WO2009095984A1 - スピーカ装置 - Google Patents
スピーカ装置 Download PDFInfo
- Publication number
- WO2009095984A1 WO2009095984A1 PCT/JP2008/051197 JP2008051197W WO2009095984A1 WO 2009095984 A1 WO2009095984 A1 WO 2009095984A1 JP 2008051197 W JP2008051197 W JP 2008051197W WO 2009095984 A1 WO2009095984 A1 WO 2009095984A1
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- WO
- WIPO (PCT)
- Prior art keywords
- diaphragm
- speaker device
- angle conversion
- conversion transmission
- driving
- Prior art date
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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
- H04R9/10—Telephone receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
Definitions
- the present invention relates to a speaker device.
- a dynamic speaker device is known as a general speaker device (see, for example, Patent Document 1).
- the dynamic speaker device described in Patent Document 1 includes a frame 3J, a cone-shaped diaphragm 21J, an edge 4J that supports the diaphragm 21J on the frame 3J, and a diaphragm 21J.
- the voice coil bobbin 610J vibrates due to the Lorentz force generated in the voice coil 611J, and the vibration is transmitted to the diaphragm 21J to vibrate the diaphragm 21J.
- JP-A-8-149596 FIG. 1
- the general dynamic speaker device includes a voice coil 611J disposed on the opposite side to the acoustic radiation side of the diaphragm 21J, and vibration directions of the voice coil 611J and the voice coil bobbin 610J. They are configured so that the vibration direction of the diaphragm 21J is parallel.
- a voice coil 611J disposed on the opposite side to the acoustic radiation side of the diaphragm 21J
- vibration directions of the voice coil 611J and the voice coil bobbin 610J are configured so that the vibration direction of the diaphragm 21J is parallel.
- an area for vibrating the diaphragm 21J, an area for vibrating the voice coil bobbin 610J, an area where a magnetic circuit is disposed, and the like are required.
- the size along the (radiation direction) is relatively large. Specifically, for example, as shown in FIG.
- 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 of the diaphragm 21J.
- the size (d) along the vibration direction from the lower end of the voice coil 611J to the yoke 51J of the magnetic circuit needs to be set large, and the vibration direction (acoustic radiation direction) of the diaphragm 21J is required.
- the size along is relatively large.
- the vibration direction of the voice coil bobbin 610J and the vibration direction of the diaphragm 21J are formed so as to be substantially parallel to each other, so that it is relatively difficult to achieve both reduction in thickness and increase in volume. It is.
- the voice coil bobbin 610J is joined to the inner peripheral part of the cone-shaped diaphragm 21J, and the driving force is transmitted from the voice coil bobbin 610J to the inner peripheral part 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 As a thin speaker device, for example, a capacitor type speaker device is known.
- 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 capacitor type speaker device when a relatively large amplitude audio signal is input, 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, it is possible to provide a thin speaker device that can emit a large volume of reproduced sound with a relatively simple structure, and a thin speaker device that can emit a high-quality reproduced sound with a relatively simple structure. It is an object of the present invention to provide a thin speaker device in which the diaphragm vibrates in substantially the same phase with a relatively simple configuration.
- a speaker device includes a diaphragm, a frame that supports the diaphragm so as to freely vibrate along a vibration direction, a magnetic circuit provided on the frame, and a drive member that drives the diaphragm.
- the drive member includes a voice coil that is movably disposed in the magnetic gap of the magnetic circuit, and a drive unit that is formed to be movable along different directions with respect to the vibration direction of the diaphragm; One end part is joined to the drive part so that the angle can be changed, and the other end part is joined to the diaphragm so that the angle can be changed.
- the vibration part of the diaphragm and the moving direction of the drive part are inclined. And an angle conversion transmission unit having rigidity.
- FIG. 1 It is a figure for demonstrating the speaker apparatus based on a prior art. It is a figure for demonstrating the speaker apparatus 1 which concerns on 1st Embodiment of this invention, (A) is a front view of the speaker apparatus 1 which concerns on 1st Embodiment of this invention, (B) is (A). It is sectional drawing along the AA line of the speaker apparatus 1 shown in FIG. It is the perspective view which expanded the magnetic circuit 5 vicinity of the speaker apparatus 1 shown to FIG. 2 (A) and 1 (B). It is a disassembled perspective view of the magnetic circuit 5 of the speaker apparatus 1 shown in FIG. It is sectional drawing of the magnetic circuit 5 of the speaker apparatus 1 shown in FIG.
- FIG. 4D is a cross-sectional view of the speaker device 1 in a state of being displaced in the opposite direction
- FIG. 4D is a diagram for explaining operations of the diaphragm 21 and the drive member 26 of the speaker device 1.
- FIG. 1 is sectional drawing of the speaker apparatus of a state in which a diaphragm is 0 displacement with respect to a reference position
- (B) is a cross-sectional view of the speaker device 1A in a state where the diaphragm is displaced toward the acoustic radiation side with respect to the reference position
- (C) is opposite to the acoustic radiation side with respect to the reference position of the diaphragm. It is sectional drawing of the speaker apparatus 1A of the state displaced to the direction.
- FIG. 1B It is a figure for demonstrating the speaker apparatus 1B which concerns on 3rd Embodiment of this invention, and specifically (A) is sectional drawing of the speaker apparatus 1B in the state where a diaphragm is 0 displacement with respect to a reference position. (B) is a cross-sectional view of the speaker device 1B in a state where the diaphragm is displaced toward the acoustic radiation side with respect to the reference position, and (C) is relative to the acoustic radiation side with respect to the reference position of the diaphragm. It is sectional drawing of the speaker apparatus 1B of the state displaced to the opposite direction. It is a perspective view of the speaker apparatus 1C which concerns on 4th Embodiment of this invention. FIG.
