WO2010097974A1 - スピーカ装置用ボイスコイル、スピーカ装置 - Google Patents
スピーカ装置用ボイスコイル、スピーカ装置 Download PDFInfo
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- WO2010097974A1 WO2010097974A1 PCT/JP2009/062477 JP2009062477W WO2010097974A1 WO 2010097974 A1 WO2010097974 A1 WO 2010097974A1 JP 2009062477 W JP2009062477 W JP 2009062477W WO 2010097974 A1 WO2010097974 A1 WO 2010097974A1
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- WIPO (PCT)
- Prior art keywords
- voice coil
- speaker device
- vibration direction
- diaphragm
- vibration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
- H04R9/047—Construction in which the windings of the moving coil lay in the same plane
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
- H04R2209/024—Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
- H04R9/063—Loudspeakers using a plurality of acoustic drivers
Definitions
- the present invention relates to a voice coil for a speaker device and 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, this 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 portion 51J, the magnet 52J, and the plate 53J, and the voice coil 611J are arranged.
- a magnetic circuit having a magnetic gap formed thereon 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.
- the general dynamic speaker device described above has a voice coil 611J disposed on the side opposite to the acoustic radiation side of the diaphragm 21J, and vibration directions of the voice coil 611J and the voice coil bobbin 610J. And the vibration direction of the diaphragm 21J is the same.
- the region for vibrating the diaphragm 21J, the region for vibrating the voice coil bobbin 610J, the region where the magnetic circuit is disposed, and the like along the vibration direction (acoustic radiation direction) of the diaphragm 21J.
- the overall height of the speaker device must be relatively large.
- the size of the diaphragm 21J of the speaker device along the vibration direction is the same as the size of the cone-shaped diaphragm 21J along the vibration direction, and the diaphragm 21J is supported by the frame 3J.
- the magnetic circuit mainly includes a magnet height (d) corresponding to the height from the upper surface of the yoke 51J to the yoke 51J, and the magnetic circuit mainly includes a thickness (e) of the yoke portion 51J.
- the vibration direction of the voice coil bobbin 610J and the vibration direction of the diaphragm 21J are the same direction, if the amplitude of the diaphragm 21J is increased to obtain a large volume, In order to ensure the vibration stroke of the voice coil bobbin 610J, the overall height of the speaker device becomes large, and it is difficult to achieve thinning of the device. That is, there is a problem that it is difficult to achieve both a reduction in device thickness and an increase in volume.
- the vibration of the voice coil 611J is directly transmitted to the diaphragm 21J, that is, the vibration direction of the voice coil 611J and the vibration direction of the diaphragm 21J.
- the vibration direction of the voice coil 611J and the vibration direction of the diaphragm 21J are different, the vibration of the voice coil 611J may not be reliably transmitted to the diaphragm 21J, which causes a problem that the reproduction efficiency of the speaker device is deteriorated. Arise.
- the voice coil bobbin 610J is joined to the inner periphery of the cone-shaped diaphragm 21J, and the driving force is transmitted from the voice coil bobbin 610J to the inner periphery of the diaphragm 21J. It is relatively difficult to drive the entire diaphragm at substantially the same phase. Therefore, a speaker device that can drive the entire diaphragm with substantially the same phase is desired.
- a capacitor type speaker device is known as a thin speaker device.
- This capacitor type speaker device has a structure in which a diaphragm (movable electrode) and a fixed electrode are arranged facing each other.
- the diaphragm is displaced by applying a DC voltage between the electrodes, and when a signal on which an audio signal is superimposed is input to the electrodes, the diaphragm vibrates according to the signal.
- the driving force may change significantly in a non-linear manner, and the sound quality of the reproduced sound may be relatively low.
- the present invention is an example of a problem to deal with such a problem. That is, to provide a thin speaker device that can radiate a large volume of reproduced sound with a relatively simple structure, to reliably transmit the vibration of the voice coil to the diaphragm, and to obtain a speaker device with high reproduction efficiency, Provided is a thin speaker device capable of emitting high-quality reproduced sound with a relatively simple structure, and also provides a thin speaker device in which a diaphragm vibrates in substantially the same phase with a relatively simple configuration. This is the object of the present invention.
- a voice coil for a speaker device and a speaker device have at least the following configurations.
- One is a voice coil that is used in a speaker device that transmits vibration in one axial direction of a voice coil to a diaphragm via a rigid vibration direction converter, and vibrates the diaphragm in a direction different from the one axial direction.
- the voice coil includes a conductive member that is planar and annularly wound, and has a rigidity in at least a vibration direction along the planar direction.
- the driving unit includes the voice coil according to claim 1, a magnetic circuit that vibrates the voice coil, a vibration plate that transmits vibration from the driving unit by an audio signal, and the driving unit. And a stationary part that supports the diaphragm, the drive unit includes a vibration direction conversion unit that converts the angle of the vibration of the voice coil and transmits the vibration to the diaphragm, and the vibration direction conversion unit includes the vibration A speaker device comprising a rigid link portion provided obliquely with respect to a vibration direction of a plate and a vibration direction of the voice coil.
- a driving unit including a conductive coil wound in an annular shape and having a voice coil having rigidity at least in a vibration direction, and a magnetic circuit that vibrates the voice coil, and vibration from the driving unit by an audio signal
- a stationary part that supports the driving part and the diaphragm, and the driving part includes a rigid vibration direction converting part that converts the angle of the vibration of the voice coil and transmits the vibration to the diaphragm.
- the vibration direction changing portion is connected to the voice coil directly or via another member so that the angle can be changed, and at the other end directly or other member to the diaphragm so that the angle can be changed.
- a rigid link portion obliquely provided with respect to each of the vibration direction of the diaphragm and the vibration direction of the voice coil.
- the voice coil for the speaker device transmits vibrations in one axial direction of the voice coil to the diaphragm via the rigid vibration direction conversion unit, and vibrates the diaphragm in a direction different from the one axial direction.
- the voice coil is made of a conductive member that is planar and annularly wound, and has a rigidity with respect to at least a vibration direction along the planar direction.
- the voice coil itself can be made thinner as compared with a conventional voice coil formed in a cylindrical shape, which makes it possible to make the entire speaker device thinner.
- the speaker device to which this voice coil is applied transmits vibrations in one axial direction of the voice coil to the vibration plate via the rigid vibration direction conversion unit, and the vibration plate is in a direction different from the vibration in the one axial direction of the voice coil. Since it vibrates, the vibration direction of the voice coil does not directly affect the overall height of the speaker device. As a result, it is possible to obtain a large volume reproduced sound in which the vibration of the voice coil is increased while achieving a reduction in the thickness of the speaker device.
- the vibration of the voice coil can be reliably transmitted to the diaphragm via the rigid vibration direction changing part, and the speaker with high reproduction efficiency while realizing thinning and large volume.
- a device can be obtained.
- rigidity refers to a property that hardly causes bending, buckling, or resonance, and does not mean only complete rigidity.
- the above-described voice coil for speaker device is characterized in that it has rigidity by being supported by a rigid base.
- the conductive material of the voice coil itself can be selected from any material.
- the above-described voice coil for speaker device is characterized in that the conductive member is disposed on the surface of the base. According to this, by arranging the conductive member on the surface of the planar substrate, it is possible to easily form a planar and rigid voice coil.
- the voice coil for speaker device described above is characterized in that an annular step portion is formed on the base body, and the conductive member is disposed on the step portion.
- the annular conductive member can be positioned in the annular step portion of the base, and the thickness of the conductive member can be fitted into the recess of the step portion, so that the thickness of the voice coil itself is not bulky, A conductive member can be disposed on the substrate.
- the above-described voice coil for speaker device has a base and a conductive member formed in an annular shape and has an opening, so that the portion of the opening is thinned and the weight of the voice coil can be reduced. Further, the weight of the base can be reduced, and the voice coil can be vibrated with high sensitivity to the driving force generated in the voice coil.
- the voice coil for a speaker device has a conductive member partly placed and joined to a rigid placement portion formed from the inner periphery of the base toward the inside, the conductive member Can be integrated with the voice coil, and the voice coil can be reliably vibrated by the driving force generated in the conductive member.
- the above-described voice coil for speaker device is characterized in that a conductive member is sandwiched between at least two substrates. According to this feature, since the conductive member is held by the rigid base, the conductive member can be protected by the rigid base.
- the above-described voice coil for speaker device is characterized in that an internal filling member is disposed so as to fill a gap between two substrates. According to this, since the gap between the bases generated by sandwiching the conductive member between the two bases is filled with the internal filling member, the rigidity of the entire voice coil including the conductive member and the base can be further increased. In addition, if there is a gap between the substrates, the substrate may vibrate and an abnormal noise may be generated, so-called 'squealing' phenomenon may occur. By filling this gap with an internal filling member, the 'squealing' phenomenon can be suppressed. Can do.
- the above-described voice coil for speaker device is characterized in that the internal filling member is more rigid than the base.
- the rigidity of the entire voice coil including the inner filling member, the conductive member, and the base can be further increased by the rigidity of the inner filling member.
- by increasing the rigidity of the internal filling member over that of the base body it is possible to suppress abnormal noise generated by the base body being bent, and to efficiently transmit the vibration of the voice coil by suppressing the base body deflection. be able to.
- the voice coil for speaker device described above is characterized in that the internal filling member is made of the same material as the base. According to this feature, the integrity of the entire voice coil including the internal filling member, the conductive member, and the base can be improved. In other words, it is possible to make the difference between the resonance frequency of the internal filling member and the resonance frequency of the substrate relatively small, and to suppress the generation of a specific resonance frequency.
- the above-described voice coil for speaker device is characterized in that the thickness of the base is thinner than the thickness of the internal filling member or the conductive member. According to this, by reducing the thickness of the base, the thickness of the entire voice coil can be reduced without affecting the conductive member.
- the above-described voice coil for speaker device is characterized in that a conductive layer is patterned on the outer surface of the conductive member in the base.
- a conductive layer is patterned on the outer surface of the conductive member in the base.
- the above-described voice coil for speaker device is characterized in that a pair of conductive layers are provided so as to surround the conductive member, and functions as a relay line for inputting an audio signal to the conductive member. According to this, it is possible to route the conductive member at an arbitrary place around the conductive member, and it is possible to improve the space efficiency of the wiring of the audio signal input.
- the voice coil for speaker device described above is characterized in that the conductive layer is formed in an annular shape. According to this, the conductive layer can be provided with a short ring function, and current distortion (harmonic distortion) can be effectively suppressed.
- the voice coil for speaker device described above is characterized in that a plurality of the conductive layers are patterned on both sides of the conductive member along the vibration direction of the voice coil. According to this, a braking force can be applied to the vibration of the voice coil, and this can be suppressed against vibration with excessive amplitude. In addition, the acoustic characteristics can be adjusted by applying a braking force to the voice coil.
- the above-described voice coil for speaker device is characterized in that one of the plurality of conductive layers has a closed shape and the other has an open shape.
- the short ring function described above can be provided by the closed shape, and the terminal lead structure of the conductive member can be formed by the open shape.
- One of the conductive layers is a short ring layer, and the width of the short ring layer is substantially the same or smaller than the width of the conductive member, and by adjusting the width, the braking force acting on the voice coil by the short ring function Can be adjusted.
- the voice coil for speaker device described above is characterized in that the conductive member is wound with different diameters from the center side toward the outside and is arranged between two substrates. According to this feature, the magnitude of the audio current passing through the conductive member can be made substantially equal to the input audio current, and the electromagnetic force acting on the conductive member can be made relatively large.
- the above-described voice coil for speaker device is characterized in that conductive members wound in the same diameter are laminated in the thickness direction of the base. According to this, since the conductive member can be densely wound, the driving force can be further increased.
- the voice coil for speaker device described above is characterized in that the conductive member has a polygonal cross section. According to this, the occupation ratio of the conductive member can be increased as compared with the case where the cross section of the conductive member is circular. This makes it possible to increase the driving force generated by the voice coil while achieving a reduction in thickness.
- the vibration direction of the voice coil is the X-axis direction
- the vibration direction of the diaphragm orthogonal to the X-axis is the Z-axis direction
- the direction orthogonal to them is the Y-axis direction.
- FIG. 2 is an explanatory diagram (a cross-sectional view on the right side from the center O) of the voice coil for the speaker device according to the embodiment of the present invention.
- the voice coil 40 includes a conductive member 30 that is planar and annularly wound, and has rigidity in at least a vibration direction (X-axis direction) along the planar direction.
- the conductive member 30 is formed by winding various forms of winding 31 in a flat shape.
- the winding 31 (31a, 31b) itself has a polygonal (rectangular) cross section and is rigid at least in the vibration direction (X-axis direction). is doing.
- FIG. 4A and 4B the winding 31 (31a, 31b) itself has a polygonal (rectangular) cross section and is rigid at least in the vibration direction (X-axis direction). is doing.
- FIG. 4A and 4B the winding 31 (31a, 31b) itself has a polygonal (rectangular) cross section and is rigid at least in the vibration
- the winding 31a having a long cross-sectional shape in the direction perpendicular to the vibration direction (X-axis direction) is wound in one layer, and in the example shown in FIG.
- the winding 31b having a long cross-sectional shape in the vibration direction is formed into a multilayer winding in which the windings 31b are stacked in a direction perpendicular to the vibration direction (X-axis direction).
- the entire conductive member 30 including the winding 31 is solidified with a solidifying agent 32 to give rigidity in the vibration direction (X-axis direction).
- the winding 31 may be a winding 31c having a circular cross section as shown in FIG. 4C, or may be a winding 31d having an elliptical cross section as shown in FIG.
- the multi-layer winding is laminated in two stages in the direction perpendicular to the vibration direction, but it may be a single layer or a multi-layer winding of three or more stages.
- the solidifying agent 32 a resin adhesive or the like can be used.
- the conductive member 30 may be configured by a single linear conductive wire, or may be configured by a plurality of conductive wires.
- FIG. 3 is an explanatory diagram (a cross-sectional view on the right side from the center O) of the voice coil for the speaker device according to the embodiment of the present invention, which is composed of a conductive member 30 that is planar and annularly wound, and is at least in the planar direction.
- a voice coil 40 having rigidity with respect to the vibration direction (X-axis direction) along the axis is supported by a rigid base 41.
- the winding 31 forming the conductive member 30 has a circular cross section (the same figure (a), (c)), an elliptical cross section (the same figure (b), (d), (e)), a polygonal (rectangular) cross section ( Various cross-sectional shapes such as (f) and (g) in FIG.
- the winding 31 is composed of one layer winding (the figure (a), the figure (b), the figure (f)), two layers (the figure (c), the figure (d)), three layers or more. It can be formed in any manner of multilayer winding (FIG. (E), FIG. (G)).
- the base body 41 can be formed of a plastic plate or the like having rigidity and insulating properties.
- substrates used for printed circuit boards for example, paper phenolic substrates (paper impregnated with phenolic resin), paper epoxy substrates (paper impregnated with epoxy resin), glass composite substrates (trimmed) Glass epoxy substrate (impregnated with epoxy resin), glass epoxy substrate (impregnated with epoxy resin on a sheet of fabric, woven fabric or nonwoven fabric made of glass fiber), Teflon substrate (Substrates formed of Teflon (registered trademark)), alumina substrates (substrates formed of aluminum oxide), and composite substrates (substrates formed by sandwiching the above glass epoxy substrate with a paper epoxy substrate) can be used. .
- a mounting opening is formed in the base body 41, and the conductive member 30 is disposed in the opening.
- the conductive member 30 includes windings 31 wound with different diameters from the center side toward the outside.
