like and causing unnecessary vibration in the voice coil 30.

In the embodiment shown in FIG. 13, the end portion 34F of the restricting portion 32F of the wiring 31F is arranged in the space S2, and a part (intermediate position, or almost central position) of the straight portion 30C of the voice coil 30 extending in the Y-axis direction. ) Is pulled out from one end of the wiring 31F, and the other end of the wiring 31F is connected to the connecting terminal portion 13F disposed at a part (intermediate position or substantially central position) of the side surface portion 12I of the frame 12 extending in the Y-axis direction. Are connected. In the illustrated example, the surplus length portion 33F is bent into a substantially V shape or a substantially U shape, and the end portion 34F of the restricting portion 32F is bent into a substantially V shape so that the entire wiring 31F has a substantially Z shape. The frame 12 is elastically supported. In addition, a part of description is omitted about the part which is common in embodiment shown by FIG. 11, FIG.

According to such an embodiment, as shown by the solid line and the alternate long and two short dashes line in FIG. 13, the bending portion of the end portion 34F of the restriction portion 32F and the surplus length portion 33F are elastically deformed with the vibration of the voice coil 30. Thus, a part of the surplus portion 33F moves, and tension and braking force act on the surplus portion 33F. In particular, when the voice coil 30 vibrates toward the vibration direction converter 50, the angle between the restricting portion 32F and the surplus length portion 33F increases, and the tension and braking force by the restricting portion 32F act on the surplus length portion 33F. For this reason, it is possible to suppress unnecessary vibration generated in the wiring 31F while applying a predetermined tension to the wiring 31F without suppressing the vibration of the voice coil 30. In addition, it is possible to suppress the generation of abnormal noise due to contact between the wiring 31F and members constituting the speaker device (voice coil 30, voice coil support portion 40, frame 12, yoke 22, magnet 21, plate 22 described later, etc.). it can. Further, it is possible to prevent the vibration of the wiring 31F from propagating to the voice coil 30 or the like and causing unnecessary vibration in the voice coil 30.

The embodiment shown in FIG. 14 is a modification of the embodiment shown in FIG. 12, and one end of the wiring 31G is drawn from a part (end part) of the linear part 30C of the voice coil 30 extending in the Y-axis direction. The other end of the wiring 31G is connected to a connection terminal portion 13G arranged at a part (intermediate position or in the vicinity of the end portion) of the side surface portion 12I of the frame 12 extending in the Y-axis direction. In the illustrated example, only the end portion 34G of the restricting portion 32G is bent, and the entire wiring 31G is substantially V-shaped or U-shaped and elastically supported with respect to the frame 12. Note that a part of the description common to the embodiment shown in FIG.

According to such an embodiment, as shown by the solid line and the two-dot chain line in FIG. 14, the end 34G of the restricting portion 32G is elastically deformed along with the vibration of the voice coil 30, thereby The portion moves, and tension and braking force act on the extra length portion 33G. In particular, when the voice coil 30 vibrates toward the vibration direction conversion unit 50, the angle between the restricting portion 32G and the surplus length portion 33G increases, and the tension and braking force by the restricting portion 32G act on the surplus length portion 33G. For this reason, unnecessary vibration generated in the wiring 31G can be suppressed while a predetermined tension is applied to the wiring 31G without suppressing the vibration of the voice coil 30. In addition, it is possible to suppress the generation of abnormal noise due to contact between the wiring 31G and members constituting the speaker device (voice coil 30, voice coil support 40, frame 12, yoke 22, magnet 21, plate 22 described later, etc.). it can. Further, it is possible to prevent the vibration of the wiring 31G from propagating to the voice coil 30 or the like and causing unnecessary vibration in the voice coil 30. In addition, the overall length of the wiring 31G can be ensured relatively longer than that of the embodiment shown in FIG. 11, and the amount of movement (movable) that part of the extra length portion 33G moves with the vibration of the voice coil 30. Length) can be increased.

The embodiment shown in FIG. 15 is a modification of the embodiment shown in FIG. 13, and one end of the wiring 31H is drawn from the position (end) of the linear portion 30C of the voice coil 30 extending in the Y-axis direction. The other end of the wiring 31H is connected to the connection terminal portion 13H arranged at a part (substantially the center position) of the side surface portion 12I of the frame 12 extending in the Y-axis direction. In the illustrated example, the surplus length portion 33H is bent into a substantially V shape, the end portion 34H of the restricting portion 32H is bent into a substantially V shape, and the entire wiring 31H becomes a substantially Z shape with respect to the frame 12. Elastically supported.