- FIG. 10 is a cross-sectional perspective view of the speaker device 1 ⁇ / b> C shown in FIG. 9. It is a top view of the principal part of the speaker apparatus 1C shown in FIG. It is a top view of the principal part of the speaker apparatus 1C shown in FIG. (A) is a figure for demonstrating the speaker apparatus which concerns on a 1st modification, (B) is a figure for demonstrating the speaker apparatus which concerns on a 2nd modification, (C) is a 3rd modification. It is a figure for demonstrating the speaker apparatus which concerns on. (A) is sectional drawing of the speaker apparatus 1E which concerns on other embodiment of this invention, (B) is sectional drawing of the speaker apparatus 1F which concerns on other embodiment of this invention, (C) is this invention.
- a speaker device includes a diaphragm, a frame that supports the diaphragm so as to freely vibrate along a vibration direction, a magnetic circuit provided in the frame, and a drive member that drives the diaphragm.
- the drive member includes a voice coil that is movably disposed in the magnetic gap of the magnetic circuit, and is configured to be movable along a direction different from the vibration direction of the diaphragm, and one end The angle of the rigidity is inclined with respect to the vibration direction of the diaphragm and the moving direction of the drive part, with the other part joined to the drive part and the other end part joined to the diaphragm.
- a conversion transmission unit includes a conversion transmission unit.
- one end of the angle conversion transmission unit is joined to the drive unit so that it can be bent or bent, and the other end is joined to the diaphragm so that it can be bent or bent.
- the angle conversion transmission unit is driven by one end portion where the bent portion is formed vibrates along the moving direction of the drive unit and the other end portion vibrates along the vibration direction of the diaphragm.
- the direction of the driving force along the moving direction by the unit is converted into a direction along the vibration direction of the diaphragm, and the driving force is transmitted from the driving unit to the diaphragm.
- the drive unit is formed to be movable along a direction orthogonal to the vibration direction of the diaphragm.
- the drive unit when an audio signal is input to the voice coil, a Lorentz force is generated in the voice coil disposed in the magnetic gap of the magnetic circuit, and the drive unit is different from the vibration direction of the diaphragm. It vibrates along a direction, preferably a direction orthogonal to the vibration direction of the diaphragm.
- the angle conversion transmission unit is driven by converting the direction of the driving force by causing the one end portion to vibrate along the moving direction of the driving portion and the other end vibrating along the vibration direction of the diaphragm. Force is transmitted from the drive to the diaphragm.
- the diaphragm vibrates along the vibration direction by the driving force transmitted from the angle conversion transmission unit.
- a voice coil bobbin is disposed on the back side of the diaphragm, and the vibration direction of the diaphragm and the vibration direction of the voice coil bobbin are configured to be substantially parallel to each other. Since the diaphragm and the voice coil bobbin require a region for vibration, the size of the speaker device along the acoustic radiation direction is relatively large.
- a drive unit arranged movably in a direction different from the vibration direction of the diaphragm, preferably in a direction orthogonal to the vibration direction of the diaphragm, and the diaphragm Since the angle conversion transmission unit is provided obliquely with respect to the vibration direction and the moving direction of the drive unit, the size along the acoustic radiation direction is relatively small as compared with the general speaker device. That is, a thin speaker device can be provided.
- the driving force generated in the voice coil of the driving unit is angle-converted via the angle conversion transmission unit having the above-described configuration to the diaphragm. Since it is transmitted, it is possible to radiate a reproduced sound having a relatively large volume and a relatively high sound quality.
- a speaker device that transmits a driving force using the bending of a flexible member is resonant with the flexible member (especially at a low frequency). ) Is likely to occur.
- the speaker device according to the present invention transmits the driving force from the driving unit to the diaphragm by the rigid angle conversion member. Therefore, for example, there is no decrease in response due to distortion of the flexible member, and the diaphragm can be vibrated with relatively high sensitivity.
- the speaker device according to the present invention can be employed in various devices such as a mobile phone, a vehicle-mounted speaker, a personal computer speaker, and a television broadcast receiver speaker.
- a speaker device according to an embodiment of the present invention will be described with reference to the drawings.
- FIG. 2 is a diagram for explaining the speaker device 1 according to the first embodiment of the present invention.
- FIG. 2 (A) is a front view of the speaker device 1 according to the first embodiment of the present invention (the diaphragm is not shown), and FIG. 2 (B) is shown in FIG. 2 (A).
- 2 is a cross-sectional view of the speaker device 1 along the line AA.
- FIG. FIG. 3 is an enlarged perspective view of the vicinity of the magnetic circuit 5 of the speaker device 1 shown in FIGS. 2 (A) and 1 (B).
- 4 is an exploded perspective view of the magnetic circuit 5 of the speaker device 1 shown in FIG.
- FIG. 5 is a cross-sectional view of the magnetic circuit 5 of the speaker device 1 shown in FIG.
- the sound radiation direction (SD) by the diaphragm 21 of the speaker device 1 is defined as the Z-axis direction
- the longitudinal direction of the speaker device 1 (drive direction of the drive unit)
- the X-axis direction is defined as the X-axis direction
- the direction to do is defined as the Y axis.
- the diaphragm 1 is omitted.
- the speaker device 1 includes a vibrating body 2, a frame 3, an edge (support member) 4, a magnetic circuit 5, and a damper (regulator) 7. .