- the windings 31 of the conductive member 30 wound with the same diameter are formed on the base body 41. Are stacked in the thickness direction. An opening is formed inside the inner peripheral portion of the conductive member 30.
- the cross-sectional shape of the conductive member 30 is, for example, a circle, a gap is formed between each conductive member 30.
- the cross-sectional shape of the conductive member is rectangular or polygonal, the occupation ratio of the conductive member 30 in the voice coil 40 is relatively large compared to the case where the cross-sectional shape is the circular conductive member 30, and the voice
- the electromagnetic force acting on the coil 40 more specifically, the electromagnetic force acting on the conductive member 30 to which a voice signal is input can be made relatively large by configuring a voice coil 40 disposed in a magnetic gap described later. . As a result, a relatively large driving force can be applied to the diaphragm.
- the thickness of the voice coil 40 can be made relatively small, which can contribute to a reduction in the thickness of the speaker device.
- the above-described occupation ratio is considered under the condition that the cross-sectional area of the conductive member 30 is the same.
- a conductive member 30 having a circular cross-sectional shape is used, and a relatively large gap is formed between each conductive member 30, a gap is generated when the conductive member 30 having a cross-sectional shape other than circular is used. Since the gap is relatively small or the gap can be eliminated, the occupation ratio of the conductive member 30 whose cross-sectional shape is other than circular can be increased.
- FIG. 4 is an explanatory view (cross-sectional view) of the voice coil for the speaker device according to the embodiment of the present invention, and is an explanatory view showing a support form of the conductive member 30.
- the conductive member 30 here can adopt the form shown in FIG.
- the example shown in FIG. 3A is the form shown in FIG. 3, in which an opening of a voice coil attachment location 41a is formed in the base body 41, and the conductive member 30 is disposed in the opening.
- an opening 41 b is formed inside the inner peripheral portion of the conductive member 30.
- the annular conductive member 30 is attached to the annular voice coil attachment portion 41 a of the base 41, and the protective films 44 are attached to both surfaces of the base 41 so as to cover the conductive member 30. ing.
- the conductive member 30 is disposed on the surface of the base body 41.
- an opening 41 b is formed in the base body 41 so as to correspond to the central opening of the conductive member 30.
- the conductive member 30 is sandwiched between at least two bases 41.
- FIG. 4D the above-described opening 41b is formed in each of the bases 41.
- FIG. 4E the opening 41b is not formed, and the space between the two bases 41 is not formed.
- An internal filling member 45 is arranged so as to fill the gap.
- the internal filling member 45 can be made more rigid than the base body 41 or can be made of the same material as the base body 41.
- the thickness of the base body 41 is made thinner than the thickness of the internal filling member 45 or the conductive member 30.
- FIGS. 5 to 14 are explanatory views showing more specific embodiments of the voice coil for speaker.
- the voice coil 40 is formed by only the conductive member 30.
- the conductive member 30 is wound in a rectangular shape to form a flat voice coil.
- the voice coil 40 is formed by winding the conductive member 30 in a cylindrical shape.
- the lid member 40X can be fixed to the tip.
- the conductive member 30 is wound into a cylindrical shape to form a voice coil 40, and both ends thereof are sandwiched between support members 30S made of resin or the like. This also allows the lid member 40X to be fixed to the tip in order to connect other members to the tip.
- Each example has rigidity in the vibration direction, but it can be thinned as shown in FIG.
- the conductive member 30 is supported on the base 41.
- the conductive member 30 supported on the base 41 starts winding the conducting wire from the terminal Se and finishes winding at the terminal En.
- An opening 41 b is formed at the center of the wound conductive member 30.
- the voice coil 40 has a width h1 in a direction orthogonal to the vibration direction substantially the same between both end portions of the conductive member 30 in the vibration direction, and a vibration direction converting portion described later from the vicinity of the end portion of the conductive member 30.
- the width is gradually narrowed toward the connected end (width h2).
- the voice coil 40 is relatively large when the speaker is driven by relatively increasing the length of the voice coil in the direction orthogonal to the vibration direction of the voice coil 40 relative to the length of the voice coil 40 in the vibration direction. A driving force or an electromagnetic force can be obtained.
- the voice coil attachment portion 41a where the conductive member 30 is supported by the base body 41 is a stepped groove, and the conductive member 30 is supported on the bottom surface thereof.
- An opening 41 b is formed inside the conductive member 30 in the base body 41.
- the planar shape of the voice coil 40 is formed in a horizontally long shape in a direction orthogonal to the vibration direction (X-axis direction). This shape further enhances the rigidity in the vibration direction, and transmits the vibration of the voice coil 40 to the vibration direction conversion unit 50 described later without being deformed by itself.
- the voice coil 40 has a relatively large length in the direction orthogonal to the vibration direction of the voice coil 40 relative to the length in the vibration direction of the voice coil 40, so that the speaker device can be driven. A relatively large driving force can be obtained.
- a conductive layer 46 is patterned on the outer surface of the conductive member 30 in the base body 41, and a pair of conductive layers 46 (46A, 46B) are provided so as to surround the conductive member 30.
- the conductive layer 46 (46A, 46B) functions as a relay line for inputting an audio signal to the conductive member 30.
- Each of the conductive layers 46 is formed with a voice coil connection terminal 42 to which an end of a voice coil lead wire 43 drawn from one end of the winding of the conductive member 30 is connected.
- a connection terminal 47 is provided.
- an end 40A to which a connecting portion or a vibration direction changing portion to be described later is connected is formed at one end of the base body 41, and engagement protrusions 41c and 41c to which a holding portion to be described later is connected at the other end. Is formed.
- the voice coil 40 is formed between an end portion 40B where engagement protrusions 41c and 41c to which a holding portion, which will be described later, is connected, and an end portion 40A, to which a connecting portion or a vibration direction changing portion, which will be described later, is connected.
- the outer peripheral portion 40C is formed to have a narrow width. Particularly, the width of the outer peripheral portion 40C is narrower from the end portion 40B of the voice coil 40 to the vicinity of the end portion of the conductive member 30 on the end portion 40A side of the voice coil 40. As shown in FIGS.
- the voice coil 40 since the voice coil 40 has a shape that narrows the width of the outer peripheral portion 40 ⁇ / b> C, vibration of the voice coil 40 is effectively described later while preventing the voice coil 40 from being bent. It can be transmitted to the vibration direction changing section and the diaphragm.
- the reason why the conductive layer 46 is provided so as to surround the periphery of the conductive member 30 as in the example shown in FIG. 7 is to suppress the occurrence of current distortion (harmonic distortion) of the current flowing through the conductive member 30 (conductive Although the layer has an open shape), as shown in FIGS. 9 to 13, the short ring layer 48 made of a closed conductive layer is arranged around the conductive member 30 to suppress the current distortion more remarkably. (Short ring has an open shape).
- a braking force can be applied to the voice coil 40 in the vibration direction of the voice coil 40.
- FIG. 7 a braking force can be applied to the voice coil 40 in the vibration direction of the voice coil 40.
- an insulating layer 49 is formed across the end of the conductive layer 46, and a short ring layer 48 is formed on the insulating layer 49.
- the short ring layer 48 is annularly formed on both sides of the conductive member 30 along the vibration direction of the voice coil 40.
- the opening 41 b formed in the base body 41 is provided with a mounting portion (protruding portion) that protrudes toward the inside of the voice coil 40.
- the protruding portion may be formed by protruding the inner peripheral portion of the protective film 44 shown in FIG. 4B toward the inside of the voice coil 40, that is, toward the opening 41b. May be formed by projecting toward the opening 41b, and may be formed of a member other than the conductive member 30 among the members constituting the voice coil 40.
- a part of the voice coil (for example, a leader line) is disposed on the protruding portion, and an adhesive M is applied to bond the conductive member 30 and the base body 41 including the protruding portion.
- the protrusion has rigidity to support the conductive member 30.
- the short ring layer 48 is formed with a width smaller than the width of the magnetic gap 20 ⁇ / b> G or the width of the conductive member 30 in the direction orthogonal to the vibration direction of the voice coil 40.
- the short ring layer 48 is formed with a width substantially equal to the width of the magnetic gap 20 ⁇ / b> G or the width of the conductive member 30 in the direction orthogonal to the vibration direction of the voice coil 40.
- the magnitude of the braking force acting on the voice coil 40 can be adjusted in the vibration direction of the voice coil 40. Furthermore, it is possible to suppress the occurrence of excessive vibration in the voice coil 40.
- the width of the short ring layer 48 is smaller than the width of the magnetic gap 20G or the width of the conductive member 30, the braking force is relatively small, and the width of the short ring layer 48 is reduced to the width of the magnetic gap 20G.
- the width is approximately the same as the width of the conductive member 30, the braking force is relatively large.
- the short ring layer 48 is formed in a ring pattern on the base 41 so as to surround the outer periphery of the conductive layer 46.
- the short ring layer 48 is formed in a ring pattern on the base body 41 inside the conductive layer 46.
- the short ring layer 48 is disposed on the conductive member 30 side of the base body 41, but is not limited thereto, and may be disposed on the side opposite to the conductive member 30 side.
- FIG. 13 shows an example in which a short ring layer 48 is formed on the side opposite to the conductive member 30.
- FIG. 4A is a plan view showing a surface of the voice coil 40 on which the conductive member 30 is supported
- FIG. 4C is a rear view of the voice coil 40
- FIG. FIG. 48 By forming the short ring layer 48 on the back surface of the base body 41, the short ring layer 48 can be formed without any space limitation.
- FIG. 14 shows an example in which the conductive member 30 is composed of a plurality of conductive wires.
- the conductive member is formed of the first conductive member 30 1 and the second conductive member 30 2 , for example, the second conductive member 30 2 is disposed on the base 41, and the first conductive member 30 1 is the first conductive member 30 1 . if it is arranged so as to surround the second conductive member 30 2, a plurality of conductive layers corresponding to the first conductive member 30 1 and the second conductive member 30 2 (short ring layer 48 1, 48 2) May be arranged.
- FIGS. 15 to 17 are explanatory diagrams for explaining a magnetic circuit for vibrating the voice coil 40 having the rigidity described above.
- the magnetic circuit 20 for vibrating the voice coil 40 not only forms the magnetic gap 20G along the vibration direction of the voice coil 40 but also flows through the conductive member 30 wound in a plane on the voice coil 40.
- the magnetic gap 20G forms a pair of magnetic fields in opposite directions. 15 to 17, a pair of magnetic gaps 20G are formed along the vibration direction of the voice coil 40.
- the present invention is not limited to this, and the magnetic circuit 20 may include only one magnetic gap 20G. Absent. 15 to 17, the two magnetic pole portions constituting the two magnetic gaps 20G arranged along the vibration direction of the voice coil 40 are formed so that the opposing surfaces are substantially parallel to each other. The width of 20G is made the same.
- the magnetic circuit 20 is formed by the magnet 21 and the yoke portion 22, and a pair of magnetic gaps 20G (20G1, 20G2) having magnetic field directions opposite to each other in the Z-axis direction are arranged at predetermined intervals in the X-axis direction. Forming. Then, by winding the conductive member 30 so that currents flowing in the magnetic gap 20G (20G1, 20G2) are opposite to each other in the Y-axis direction, Lorentz force along the X-axis direction acts on the conductive member 30. I have to.
- the conductive member 30 of the voice coil 40 has a pair of straight portions 30A and 30C, and a conductive member 30 so that a reverse current flows through the straight portions 30A and 30C through the pair of magnetic gaps 20G1 and 20G2.
- a conductive member 30 so that a reverse current flows through the straight portions 30A and 30C through the pair of magnetic gaps 20G1 and 20G2.
- the magnetic circuit 20 includes a plurality of magnets 21 (21A to 21D).
- the magnets 21 are provided on both sides along the direction of the magnetic field of the magnetic gap 20G.
- the yoke portion 22 includes a lower yoke portion 22A, an upper yoke portion 22B, and a column portion 22C.
- the yoke portions 22A and 22B are disposed substantially parallel to each other with a specified interval, and the column portion 22C is formed at the center portion so as to extend in a direction substantially orthogonal to the yoke portions 22A and 22B. .
- Magnets 21A to 21D are arranged in the yoke portions 22A and 22B, and one magnetic gap 20G2 is formed by the magnet 21A and the magnet 21C, and another magnetic gap 20G1 is formed by the magnet 21B and the magnet 21D.
- the pair of magnetic gaps 20G1 and 20G2 are formed side by side in a plane, and magnetic fields in opposite directions are formed.
- the conductive member 30 has 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 conductive member 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 conductive member 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. Since the conductive member 30 has a relatively large number of turns, a portion in the magnetic gap 20G can be made relatively large, and a relatively large driving force can be obtained when the speaker is driven.
- the magnetic circuit 20 includes a plurality of magnets 21A to 21D such that the direction of the magnetic field related to the straight portion 30A of the conductive member 30 is opposite to the direction of the magnetic field related to the straight portion 30C.
- the magnet 21A and the magnet 21C are magnetized in the same direction
- the magnet 21B and the magnet 21D are magnetized in the opposite direction. Magnetization of the magnet 21 can be performed after the magnet 21 and the yoke portion 22 are assembled, but in the example shown in FIGS. 15 and 16, it is necessary to perform the magnetizing process at that time twice.
- the magnetic gap 20G2 is formed by magnets 21A and 21C magnetized in the same direction, and the magnetic gap 20G1 is 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 part 22 can be completed once, and the process can be simplified.
- the magnetic circuit 20 has a magnetic gap 20G1 and 20G2 both formed of a magnet and a yoke protrusion, or one of the magnetic gaps 20G1 and 20G2 is formed of a magnet and a yoke, and the other May be composed of two magnets or two yoke portions.
- FIGS. 18 to 20 are explanatory views showing the overall configuration of the speaker device including the voice coil according to the embodiment of the present invention.
- the speaker devices 1, 1 ⁇ / b> A, 1 ⁇ / b> B, 1 ⁇ / b> C, and 1 ⁇ / b> D include a drive unit 14 that includes a voice coil 40 and a magnetic circuit 20 that vibrates the voice coil 40, and a vibration plate that transmits vibration from the drive unit 14 by an audio signal. 10 and a stationary part 100 that supports the drive part 14 and the diaphragm 10.
- the stationary part 100 is a general term for parts that support vibrations such as the vibration plate 10 and the driving part 14.
- the stationary part 100 includes a frame 12, a yoke part (which will be described later) that also functions as the frame 12, and a mounting unit. It hits.
- the stationary part 100 is not intended to be completely stationary per se, but is entirely oscillated under the influence of the vibration of the driving part 14 or other force. Also good.
- the outer peripheral portion of the diaphragm 10 is supported by a frame 12 that is a stationary portion 100 via an edge 11.
- the frame 12 is provided with a vent 12B as necessary.
- the drive unit 14 includes a vibration direction conversion unit 50 that converts the vibration of the voice coil 40 into an angle and transmits the vibration to the diaphragm 10.
- the vibration direction conversion unit 50 has a vibration direction of the vibration plate 10 and a vibration direction of the voice coil 40, respectively.
- a rigid link portion 51 is provided obliquely.
- 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 SD 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.
- the material for forming the diaphragm 10 for example, a resin material, a metal material, a paper material, a fiber material, a ceramic material, a composite material, or the like can be 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.
- the diaphragm 10 is formed in a flat plate shape, and is supported along a planar bottom portion 12 ⁇ / b> A of the frame 12.
- a flat diaphragm 10 is particularly preferable.
- the diaphragm 10 can be formed in a specified shape such as a rectangular shape, an elliptical shape, a circular shape, or a polygonal shape as viewed from the acoustic radiation direction (planar shape).