According to such an embodiment, as shown by the solid line and the alternate long and two short dashes line in FIG. 15, the bent portion of the end portion 34H of the restricting portion 32H and the surplus length portion 33H are elastically deformed with the vibration of the voice coil 30. Thus, a part of the surplus length portion 33H moves, and tension and braking force act on the surplus length portion 33H. In particular, when the voice coil 30 vibrates toward the vibration direction conversion unit 50, the angle between the restricting portion 32H and the surplus length portion 33H increases, and tension and braking force by the restricting portion 32H act on the surplus length portion 33H. For this reason, unnecessary vibration generated in the wiring 31H can be suppressed while a predetermined tension is applied to the wiring 31H without suppressing the vibration of the voice coil 30. Further, it is possible to suppress the generation of abnormal noise due to contact between the wiring 31G and members constituting the speaker device (voice coil 30, voice coil support portion 40, frame 12, yoke 22, magnet 21, plate 22 described later, etc.). it can. Further, it is possible to prevent the vibration of the wiring 31H from propagating to the voice coil 30 or the like and causing unnecessary vibration in the voice coil 30. In addition, the entire length of the surplus length portion 33H can be secured relatively longer than that of the embodiment shown in FIG. 13, and the amount of movement (a part of the surplus length portion 33H moves with the vibration of the voice coil 30) ( The length that can be moved) can be increased.

The embodiment shown in FIG. 16A is a modification of the embodiment shown in FIG. 11, and the wiring 31D has lead wires of “+” poles and “−” poles, and these “+” poles and “ The “−” pole leads are routed so as to be substantially symmetrical with respect to the Y-axis direction. As shown in FIG. 16 (b), a through hole 42C is formed in the voice coil support portion 40 that supports the voice coil 30, and any one of the aforementioned wirings 31D is inserted into the through hole 42C. Thus, the wiring 31D is separately routed along the front surface side and the back surface side of the voice coil support portion 40.

According to such an embodiment, since the lead wires of the “+” pole and “−” pole of the wiring 31D are separately routed along the front surface side and the back surface side of the voice coil support portion 40, the voice coil 30 It is possible to prevent the lead wires of the “+” pole and the “−” pole from coming into contact with each other.

In the embodiment shown in FIG. 16A, the lead wires of the “+” pole and the “−” pole are drawn out in directions opposite to each other. For example, one of the lead wires of the “+” pole and the “−” pole is drawn from the voice coil 30 along the acoustic radiation direction, and the other is drawn from the voice coil 30 in the direction opposite to the acoustic radiation direction. The present invention is not limited to this embodiment, and can be appropriately changed as in the example given below. For example, the lead wires of the “+” pole and the “−” pole can be drawn from the voice coil 30 in the same direction. In addition, the electrical connection portion (connecting portion) between the lead wire of the “+” pole and the “−” pole and the voice coil 30 is connected to the surface of the voice coil support portion 40 (the surface on the acoustic irradiation side or the acoustic radiation side). It is provided on the surface opposite to the voice coil 30, in particular, on the surface facing the voice coil 30. Also, one or both of the connecting portions of the voice coil 30 and the lead wires of the “+” pole and the “−” pole may be provided on a surface formed opposite to the surface facing the voice coil 30. Can be mentioned. When the voice coil 30 is formed by winding a conducting wire, one of the lead wires of the “+” pole and the “−” pole that is electrically connected to the beginning of the winding of the voice coil 30. It is mentioned that the lead wire is drawn to the outside of the voice coil 30 so as to cross the voice coil 30, and at this time, a part of the lead wire is connected or restrained to the voice coil 30. . In addition, both the “+” pole and the “−” pole lead wires pass through the plurality of through holes 42 C formed in the voice coil support portion 40 and are drawn to the outside of the voice coil 30. Can be mentioned. In addition, an opening is formed in the plane of the frame 12 (stationary portion) facing the voice coil 30, and the lead wires of the “+” pole and the “−” pole are passed through the opening to electrically connect with the outside. It is possible to connect them.