- the vibrating body 2 includes a diaphragm 21 and a driving member 26.
- the drive member 26 includes a drive unit 61 provided with a voice coil 611 and an angle conversion transmission unit 62.
- the diaphragm 21 corresponds to an embodiment of the diaphragm according to the present invention
- the drive member 26 corresponds to an embodiment of the drive member according to the present invention
- the frame 3 corresponds to an embodiment of the frame according to the present invention
- the magnetic circuit 5 corresponds to an embodiment of the magnetic circuit according to the present invention.
- the voice coil 611 corresponds to an embodiment of the voice coil according to the present invention.
- the drive unit 61 corresponds to an embodiment of the drive unit according to the present invention.
- the angle conversion transmission unit 62 corresponds to an embodiment of the angle conversion transmission unit according to the present invention.
- the bent portion 63 corresponds to an embodiment of the bent portion according to the present invention.
- the damper (restriction part) 7 corresponds to an embodiment of the restriction part according to the present invention.
- the speaker device 1 includes a voice coil 611 and is formed to be movable along a direction different from the vibration direction of the diaphragm 21, specifically, a direction orthogonal to the vibration direction of the diaphragm 21.
- One end of the drive unit 61 is joined to the drive unit 61 so as to be bent, and the other end is joined to the diaphragm 21 so as to be bent.
- the vibration direction of the diaphragm 21 and the movement of the drive unit 61 A rigid angle conversion transmission unit 62 is provided obliquely with respect to each direction.
- the speaker device 1 has a drive member (cantilever) 26 that can be bent by a movable joint (bending portion), and the front end portion of the drive member 26 is joined to the diaphragm 21 so as to be bent. Then, the driving force along the prescribed direction by the voice coil 611 is converted into a direction different from the prescribed direction and transmitted to the diaphragm 21, and the diaphragm 21 vibrates in the acoustic radiation direction (SD).
- SD acoustic radiation direction
- the vibrating body 2 is supported by the frame 3 so as to freely vibrate, and has a diaphragm 21 and a driving member 26 in the present embodiment.
- the diaphragm 21 is supported by the frame 4 so as to vibrate along the vibration direction (Z-axis direction).
- the diaphragm 21 emits sound waves in the acoustic radiation direction (SD) when the speaker is driven.
- the diaphragm 21 according to the present embodiment is supported by the frame 3 through the edge 4, and movement along the direction other than the vibration direction, specifically, along the X-axis direction and the Y-axis direction is restricted by the edge 4. ing.
- the edge 4 and the diaphragm 21 may be integrally formed.
- the diaphragm 21 As a material for forming the diaphragm 21, for example, a resin material, a metal material, a paper material, a ceramic material, a composite material, or the like can be employed.
- the diaphragm 21 preferably has rigidity, for example.
- the diaphragm 21 is formed in a defined shape such as a flat plate shape, a dome shape, or a cone shape.
- the diaphragm 21 according to the present embodiment is formed in a flat plate shape.
- the diaphragm 21 is formed in a defined shape such as a rectangular shape, an elliptical shape, a circular shape, or a polygonal shape (planar shape) viewed from the acoustic radiation direction (SD).
- the diaphragm 21 has a rectangular planar shape.
- the diaphragm 21 is supported by the frame 4 so as to freely vibrate, and seals a space surrounded by the diaphragm 21 and the frame 4 on the back side of the diaphragm 21 (opposite to the acoustic radiation direction).
- the sound wave emitted from the back side of the diaphragm 21 can be prevented from being emitted toward the acoustic radiation direction.
- the frame 3 supports the diaphragm 21 so as to freely vibrate along the vibration direction.
- the frame 3 When viewed from the sound radiation direction (SD), the frame 3 according to this embodiment has a rectangular planar shape and a concave cross-sectional shape.
- the frame 3 supports the diaphragm 21 at the upper end of the frame and accommodates the magnetic circuit 5.
- the frame 3 has a flat plate portion 31 having a rectangular planar shape and an acoustic radiation direction (SD) from the outer peripheral portion of the flat plate portion 31. It has a rectangular tubular portion 32 that extends, and an opening is formed at the top.
- the magnetic circuit 5 is disposed on the flat plate portion 31, the outer peripheral portion of the edge 4 is joined to the upper end portion of the cylindrical portion 32 by an adhesive or the like, and the diaphragm 21 supported by the edge 4 at the opening portion. Is arranged.
- an upper flat portion 321 extending inward is formed at the upper end portion of the cylindrical portion 32, and the edge 4 is joined to the upper flat portion 321.
- a material for forming the frame 3 for example, a known material such as resin or metal can be used.
- the frame 3 has holes 301 formed in, for example, a side surface or a bottom surface.
- the hole 301 functions as, for example, a vent hole.
- the hole portion 301 is provided, such a reduction in vibration of the diaphragm 21 can be suppressed.
- the hole 301 functions to radiate heat from the magnetic circuit 5 and the voice coil 611.
- the hole 301 passes through a conductive wire that electrically connects the voice coil 611 and an audio processing device 80 such as an amplifier, an equalizer, a tuner, a broadcast receiver, and a television provided outside the speaker device, for example. It may be used as a hole.
- the terminal portion 81 may be provided on the frame 3. At this time, the audio processing circuit 80 and the terminal portion 81 are electrically connected by the conductive wire 82, and the terminal portion 81 and the voice coil 611 are electrically connected by the conductive wire 86.
- the sound processing device 80 is not limited to the above form, and for example, a sound processing device may be provided inside the speaker device 1.