- the diaphragm 10 may have a honeycomb structure.
- 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, a ring shape, or a lattice shape with respect to the surface of the diaphragm 10.
- a plurality of linear protrusion portions may be formed on the surface of the diaphragm.
- 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 edge 11 may be formed in a convex shape or a concave shape in the acoustic radiation direction.
- the edge 11 can employ, for example, leather, cloth, rubber, resin, a material obtained by applying a sealing process thereto, a member obtained by molding rubber, resin, or the like into a predetermined shape.
- the drive unit 14 includes the magnetic circuit 20, the voice coil 40, and the vibration direction conversion unit 50 described above.
- the audio signal SS is input from the audio signal input terminal 18 to the voice coil 40 via the voice coil lead wire 43, Lorentz force along the X-axis direction acts on the voice coil 40 in the magnetic gap 20G described above.
- the voice coil 40 vibrates along the X-axis direction.
- 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 12A.
- the frame 12 is also a stationary part 100 that is disposed in a stationary state with respect to the voice coil 40. Note that the stationary unit 100 is not intended to be completely stationary. For example, the stationary unit 100 may be stationary so that the diaphragm 10 can be supported, and vibration generated when the speaker devices 1 to 1D are driven. May propagate and vibration may occur in the entire stationary portion 100.
- the stationary part 100 here corresponds to a part of the magnetic circuit 20 or a place where the speaker devices 1 to 1D are attached.
- the stationary part 100 only needs to be mechanically integrated with the magnetic circuit 20, and the frame 12 can be said to be supported by the magnetic circuit 20. Therefore, for example, a constituent member (for example, a yoke portion 22 described later) constituting the magnetic circuit 20 or a member supported by the magnetic circuit 20 can be the stationary portion 100.
- the vibration direction converter 50 changes the direction of the vibration of the voice coil 40 and transmits it to the diaphragm 10.
- the vibration direction conversion unit 50 includes a rigid link portion 51, and changes the angle of the rigid link portion 51 that is obliquely arranged with respect to the vibration direction of the diaphragm 10 and the vibration direction of the voice coil 40. The vibration of the voice coil 40 is changed in direction and transmitted to the diaphragm 10.
- the vibration direction conversion unit 50 is formed by one link portion 51, and the end 50 ⁇ / b> A on the voice coil 40 side of the vibration direction conversion unit 50 is connected to the joint portion 52 ( 52A), an end portion 50B on the vibration plate 10 side of the vibration direction changing portion 50 is formed by a joint portion 52 (52B) that connects the link portion 51 to the vibration plate 10.
- FIG. 4A shows the initial state
- FIGS. 2B and 2C show the state when the speaker is driven.
- the joint portion 52 rotatably connects the link portion 51 and the connection target, and the voice coil 40 side is accompanied by the vibration of the voice coil 40.
- the joint 52A moves in the X-axis direction along with the movement of the voice coil 40, and the joint 52B on the diaphragm 10 side moves along the vibration direction (for example, the Z-axis direction) of the diaphragm 10.
- the vibration of the voice coil 40 in the X-axis direction is changed, and the diaphragm 10 is vibrated in a direction different from the X-axis direction (for example, the Z-axis direction).
- a speaker device 1A according to the embodiment shown in FIG. 19 includes the drive units 14 shown in FIG. 18 arranged symmetrically facing each other, and includes drive units 14 (R) and 14 (L).
- Link portions 51 (R), 51 (L), voice coils 40 (R), 40 (L), and magnetic circuits 20 (R), 20 (L) are provided in the drive units 14 (R), 14 (L).
- FIG. 4A shows the initial state
- FIGS. 2B and 2C show the state when the speaker is driven.
- the two drive units 14 by synchronizing the vibration directions of the voice coils 40 (R) and 40 (L) and making them reverse, the two drive units 14 ( The diaphragm 10 can be vibrated by combining the driving forces R) and 14 (L). Further, since the joint portion 52B on the diaphragm 10 side can be provided at a plurality of locations, the support points of the diaphragm 10 are increased, and the vibration phase of the diaphragm 10 can be matched.
- the vibration direction converter 50 is formed by a link mechanism 50L including a rigid first link portion 51A and a second link portion 51B.
- the connection between the end 50A on the voice coil 40 side of the vibration direction converter 50 and the voice coil 40 is formed by the joint 52A, and the end 50B on the diaphragm 10 side of the vibration direction converter 50 is the first link portion 51A.
- the first link portion 51A and the second link portion 51B are inclined in different directions with respect to the vibration direction of the voice coil 40, and one end of the second link portion 51B is a joint portion in the middle of the first link portion 51A.
- the other end of the second link portion 51B is connected to the stationary portion 100 by a joint portion 52D.
- the stationary part 100 is provided on the side opposite to the diaphragm 10 side with respect to the vibration direction converting part 50.
- the stationary part 100 is a support base 13 formed on the bottom 12 ⁇ / b> A of the frame 12.
- the frame 12 has a flat bottom 12A, the diaphragm 10 is supported in a plane along the bottom 12A of the frame 12, and the magnetic gap 20G of the magnetic circuit 20 is formed along the bottom 12A of the frame 12.
- the vibration direction converter 50 forms the stationary part 100 by the bottom part 12A of the frame 12, and vibrates the diaphragm 10 in a direction intersecting the bottom part 12A.
- the joint portions 52A, 52B, 52C, and 52D connect the first link portion 51A, the second link portion 51B and the connection target in a freely rotatable manner, and the joint portion 52A on the voice coil 40 side is connected to the voice coil 40.
- the joint portion 52D connected to the support base 13 that becomes the stationary portion 100 moves in the X-axis direction along the movement of the stationary portion 100 and is fixed, and the joint portion is caused by the reaction force received from the support base 13 of the stationary portion 100.
- the movement of 52A converts the angles of the first link portion 51A and the second link portion 51B, and moves the joint portion 52B on the diaphragm 10 side in the vibration direction (for example, the Z-axis direction) of the diaphragm 10.
- the speaker device 1B is configured to vibrate the diaphragm 10 by one drive unit 14, but according to the embodiment shown in FIGS. 20B and 20C.
- the driving units 14 are arranged symmetrically facing each other, and auxiliary links 51G (R) and (L) that form parallel links with the first link portions 51A (R) and (L) are further provided.
- the voice coils 40 (R) and (L) are connected to the outer ends.
- the auxiliary links 51G (R), (L) are connected to the outer ends of the voice coils 40 (R), (L) by joints 52G (R), (L), and the diaphragm 10 and the joint 52H. They are connected by (R) and (L).
- Each drive unit 14 (R), 14 (L) is provided with a link mechanism 50L, voice coils 40 (R), 40 (L), and magnetic circuits 20 (R), 20 (L).
- the joint portions 52B and 52D are common to the first link portions 51A (R) and (L) and the second link portions 51B (R) and (L).
- the joint portions 52B and 52D are separated in the first link portions 51A (R) and (L) and the second link portions 51B (R) and (L). The point is.
- the auxiliary rings 51G (R) and (L) can be omitted as necessary.
- the vibration directions of the voice coils 40 (R) and 40 (L) are synchronized and reversed so that the driving forces of the two drive units 14 (R) and 14 (L) are combined to vibrate.
- the plate 10 can be vibrated.
- the joint portions 52B and 51G on the diaphragm 10 side can be provided at a plurality of locations, the support points of the diaphragm 10 are increased, and the vibration phase of the diaphragm 10 is matched, in other words, the diaphragm 10 is substantially the same. It becomes possible to vibrate in phase.
- the voice coils 40 (R) and 40 (L) vibrate in the horizontal direction, for example, generation of vibration in the horizontal direction on the diaphragm can be suppressed.
- the magnetic gap 20G formed along a direction different from the allowable vibration direction of the diaphragm 10 is applied.
- the voice coil 40 vibrates along the direction, and the direction of the vibration is changed by the vibration direction conversion unit 50 and transmitted to the vibration plate 10.
- the vibration plate 10 is vibrated to respond to the sound signal SS in the acoustic radiation direction SD. Sound is emitted.
- the driving force of the magnetic circuit 20 or the vibration stroke of the voice coil 40 can be increased.
- the size of the speaker devices 1 to 1D in the thickness direction (Z-axis direction) is not directly affected. Therefore, it is possible to reduce the thickness of the speaker devices 1 to 1D while increasing the volume.
- the vibration direction conversion unit 50 converts the vibration direction of the voice coil 40 by the mechanical link mechanism and transmits it to the diaphragm 10, the vibration transmission efficiency is high.
- the angle change between the first link part 51A and the second link part 51B is caused by the vibration of the voice coil 40 and the support base 13 that becomes the stationary part 100. Therefore, the vibration from the voice coil 40 can be more reliably transmitted to the diaphragm 10. As a result, good reproduction efficiency of the speaker devices 1B to 1D can be obtained.
- FIGS. 21 and 22 are explanatory views showing a mechanism for holding the voice coil according to the embodiment of the present invention in a frame serving as a stationary part.
- the voice coil 40 according to the embodiment of the present invention is held by the frame 12 serving as the stationary portion 100 by the holding portion 15 directly or via another member.
- the holding unit 15 holds the voice coil 40 at a predetermined position in the magnetic gap 20G so that the voice coil 40 does not contact the magnetic circuit 20, and so that the voice coil 40 vibrates linearly (X-axis direction).
- the frame 12 is held movably directly or via another member.
- the holding portion 15 restricts the voice coil 40 from moving in a direction different from the vibration direction of the voice coil 40, for example, in the Z-axis direction or the Y-axis direction.
- the holding portion 15 has a shape in which a cross-sectional shape is formed in a curved shape and can be bent.
- the holding portion 15 has a predetermined thickness in the Z-axis direction (larger than the thickness in the X-axis direction), and is formed in a shape having rigidity in the Z-axis direction.
- the holding portion 15 may be formed in various shapes such as a convex shape, a concave shape, a corrugated shape, and a uniform thickness or a non-uniform thickness.
- the holding part 15 has one end joined to the voice coil 40 and the other end joined to the frame 12.
- the holding unit 15 is not limited to this configuration, and may be configured such that, for example, one end is joined to the voice coil 40 and the other end is joined to the magnetic circuit 20.
- FIG. 22 is an explanatory view showing an example in which the voice coil is attached to the frame via the attachment unit (FIG. 22A is a perspective view seen from the middle direction between the X-axis direction and the Y-axis direction, and FIG. It is the perspective view seen from the reverse direction).
- the voice coil 40 is connected to the vibration direction converter 50 via the connecting portion 60, and the connecting portion 60 is held on the frame via the mounting unit 16.
- the voice coil 40 has a connecting portion 60 attached to one end in the vibration direction, and the connecting portion 60 is attached so as to extend along the width of the voice coil 40.
- the voice coil attachment location 41a is formed on the flat base 41, and the conductive member 30 is attached to the voice coil attachment location 41a.
- An opening 41b is formed inside the conductive member 30 in the voice coil 40 to reduce the weight of the voice coil 40.
- the holding portion 15 has a structure for restricting movement of the voice coil 40 in other directions while allowing movement of the voice coil 40 along the X-axis direction, specifically, along the Z-axis direction.
- a convex curve along the X-axis direction is formed by a plate material having a certain thickness, and other deformations are restricted while allowing deformation in the bending and extending direction of the curve.
- one end of the holding unit 15 is connected to the voice coil 40 or the coupling unit 60 and the other end is connected to the mounting unit 16, or the middle part thereof is the voice coil 40 or the coupling unit 60. And both ends thereof are connected to the mounting unit 16.
- the holding unit 15 includes a first holding unit 15A and a second holding unit 15B, and the first holding unit 15A and the second holding unit 15B frame the voice coil 40 via the mounting unit 16. 12 is held.
- maintain the connection part 60 in the attachment unit 16, and the inner edge part of the 1st holding part 15A provided in each right and left is connected to the both outer edge parts of the connection part 60.
- the outer ends of the first holding portions 15A are connected to the mounting unit 16, respectively. More specifically, engagement protrusions 60a and 60a are formed at both outer end portions of the connecting portion 60, and the inner end portion of the first holding portion 15A is engaged with the engagement protrusions 60a and 60a. Engaging holes 15a, 15a are formed.
- the attachment unit 16 is formed with first connection portions 16a and 16a on both the left and right sides of the connecting portion 60, and the outer end of the first holding portion 15A has first connection portions 16a and 16a.
- An engagement hole 15a that engages with the engagement protrusions 16a1 and 16a1 is formed.
- the second holding portion 15B has a central portion connected to the second connecting portion 16b of the mounting unit 16 and both ends thereof connected to the left and right ends of the voice coil 40.
- An engagement protrusion 16b1 is formed on the second connection portion 16b, and the engagement hole 15b of the second holding portion 15B is engaged with the engagement protrusion 16b1.
- Engagement protrusions 41c and 41c are formed at the left and right ends of the voice coil 40, and engagement holes 15b formed at both ends of the second holding portion 15B are engaged with the engagement protrusions 41c and 41c.
- the second holding portion 15 ⁇ / b> B is arranged within the width of the voice coil 40 so that the holding mechanism of the voice coil 40 is not bulky in the width direction of the voice coil 40.
- the second connection portion 16b is arranged on both the left and right sides in the same manner as the first connection portion 16a, and the left and right ends of the voice coil 40 are respectively left and right via the second holding portion 15B. You may make it connect to the 2nd connection part 16b.
- the attachment unit 16 includes a first connection portion 16a to which the end portion of the first holding portion 15A is connected on both the left and right sides of the connecting portion 60, and a second connection portion to which the second holding portion 15B is connected. 16b is provided behind the voice coil 40, and has an integrated support portion 16c that integrally supports the first connection portion 16a and the second connection portion 16b.
- the attachment unit 16 includes an attachment locking portion 16d or an attachment locking hole 16e that is attached to the frame 12, and includes a voice coil 40, a connecting portion 60, and a holding portion 15 (first holding portion 15A, first holding portion 15A).
- the two holding portions 15B) and the attachment unit 16 are unitized so that they can be incorporated into the frame 12 in one step of attachment work.
- the first connection portion 16a of the attachment unit 16 is also used as an audio signal input terminal, and an audio signal is supplied to the conductive member 30 via the first holding portion 15A. can do.
- the signal line is placed along the first holding portion 15A
- the first holding portion 15A is a flexible wiring board, or the first holding portion 15A is formed of a conductive material and is itself Can be either a signal line.
- the voice coil lead wire 43 from the conductive member 30 is formed on the insulating base 41, the tip of the voice coil lead wire 43 is electrically connected to the voice coil connection terminal 42, and the voice coil connection terminal 42 is connected.
- the first holding portion 15A is electrically connected to the end on the voice coil side.
- the frame-side end portion of the first holding portion 15A is electrically connected to the first connection portion 16a that also serves as an audio signal input terminal.
- the wiring space of the input signal line can be saved, and the space efficiency in the apparatus can be increased. Further, the signal line does not fluctuate even when the voice coil 40 vibrates, and there is no problem that the signal line comes into contact with each part in the apparatus and generates abnormal noise.
- the vibration direction conversion unit 50 is formed by one link part 51 and joint parts 52 ⁇ / b> A, 52 ⁇ / b> B.
- the vibration in the axial direction is converted into vibration other than the X-axis direction (for example, the Z-axis direction) of the diaphragm 10.
- the vibration direction converter 50 includes a link mechanism 50L formed by the first link portion 51A, the second link portion 51B, and the joint portions 52A, 52B, 52C, and 52D. Has been.