17 to 20 show configuration examples of the vibration direction conversion unit 50 according to another embodiment of the present invention. Portions common to the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted. Each of the embodiments shown in FIGS. 17A and 17B has two features, one of which is that vibration direction conversion sections 50 are provided at both ends of the voice coil support section 40 in the vibration direction. The parallel links are formed by the link portions of the vibration direction conversion units 50 provided at both ends, and another feature is that a pair of drive units 14 are provided and the vibration direction conversion units 50 are substantially left and right in the X-axis direction. It is symmetrically arranged opposite to each other.

A speaker device 1A shown in FIGS. 17A and 17B includes a pair of left and right drive units 14 (R) and 14 (L) for each diaphragm 10, and the drive unit 14 ( R) and 14 (L) are provided symmetrically. That is, the drive unit 14 (R) is provided with the magnetic circuit 20 (R) and the voice coil support unit 40 (R), and the end of the voice coil support unit 40 (R) on the center side of the diaphragm 10 is the first. One link portion 51A (R) and a second link portion 51B (R) are provided, and one end of the voice coil support portion 40 (R) is connected to the voice coil support portion 40 (R) at one end. An outer link portion 53 (R) having a portion 53A (R) and a joint portion 53B (R) with the diaphragm 10 at the other end is provided. Similarly, the drive unit 14 (L) is provided with a magnetic circuit 20 (L) and a voice coil support unit 40 (L), and at the end of the voice coil support unit 40 (L) on the center side of the diaphragm 10. The first link portion 51A (L) and the second link portion 51B (L) are provided, and one end of the voice coil support portion 40 (L) is connected to the voice coil support portion 40 (L). An outer link portion 53 (L) having a joint portion 53A (L) and a joint portion 53B (L) with the diaphragm 10 at the other end is provided.

The speaker device 1A shown in FIG. 17A has a first link in the vibration direction converter 50 provided at the center side end of the diaphragm 10 of the voice coil supporters 40 (R) and 40 (L). The joint part 52B with the diaphragm 10 of the parts 51A (R) and 51A (L) is a common part, and the joint part 52D with the frame 12 of the second link parts 51B (R) and 51B (L). It is a common part. Accordingly, a diamond-shaped link mechanism is formed by the

joint portions

52B, 52C (R), 52C (L), and 52D, and the voice coil support portions 40 (R) and 40 (L) are close to each other along the X-axis direction. The direction of the separated vibration is changed to give the vibration in the Z-axis direction (acoustic radiation direction) to the diaphragm 10. Also in this case, since the joint portion 52D is supported by the frame 12, the first link portion 51A (R) against the proximity / separation vibration of the voice coil support portions 40 (R) and 40 (L). , 51A (L) and the second link portion 51B (R), 51B (L) receive a reaction force from the frame 12, and this reaction force reliably vibrates the diaphragm 10 in the Z-axis direction. ing.

Further, the first link portion 51A (R) and the outer link portion 53 (R) provided on both sides in the vibration direction of one voice coil support portion 40 (R), or both sides in the vibration direction of the voice coil support portion 40 (L). The first link portion 51A (L) and the outer link portion 53 (L) provided in the above form a parallel link, and the voice coil support portions 40 (R) and 40 (L) move in the X direction. The first link portion 51A (R) and the outer link portion 53 (R) that are substantially parallel to each other, or the first link portion 51A (L) and the outer link portion 53 (L) are angle-converted at substantially the same angle. Become. As a result, the three

joint portions

52B, 53B (R), 53B (L) move up and down while maintaining the planar state of the diaphragm 2, and cause the planar diaphragm 10 to vibrate in substantially the same phase. Is possible. Thereby, it is possible to suppress the divided vibration of the diaphragm 10. At this time, the vibration of the pair of voice coil support portions 40 (R) and 40 (L) is required to vibrate in the opposite directions with substantially the same phase and substantially the same amplitude.

In the speaker device 1B shown in FIG. 17B, the joint portion 52B is separated into the joint portions 52B (R) and 52B (L) and spaced apart, and the joint portion 52D is connected to the joint portions 52D (R) and 52D (52). The speaker device 1A is the same as the speaker device 1A shown in FIG. Accordingly, the speaker device 1B shown in FIG. 11B has the same function as the speaker device 1A shown in FIG. 11A, but the speaker device 1B has four joint portions 52B (R) that move up and down simultaneously. , 52B (L), 53B (R), 53B (L), the diaphragm 10 moves up and down, so that the divided vibration of the diaphragm 10 can be further suppressed.