- the edge 4 is disposed between the diaphragm 21 and the frame 4, and the inner peripheral portion supports the outer peripheral portion of the diaphragm 21 and the outer peripheral portion is joined to the frame, thereby holding the diaphragm 21 in a predetermined position. . Specifically, the edge 4 supports the diaphragm 21 so as to vibrate along the vibration direction (Z-axis direction) and brakes in a direction orthogonal to the vibration direction.
- the edge 4 according to the present embodiment is formed in a ring shape when viewed from the acoustic radiation direction. As shown in FIG.
- the edge 4 has a cross-sectional shape that is a prescribed shape, such as a convex shape, a concave shape, or a corrugated shape.
- the edge 4 is formed in a concave shape in the acoustic direction.
- the edge 4 can employ, for example, leather, cloth, rubber, resin, those obtained by applying seal processing thereto, a member formed of rubber, resin, or the like into a prescribed shape.
- the magnetic circuit 5 is disposed on the frame 3. As shown in FIGS. 2A and 2B, the magnetic circuit 5 according to the present embodiment is accommodated in the frame 3, specifically, provided on the flat plate portion 31 of the frame 3. Further, the magnetic circuit 5 according to the present embodiment is disposed on the side opposite to the acoustic radiation direction of the diaphragm 21 as shown in FIG. 2B, for example.
- the magnetic circuit 5 for example, an inner magnet type magnetic circuit, an outer magnet type magnetic circuit, or the like can be adopted.
- the magnetic circuit 5 has a yoke 51 and a magnet 52 as shown in FIGS.
- the magnetic circuit 5 according to this embodiment includes a plurality of magnets 521 to 524.
- magnets 52 are provided on both sides of the magnetic gap 59 along the direction of the magnetic field.
- the magnetic gap 59 is formed in a groove shape so that the voice coil 611 can move within a specified range along a predetermined direction.
- the yoke 51 has a lower flat portion 511, an upper flat portion 512, and a support column 513.
- the lower flat part 511 and the upper flat part 512 are arranged substantially parallel to each other with a specified interval, and a column part 513 is substantially at the center with respect to the lower flat part 511 and the upper flat part 512. It is formed so as to extend in the orthogonal direction.
- the speaker device 1 When an audio signal (current) flows through a conductive wire (voice coil) in a magnetic field, Lorentz force is generated along the direction perpendicular to the direction of the magnetic field and the direction of current according to the Fleming left-hand rule.
- the speaker device 1 is along a specified direction different from the vibration direction of the diaphragm 21, specifically, a direction orthogonal to the vibration direction (Z-axis direction) of the diaphragm 21 (for example, the X-axis direction).
- the voice coil 611 and the magnetic circuit 5 are configured such that a Lorentz force is generated in the voice coil 611 and the voice coil 611 vibrates along the X-axis direction.
- Magnets 521 to 524 are arranged on the flat portions 511 and 512.
- the ring-shaped voice coil 611 has a substantially rectangular planar shape when viewed from the acoustic radiation direction (SD), and linear portions 611A and 611C formed along the Y-axis direction. And linear portions 611B and 611D formed along the X-axis direction.
- the straight portions 611A and 611C of the voice coil 611 are disposed in the magnetic gap 59 of the magnetic circuit 5, 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 611B and 611D of the voice coil 611.
- the voice coil 611 according to the present embodiment is formed in a thin flat plate shape, and a portion in the magnetic gap can be made relatively large by relatively increasing the number of turns. A relatively large driving force can be obtained.
- the direction of the magnetic field is formed along the Z-axis direction as shown in FIG.
- the plurality of magnets 521 to 524 are arranged such that the direction of the magnetic field applied to the straight part 611A of the voice coil 611 is opposite to the direction of the magnetic field related to the straight part 611C. Magnetized.
- the voice coil 611 is configured so that a voice signal flows in the opposite direction to each of the straight portion 611A and the straight portion 611C.
- the Lorentz force generated in the straight portion 611A and the Lorentz force generated in the straight portion 611C are in the same direction. Compared with a configuration in which a magnetic field is applied only to one side, the driving force is doubled. For this reason, the magnetic circuit 5 and the voice coil 611 configured as described above can be configured to be relatively thin, and a relatively large driving force can be obtained.
- the drive member 26 includes the voice coil 611 described above, and drives the diaphragm 21. Specifically, when an audio signal is input, the driving member 26 transmits a driving force (Lorentz force) generated in the voice coil 611 to the diaphragm 21 to vibrate the diaphragm 21.
- the drive member 26 includes a drive unit 61 with a voice coil, an angle conversion transmission unit (transmission unit) 62, a folding unit 63, and a folding unit 64.
- the drive unit 61 includes a voice coil 611 that is movably disposed in the magnetic gap 59 of the magnetic circuit 5, and is configured to be movable along different directions with respect to the vibration direction of the diaphragm 21.
- the drive unit 61 according to the present embodiment is formed to be movable only along the X-axis direction, and movement is restricted in other directions.
- the damper 7 is provided as a restricting portion in the present embodiment for restricting the movement range of the drive portion 61, the present invention is not limited to this form.
- the damper 7 may be a restricting portion such as a groove having an edge shape.
- the drive unit 61 includes a voice coil 611 disposed in the magnetic gap 59 of the magnetic circuit 5 and an insulating member 612 having a shape extending from the voice coil to the outside of the magnetic gap along the moving direction.
- the angle conversion transmission part 62 is joined to the end part along the moving direction of the insulating member via a bent part 63.