- the joint portion 52D between the second link portion 51B and the support base 13 serving as the stationary portion 100 is a joint portion where the position is not displaced, and the other joint portions 52A, 52B, and 52C are joint portions whose positions are displaced. It has become.
- the entire link mechanism 50L is structured to receive a reaction force from the stationary portion 100 at the joint portion 52D.
- the joint portion 52A moves in the X-axis direction due to the vibration of the voice coil 40
- the joint portion 52B moves along the Z-axis direction. Tell the board 10.
- the vibration direction converter 50 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.
- the first link portion 51A and the second link portion 51B are formed by plate-like members, and the joint portions 52A, 52B, 52C, and 52D of the link mechanism 50L are linear refraction portions.
- 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.
- 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.
- the vibration direction conversion unit 50 may form a vent hole, for example.
- 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.
- 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.
- 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.
- the vibration direction conversion unit 50 may be made of an integral part connected by a refracting unit.
- the vibration direction converter 50 that forms a complicated link mechanism can be immediately joined to the voice coil 40 or the diaphragm 10, and the assembly of the apparatus is improved.
- the vibration direction conversion part 50 can also be formed integrally with the voice coil 40 or the diaphragm 10, for example.
- the joint portions 52A, 52B, 52C, and 52D included in the vibration direction converting unit 50 may be configured by mechanically structured 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.
- the voice coil 40 and the vibration direction conversion unit 50 are integrally formed of a specified material such as a resin material, and are processed so as to be foldable at a predetermined position, so that the joint portions 52A, 52B, 52C, and 52D are formed. It may be formed.
- FIG. 23 is an explanatory diagram for explaining the operation of the vibration direction converter 50 in the embodiment of the present invention shown in FIG. Specifically, FIG. 23B shows the state of the vibration direction converter 50 with the diaphragm 10 positioned at the reference position, and FIG. 23A shows the state where the diaphragm 10 is displaced toward the acoustic radiation side with respect to the reference position. FIG. 23C shows the state of the vibration direction conversion unit 50 in a state where the diaphragm 10 is displaced in the opposite direction with respect to the acoustic radiation side with respect to the reference position. Show.
- the joint portion 52D is the only joint portion whose position does not change, and is supported by the stationary portion 100 such as the frame 12 or the support base 13, and applies a reaction force from the stationary portion 100 to the link mechanism 50L. ing. Accordingly, when the voice coil 40 moves from the reference position X0 by X1 in the X-axis direction, as shown in FIG. 23A, the first link portion 51A and the second link portion that are inclined in different directions are arranged. The angle of 51B rises substantially the same angle, and the joint part 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 part 100 at the joint part 52D.
- the angles of the first link portion 51A and the second link portion 51B are substantially the same angle.
- the joint part 52B reliably pushes down the diaphragm 10 from the reference position Z0 in the direction opposite to the Z axis by Z2.
- the length a of the link part from the joint part 52A to the joint part 52C, the length b of the link part from the joint part 52C to the joint part 52B, and the length c of the link part from the joint part 52C to the joint part 52D are substantially equal, and the joint portion 52A and the joint portion 52D are preferably disposed substantially parallel to the moving direction of the voice coil 40.
- the angle formed by the straight line passing through the joint part 52A and the joint part 52D and the straight line passing through the joint part 52B and the joint part 52D is always a right angle.
- the joint portion 52B between the first link portion 51A and the diaphragm 10 always moves along the Z-axis perpendicular to the X-axis.
- the vibration direction of 40 can be converted to a direction perpendicular to the vibration direction and transmitted to the diaphragm 10.
- FIG. 24A and 24B are explanatory views showing an example of the vibration direction converter 50 according to the embodiment of the present invention (FIG. 24A is a side view, FIG. 20B is a perspective view, and FIG. 24C is an exploded perspective view).
- This vibration direction conversion part 50 is a case where a pair of drive parts are provided and the vibration direction conversion parts 50 are arranged opposite to each other substantially symmetrically, and the vibration direction conversion part 50 is formed as an integral part.
- one end is a joint part 52A (R), 52A (L) with the connecting part 60, and the other end is a joint part 52B (R), 52B (L) with the diaphragm 10.
- connection part 60 has a pair of 3rd link part 51C (R) and 51C (L) integrally extended from the connection part 60, and 4th link part 51D fixed along the diaphragm 10.
- 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.
- joint portions 52B (R) and 52B (L) of the first link portion 51A and the diaphragm 10 are formed at both ends of the fourth link portion 51D.
- the joint portions 52D (R), 52D (L) of the second link portions 51B (R), 51B (L) and a stationary sixth link portion 51F, which will be described later, are substantially equal in length to the fourth link portion 51D.
- the sixth link portion 51F is formed at both ends.
- 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.
- connection portions 53 (R) and 53 (L) with the connection portion 60 are formed at the base end portion of the third link portion 51C.
- the connecting portion 53 is connected to the connecting portion 60 described above.
- the link mechanism 50L of such a vibration direction conversion unit 50 has a function of combining the link mechanism and the parallel link mechanism of the embodiment shown in FIG. 20 and 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 sixth link portion 51F supported by the frame 12 functions as the stationary portion 100.
- 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 connecting portion 60 due to the vibration of the voice coil 40
- the third link portions 51C (R), (L) and the fourth link portion 51D forming the parallel link maintain a parallel state
- the fourth link portion 51D rises to form a parallel link.
- the angle is changed so that the first link portions 51A (R), (L) and the fifth link portions 51E (R), (L) are raised.
- the first link portion 51A (R) receives the reaction force from the stationary portion 100.
- (L) and the fifth link portions 51E (R), (L) are reliably changed in angle, and the displacement of the joint portions 52A (R), (L) from the position X0 to the position X1 is controlled by the diaphragm. 10 is surely converted into a displacement from the position Z0 to the position Z1.
- the angle of the link portions 51E (R) and (L) is reliably changed, and the displacement of the joint portions 52A (R) and (L) from the position X0 to the position X2 is changed from the position Z0 to the position Z2 of the diaphragm 10. Hence convert to displacement.
- the joints 52B (R), (L), 52F (R), (L) and the vibrations in the X-axis direction of one voice coil 40 with substantially the same phase and substantially the same amplitude This is converted into vibration in the Z-axis direction in the fourth link portion 51D.
- the diaphragm 10 is supported in a wide range and is provided with vibrations having substantially the same phase and amplitude, so that the vibration of the voice coil 40 is substantially reduced with respect to the planar diaphragm 10 having a large area. It can be transmitted in the same phase.
- the link mechanism of the vibration direction conversion unit 50 can form each link part with a plate-like member, and each joint part may be formed by joining the link parts so as to be rotatable.
- 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.
- the third link portions 51C (R), (L), the fourth link portion 51D, and the fifth link portions 51E (R), (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.
- the link portion 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.
- 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.
- 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.
- the vibration direction conversion portion is formed by bonding two plate-like members 501 and 502, and the first link portion 51A (R ), (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.
- 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 ⁇ / b> 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.
- an inclined surface is formed at the end of each link portion.
- 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.
- the link mechanism of the vibration direction changing unit can be formed only by mounting one integral part to the two opposing voice coils 40, a speaker device including a pair of drive units is provided. Even in the case of forming, assembly work can be easily performed. Further, by providing the sixth link portion 51F, the joint portion 52D (R), in particular, against the opposing vibration of the voice coil 40 (the plurality of voice coils 40 vibrate in opposite directions). Even if (L) is not supported by the frame 12, the positions of the joints 52D (R) and (L) are always kept constant, and this also allows the vibration direction converter to be incorporated into the speaker device. Can be simplified.
- the fourth link portion 51D fixed to the diaphragm 10 can be stably translated along the Z-axis direction against the opposing vibration of the voice coil 40. As a result, it is possible to apply stable vibration to the planar diaphragm 10.
- the embodiment shown in FIG. 26 is an improved example of the embodiment shown in FIG.
- the convex portion 510 is provided on the link portion where bending is likely to occur due to the opposing vibration of the voice coil 40 to increase the rigidity.
- 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.
- an opening 520 is provided in a link portion that does not particularly require strength, thereby reducing the weight of the vibration direction changing portion.
- an opening 520 is provided in the 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.
- FIG. 27 is an explanatory view showing a modified example of the voice coil 40, and an annular conductive member 30 is formed by winding a conducting wire such as a winding in a planar shape along the outer periphery of the winding core.
- a conducting wire is wound around a convex winding core 41d formed in the center of the base body 41.
- a protective film 32 made of, for example, a resin film may be attached to the surface of the conductive member 30 made of winding.
- the conductive member 30 formed of a conductive wire partly rises due to a stress (stress) generated when the conductive material is wound due to a shape change with time. This lifting can be suppressed by the protective film 32.
- an annular conductive member 30 is formed by winding a conductive wire in a planar shape on the outer periphery of a winding core 41e formed integrally or separately with the base body 41.
- the vibration direction conversion unit 50 is supported by the end of the voice coil 40 made of
- the connecting unit 61 is attached so as to be sandwiched in the thickness direction at the end portion of the conductive member 30, thereby suppressing a part of the conducting wire at the end portion of the voice coil 40 from floating along with the shape change with time. be able to.
- a conductive wire 30 is formed around the outer periphery of the winding core 41e to form an annular conductive member 30, and a protective film 32 made of, for example, a resin film is formed on the back side of the conductive member 30.
- a protective film 32 may be attached to the surface of the conductive member 30 as in the example shown in FIG.
- the vibration direction changing unit 50 is supported via the connecting unit 61 at the end of the voice coil 40 in which the conductive member 30 and the protective film 32 are integrally laminated. It is possible to further prevent the part of the conducting wire at the end of 40 from floating.
- the voice coil 40 was comprised with the electrically-conductive member 30 which consists of conducting wires, it may replace with a conducting wire and may form with printed circuit boards, such as metal foil and a electrically conductive film, for example.
- FIG. 28 and FIG. 29 are explanatory diagrams showing modifications of the magnetic circuit 20.
- the two magnetic pole portions constituting each magnetic gap 20G are formed so that the opposing surfaces are inclined, and between the one end portions of the magnetic pole portions.
- the width of the magnetic gap 20G is larger than the width of the magnetic gap 20G between the other ends, and the voice coil is drawn from one end of the winding of the conductive member 30 in the vicinity of the one large end.
- a lead-out portion 43A of the lead-out line 43 is arranged.
- a magnetic material having a triangular cross section is fixed to a surface of the plurality of magnets 21A to 21D facing the conductive member 30, or a trapezoidal magnet is used.
- the two magnetic gaps 20G are inclined in the same direction, and the voice coil lead wire 43 is drawn out from the wide side of the magnetic gap 20G.
- the yoke portions 22A and 22B are curved, and a magnetic body having a triangular cross section is fixed to the surface facing the conductive member 30, or a trapezoidal cross section is formed.
- the two magnetic gaps 20G are inclined in the same direction, and the voice coil lead wire 43 is drawn out from the wide side of the magnetic gap 20G. Accordingly, by pulling out the voice coil lead wire 43 in the region where the width of the magnetic gap 20G is large, it is possible to prevent the magnetic body and the voice coil lead wire 43 from contacting each other. Also, the generation of abnormal noise can be suppressed.
- FIG. 30 is a perspective view of the speaker device 1S according to the embodiment of the present invention.
- 31 is a cross-sectional perspective view of the speaker device 1S shown in FIG. 32 is a top view of the main part of the speaker device 1S shown in FIG. 33 is a top view of the main part of the speaker device 1S shown in FIG.
- the parts described in the above-described embodiment are denoted by the same reference numerals, and a part of the description is omitted.
- the diaphragm is omitted.
- a part of the magnetic circuit on the right side in the drawing is omitted.
- the speaker device 1S includes the diaphragm 10, the frame 12, the edge 11, the magnetic circuit 20, the voice coil 40, the vibration direction conversion unit 50, and the holding unit 15 as described in the above-described embodiment.
- the frame 12 has a rectangular outer periphery, and a planar diaphragm 10 having a rectangular outer periphery corresponding to the shape is disposed in the rectangular opening of the frame 12.
- An edge 11 is provided on the outer peripheral edge of the diaphragm 10, and the entire periphery of the diaphragm 10 is supported by the outer peripheral edge of the frame 12 via the edge 11.
- the frame 12 has a planar bottom portion 12A, and the diaphragm 10 is supported in a plane along the bottom portion 12A.
- the pair of voice coils 40 driven by the pair of magnetic circuits 20 (R) and 20 (L) are provided with vibration direction conversion units 50 at both ends along the vibration direction.
- a pair of first link portions 51A (R), (L) and second link portions 51B (R), (L) are provided at the center, and auxiliary links 51G are provided outside the voice coils 40. (R) and (L) are provided.
- the first link portions 51A (R) and (L) are joined to the center portion (center of gravity position) of the diaphragm 2 via a joint portion 52B so as to be refractable.
- the auxiliary links 51G (R) and (L) are refractably joined via joint portions 52H (R) and (L) at positions on the outer peripheral side of the center portion (center of gravity position) of the diaphragm 10. Has been.
- a joining end portion 54 is formed in the vicinity of the upper end portions of the first link portions 51A (R), (L) and the auxiliary links 51G (R), (L), and the joining end portion 54 is the diaphragm 10. It is fitted in the groove portion 10A formed. Further, for example, the joint end portion 54 is fixed in a state of protruding from the front side surface of the diaphragm 10.
- the vibration plate 10 is supported by the vibration direction changing portion 50 in three lines, and the linear joining end portion 54 becomes a reinforcing material and is embedded inside. It has strength and can suppress the occurrence of deflection of the diaphragm. As a result, the entire diaphragm 10 can be vibrated at substantially the same phase.
- first link portions 51A (R) and (L) and the auxiliary links 51G (R) and (L) form two opposing parallel links, the opposing vibration of the voice coil 40 (a plurality of voices) When the coils 40 vibrate in opposite directions, the three joints vibrate with substantially the same phase and substantially the same amplitude. Also by this, the diaphragm 10 as a whole vibrates in substantially the same phase, and generation of divided vibrations can be suppressed.
- the first link portions 51A (R), (L) and the auxiliary links 51G (R), (L) are provided with vent holes 51P.
- each link portion of the plate-like member can be vibrated without receiving a large air resistance.
- the vent hole 51P it is possible to reduce the weight of each link portion, and it is possible to widen the reproduction characteristics.
- the means for regulating the moving direction of the voice coil 40 includes a holding part 15 and a support part 17.
- the support part 17 is an L-shaped member formed in the longitudinal direction along both ends of the voice coil 40, for example, and supports each voice coil 40 in the longitudinal direction.
- the end of the support part 17 is supported by the frame 12 by the holding part 15 so as to freely vibrate. That is, the voice coil 40 is formed so as to be movable only along the X-axis direction by such restriction means.
- the holding portion 15 has a damper shape that is substantially symmetrical with respect to an axis parallel to the Y-axis direction that crosses between the two magnetic circuits 20 (R) and (L). Specifically, the holding part 15 is formed in a convex shape farther from the axis.
- a vent 12B is formed on the side of the frame 12 to allow air to flow between the inside of the frame 12 and the outside of the frame 12. According to this, it is possible to suppress the braking due to the pressure in the frame 12 from being applied to the vibration of the diaphragm 10, and the diaphragm can be reliably vibrated with a small driving force.
- FIG. 34 is a perspective view of a speaker device 1T according to another embodiment of the present invention. Note that the cross-sectional perspective view of the speaker device 1T shown in FIG. 34 and the top view of the main part of the speaker device 1T shown in FIG. 34 are substantially the same except that the frame in FIGS. 32 and 33 is formed by a yoke portion. Therefore, it is omitted.