Further, in the example shown in FIGS. 17A and 17B, the magnetic circuit 20 has the plate 22 (22A, 22B), the magnet 21 (21A, 21B), and the yoke 22 (22A) as in FIG. 2A. , 22B), and a pair of

magnets

21A, 21B having magnetic poles opposite to each other in the Z-axis direction are arranged at predetermined intervals in the X-axis direction, and the pair of

magnets

21A, 21B and the yoke portion 22B The aforementioned magnetic gap 20G is formed between them. The voice coil 30 is wound so that the currents flowing on the

magnets

21A and 21B are opposite to each other in the Y-axis direction, so that the Lorentz force along the X-axis direction acts on the voice coil 30.
Of the first link portion 51A and the outer link portion 53 connected to the end of the voice coil support portion 40, for example, the outer link portion 53 is not provided, and only the first link portion is supported by the voice coil. You may employ | adopt the structure connected with the edge part of the part 40. FIG.

The embodiment shown in FIG. 18 is a case where a pair of drive units 14 are provided and the vibration direction conversion units 50 are arranged opposite to each other substantially symmetrically, and the vibration direction conversion unit 50 is formed as an integral part.

In the vibration direction conversion unit 50 according to this embodiment, one end is a joint part 52A (R), 52A (L) with the voice coil support part 40, and the other end is a joint part 52B (R), 52B with the diaphragm 10. It has a pair of 1st link parts 51A (R) and 51A (L) made into (L). Also, one end is a joint part 52C (R), 52C (L) with an intermediate part of the first link parts 51A (R), 51A (L), and the other end is a stationary part (a sixth link part 51F described later). ) And a pair of second link portions 51B (R) and 51B (L) as joint portions 52D (R) and 52D (L). Further, a pair of third link portions 51C (R) and 51C (L) integrally extending from the voice coil support portion 40 and a fourth link portion 51D fixed along the diaphragm 10 are provided. Have. Further, one end is a joint portion 52E (R), 52E (L) with the end portion of the third link portion 51C (R), 51C (L), and the other end is a joint portion 52F with the fourth link portion 51D. A pair of fifth link portions 51E (R) and 51E (L), which are (R) and 52F (L), are provided. Then, joint portions 52B (R) and 52B (L) of the first link portion 51A and the diaphragm 10 (fourth link portion 51D) are formed at both ends of the fourth link portion 51D. Joint portions 52D (R) and 52D (L) of the second link portions 51B (R) and 51B (L) and a stationary portion (sixth link portion 51F described later) are substantially equal to the fourth link portion 51D. It is formed at both ends of the sixth link portion 51F having a length. Furthermore, the first link portion 51A (R) and the fifth link portion 51E (R) or the first link portion 51A (L) and the fifth link portion 51E (L) form a parallel link, The three link portions 51C (R), 51C (L) and the fourth link portion 51D form parallel links. Further, connection portions 54 (R) and (L) with the voice coil support portion 40 are formed at the base end portion of the third link portion 51C.

The link mechanism 50L of such a vibration direction conversion unit 50 substantially has a function of symmetrically arranging the embodiments shown in FIGS. 2B and 3 symmetrically opposite to each other and combining a parallel link mechanism. Each link portion is formed by a plate-like member, each joint portion between the link portions is formed by a linear refracting portion, and the link portions are integrally formed through the refracting portion.

The operation of this vibration direction converter 50 will be described with reference to FIG. In this example, the sixth link portion 51F 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 movement of the connection portion 54 due to the vibration of the voice coil support portion 40, As a result, the third link portions 51C (R), (L) and the fourth link portion 51D forming the parallel link rise while maintaining the parallel state, and the first link forming the parallel link. The angle is changed so that the portions 51A (R) and (L) and the fifth link portions 51E (R) and (L) rise. At this time, since the joint portions 52D (L) and (R) are supported by the sixth link portion 51F that becomes the stationary portion, the first link portions 51A (R) and 51A (R), The angle change between (L) and the fifth link portions 51E (R), (L) is reliably performed, and the displacement of the joint portions 52A (R), (L) from the position X0 to the position X1 is changed. The displacement is surely converted 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 third link portions 51C (R) and (L) forming a parallel link thereby The fourth link portion 51D is lowered while maintaining a parallel state, and the first link portions 51A (R), (L) and the fifth link portions 51E (R), (L) forming the parallel links. Change the angle so that falls. 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 fifth link receive the reaction force from the stationary portion. The angle of the portions 51E (R), (L) is reliably changed, and the displacement of the joint portions 52A (R), (L) from the position X0 to the position X2 is changed from the position Z0 of the diaphragm 10 to the position Z2. Surely convert to