- the drive unit 61 has an opening 615, and a voice coil 611 is provided on the inner periphery of the opening 615. Since the drive unit 61 having the above configuration has a structure in which the voice coil 611 is inserted into the insulating member 612, the strength of the voice coil 611 can be reinforced and distortion of the voice coil 611 can be reduced.
- the opening 615 according to this embodiment is loosely fitted to the support column 513 of the magnetic circuit 5, and the movement range of the drive unit 61 is restricted in this state.
- the opening 615 is formed in a rectangular shape, and the distance between both sides along the moving direction of the drive unit 61 is formed to be approximately the same as or larger than the width of the support column 513.
- the interval between both sides in the direction orthogonal to the direction is formed to be relatively large corresponding to the movement range of the drive unit 61. Since the drive unit 61 having the above configuration has a configuration in which the opening 615 is loosely fitted to the support column 513 of the magnetic circuit 5, the installation space of the magnetic circuit 5 and the drive unit 61 can be made relatively small.
- the angle conversion transmission unit 62 is disposed between the driving unit 61 and the diaphragm 21 and transmits a driving force from the driving unit 61 to the diaphragm 21. Specifically, one end of the angle conversion transmission unit 62 is joined to the drive unit 61 so that the angle can be changed, and the other end is joined to the diaphragm 21 so that the angle can be changed. More specifically, one end of the angle conversion transmission unit 62 is joined to the drive unit 61 so as to be bent or bent, and the other end is joined to the diaphragm 21 so as to be bent or bent. .
- the lower end of the angle conversion transmission unit 62 is joined to the end of the drive unit 61 via, for example, a bending unit 63 so as to be bent, and the horizontal direction (X-axis direction, drive unit 61).
- the movement in the other direction, for example, the Z-axis direction and the Y-axis direction is restricted.
- the upper end portion of the angle conversion transmission unit 62 is joined to the diaphragm 21 via the bending portion 64 so as to be freely bent, and moves only along the acoustic radiation direction (Z-axis direction).
- the movement in other directions, for example, the Y-axis direction and the X-axis direction is restricted.
- the upper end of the angle conversion transmission unit 62 is joined to the back side of the center of gravity of the angle conversion transmission unit 62 so as to be bent.
- the angle conversion transmission unit 62 is provided obliquely with respect to each of the vibration direction (Z-axis direction) of the diaphragm 21 and the movement direction (X-axis direction) of the drive unit 61.
- the angle conversion transmission part 62 is formed, for example with the rigid material, and has rigidity. That is, there is almost no flexibility.
- the angle conversion transmission unit 62 according to the present embodiment is formed in a plate shape, but is not limited to this form and may be formed in a bar shape.
- the angle conversion transmission unit 62 only needs to have rigidity in a shape such that the distance between the joint portion with the drive portion 61 and the joint portion with the diaphragm 21 is constant even when the speaker is driven. .
- the cross-sectional shape of the angle conversion transmission unit 62 may be a prescribed shape such as a wave shape.
- the angle conversion transmission unit 62 has rigidity, the driving force can be transmitted from the driving unit 61 to the diaphragm 21 without being bent or expanded or contracted when the speaker is driven.
- the angle conversion transmission part 62 has rigidity, it is hard to generate
- the air hole 620 is formed in the angle conversion transmission unit 62 according to the present embodiment.
- the ventilation hole 620 suppresses braking of the angle conversion transmission unit 62 due to air by reducing local fluctuations in air pressure in the space surrounded by the diaphragm 21 and the frame 3 during speaker vibration. In addition, the deterioration of sound quality is suppressed. Specifically, it is formed between the air pressure in the space surrounded by the diaphragm 21, the angle conversion transmission unit 62 and the drive unit 61, and the angle conversion transmission unit joined to and opposed to the different drive units 61. It is possible to prevent the air pressure in the space from being greatly different.
- the bending part 63 is formed between the drive part 61 and the angle conversion transmission part 62, for example, and joins the drive part 61 and the angle conversion transmission part 62 so that bending is possible.
- the bent portion 63 may be formed of a mechanically structured joint, a member formed of a fiber made of a polymer such as polyester or polyaramid, a member formed of polyurethane resin, rubber, or the like. In addition, it may be configured by a flexible member such as a flexible film.
- the drive unit 61 and the angle conversion transmission unit 62 may be integrally formed of a specified material such as a resin material, and the bent portion 63 may be formed by performing processing so that it can be bent at a predetermined location.
- the bending part 64 is formed between the angle conversion transmission part 62 and the diaphragm 21, and joins the angle conversion transmission part 62 and the diaphragm 21 so that bending is possible.
- the bent portion 64 may be constituted by a joint (joint) having a mechanical structure, or may be constituted by a flexible member such as a flexible film. Further, a bent portion 64 is formed in the vicinity of the end portion of the angle conversion transmission portion 62, and the end portion of the angle conversion transmission portion 62 is formed in a structure that fits into a groove portion or a hole portion formed in the diaphragm 21. Alternatively, the angle conversion transmission unit 62 and the diaphragm 21 may be joined so as to be bent.
- the drive member 26 and the diaphragm 21 are separate members, but the present invention is not limited to this form.
- the drive member 26 and the diaphragm 21 may be integrally formed.
- the drive part 61 and the angle conversion transmission part 62 may be integrally formed, and the angle conversion transmission part 62 and the diaphragm 21 may be integrally formed.
- the vibration plate 21 and the angle conversion transmission unit 62 may be integrally formed of a specified material such as a resin material, and the bending portion may be formed by performing processing so that the predetermined portion can be bent.