- the parts described in the above-described embodiment are denoted by the same reference numerals, and a part of the description is omitted.
- FIG. 34 a part of the magnetic circuit on the right side in the drawing is omitted.
- the speaker device 1T includes the diaphragm 10, the yoke portion 22, the edge 11, the magnetic circuit 20, the voice coil 40, the vibration direction changing portion 50, and the holding portion 15 as described in the above-described embodiment.
- the yoke portion 22 has a rectangular outer periphery, and the planar diaphragm 10 having a rectangular outer periphery corresponding to the shape is disposed in the rectangular opening of the yoke portion 22.
- An edge 11 is provided on the outer peripheral edge of the diaphragm 10, and the entire circumference of the diaphragm 10 is supported by the outer peripheral edge of the yoke portion 22 via the edge 11.
- the yoke part 22 is also a stationary part 100 arranged in a stationary state with respect to the voice coil 40. Moreover, the yoke part 22 which comprises the drive part 14 is provided with the bottom face part 22D arrange
- a vent hole 22F is formed in the side portion of the yoke portion 22 to allow air circulation between the inside of the yoke portion 22 and the outside of the yoke portion 22. According to this, it is possible to suppress the braking due to the pressure in the yoke portion 22 from being applied to the vibration of the diaphragm 10, and the diaphragm can be reliably vibrated with a small driving force.
- FIG. 35 shows a reference example of the present invention.
- the reference example shown here includes the drive units 14 (R) and 14 (L) on the side portion of the frame 12 serving as the stationary unit 100, and each of the drive units 14 (R) and 14 (L ) Are provided with vibration direction converters 50 (R), 50 (L), voice coils 40 (R), 40 (L), and magnetic circuits 20 (R), 20 (L).
- vibration direction converters 50 R
- 50 L
- voice coils 40 R
- FIG. 35 shows a reference example of the present invention.
- FIG. 35 shows a reference example of the present invention.
- the reference example shown here includes the drive units 14 (R) and 14 (L) on the side portion of the frame 12 serving as the stationary unit 100, and each of the drive units 14 (R) and 14 (L ) Are provided with vibration direction converters 50 (R), 50 (L), voice coils 40 (R), 40 (L), and magnetic circuits 20 (R), 20 (L).
- FIG. 5A magnetic circuits 20 (R) and
- FIG. 36 to 44 are explanatory views showing a speaker device 1U according to an embodiment of the present invention
- FIG. 36 is a top view
- FIG. 37 is a cross-sectional view taken along the line XX
- FIG. 38 is a rear view
- FIG. FIG. 40 is an exploded perspective view of the main part
- FIGS. 41A and 41B are partially enlarged cross-sectional perspective views of the main part
- FIGS. 42 and 43 show the second constituent member.
- the removed bottom view, FIG. 44 is an exploded perspective view). Portions that are the same as those described above are assigned the same reference numerals, and redundant descriptions are omitted.
- the vibration direction converter 50 the example shown in FIGS. 24 and 25 is employed.
- the diaphragm 10 is formed in a rectangular shape viewed from the sound radiation direction, and has an elliptical outer shape in the vicinity of the center thereof and a curved portion 10A having a concave cross-sectional shape.
- the bending direction of the diaphragm 10 and the direction of vibration of the voice coil 40 have a predetermined bending rigidity.
- the concave curved portion 10A in the diaphragm 10 the density in the curved portion 10A becomes larger than the density in a part of the other diaphragm 10, and the rigidity can be relatively increased.
- the bending portion 10 ⁇ / b> A is formed between the pair of joint portions 52 ⁇ / b> B formed between the vibration direction conversion unit 50 and the diaphragm 10. ing.
- the vibration plate 10 Since the vibration plate 10 has rigidity (including bending rigidity) in the vibration direction of the vibration plate 10, the occurrence of deflection of the vibration plate 10 is suppressed, a phase difference is generated between sound waves, and divided vibration is generated. It is possible to suppress degradation of acoustic characteristics due to occurrence. Further, the bending portion 10 ⁇ / b> A is formed on the diaphragm 10 between the pair of joint portions 52 ⁇ / b> B formed between the diaphragm 10 and the vibration direction converter vibration direction converter 50. Can be deterred.
- the diaphragm 10 is formed in a substantially rectangular shape having a short axis along the vibration direction of the voice coil 40 and a long axis along a direction orthogonal to the vibration direction of the voice coil 40.
- a reinforcing portion (not shown) may be formed along the axial direction.
- the reinforcing portion is, for example, a groove portion having a V-shaped cross section or other shape, and is formed in a linear shape, an annular shape, or a lattice shape with respect to the front surface or the back surface of the vibration plate 10.
- a filler such as a dumping agent (damping agent, braking material) may be applied (applied).
- the rigidity (including bending rigidity) of the diaphragm 10 can be improved, and the peak dip of the speaker sound pressure frequency characteristic can be reduced.
- a fiber member (not shown) made of a nonwoven fabric or the like may be attached.
- the rigidity (bending rigidity) of the diaphragm 10 can be improved by making the reinforcing part a fiber-based member, and when the diaphragm 10 vibrates, the vibration or air resistance propagates from the vibration direction changing part. It is possible to suppress deformation such as deflection in the diaphragm 10.
- the internal loss of the diaphragm 10 can be improved by providing the reinforcing portion.
- the diaphragm 10 is formed of a first layer made of a foamed resin made of an acrylic resin or the like and a second layer made of a fiber-based member such as glass fiber, and the first layer is It has a laminated structure sandwiched between a pair of second layers.
- a material for forming the diaphragm 10 for example, a resin material, a metal material, a paper material, a fiber material, a ceramic material, a composite material, or the like can be used.
- An edge 11 that supports the vibration plate 10 on the frame 12 that is the stationary portion 100 so as to freely vibrate is disposed between the vibration plate 10 and the frame 12, and an inner peripheral portion thereof supports an outer peripheral portion of the vibration plate 10, and The outer peripheral portion is joined to the frame 12 directly or via another member, thereby holding the diaphragm 10 in a specified position.
- the other member include an elastic member (including a resin member) having a function as a packing, an adhesive resin, and the like.
- the edge 11 supports the diaphragm 10 so as to freely vibrate along the vibration direction (Z-axis direction) and brakes in a direction orthogonal to the vibration direction (Y-axis direction).
- the edge 11 is formed in a ring shape (annular shape) as viewed from the acoustic radiation direction, and the cross-sectional shape thereof is a prescribed shape, for example, a concave shape, a convex shape, or a corrugated shape in the acoustic radiation direction.
- a material for forming the edge 11 for example, a known material such as leather, cloth, rubber, resin, a material obtained by applying a sealing process thereto, or a member formed by molding rubber or resin into a specified shape may be used. it can.
- a projection or a concave shape that protrudes toward the front surface (surface on the acoustic radiation side) or the back surface (surface on the opposite side to the acoustic radiation side) is formed on a part or the entire circumference of the edge 11, and the edge
- the rigidity in the 11 prescribed directions may be improved.
- the stationary part 100 is divided into a first constituent member 12C and a second constituent member 12D, and the diaphragm 10 is supported via an edge 11 in the central opening of the first constituent member 12C.
- the magnetic circuit 20 is structured to be separable into a part disposed on the upper side with the voice coil 40 interposed therebetween and another part disposed on the lower side, and the upper part is supported by the first component member 12C.
- the other part on the lower side is supported by the second component member 12D.
- the upper yoke portion 22B is supported so as to be substantially parallel to the first component member 12C and the lower yoke portion 22A is substantially parallel to the second component member 12D.
- the stationary portion 100 includes an outer peripheral frame portion 101 that surrounds the diaphragm 10 and a bridging portion 102 that bridges the inside of the outer peripheral frame portion 101.
- the bridging portion 102 is connected to the link mechanism 50L (vibration direction converting portion 50) described above. A reaction force is applied and rigidity is provided in the vibration direction of the link mechanism 50L.
- the vibration is transmitted to the diaphragm 10 via the link mechanism 50L.
- the link mechanism 50L that converts the angle of the link portion 51 is counteracted by the vibration from the diaphragm 10. Receive power.
- the link mechanism 50L receives such a reaction force, the link mechanism 50L itself vibrates when the stationary portion 100 supporting the link mechanism 50L bends, and the link mechanism 50L transmits unnecessary vibration to the link portion 51. Will do.
- unnecessary vibration transmitted to the link portion 51 is transmitted to the diaphragm 10, the vibration of the voice coil 40 cannot be efficiently transmitted to the diaphragm 10.
- the compliance of the outer peripheral frame portion 101 is prevented.
- the compliance of the bridging portion 102 is preferably substantially the same or small. More specifically, it is preferable that the thickness of the bridging portion 102 is substantially the same as or larger than the thickness of a part of the stationary portion 100 that supports the diaphragm 10 or the magnetic circuit 20.
- the bridging portion 102 provided in the second component member 12D is formed with a first protruding portion 102A that protrudes in the extending direction and in the vibration direction of the diaphragm 10.
- the first protruding portion 102A has a rib structure formed along the longitudinal direction of the bridging portion 102, thereby increasing the bending rigidity of the bridging portion 102.
- a second projecting portion 102 ⁇ / b> B extending in a direction intersecting with the first projecting portion 102 ⁇ / b> A is formed in the plane of the bridging portion 102 facing the diaphragm 10.
- This 2nd protrusion part 102B becomes a reinforcement rib in the both ends of the bridge part 102, and the bridge part 102 is rigidly supported by the outer periphery frame part 101 at the both ends.
- the bridging portion 102 has a third protrusion 102C extending in a direction intersecting the first protrusion 102A and the second protrusion 102B in the plane of the stationary portion 100 facing the diaphragm 10.
- the reinforcement part 103 having a polygonal planar shape is formed by the plurality of second protrusions 102B and the third protrusions 102C.
- the first component member 12C includes a second outer peripheral portion that supports the diaphragm 10 inside the first outer peripheral frame portion 101A, with the outer peripheral frame portion 101 of the stationary portion 100 as the first outer peripheral frame portion 101A. 101B.
- the opening inside the second outer peripheral frame portion 101 ⁇ / b> B is blocked by the edge 11 and the diaphragm 10.
- a protruding portion 101B1 protruding toward the acoustic radiation direction is formed on the second outer peripheral frame portion 101B where the diaphragm 10 is supported via the edge 11, a protruding portion 101B1 protruding toward the acoustic radiation direction is formed.
- the protrusion 101B1 obtains rigidity for supporting the periphery of the diaphragm 10.
- the first component member 12C and the second component member 12D that become the stationary part 100 have a planar shape having a major axis and a minor axis, and the bridging part 102 is formed along the minor axis direction. Further, the bridging portion 102 can be formed along the long axis direction, or can be formed along the long axis direction and the short axis direction, and the rigidity of the stationary portion 100 can be obtained.
- Convex portions 100m are formed at the four corners of the first constituent member 12C, and concave portions 100n are formed at the four corners of the second constituent member 12D, and the convex portions 100m and the concave portions 100n are fitted together to form the first configuration.
- the member 12C and the second component member 12D are coupled.
- the convex portion 100m may be formed on one of the first constituent member 12C and the second constituent member 12D, and the concave portion 100n may be formed on the other of the first constituent member 12C and the second constituent member 12D.
- the recess 100n may be formed as a hole.
- the vibration direction converter 50 includes a first link portion 51A and a second link portion 51B as a link mechanism 50L, one end of the second link portion 51B is supported by the first link portion 51A, and the other end is Supported by the bridge 102.
- the bridging portion 102 that supports the second link portion 51B is formed in a flat plate shape, and the connecting portion 104 that connects the other end of the second link portion 51B and the bridging portion 102 forms a single plane. ing.
- the other end of the second link portion 51B is engaged with the bridging portion 102, so that the vibration direction changing portion 50 and the bridging portion 102 are connected.
- a protruding portion 104A is formed on the connecting portion 104 of the bridging portion 102, and the protruding portion 104A is inserted into a connecting portion 53C formed integrally with the end portion of the second link portion 51B via the joint portion 52.
- a hole 104B is formed.
- the protruding portion 104A of the connecting portion 104 in the bridging portion 102 is a positioning portion 102E that determines the position of the vibration direction changing portion 50 with respect to the stationary portion 100.
- the protrusion 104A is inserted into the hole 104B of the connecting portion 53C that is integrally formed with the end portion of the second link portion 51B via the joint portion 52, so that the vibration direction changing portion 50 is moved with respect to the stationary portion 100. Positioning.
- the portion 51D is connected, and the stationary sixth link portion 51F of the vibration direction changing portion 50 is connected to the connecting portion 104 formed at the center portion of the bridging portion 102 in the second component member 12D.
- the fourth link portion 51D is a portion integrated with the end portion of the first link portion 51A via the joint portion 52B.
- the end of one link portion 51 ⁇ / b> A and the diaphragm 10 are connected.
- a concave portion is formed on the surface of the diaphragm 10 facing the fourth link portion 51D on the acoustic radiation side, and the diaphragm 10 has rigidity.
- the immovable sixth link portion 51F is a portion integrated with the end portion of the second link portion 51B via a joint portion 52D, and a hole 104B is formed in the sixth link portion 51F.
- the protrusion 104A of the connecting portion 104 is inserted into the hole 104B, and the connecting portion 104 and the end of the second link portion 51B are connected.
- the base 41 of the voice coil 40 has a connecting portion 60 attached to one end in the vibration direction, and the connecting portion 60 is attached so as to extend along the width of the base 41 of the voice coil 40.
- the connection portion 60 is formed with a connection step portion 60s to which the connection portion 53 of the vibration direction conversion portion 50 is detachably connected, and a through hole 60p that penetrates along the vibration direction of the base body 41 of the voice coil 40. Is formed.
- the through hole 60p is a vent hole formed to reduce the air resistance acting on the connecting portion 60 against the vibration of the voice coil 40.
- the connecting portion 60 connects the connecting portion 53 of the vibration direction changing portion 50 and the end portion of the voice coil support portion 41 (base body) with a space therebetween, and thereby within the height of the vibration direction changing portion 50.
- the height of the magnetic circuit 20 is adjusted.
- the base 41 and the connecting part 60 of the voice coil 40 are held by the first constituent member 12C and the second constituent member 12D by the holding part 15.
- the holding unit 15 includes a first holding unit 15 ⁇ / b> A and a second holding unit 15 ⁇ / b> B made of curved plate-like members that allow deformation in one direction along the vibration direction of the voice coil 40 and restrict deformation in the other direction. And.
- the first holding portion 15A and the second holding portion 15B hold the base 41 of the voice coil 40 on the first component member 12C and the second component member 12D via the mounting unit 16.
- the first holding portion 15A is formed of a conductive metal, and is electrically connected to the voice coil lead wire 43 drawn from the conductive member 30 of the voice coil 40 via the conductive layer 46. An audio signal is supplied to the conductive member 30 of the voice coil 40 via the holding portion 15A.
- the first holding portion 15A is electrically connected to the linear terminal portions 81 and 81 supported by the frame 12, and via the wirings 82 and 82 electrically connected to the terminal portions 81 and 81, respectively. Are electrically connected to the outside.
- the center portion of the second holding portion 15B is connected to the other side portion of the mounting unit 16, and both ends thereof are connected to the left and right ends of the voice coil support portion 41 (base).
- the second holding portion 15B is disposed within the width of the voice coil support portion 41 (base), and the holding mechanism of the voice coil support portion 41 (base) is arranged in the width direction of the voice coil support portion 41 (base). Try not to be bulky.