According to such an embodiment, the joints 52B (R), (L), 52F (R), (where the vibration in the X-axis direction of one voice coil support portion 40 vibrates with substantially the same phase and substantially the same amplitude. L) and the vibration in the Z-axis direction in the fourth link portion 51D. 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 described above, the link mechanism of the vibration direction conversion unit 50 can form each link portion with a plate-like member, and each joint portion may be formed by joining the link portions in a rotatable manner. In addition, the link portions may be connected or integrated so that they can be bent or bent. The plate-like member is preferably a highly rigid and lightweight member, and a fiber reinforced plastic film or the like can be used.

As shown in FIG. 18B, the third link portions 51C (R) and (L), the fourth link portion 51D, and the fifth link portions 51E (R) and (L) are arranged in parallel as a pair. The first link portions 51A (R) and (L) are formed in a bifurcated manner, and the joint portions 52C (R) and (L) with the second link portions 51B (R) and (L) are formed in the middle portion thereof. L) is formed, and the second link portions 51B (R), (L) and the sixth link portion 51F are paired in parallel with the third link portions 51C (R), (L), The fourth link part 51D and the fifth link part 51E (R), (L) are arranged.

By forming the link portion with a single plate-like member in this way, the diaphragm 10 can be supported and vibrated by the surface, so that the entire diaphragm 10 can be vibrated in substantially the same phase, and divided vibrations can be obtained. Can be suppressed. Moreover, although a link part can also be formed with a some plate-shaped member, a manufacturing process can be simplified by forming with one plate-shaped member. When forming a link part with one plate-shaped member, you may cut out a link member from one plane-shaped plate-shaped member.

As shown in FIG. 18 (b), the vibration direction converter 50 of this embodiment refracts the entire plate-like member forming the link portion into a convex shape, thereby forming the first link portion 51A (R), (L) and the fourth link portion 51D are formed, and the plate-like member is partially cut out and refracted into a concave shape to form the second link portions 51B (R), (L) and the sixth link portion. 51F is formed.

In addition, as shown in FIG. 18C, the vibration direction conversion portion is formed by bonding two plate-

like members

501 and 502, and the first link portion 51 A (R) is formed on one plate-like member 501. ), (L), second link portions 51B (R), (L), fourth link portion 51D, and sixth link portion 51F, and the third link portion is formed on the other plate-like member 502. 51C (R), (L) and fifth link portions 51E (R), (L) are formed. Then, along the first link portions 51A (R), (L) and the fourth link portion 51D, the third link portions 51C (R), (L) and the fifth link portions 51E (R), ( L) and an opening 502A corresponding to the second link portions 51B (R), (L) and the sixth link portion 51F is formed in the plate-like member 502.

In the example shown in FIG. 18C, the size of the opening 502A formed in the other plate-like member 502 corresponding to the second link portions 51B (R) and (L) and the sixth link portion 51F is as follows. The other plate-like member 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 sixth link portion 51F do not come into contact with the other plate-like member 502, and the link mechanism moves smoothly. be able to. The shape of the opening 502 A may be appropriately changed as necessary, and may have substantially the same width from one end of the other plate-like member 502 toward the inside.

Also, in the vicinity of each joint, an inclined surface is formed at the end of each link portion. In particular, the inclined surface is formed on the side surface opposite to the side surface of the link portion that approaches each other when the link portion is refracted at the joint, so that the link portion can be refracted efficiently at the joint. Yes.