- the one end of the angle conversion transmission unit may be joined to the drive unit 61 so that the angle can be changed, and the other end may be joined to the diaphragm 21 so that the angle can be changed.
- the bending portion that allows the joint portion between the driving portion 61 and the angle conversion transmission portion 62 to be bent and the bending portion that allows the joint portion between the diaphragm 21 and the angle conversion transmission portion 62 to be bent, Alternatively, it may be a bent portion that allows the joint portion between the driving portion 61 and the angle conversion transmission portion 62 and the joint portion between the diaphragm 21 and the angle conversion transmission portion 62 to be freely bent, and is not particularly limited.
- the restricting unit (damper) 7 holds the driving unit 61 at a predetermined position in the magnetic gap 59 of the magnetic circuit 5 so that the driving unit 61 does not contact the magnetic circuit 5, and holds the driving unit 61 in the driving direction (X-axis). In the direction).
- the restricting portion 7 restricts the movement of the driving portion 61 in a direction different from the driving direction of the driving portion 61, for example, in the Z-axis direction or the Y-axis direction.
- the restricting portion 7 according to this embodiment is formed in, for example, a plate shape and has flexibility.
- the restricting portion 7 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.
- one end of the restricting portion 7 is joined to the drive portion 61 and the other end is joined to the frame 3.
- the restricting portion 7 is not limited to this form, and for example, one end portion may be joined to the driving portion 61 and the other end portion may be joined to the magnetic circuit 5.
- the speaker device 1 may have a structure in which the drive unit 61 slides in a state where the end of the drive unit 61 is fitted to a rail, a groove, a stepped portion, or the like.
- FIG. 6 is a diagram for explaining the operation of the speaker device 1 according to the first embodiment of the present invention.
- FIG. 6A is a cross-sectional view of the speaker device 1 with the diaphragm 21 positioned at the reference position.
- FIG. 6B is a cross-sectional view of the speaker device 1 in a state where the diaphragm 21 is displaced toward the acoustic radiation side with respect to the reference position.
- FIG. 6C is a cross-sectional view of the speaker device 1 in a state where the diaphragm 21 is displaced in the opposite direction with respect to the acoustic radiation side with respect to the reference position.
- FIG. 6D is a diagram for explaining the operation of the diaphragm 21 and the drive member 26 of the speaker device 1.
- each of the driving unit 61, the angle conversion transmission unit 62, and the diaphragm 21 is disposed at the reference position.
- the angle ⁇ 1 formed by the drive unit 61 and the angle conversion transmission unit 62 is a predetermined angle (about 150 degrees)
- the angle ⁇ 2 formed by the diaphragm 21 and the angle conversion transmission unit 62 is a predetermined angle (about 30 degrees).
- the angle conversion transmission unit 62 is inclined with respect to the drive unit 61 and the diaphragm 21.
- the angles ⁇ 1 and ⁇ 2 are not limited to the above forms.
- the angles ⁇ 1 and ⁇ 2 are preferably other than 0 degrees and 90 degrees.
- the angle conversion transmission unit 62 has a lower end portion that vibrates along the moving direction (X-axis direction) of the drive unit 61, and an upper end portion that vibrates along the vibration direction (Z-axis direction) of the diaphragm 21,
- the direction of the driving force along the moving direction of the voice coil 611 is converted into a direction along the vibration direction of the diaphragm 21, and the driving force is transmitted from the driving unit 61 to the diaphragm 21.
- the diaphragm 21 receives a driving force from the angle conversion transmission unit 62 and vibrates along the Z-axis direction.
- the amount of movement of the drive unit 61 along the X-axis direction is in a relationship of changing with respect to the amount of movement of the diaphragm 21 along the Z-axis direction.
- This relationship is defined by the positional relationship of each of the drive unit 61, the diaphragm 21, and the angle conversion transmission unit 62, the relative angle, the length of the angle conversion transmission unit 62, etc., so that the desired acoustic characteristics are obtained.
- the angle conversion transmission unit 62 is formed to a specified length, and the angle conversion transmission unit 62 with respect to the movement directions of the drive unit 61 and the diaphragm 21. Is obliquely set at a specified angle.
- the speaker device 1 includes the diaphragm 21, the frame 3 that supports the diaphragm 21 so as to freely vibrate along the vibration direction, the magnetic circuit 5 provided in the frame 3, and the diaphragm 21. And a driving member 26 to be driven.
- the drive member 26 includes a voice coil 611 that is movably disposed in the magnetic gap 59 of the magnetic circuit, and a drive unit 61 that is movable along a direction different from the vibration direction of the diaphragm 21.
- the angle conversion transmission unit 62 has one end portion joined to the drive portion 61 so as to be bent and the other end portion joined to the diaphragm 21 so as to be bent.
- the angle conversion transmission unit 62 has rigidity and is inclined with respect to the vibration direction of the diaphragm 21 and the moving direction of the drive unit. That is, the speaker device 1 includes a driving unit 61 that is movably arranged in a direction different from the vibration direction of the diaphragm 21, preferably in a direction orthogonal to the vibration direction of the diaphragm, and the diaphragm 21. Since it has the angle conversion transmission part 62 provided diagonally with respect to each of the vibration direction and the moving direction of the drive part 61, compared with a general speaker apparatus, the size along the acoustic radiation direction (the overall height of the speaker apparatus) ) Is relatively small. That is, a thin speaker device can be provided.