- the second holding portion 15B is formed of a continuous member, the second holding portion 15B has a continuous shape even in the central portion, but may be formed of a plurality of members and is not particularly limited. Note that a part of the second holding portion 15B is disposed so as to protrude outward from the stationary portion 100. However, the second retaining portion 15B is not limited thereto, and may be changed so as to be accommodated in the stationary portion 100.
- FIG. 40 is an exploded perspective view of the attachment of the attachment unit 16 and the second holding portion 15B as viewed from one direction.
- the second holding portion 15B which is an integral part, and the attachment unit 16 are connected via an adhesive resin.
- the flat plate portions F, F at the left and right ends of the second holding portion 15B are connected to the connection portions 41g, 41g at the left and right ends of the edge 41f arranged in the vibration direction of the voice coil support portion 41 (base body), respectively.
- the flat plate portion F at the center of the second holding portion 15B is connected to the connecting end portion 16f of the mounting unit 16 through 41g1.
- substrate) is formed in concave shape at the voice coil 40 side, and voice The voice coil support portion 41 (base body) is formed in a planar shape that can prevent the voice coil support portion 41 (base body) from vibrating due to the vibration of the coil 40 and coming into contact with the mounting unit 16.
- a relatively large gap is formed between the connecting end portion 16f of the mounting unit 16 and the edge 41f of the voice coil support portion 41 (base), and the flat plates on the left and right ends of the second holding portion 15B.
- the flat portions F at the left and right ends of the second holding portion 15B are formed with holes into which the connection portions 41g at the left and right ends of the other side edge 41f of the voice coil support portion 41 are inserted.
- the voice coil 40 In order to input voice signals to the voice coils 40 and 40 corresponding to the plurality of driving units 14, the voice coil 40 extends from one voice coil 40 of the plurality of voice coils 40 and 40 toward the other voice coil 40.
- a pair of common terminal portions 81, 81 for the voice coils 40, 40 are provided on the stationary portion 100. Further, the terminal portions 81 and 81 are provided inside the opening portion (not shown) formed between the first component member 12C and the second component member 12D that constitute the frame 12 that is the stationary portion 100. , 81 are arranged. For this reason, compared with the case where the terminal portions are provided at one end and the other end of each voice coil 40, the arrangement of the terminal portions can be saved, and the speaker device can be made smaller or thinner.
- terminal portions 81 and 81 can be stably fixed to the stationary portion 100, and poor connection with the voice coils 40 and 40 can be avoided. Further, the terminal portions 81 and 81 are formed in a shape having a major axis extending from one voice coil 40 to the other voice coil 40 and a minor axis intersecting with the major axis. Thus, by making it elongate shape, the efficiency of installation space can be improved.
- the terminal portions 81 and 81 are formed with connection portions 81a for wirings 82 and 82 (second wiring) electrically connected to the outside, and are electrically connected to the terminal portions 81 and 81 at the connection portion 81a.
- the wiring 82 (second wiring) is fixed to the side surface of the stationary portion 100 and is connected to the terminal portions 81 and 81.
- the outer peripheral frame portion 101 of the stationary portion 100 includes a side surface to which the wiring 82 is attached.
- Guide portions 106 and 106 that guide the wiring 82 are formed on the side surface of the stationary portion 100.
- a conductive layer 46 connected to the voice coil lead wire 43 drawn from the end of the conductive member 30 is formed on the voice coil support portion 41 (base body) that supports the conductive member 30 of the voice coil 40. Yes.
- the conductive layer 46 is patterned on the voice coil support portion 41 (base) so as to surround the conductive member 30 of the voice coil 40, and the conductive layer 46 electrically connects the conductive member 30 and the holding portion 15 of the voice coil 40. Connected to.
- the holding portion 15 is formed with a wiring for electrically connecting the conductive member 30 of the voice coil 40 and the terminal portion 81, and the end portions of the terminal portions 81 and 81 and the wiring are electrically connected and held.
- the wiring of the part 15 and the voice coil lead wire 43 are connected, and the wiring 82 is connected to the terminal parts 81, 81, whereby an audio signal is input to the conductive member 30 of the voice coil 40 from the outside.
- connection part F1 connected to the terminal parts 81 and 81 is formed in the holding part 15.
- the connecting portion F1 extends in a direction intersecting the vibration direction (X-axis direction) of the diaphragm 10 and is formed in a flat plate shape so as to contact the terminal portions 81 and 81.
- the holding portion 15 is also formed with a connection portion F ⁇ b> 2 connected to the conductive layer 46, extending in a direction intersecting with the vibration direction (Z-axis direction) of the diaphragm 10, and at the end of the conductive layer 46. It forms in flat form so that it may contact
- FIG. 41 is a partially enlarged view of FIG. 39 seen from a different direction.
- FIG. 41A shows that one connection surface F2 of the first holding portion 15A is connected to the connection terminal portion 46a of the conductive layer 46. It shows where it is.
- FIG. 2B shows in detail the other connecting surface F1 of the first holding portion 15A connected to the terminal portion 81.
- the connection surface F1 on one end side is connected to the terminal portion 81
- the connection surface F2 on the other end side is connected to the voice coil lead wire 43 via the connection terminal portion 46a of the conductive layer 46. .
- the terminal portion 81 electrically connects one end side of the pair of first holding portions 15A to the wiring 82 (external), and an audio signal input from the wiring 82 passes through the terminal portion 81 and the first holding portion 15A.
- the terminal portion 81 is a rod-shaped conductive member, and a positioning hole is formed. By positioning a positioning projection 111 provided on the stationary portion 100 into the positioning hole, the terminal portion 81 is positioned at a specific location in the stationary portion 100.
- a part of the terminal portion 81 is subjected to insulation treatment, and the surface of the conductive member in the region connected to the connection surface F1 of the first holding portion 15A is exposed, and the first holding portion 15A It can be connected electrically.
- the terminal portion 81 is configured by a member (insulating member) having insulation properties such as a resin member, and a conductive member is provided on the insulating member to be electrically connected to the connection surface F1 of the holding portion 15. It doesn't matter.
- the attachment unit 16 includes a first connection portion 16a to which the end portion of the first holding portion 15A is connected on both the left and right sides of the connecting portion 60, and a second connection portion to which the second holding portion 15B is connected. 16b is provided behind the voice coil 40, and has an integrated support portion 16c that integrally supports the first connection portion 16a and the second connection portion 16b. In addition, the four corners of the attachment unit 16 are provided with connection hole portions 16d facing the convex portions 100m provided in the first component member 12C of the stationary portion 100.
- the voice coil support portion 41 base body
- the connecting portion 60 the holding portion 15, and the mounting unit 16 are connected. It is unitized and is fixed between the first component member 12C and the second component member 12D.
- the voice coil lead wire 43 of the voice coil 40 is drawn from the conductive member 30, and at least a part of the voice coil lead wire 43 is disposed outside the magnetic gap 20G.
- the outer shape of the yoke portion 22B is indicated by a dotted line, and a region surrounded by the dotted line is a magnetic space formed between the yoke portions 22A and 22B, and the conductive member 30 is further formed in this magnetic space.
- a pair of magnetic gaps 20G in which a part of the magnetic gap is disposed is formed.
- the annular conductive member 30 is supported on the surface of the base body 41, and a pair of voice coil lead wires 43 ⁇ / b> A and 43 ⁇ / b> B extends in the X-axis direction, which is the vibration direction of the voice coil 40. Each is pulled out along.
- a pair of conductive layers 46C and 46D are formed on the outer surface of the conductive member 30 in the base 41 so as to surround the conductive member 30, and the ends of the pair of voice coil lead wires 43 are formed on the conductive layers 46C and 46D. Each is connected.
- one voice coil lead wire 43A has an inner lead portion 43a disposed on the inner peripheral portion of the conductive member 30, and a connection portion 43b connected to one conductive layer 46C, and the other voice coil lead wire.
- 43B has an outer lead portion 43c disposed on the outer peripheral portion of the conductive member 30 and a connection portion 43d connected to the other conductive layer 46D.
- a magnetic gap extends from the lead portions 43a and 43b to the connection portions 43c and 43d. It is arranged outside 20G.
- the one voice coil lead wire 43A is disposed along the surface of the conductive member 30, and insulates between the one voice coil lead wire 43A and the conductive member 30, so that an insulating sheet is interposed between them. 44A is interposed.
- the first component member 12 ⁇ / b> C or the second component member 12 ⁇ / b> D that becomes the stationary unit 100 is provided with a plurality of projecting portions that project toward the voice coil 40.
- a plurality of the protruding portions are formed as excessive vibration suppressing portions 12E for restricting the vibration range of the voice coil 40 and suppressing excessive vibration.
- a notch 41 f is formed at the edge of the base body 41.
- the excessive vibration suppression unit 12E is disposed in the notch 41f, and the width of the notch 41f in the vibration direction of the voice coil 40 is a substantial amplitude of the voice coil 40.
- the excessive vibration suppression unit 12E When the voice coil 40 vibrates excessively, the excessive vibration suppression unit 12E hits the base body 41 of the voice coil 40 and the like, thereby restricting the vibration range of the voice coil 40 and suppressing excessive vibration.
- the excessive vibration suppression portion 12E is configured by a protrusion of the first component member 12C.
- the present invention is not limited to this.
- the excessive vibration suppression portion 12E may be formed by covering the protrusion with a tube formed of silicone resin. It may be changed as necessary.
- the width of the magnetic gap 20G may be made relatively small to increase the magnetic flux density in the magnetic gap 20G as much as possible.
- the voice coil lead wire 43 is disposed outside the magnetic gap 20G, the width 20G of the magnetic gap can be reduced and the magnetic flux density can be increased.
- the voice coil lead wire 43 is constituted by a part of the conductive member 30, that is, when it is constituted by an electric wire, a change over time occurs in which a part of the conductive member 30 is lifted from the surface of the voice coil 40.
- the voice coil lead wire 43 is disposed in the magnetic gap 20G in the magnetic gap 20G, it may come into contact with the magnetic body constituting the magnetic circuit such as the magnet 21 and the yoke portions 22A and 22B. Concerned.
- the voice coil lead wire 43 since the voice coil lead wire 43 is disposed outside the magnetic gap 20G, it can be prevented from contacting the magnetic material.
- the excessive vibration suppressing unit 12E When the voice coil 40 vibrates excessively, the excessive vibration suppressing unit 12E hits the base body 41, so that excessive vibration of the voice coil 40 can be suppressed.
- the excessive vibration suppression portion 12E is configured by a protrusion of the first component member 12C.
- the present invention is not limited to this.
- the excessive vibration suppression portion 12E may be formed by covering the protrusion with a tube formed of silicone resin. It may be changed as necessary.
- the magnetic circuit 20 of the speaker device 1U has two magnetic gaps 20G having different magnetic flux densities arranged along the vibration direction (X-axis direction) of the voice coil 40.
- a voice coil lead wire 43 is arranged in the vicinity of one magnetic gap 20G on the side where the magnetic flux density is small.
- the magnetic flux density is reduced by making the area of the magnet and the yoke part of the magnetic circuit 20 with respect to the conductive member 30 of the voice coil 40 smaller outside than the inside in the X-axis direction.
- the lead wires 43A and 43B are arranged outward in the X-axis direction. For this reason, the electromagnetic force acting on the voice coil lead wires 43 ⁇ / b> A and 43 ⁇ / b> B can be made relatively small, and occurrence of unnecessary vibration in the voice coil 40 can be suppressed.
- the drawing direction of the voice coil lead lines 43A and 43B is drawn along the same X-axis direction as the vibration direction of the voice coil 40.
- the connection portions 43c and 43d may be connected to the conductive layers 46E and 46F by being drawn out along the Y-axis direction intersecting with the vibration direction of the voice coil 40.
- the conductive layers 46E and 46F can be shortened without detouring like the conductive layers 46C and 46D shown in FIG.
- the vibration direction conversion unit 50 is, for example, an adhesive or a double-sided tape as a bonding member with respect to the mounting member 200 including the vibration plate 10 or the voice coil 40 or other members other than the vibration plate 10 and the voice coil 40. They are connected by a connecting member such as a screw as a fastening member, and the joint portion 52 is arranged so as to be close to the attached member 200.
- a contact avoiding portion 70 that avoids contact with the joint portion 52 is formed on the surface side of the attached member 200 adjacent to the joint portion 52 of the vibration direction converting portion 50.
- the contact avoiding portion 70 also functions as a joining member restraining portion that restrains the joining member that joins the vibration direction changing portion 50 and the attached member 200.
- the contact avoiding portion 70 is formed in a concave shape along the joint portion 52, for example, a concave portion, a notch portion, a groove portion or the like, and the joint portion 52 and the surface of the attached member 200 disposed in the vicinity of the joint portion 52.
- a predetermined space is formed between the joint portion 52 and the adhesive member interposed between the vibration direction changing portion 50 and the attached member 200.
- a concave portion 71 is formed as a contact avoiding portion 70 in the third link portion 51C of the vibration direction changing portion 50 to be the attached member 200 so as to be close to the joint portion 52A.
- the concave portion 72 is formed as the contact avoiding portion 70 so as to be close to the joint portion 52B
- the concave portion 76 is formed as the contact avoiding portion 70 so as to be close to the joint portion 52F.
- each joint part which the vibration direction conversion part 50 has can be formed with the continuous member which can be bent or refracted.
- each link part which the vibration direction conversion part 50 has can be formed with a rigid member.
- each joint part and the rigid part continuing to the joint part can be integrally formed.
- Each link portion is formed by a rigid member, and each joint portion formed at both ends of the link portion is formed by a bendable continuous member that is continuous at both sides across the joint portion.
- the continuous member include a woven or non-woven fabric of high-strength fibers, a resin film composed of a resin member, and the like.
- FIG. 44 is an explanatory diagram showing an assembly process of the entire speaker device.
- the connection parts 53 (R) and 53 (L) of the vibration direction conversion part 50 are inserted into the connecting part 60, respectively, so that the vibration direction conversion part 50 and the unit
- the integrated voice coil 40, connecting part 60, holding part 15 (first holding part 15A, second holding part 15B) and mounting unit 16 are integrated, and above the voice coil 40, the upper side of the magnetic circuit 20 is integrated.
- the yoke portion 22B and the lower yoke portion 22A are respectively disposed and sandwiched between the first component member 12C and the second component member 12D.
- the immovable sixth link portion 51F of the vibration direction converting portion 50 is fitted to the support base 13A formed on the bottom portion 12A of the second component member 12D and is immovably supported.
- Other parts are also positioned at predetermined positions with respect to the first component member 12C and the second component member 12D.
- the stationary portion 100 is fixed at a predetermined position with respect to the stationary portion 100. .
- the yoke portion 22B on the upper side of the magnetic circuit 20 is incorporated into the inner surface of the first component member 12C, and then the attachment unit 16, the vibration direction changing portion 50, etc. are sequentially incorporated and positioned. Thereafter, the second component member 12D is overlapped to sandwich each component, and the lower yoke portion 22A of the magnetic circuit 20 is incorporated. Accordingly, the convex portion 100m formed on the first component member 12C is inserted into the positioning hole 16d of the mounting unit 16 and the concave portion 100n of the second component member 12B, so that the voice coil support portion 41 ( The base body), the connecting portion 60, the holding portion 15, and the mounting unit 16 are fixed between the first component member 12C and the second component member 12D.
- the second connecting portion 53B of the vibration direction changing portion 50 and the vibration plate 10 are joined with an adhesive as a joining member, and the outer peripheral portion of the vibration plate 10 has the first configuration via the edge 11. It is attached to the mouth edge of the central opening of the member 12C.