In such an embodiment, since the link mechanism of the vibration direction changing unit can be formed only by mounting one integral part to the two opposing voice coil support units 40, the pair of drive units 14 are provided. Even when the

speaker devices

1, 1 A, 1 B are formed, the assembly work can be easily performed. Further, by providing the sixth link portion 51F supported by the stationary portion, the counter vibration of the voice coil support portion 40 (vibrating so that the plurality of voice coil support portions 40 are in opposite directions to each other). Even if the joint portions 52D (R) and (L) are not particularly supported by the frame 12, the positions of the joint portions 52D (R) and (L) are always kept constant. It is possible to simplify the incorporation of the vibration direction converter into the speaker devices 1, 1A, 1B.

As the link mechanism, the right first link portion 51A (R) and the third link portion 51C (R), the left first link portion 51A (L) and the third link portion 51C (L). Accordingly, the fourth link portion 51D fixed to the diaphragm 10 can be stably translated along the Z-axis direction with respect to the opposing vibration of the voice coil support portion 40. As a result, it is possible to apply stable vibration to the planar diaphragm 10.

The embodiment shown in FIG. 20 is an improved example of the embodiment shown in FIG. In the example shown in FIG. 20A, 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 third link portions 51C (R), (L), the sixth Convex portions 510 are provided on the link portions 51F. 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 fourth link portion 51D. 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.

As described above, the speaker device 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. 21 is an explanatory view showing an electronic apparatus including the speaker device according to the embodiment of the present invention. The electronic device 2 such as a mobile phone or a portable information terminal shown in FIG. 1A or the electronic device 3 such as a flat panel display shown in FIG. Since the space can be reduced, the entire electronic device can be made thinner. In addition, sufficient audio output can be obtained even in a thin electronic device. FIG. 22 is an explanatory view showing an automobile provided with the speaker device 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, in the case where the speaker device 1 according to the embodiment of the present invention is installed on the door panel, the protrusion of the door panel is eliminated and the operation space of the driver can be expanded. Also, since sufficient audio output can be obtained, music and radio broadcasting can be enjoyed comfortably in the car even during high-speed driving with a lot of noise.

In addition, in houses (buildings) intended for human residence, hotels, inns and training facilities (buildings) that can accommodate and host a large number of people, such as conferences, lectures, parties, etc. Since the thickness space required for the installation of the speaker device 1 can be reduced, unnecessary space can be reduced and the space 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. Note that the speaker device 1 may be arranged at, for example, a ceiling or a wall in a living room.

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.
Further, the technology in each of the above-described embodiments can be applied to a dynamic speaker device that uses a flat voice coil as necessary (eg, a riffel speaker device, a ribbon speaker device, a sound emitting side of a flat voice coil). In addition, the present invention can be applied to a speaker device in which a magnetic pole portion is disposed on the side opposite to the acoustic radiation side, and the speaker device can be thinned.
This application includes PCT / JP2008 / 051197 filed internationally on January 28, 2008, PCT / JP2008 / 068580 filed internationally on October 14, 2008, and PCT filed internationally on January 20, 2009. All contents described in / JP2009 / 050764, PCT / JP2009 / 053752 filed internationally on February 27, 2009, and PCT / JP2009 / 053592 filed internationally on February 26, 2009 are incorporated into this application. .