- the speaker device according to the present invention when transmitting the driving force from the voice coil to the diaphragm, the speaker device according to the present invention is more rigid than the speaker device using the bending force of the flexible member. Since the driving force is transmitted from the drive unit to the diaphragm by the angle conversion member, for example, there is no decrease in response due to distortion of the flexible member, and the diaphragm can be vibrated with relatively high sensitivity. Further, resonance (particularly at a low frequency) hardly occurs in the flexible member, and the driving force of the driving unit can be efficiently transmitted to the diaphragm.
- the driving force generated in the voice coil of the driving unit is angle-converted via the angle conversion transmission unit having the above-described configuration to the diaphragm. Since it is transmitted, it is possible to radiate a reproduced sound having a relatively large volume and a relatively high sound quality.
- the speaker device 1 since the speaker device 1 includes the flat plate-shaped drive unit 61 and the angle conversion transmission unit 62 configured as described above, the speaker device 1 can be formed relatively thin.
- the voice coil 611 is formed in a thin flat plate shape, and a relatively large portion of the magnetic gap can be made relatively large by increasing the number of turns. You can gain power.
- FIG. 7 is a diagram for explaining a speaker device 1A according to a second embodiment of the present invention.
- FIG. 7A is a cross-sectional view of the speaker device in a state in which the diaphragm is zero displacement with respect to the reference position.
- FIG. 7B is a cross-sectional view of the speaker device 1A in a state where the diaphragm is displaced toward the acoustic radiation side with respect to the reference position.
- FIG. 7C is a cross-sectional view of the speaker device 1A in a state of being displaced in the opposite direction with respect to the acoustic radiation side with respect to the reference position of the diaphragm.
- description of the same configuration as that of the first embodiment will be omitted.
- the speaker device 1A includes a plurality of magnetic circuits and driving members, specifically two magnetic circuits 5A and 5B, and two driving members 26A and 26B.
- the driving member 26A includes a driving unit 61A in which a voice coil is formed, an angle conversion transmission unit 62A, a bending unit 63A, and a bending unit 64A.
- the driving member 26B, a driving unit 61B in which a voice coil is formed, and an angle conversion It has the transmission part 62B, the bending part 63B, and the bending part 64B.
- the two magnetic circuits 5A and 5B are formed such that the driving unit 61A and the driving unit 61B move along the X-axis direction, and the driving directions of the driving units 61A and 61B are opposite to each other. It is configured.
- the upper end portions of the angle conversion transmission portions 62A and 62B are supported so as to be bent at a predetermined interval from the center portion (center of gravity position) of the diaphragm 21.
- the edge 4A according to the present embodiment is formed in a convex shape toward the acoustic radiation direction.
- FIG. 1A In the speaker device 1A having the above configuration, for example, when the same audio signal is input from the audio processing device 80 to the voice coils of the drive units 61A and 61B via the terminal units 81A and 81B, FIG. As shown in (C), Lorentz force (driving force) is generated in opposite directions along the X-axis direction.
- the drive units 61A and 61B vibrate in opposite directions along the X-axis direction.
- the driving force is transmitted to the diaphragm 21 via the angle conversion transmission units 62A and 62B, and the diaphragm 21 vibrates along the Z-axis direction.
- FIGS. 7 (A) to 7 (C) the operation of the speaker device 1A having the above configuration will be described with reference to FIGS. 7 (A) to 7 (C).
- the signals shown in FIGS. 7A to 7C are displayed.
- Lorentz forces driving forces
- the drive units 61A and 61B vibrate in opposite directions along the X-axis direction.
- the driving force is transmitted to the diaphragm 21 via the angle conversion transmission units 62A and 62B, and the diaphragm 21 vibrates along the Z-axis direction.
- the drive units 61A and 61B vibrate in opposite directions along the X-axis direction, so that unnecessary vibrations can be canceled out. That is, compared with 1st Embodiment, 1 A of speaker apparatuses which concern on this embodiment can radiate
- the conversion transmission parts 62A and 62B are separated from each other by a predetermined distance and are joined to the diaphragm 21 so as to be foldable, so that the driving force is transmitted to the diaphragm 21.
- the occurrence of deflection can be suppressed.
- the entire diaphragm 21 can be vibrated at substantially the same phase.
- FIG. 8 is a diagram for explaining a speaker device 1B according to a third embodiment of the present invention.
- FIG. 8A is a cross-sectional view of the speaker device 1B in a state where the diaphragm is in a displacement 0 with respect to the reference position.
- FIG. 8B is a cross-sectional view of the speaker device 1B in a state where the diaphragm is displaced toward the acoustic radiation side with respect to the reference position.
- FIG. 8C is a cross-sectional view of the speaker device 1B in a state of being displaced in a direction opposite to the acoustic radiation side with respect to the reference position of the diaphragm.
- descriptions of the same configurations as those of the first and second embodiments are omitted.
- the angle conversion transmission units 62A and 62B are joined to the central portion (center of gravity position) of the diaphragm 21 so as to be bent.
- the magnetic circuits 5A and 5B are arranged so that the distance between them is short.
- the angle conversion transmission units 62A and 62B are arranged so that the distance between them is also shorter than in the second embodiment.
- the diaphragm 21 preferably has a relatively high rigidity.
- the occurrence of local bending of the diaphragm 21 can be suppressed, and the size along the X-axis direction can be reduced as compared with the second embodiment. That is, a thin and small speaker device can be provided.
- FIG. 9 is a perspective view of a speaker device 1C according to the fourth embodiment of the present invention.
- 10 is a cross-sectional perspective view of the speaker device 1C shown in FIG. 11 is a top view of the main part of the speaker device 1C shown in FIG.