- a gap is formed between the first component member 12C and the upper yoke portion 22B disposed in the vicinity of the first component member 12C, so that the vibration of the diaphragm 10 is on the upper side. Propagation to the magnetic circuit 20 via the yoke portion 22 ⁇ / b> B is prevented from inducing contact between the magnetic circuit 20 and the voice coil 40.
- the assembly process may be as follows. First, the wiring 82 is connected to the connection terminals 81, 81, and the magnet 21 is joined to the yoke portion 22. Next, the connection terminals 81 and 81 to which the wiring 82 is connected are attached to the outer peripheral frame portion 101A of the first component member 12C. Next, the pair of attachment units 16 to which the above-described voice coil 40 is attached are attached to the first component member 12C. At this time, the connection terminals 81, 81 and the holding portion 15A attached to the attachment unit 16 are electrically connected using solder or the like. Next, the vibration direction conversion unit 50 is attached to the connecting unit 104 and the vibration direction conversion unit 50 and the voice coil 40 are connected.
- the second component member 12D is arranged on the first component member 12C, and the magnetic pole member (yoke portion) 22 in which the magnet 21 is joined to the outer peripheral frame portion 101A of the second component member 12D is attached.
- the diaphragm 10 and the edge 11 are attached to the second outer peripheral frame portion 101B of the first component member 12C.
- the magnetic pole member (yoke part) 22 which attached the magnet 21 to the 1st outer periphery frame part 101A of the 1st structural member 12C is attached.
- the wiring 82 is attached to the guide portion 106 provided on the first outer peripheral frame portion 101A of the first component member 12C.
- the frame 12 serving as the stationary part 100 includes the first component member (first frame) 12C and the second component member (second frame) 12D, and the first component member 12C is the speaker device 1U.
- the second component member 12D is disposed on the opposite side (back side) to the acoustic radiation side.
- the drive unit 14 of the speaker device 1 is supported so as to be sandwiched between the first component member 12C and the second component member 12D.
- the outer peripheral frame portion 101 formed in an annular shape included in the first component member 12C supports one side (22B) of the magnetic pole member (yoke portion) 22 of the magnetic circuit 20.
- the second component member 12D includes an outer peripheral frame portion 101 and a bridging portion 102, and supports one side (22A) of the magnetic pole member (yoke portion) 22 of the magnetic circuit 20.
- the first component member 12 ⁇ / b> C and the second component member 12 ⁇ / b> D include a concave receiving portion 105 that accommodates a part of the yoke portion 22.
- a protrusion 22p is fitted into the receiving portion 105, and the yoke portion 22 is positioned in order to form an appropriate magnetic gap.
- an opening 101S is formed between the outer peripheral frame portion 101 and the bridging portion 102 in the second component member 12D.
- the outer peripheral frame portion 101 is formed with a fourth protrusion (not shown) along the outer peripheral edge of the opening 101S. The fourth protrusion increases the torsional rigidity of the outer peripheral frame portion 101.
- an excessive vibration suppression unit (not shown) for suppressing excessive vibration of the voice coil 40 is formed in the first component member 12C.
- the excessive vibration suppression unit protrudes into the movable region of the voice coil 40, and the excessive vibration of the voice coil 40 is suppressed by hitting the voice coil support unit 41 (base).
- the magnetic circuit 20 is mounted on the first component member 12C and the second component member 12D with the magnetic pole member 22 joined to the magnet.
- the magnetic pole member 22 includes a plurality of protrusions 22p, and the protrusions 22p are supported by the receiving portion 105.
- the yoke portion 22, which is a plate-like magnetic body, has a width that decreases from the vibration direction changing portion 50 to the stationary portion 100, thereby preventing the holding portion 15 from contacting the yoke portion 22. .
- the yoke portions 22A and 22B are attached to the first component member 12C and the second component member 12D, and the first component member 12C and the second component member 12D are coupled to each other so that the yoke portion A gap as a magnetic gap 20G is provided between 22A and 22B or between the magnets 21.
- the height of the magnetic circuit 20 is almost the entire height of the entire device, and the voice coil 40 vibrates in the vicinity of the center of the magnetic circuit 20.
- the end of the conversion unit 50 is connected at different heights via the connecting unit 60.
- each link portion of the vibration direction conversion unit 50 can ensure a sufficient length within the height of the device, and a part of the height of the magnetic circuit 20 is set to the height of the vibration direction conversion unit 50. It is possible to fit in.
- FIG. 45 shows a modification of the speaker device according to the embodiment of the present invention. Portions common to the above description are given the same reference numerals and redundant description is omitted.
- a yoke part 22 formed of a plate-like magnetic body is laminated.
- the yoke parts 22B and 22B1 made of two laminated magnetic bodies are supported on the first component 12C side that supports the diaphragm 10, and the two laminated magnets are arranged on the second component 12D side.
- the yoke portions 22A and 22A1 made of a body are supported.
- the magnetic gap of the magnetic circuit 20 is formed between the magnets 21 and 21 and the yoke portions 22A and 22B adjacent to each other.
- the speaker device according to the embodiment of the present invention can be reduced in thickness and can be increased in volume.
- a thin speaker device capable of emitting a large volume of reproduced sound with a relatively simple structure can be obtained by vibrating the diaphragm in a direction different from the vibration direction of the voice coil.
- the joint portion of the link mechanism needs to be durable enough to withstand the high-speed repeated vibration required for the speaker device.
- the joint portion of the link mechanism can have durability and flexibility.
- the link mechanism itself needs to be lightweight. Furthermore, there may be a need for ease of work when such a link mechanism is incorporated into the speaker device and ease of manufacture when the link mechanism itself is manufactured. With the configuration of the speaker device described above, weight reduction and manufacturability are possible.
- FIG. 46 is an explanatory diagram showing an electronic device including the speaker device according to the embodiment of the invention.
- the electronic device 2 such as the mobile phone or the portable information terminal shown in FIG. 5A, or the electronic device 3 such as the flat panel display shown in FIG.
- the speaker device 1 is housed in the housing or the speaker device 1 is attached to the side surface of the housing as a member to be attached to the electronic device, the thickness space necessary for installing the speaker device 1 can be reduced. The overall thickness can be reduced. In addition, sufficient audio output can be obtained even in a thin electronic device.
- FIG. 47 is an explanatory view showing an automobile provided with the speaker device according to the embodiment of the present invention.
- the space in the vehicle can be expanded by making the speaker device 1 thinner.
- the speaker device 1 according to the embodiment of the present invention is attached to a door panel or ceiling as a member to be attached, the protrusion of the door panel or ceiling can be made relatively small, and the driver's operation space can be expanded and the indoor space can be expanded. It becomes possible to do. Also, since sufficient audio output can be obtained, music and radio broadcasting can be enjoyed comfortably in the car even during high-speed driving with a lot of noise.
- a hotel, inn or training that can accommodate a large number of people, such as a house (building) intended for the residence of people, a meeting, a lecture, a party, etc.
- facilities, etc. buildings
- the speaker device 1 when the speaker device 1 is installed on a wall or ceiling as a member to be attached, the thickness space required for the installation of the speaker device 1 can be reduced, so unnecessary space in the room can be deleted, Space can be used effectively.
- projectors and large-screen TVs, etc. there have been examples of providing living rooms with audio / video equipment, while living rooms without audio / video equipment have been provided. In some cases, etc. are used as theater rooms.
- the speaker device 1 Even in such a case, by using the speaker device 1, it is possible to easily convert a living room or the like into a theater room and to effectively use the space in the living room.
- positioning location of the speaker apparatus 1, the ceiling, wall, etc. (attachment member) in a living room are mentioned, for example.
- 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).
- 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, PCT / JP2008 / 068580 filed internationally on October 27, 2008.
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Abstract
Description
一つには、ボイスコイルの一軸方向の振動を、剛性の振動方向変換部を介して振動板に伝え、該振動板を前記一軸方向とは異なる方向に振動させるスピーカ装置に用いられるボイスコイルであって、前記ボイスコイルは、平面状で且つ環状に巻かれた導電部材を備え、少なくとも平面方向に沿った振動方向に対して剛性を有することを特徴とするスピーカ装置用ボイスコイル。
図2は、本発明の実施形態に係るスピーカ装置用ボイスコイルの説明図(中心Oから右側の断面図)である。ボイスコイル40は平面状で且つ環状に巻かれた導電部材30からなり、少なくとも平面方向に沿った振動方向(X軸方向)に対して剛性を有している。導電部材30は各種形態の巻き線31を平面状に巻き回すことによって形成されている。同図(a),(b)に示した例では、巻き線31(31a,31b)自体が多角形(矩形)の断面を有し且つ少なくとも振動方向(X軸方向)に対して剛性を有している。同図(a)に示した例では、振動方向(X軸方向)に垂直な方向に長い断面形状を有する巻き線31aを1層巻きにしており、同図(b)に示した例では、振動方向に長い断面形状を有する巻き線31bを振動方向(X軸方向)に垂直な方向に重ねた多層巻きにしている。
図15~図17は、前述した剛性を有するボイスコイル40を振動させるための磁気回路を説明するための説明図である。