Claims

A stationary part, and a vibrating part supported by the stationary part so as to freely vibrate,
The stationary portion includes a magnetic circuit that forms a magnetic gap,
The vibrating part is
A diaphragm,
A voice coil disposed in the magnetic gap and vibrating in a different direction from the diaphragm;
A rigid vibration direction conversion unit that converts the direction of vibration of the voice coil and transmits the vibration to the diaphragm,
Provide wiring for voice signal input between the stationary part and the voice coil;
The speaker device according to claim 1, wherein the wiring includes a restricting portion in which movement of the wire is restricted, and an extra length portion extending from the restricting portion to the voice coil and capable of changing an angle with respect to the restricting portion.
An end portion of the restricting portion located on the extra length portion side is disposed in a space formed between the side surface of the voice coil and the side surface of the stationary portion that extends along the vibration direction of the voice coil. The speaker device according to claim 1, wherein:
An end portion of the restricting portion located on the extra length portion side is disposed in a space formed between the voice coil and a side surface of the stationary portion that extends in a direction intersecting the vibration direction of the voice coil. The speaker device according to claim 1, wherein:
The voice coil is supported by the stationary part via a holding part, and the vibration direction conversion part is provided on one end side in the vibration direction,
The space includes a first space on the vibration direction conversion unit side formed by being partitioned by the holding unit, and a second space on the opposite side to the vibration direction conversion unit,
The speaker device according to claim 2, wherein the wiring is arranged on the second space side.
The voice coil is supported by the stationary part via a holding part, and the vibration direction conversion part is provided on one end side in the vibration direction,
The space includes a first space on the vibration direction conversion unit side formed by being partitioned by the holding unit, and a second space on the opposite side to the vibration direction conversion unit,
The speaker device according to claim 2, wherein the wiring is arranged in the first space.
The speaker device according to claim 5, wherein the voice coil is supported by the stationary part via a plurality of holding parts, and the wiring is provided between the holding parts.
3. The speaker device according to claim 2, wherein an end of the restricting portion on the extra length side is formed in a shape that can be bent or refracted.
A rotating part supported rotatably with respect to the stationary part;
The speaker device according to claim 7, wherein an end portion of the restricting portion on the side of the extra length portion is supported by a concave portion formed on a surface of the rotating portion facing the voice coil.
The speaker device according to claim 7, wherein the restriction portion has higher rigidity than the extra length portion.
The speaker device according to claim 8, wherein the rotating unit is supported by the stationary unit so as to be rotatable through a support shaft.
The speaker device according to claim 10, wherein the restricting portion has a bent portion between both end portions thereof.
The speaker device according to claim 11, wherein the bent portion is supported by the stationary portion via an elastic member.
The speaker device according to claim 8, wherein the restricting portion is formed of at least an elastic member, and a conductive portion is provided along the elastic member.
The speaker device according to claim 8, wherein the restricting portion includes a linear conductive member electrically connected to the surplus length portion and a rigidity adding member provided along the conductive member.
The restricting portion is disposed on the stationary portion side, and the extra length portion is disposed on the voice coil side,
The speaker device according to claim 1, wherein a part of the restricting portion having a predetermined length is connected or restrained to the stationary portion.
The speaker device according to claim 15, wherein a part of the restricting portion is an end portion on the stationary portion side.
The surplus part is disposed on the stationary part side, and the restricting part is disposed on the voice coil side,
The speaker device according to claim 1, wherein a part of the restricting portion having a predetermined length is connected or restrained to the voice coil.
The speaker device according to claim 17, wherein a part of the restricting portion is an end portion on the voice coil side.
Among the plurality of wirings,
One of the wires is drawn out from the voice coil along the acoustic radiation direction,
The speaker device according to claim 1, wherein the other wiring is drawn out from the voice coil in a direction opposite to a direction of acoustic radiation.
The connecting portion between the voice coil and the one wiring is provided on the acoustic radiation side of the voice coil,
The speaker device according to claim 19, wherein a connection portion between the voice coil and the other wiring is provided on a side opposite to an acoustic radiation side of the voice coil.
A voice coil support part for supporting the voice coil;
20. The connecting portion between the voice coil and the one wiring and the connecting portion between the voice coil and the other wiring are provided on the surface of the voice coil supporting portion. The speaker device according to 1.
An opening is formed in the surface of the stationary part facing the voice coil,
The speaker device according to claim 1, wherein the wiring is electrically connected to the outside through the opening.
The speaker device according to claim 1, wherein the vibration unit includes a voice coil support unit that supports the voice coil.
The speaker device according to claim 1, wherein the stationary part is a frame.
2. The speaker device according to claim 1, wherein the stationary portion is a yoke constituting the magnetic circuit.
The speaker device according to claim 1, wherein the magnetic circuit includes at least a magnet and a yoke.
The vibration direction converter has one end connected to the voice coil directly or through another member so that the angle can be changed, and the other end can be directly changed to the diaphragm via the other member. Connected,
The speaker device according to claim 1, wherein the speaker device is disposed obliquely with respect to each of a vibration direction of the diaphragm and a moving direction of the voice coil.
The speaker device according to claim 1, wherein the vibration direction conversion unit includes a link mechanism that changes an angle of a link portion formed between the voice coil and the diaphragm.
29. The speaker device according to claim 28, wherein the link mechanism performs angle conversion in response to a reaction force from the stationary portion where the link portion is located on the side opposite to the diaphragm side.
An automobile comprising the speaker device according to claim 1.
An electronic apparatus comprising the speaker device according to claim 1.
A building comprising the speaker device according to claim 1.