図18~図20は、本発明の実施形態に係るボイスコイルを備えたスピーカ装置の全体構成を示した説明図である。スピーカ装置1,1A,1B,1C,1Dは、ボイスコイル40と、ボイスコイル40を振動させる磁気回路20とを備えた駆動部14と、音声信号によって駆動部14からの振動が伝えられる振動板10と、駆動部14と振動板10とを支持する静止部100とを備えている。静止部100は、振動板10及び駆動部14等の振動を支持する部位の総称であって、ここでは、フレーム12、フレーム12の機能を兼ねた後述するヨーク部、取付ユニット等が静止部100にあたる。静止部100は、それ自体が完全に静止していることを意図するわけではなく、それ全体が駆動部14の振動の影響を受けて、或いは他の力を受けて、振動するものであってもよい。振動板10の外周部はエッジ11を介して静止部100であるフレーム12に支持されている。また、フレーム12には必要に応じて通気孔12Bが設けられている。駆動部14は、ボイスコイル40の振動を角度変換して振動板10に伝える振動方向変換部50を備え、振動方向変換部50は、振動板10の振動方向およびボイスコイル40の振動方向それぞれに対して斜設された剛性のリンク部分51を備えている。
図21及び図22は、本発明の実施形態に係るボイスコイルを静止部となるフレームに保持する機構を示す説明図である。本発明の実施形態に係るボイスコイル40は、保持部15によって直接又は他の部材を介して静止部100となるフレーム12に保持される。
図18及び図19に示したスピーカ装置1,1Aでは、振動方向変換部50は一つのリンク部分51,関節部52A,52Bによって形成されており、リンク部分51の角度変化によってボイスコイル40のX軸方向の振動を振動板10のX軸方向以外(例えばZ軸方向)の振動に変換している。図20に示したスピーカ装置1B,1C,1Dでは、振動方向変換部50は、第1のリンク部分51A,第2のリンク部分51B,関節部52A,52B,52C,52Dによってリンク機構50Lが形成されている。この例では第2のリンク部分51Bと静止部100となる支持台13との関節部52Dが位置変位しない関節部であって、他の関節部52A,52B,52Cは位置が変位する関節部になっている。これによって、全体のリンク機構50Lは関節部52Dにおいて静止部100からの反力を受ける構造になっている。このリンク機構50Lでは、関節部52Aがボイスコイル40の振動によってX軸方向に移動すると、関節部52BはZ軸方向に沿って移動することになり、ボイスコイル40の振動を方向変換して振動板10に伝える。
図27は、ボイスコイル40の変形例を示した説明図であり、巻き芯の外周に沿って巻き線等の導線を平面状に巻き回すことで環状の導電部材30が形成されている。同図(a)に示した例は、基体41の中央に形成された凸状の巻き芯41dの周りに導線を巻き回している。さらに必要に応じて、巻き線からなる導電部材30の表面に、例えば樹脂フィルム等からなる保護膜32を貼り付けてもよい。一方、導線で形成された導電部材30は、時間の経過と共に、経時的な形状変化により、導電を巻き回す際に生じる応力(ストレス)が原因で導線の一部が浮き上がってくる。この浮き上がりを保護膜32によって抑止することができる。
以下に、本発明の実施例について、図面を参照しながら説明する。図30は、本発明の実施例に係るスピーカ装置1Sの斜視図である。図31は図30に示したスピーカ装置1Sの断面斜視図である。図32は、図30に示したスピーカ装置1Sの要部の上面図である。図33は、図30に示したスピーカ装置1Sの要部の上面図である。以下、前述した実施形態で説明した箇所は同一符号を付して一部説明を省略する。図32,図33では、振動板は省略している。図31において、図に向かって右側の磁気回路の一部は省略している。
Claims (65)
- ボイスコイルの一軸方向の振動を、剛性の振動方向変換部を介して振動板に伝え、該振動板を前記一軸方向とは異なる方向に振動させるスピーカ装置に用いられるボイスコイルであって、
前記ボイスコイルは、平面状で且つ環状に巻かれた導電部材を備え、少なくとも平面方向に沿った振動方向に対して剛性を有することを特徴とするスピーカ装置用ボイスコイル。 - 前記ボイスコイルは、剛性の基体にて支持されることによって剛性を有することを特徴とする請求項1記載のスピーカ装置用ボイスコイル。
- 前記基体の表面に前記導電部材が配置されることを特徴とする請求項2記載のスピーカ装置用ボイスコイル。
- 前記基体には、環状の段部が形成されており、
前記段部に前記導電部材が配置されていることを特徴とする請求項3記載のスピーカ装置用ボイスコイル。 - 前記基体及び前記導電部材が環状に形成されて、開口部を有することを特徴とする請求項4記載のスピーカ装置用ボイスコイル。
- 前記基体の内周部から内側に向かって形成される剛性の載置部には、前記導電部材の一部が載置されて接合されることを特徴とする請求項5記載のスピーカ装置用ボイスコイル。
- 少なくとも2つの前記基体にて、前記導電部材が挟持されていることを特徴とする請求項2記載のスピーカ装置用ボイスコイル。
- 前記2つの基体の間の空隙を埋めるように、内部充填部材が配置されていることを特徴とする請求項2記載のスピーカ装置用ボイスコイル。
- 前記内部充填部材は、前記基体より剛性が大きいことを特徴とする請求項8記載のスピーカ装置用ボイスコイル。
- 前記内部充填部材は、前記基体と同じ材質で形成されていることを特徴とする請求項8記載のスピーカ装置用ボイスコイル。
- 前記基体の厚さは、前記内部充填部材又は前記導電部材の厚さより薄いことを特徴とする請求項2記載のスピーカ装置用ボイスコイル。
- 前記基体における前記導電部材の外側の表面には、導電層がパターン形成されていることを特徴とする請求項2に記載のスピーカ装置用ボイスコイル。
- 前記導電層は、前記導電部材を取り囲むように一対配備され、前記導電部材に音声信号を入力するための中継線として機能することを特徴とする請求項12に記載のスピーカ装置用ボイスコイル。
- 前記導電層は、環状に形成されていることを特徴とする請求項12に記載のスピーカ装置用ボイスコイル。
- 複数の前記導電層が、ボイスコイルの振動方向に沿って、前記導電部材の両側にパターン形成されていることを特徴とする請求項14に記載のスピーカ装置用ボイスコイル。
- 複数の前記導電層の一方は閉じた形状を有し、他方は開いた形状を有することを特徴とする請求項15に記載のスピーカ装置用ボイスコイル。
- 前記一方の導電層はショートリング層であり、
前記ショートリング層の幅は、前記導電部材の幅に対し、略同じ又は小さいことを特徴とする請求項16記載のスピーカ装置用ボイスコイル。 - 前記導電部材は中心側から外側に向けて異なる径で巻かれ、前記2つの基体の間に配置されていることを特徴とする請求項7に記載のスピーカ装置用ボイスコイル。
- 同径に巻かれた前記導電部材が、前記基体の厚さ方向に積層されていることを特徴とする請求項18に記載のスピーカ装置用ボイスコイル。
- 前記導電部材が多角形断面を有することを特徴とする請求項19に記載のスピーカ装置用ボイスコイル。
- 請求項1に記載のスピーカ装置用ボイスコイルと、前記ボイスコイルを振動させる磁気回路とを備えた駆動部と、
音声信号によって前記駆動部からの振動が伝えられる振動板と、
前記駆動部と前記振動板とを支持する静止部とを備え、
前記駆動部は、前記ボイスコイルの振動を角度変換して振動板に伝える振動方向変換部を備え、
前記振動方向変換部は、前記振動板の振動方向および前記ボイスコイルの振動方向それぞれに対して斜設された剛性のリンク部分を備えることを特徴とするスピーカ装置。 - 前記ボイスコイルの平面形状が、その振動方向に直交する方向に長い横長形状に形成されていることを特徴とする請求項21に記載のスピーカ装置。
- 前記ボイスコイルは、その振動方向に直交する方向における幅が、振動方向における前記導電部材の両端部の間で略同じであり、
前記導電部材の端部の近傍から前記ボイスコイルの前記振動方向変換部と連結される端部に向かって徐々に幅狭に形成されていることを特徴とする請求項22に記載のスピーカ装置。 - 前記導電部材の一部は、前記ボイスコイルと外部とを電気的に接続する引出線であることを特徴とする請求項23に記載のスピーカ装置。
- 前記振動方向変換部の前記振動板とは逆側に前記静止部が設けられ、
前記振動方向変換部は、前記ボイスコイルと前記振動板との間に形成されたリンク部分を角度変換させるリンク機構を備えることを特徴とする請求項21に記載のスピーカ装置。 - 前記振動方向変換部は、一端部が前記駆動部に角度変更自在に直接又は他の部材を介して連結されるとともに、他端部が前記振動板に角度変更自在に直接又は他の部材を介して連結され、
前記振動板の振動方向および前記駆動部の移動方向それぞれに対して斜設されて配置されることを特徴とする請求項21に記載のスピーカ装置。 - 前記振動方向変換部における前記ボイスコイル側の端部と前記ボイスコイルの前記振動方向変換部側の端部とを連結する連結部を備え、
前記連結部を、前記静止部に直接又は他の部材を介して、前記ボイスコイルの振動方向に振動自在に保持する第1の保持部を備えることを特徴とする請求項21に記載のスピーカ装置。 - 前記ボイスコイルを、前記静止部に直接又は他の部材を介して、当該ボイスコイルの振動方向に振動自在に保持する第2の保持部を備えることを特徴とする請求項27に記載のスピーカ装置。
- 前記第1の保持部は前記連結部に対して左右に配置され、
前記第2の保持部は前記ボイスコイルに対して左右に配置され、
前記第1の保持部及び前記第2の保持部は前記ボイスコイルを略左右対称に前記静止部に直接又は他の部材を介して保持することを特徴とする請求項28に記載のスピーカ装置。 - 前記第2の保持部は、中央部が直接又は他の部材を介して前記静止部に保持され、その両端が前記ボイスコイルの左右端に接続されていることを特徴とする請求項28記載のスピーカ装置。
- 前記第1の保持部及び前記第2の保持部は、取り付けユニットを介して前記連結部及び前記ボイスコイルを前記静止部に保持することを特徴とする請求項28に記載のスピーカ装置。
- 前記ボイスコイルが直線的に振動するように該ボイスコイルを前記静止部に直接又は他の部材を介して保持する保持部を備え、
音声信号入力端子に入力された音声信号が前記保持部を介して前記導電部材に入力されることを特徴とする請求項21に記載のスピーカ装置。 - 前記保持部は、導電性材料で形成され、前記ボイスコイル側の端部で前記導電部材と電気的に接続され、前記静止部側の端部で前記音声信号入力端子と電気的に接続されていることを特徴とする請求項32に記載のスピーカ装置。
- 前記振動方向変換部のリンク機構は前記リンク部分によって平行リンクが形成されていることを特徴とする請求項25記載のスピーカ装置。
- 前記振動方向変換部は、
一端を前記ボイスコイル側の関節部とし、他端を前記振動板側の関節部とする第1のリンク部分と、
一端を前記第1のリンク部分の中間部との関節部とし他端を前記静止部との関節部とする第2のリンク部分とを有し、
前記第1のリンク部分と前記第2のリンク部分を前記ボイスコイルの振動方向に対して異なる方向に傾斜配置したことを特徴とする請求項34に記載のスピーカ装置。 - 前記振動方向変換部は、
前記連結部から一体的に延設されて前記ボイスコイルの振動方向に沿って延在する第3のリンク部分と、
一端を前記第3のリンク部分との関節部とし他端を前記振動板側の関節部として前記第1のリンク部分と平行に配置される第4のリンク部分とを有することを特徴とする請求項35に記載のスピーカ装置。 - 前記振動方向変換部は、
前記リンク機構を互いに対向配置し、各リンク機構に振動方向が対向するように前記ボイスコイルを連結し、前記ボイスコイル毎に前記磁気回路を設けたことを特徴とする請求項25に記載のスピーカ装置。 - 前記静止部は、フレームであることを特徴とする請求項21に記載のスピーカ装置。
- 前記静止部は前記振動方向変換部における動かないリンク部分によって形成されることを特徴とする請求項25記載のスピーカ装置。
- 前記振動板を前記フレームに支持するエッジを備え、
前記磁気回路は、磁石、ヨーク部を備えることを特徴とする請求項38記載のスピーカ装置。 - 前記静止部は、前記磁気回路を構成する構成部材であることを特徴とする請求項21に記載のスピーカ装置。
- 前記フレームとして静止部が設けられ、
前記振動方向変換部は、前記ボイスコイルの振動と前記静止部から受ける反力によって前記リンク部分を角度変更させるリンク機構を備えることを特徴とする請求項38のスピーカ装置。 - 前記フレームは平面状の底部を有し、前記振動板は前記フレームの底部に沿って平面的に支持され、前記磁気回路の磁気ギャップは前記フレームの底部に沿って形成され、前記振動方向変換部は前記フレームの底部によって前記静止部を形成し、当該底部と交差する方向に前記振動板を振動させることを特徴とする請求項38に記載のスピーカ装置。
- 前記磁気回路は、互いに逆方向の磁場が形成される一対の磁気ギャップが前記ボイスコイルの振動方向に沿って並べて配置され、
前記ボイスコイルは、前記一対の磁気ギャップで逆方向に電流が流れる一対の直線部を有し、前記一対の磁気ギャップを巡回するように配置されていることを特徴とする請求項38に記載のスピーカ装置。 - 前記ボイスコイルは、剛性の基体にて支持されることによって剛性を有し、
前記基体における前記導電部材の外側の表面には、複数の導電層がパターン形成されていることを特徴とする請求項21に記載のスピーカ装置。 - 複数の前記導電層の一方は閉じた形状を、他方は開いた形状を有し、
前記一方の導電層はショートリング層であり、
前記ショートリング層の幅は、前記磁気ギャップの幅に対し、略同じ又は小さいことを特徴とする請求項45に記載のスピーカ装置。 - 環状に巻かれた導電部材を備え、少なくとも振動方向に対して剛性を有するボイスコイルと、前記ボイスコイルを振動させる磁気回路とを備えた駆動部と、
音声信号によって前記駆動部からの振動が伝えられる振動板と、
前記駆動部と前記振動板とを支持する静止部とを備え、
前記駆動部は、前記ボイスコイルの振動を角度変換して振動板に伝える剛性の振動方向変換部を備え、
前記振動方向変換部は、一端部が前記ボイスコイルに角度変更自在に直接又は他の部材を介して連結されるとともに、他端部が前記振動板に角度変更自在に直接又は他の部材を介して連結され、
前記振動板の振動方向および前記ボイスコイルの振動方向それぞれに対して斜設された剛性のリンク部分を備えることを特徴とするスピーカ装置。 - 前記フレームとして静止部が設けられ、
前記振動方向変換部は、前記ボイスコイルの振動と前記静止部から受ける反力によって前記リンク部分を角度変換させるリンク機構を備えることを特徴とする請求項47のスピーカ装置。 - 請求項1に記載のスピーカ装置用ボイスコイルと、前記ボイスコイルを振動させる磁気回路とを備えた駆動部と、
音声信号によって前記駆動部からの振動が伝えられる振動板と、
前記駆動部と前記振動板とを支持する静止部とを備え、
前記スピーカ装置用ボイスコイルの導電部材は、前記磁気回路の磁気ギャップに配置されており、
前記ボイスコイルが有するボイスコイル引き出し線は、前記導電部材から引き出され、
前記ボイスコイル引き出し線の少なくとも一部が、前記磁気ギャップの外側に配置されていることを特徴とするスピーカ装置。 - 前記ボイスコイル引き出し線の引出部は、前記磁気ギャップの外側に設けられていることを特徴とする請求項49に記載のスピーカ装置。
- 前記ボイスコイル引き出し線は、外部と接続する接続部を備え、
前記引出部から前記接続部にかけて、前記ボイスコイル引き出し線は前記磁気ギャップの外側に配置されること
を特徴とする請求項50に記載のスピーカ装置。 - 前記導電部材が基体に支持され、該基体における前記導電部材の外側の表面には、導電層がパターン形成されており、
前記ボイスコイル引き出し線は、前記導電層に接続されること
を特徴とする請求項49に記載のスピーカ装置。 - 前記ボイスコイル引き出し線は、前記ボイスコイルの振動方向に沿って引き出されることを特徴とする請求項52に記載のスピーカ装置。
- 前記ボイスコイル引き出し線は、前記ボイスコイルの振動方向に対し交差する方向に沿って引き出されることを特徴とする請求項52に記載のスピーカ装置。
- 前記磁気回路は、前記ボイスコイルの振動方向に沿って配列した2つの磁気ギャップを備え、
前記磁気ギャップのうち、磁束密度が小さい側の前記一方の磁気ギャップの近傍に、前記ボイスコイル引き出し線が配置されていることを特徴とする請求項52に記載のスピーカ装置。 - 前記磁気ギャップを構成する2つの磁極部は、対向する面が傾斜状に形成されると共に、前記磁極部の一方の端部間における前記磁気ギャップの幅が、前記他方の端部間における前記磁気ギャップの幅に対して大きくなっており、
前記ボイスコイル引き出し線の引出部は、前記一方の端部の近傍に配置されていることを特徴とする請求項52に記載のスピーカ装置。 - 前記ボイスコイルには、その振動方向に沿って延在する端縁に切欠部が形成されており、
前記静止部には、前記ボイスコイルに向かって突出し、前記切欠部の内側に一部分が配置される突出部が形成されていることを特徴とする請求項1に記載のスピーカ装置。 - 前記ボイスコイルの振動方向における前記切欠部の幅は、該ボイスコイルの振幅と実質的に同じ又は大きいことを特徴とする請求項57に記載のスピーカ装置。
- 前記振動方向変換部における前記ボイスコイル側の端部と前記ボイスコイルの前記振動方向変換部側の端部との間に両端部の位置を前記振動方向に沿って異ならせて連結する連結部を備えることを特徴とする請求項21に記載のスピーカ装置。
- 前記振動方向変換部は、前記振動板及び前記ボイスコイルを含む被取付部材と連結しているとともに、該被取付部材に近接する関節部分を備え、
前記関節部分に近接する前記被取付部材の面側には、前記関節部分と接触することを避ける接触回避部が形成されていることを特徴とする請求項21に記載のスピーカ装置。 - 前記振動方向変換部は、前記振動板および前記ボイスコイルを含む被取付部材と連結しているとともに、該被取付部材に近接する関節部分を備え、
前記関節部分と対向する前記被取付部材の面側には、前記振動方向変換部と前記被取付部材とを接合する接着部材の収容部が形成されていることを特徴とする請求項21に記載のスピーカ装置。 - 前記振動方向変換部は、前記ボイスコイルと前記振動板との間で角度変更自在に斜設される剛性のリンク部分と、該リンク部分の両端に形成される関節部分とを備え、
前記関節部分は、当該関節部分を跨いだ両側の部分で連続する屈折自在な連続部材で形成されていることを特徴とする請求項21に記載のスピーカ装置。 - 請求項21又は47に記載のスピーカ装置を備えることを特徴とする電子機器。
- 請求項21又は47に記載のスピーカ装置を備えることを特徴とする自動車。
- 請求項21又は47に記載のスピーカ装置を備えることを特徴とする建築物。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US13/146,809 US20120051557A1 (en) | 2009-02-26 | 2009-07-09 | Voice coil for speaker device, and speaker device |
CN2009801574852A CN102334346A (zh) | 2009-02-26 | 2009-07-09 | 扬声器装置用音圈及扬声器装置 |
JP2011501454A JP5341980B2 (ja) | 2009-02-26 | 2009-07-09 | スピーカ装置用ボイスコイル、スピーカ装置 |
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PCT/JP2009/053592 WO2010097930A1 (ja) | 2009-02-26 | 2009-02-26 | スピーカ装置用ボイスコイル、スピーカ装置 |
JPPCT/JP2009/053592 | 2009-02-26 |
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PCT/JP2009/053592 WO2010097930A1 (ja) | 2009-02-26 | 2009-02-26 | スピーカ装置用ボイスコイル、スピーカ装置 |
PCT/JP2009/062477 WO2010097974A1 (ja) | 2009-02-26 | 2009-07-09 | スピーカ装置用ボイスコイル、スピーカ装置 |
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JP2011114857A (ja) * | 2009-11-26 | 2011-06-09 | Onkyo Sound & Vision Corp | ボイスコイルおよびこれを用いた動電型スピーカー |
WO2012042675A1 (ja) * | 2010-10-01 | 2012-04-05 | パイオニア株式会社 | スピーカ装置 |
JP2021184530A (ja) * | 2020-05-21 | 2021-12-02 | アルプスアルパイン株式会社 | スピーカ |
JP7428317B2 (ja) | 2020-06-09 | 2024-02-06 | 日清紡マイクロデバイス株式会社 | Mems素子 |
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CN102132585A (zh) * | 2009-07-09 | 2011-07-20 | 日本先锋公司 | 扬声器装置 |
WO2011004478A1 (ja) * | 2009-07-09 | 2011-01-13 | パイオニア株式会社 | スピーカ装置 |
CN102113347A (zh) * | 2009-07-29 | 2011-06-29 | 日本先锋公司 | 扬声器装置 |
WO2011046030A1 (ja) * | 2009-10-15 | 2011-04-21 | パイオニア株式会社 | スピーカ装置 |
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JP6442854B2 (ja) * | 2014-04-09 | 2018-12-26 | ヤマハ株式会社 | 加振器の取付構造、及び、楽器 |
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TWI804679B (zh) * | 2019-09-11 | 2023-06-11 | 日商樂聲股份有限公司 | 揚聲器單元及揚聲器 |
CN113473327B (zh) * | 2020-03-31 | 2024-09-03 | 歌尔股份有限公司 | 扬声器和电子设备 |
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Also Published As
Publication number | Publication date |
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WO2010097930A1 (ja) | 2010-09-02 |
CN102334346A (zh) | 2012-01-25 |
US20120051557A1 (en) | 2012-03-01 |
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