- FIG. 12 is a top view of the main part of the speaker device 1C shown in FIG.
- the description of the same configuration as in the first to third embodiments is omitted.
- the diaphragm is omitted.
- a part of the magnetic circuit 5D on the right side in the drawing is omitted.
- the speaker device 1C includes a diaphragm 21C (21), a frame 3C, an edge (support member) 4C, magnetic circuits 5C and 5D, and drive units 61C and 61D (61. ), Angle conversion transmission units 62C and 62D, and a damper (regulation unit) 7.
- the driving unit 61C has angle conversion units 621C and 622C joined to the both ends along the driving direction via bent portions 631 and 632 (63), respectively, and the driving unit 61D includes both ends along the driving direction.
- Angle conversion units 621D and 622D are formed through bent portions 631 and 632 (63), respectively.
- the angle conversion parts 621C and 621D are joined to the central part (center of gravity position) of the diaphragm 21 via a bending part 641 (64) so as to be bent.
- the angle conversion portions 622C and 622D are joined to each other via a bent portion at a position closer to the outer peripheral portion than the center portion (center of gravity position) of the diaphragm 21.
- the angle conversion portions 621C, 622C, 621D, and 622D have a bent end portion 65 formed in the vicinity of the end portion, and the groove portion 214 ( 214A to 214C). Further, for example, the bent end portion 65 is fixed in a state of protruding from the front side surface of the diaphragm 21C.
- the diaphragm 21C has a relatively large strength because the protruding portion 215 is formed, can suppress the occurrence of deflection of the diaphragm, and vibrates the entire diaphragm 21C in substantially the same phase. Can do.
- angle conversion units 621C and 622C according to the present embodiment are formed to have substantially the same length, and are obliquely provided in parallel with the diaphragm 21C and the drive unit 61C at substantially the same angle.
- angle conversion units 621D and 622D according to the present embodiment are formed to have substantially the same length, and are inclined at substantially the same angle with respect to the diaphragm 21C and the drive unit 61D.
- a magnetic circuit 5C is provided between the angle conversion transmission units 621C and 622C, and a magnetic circuit 5D is provided between the angle conversion transmission units 621D and 622D.
- each drive unit is provided with angle conversion transmission units at both ends in the moving direction, and magnetic circuits 5C and 5D are provided between the angle conversion transmission units. Since the diaphragm 21C is supported by a plurality of angle conversion transmission units provided at both ends of the diaphragm, the diaphragm 21C can be vibrated in substantially the same phase, and the vibrations generated in each drive unit can be canceled. . Further, the speaker device 1C can be made relatively small along the X-axis direction.
- the magnetic circuits 5C and 5D include a yoke 51C, a magnet 52C, and a plate 53C.
- the magnet 52C may be configured by, for example, a plurality of columnar magnets and a semi-columnar magnet.
- a plate 53C is provided below the magnets 52C, and a uniform magnetic flux distribution is formed in the magnetic gap.
- the yoke 51C includes, for example, a flat plate portion 511C, flat plate portions 512C arranged on the flat plate portion 511C at regular intervals, and support column portions 513C extending along the Z-axis direction at both ends in the Y-axis direction of the flat plate portion 511C. And have.
- the restriction portion 7C (7) includes a damper 71 and a support portion 72 that supports the drive portion.
- the support part 72 is an L-shaped member formed in the longitudinal direction along both ends of the drive part, for example, and supports each drive part.
- the end portion 72A of the support portion 72 is supported by the damper 71 so as to vibrate freely. That is, by the restriction portion 7C, each drive portion is formed to be movable only along the X-axis direction.
- the damper 71 according to the present embodiment has a damper shape that is substantially symmetrical with respect to an axis parallel to the Y-axis direction that crosses between two magnetic circuits. Specifically, the damper 71 is formed in a convex shape farther from the axis.
- the angle conversion transmission units are provided at both ends in the moving direction of each driving unit.
- the two angle conversion transmission units provided in the drive unit are joined to the diaphragm at the same angle so as to be substantially parallel, and a magnetic circuit is provided between the two angle conversion transmission units. It has the structure which was made.
- the diaphragm 21C since the diaphragm 21C is supported by a plurality of angle conversion transmission units provided at both ends of the driving unit, the entire diaphragm 21C is driven in substantially the same phase, The vibration generated in the drive unit can be canceled out. Further, a relatively large driving force can be efficiently transmitted to the diaphragm 21C.
- the speaker device 1C can be formed relatively small.
- each drive portion can be provided movably only in the X-axis direction.
- FIG. 13A is a diagram for explaining a speaker device according to a first modification.
- FIG. 13B is a diagram for explaining a speaker device according to a second modification.
- FIG. 13C is a diagram for explaining a speaker device according to a third modification.
- each of the plurality of dampers 71A is formed in a similar shape, and the center of each magnetic circuit is formed. You may arrange
- each of the plurality of dampers 71B has corrugation and is arranged so as to be substantially symmetrical with respect to an axis parallel to the Y-axis direction passing through the centers of the two magnetic circuits. May be. Further, as shown in FIG.
- each of the plurality of dampers 71C has a cross-sectional shape formed by combining a plurality of arcs, and extends in the Y-axis direction passing through the centers of the two magnetic circuits. You may arrange
- FIG. 14A is a cross-sectional view of a speaker device 1E according to another embodiment of the present invention.
- the speaker device 1E may be provided with a plurality of pairs of magnetic circuits and driving members as in the third embodiment.
- the thickness of the speaker is the same, and the driving force can be made relatively large.
- the entire diaphragm 21C is driven in substantially the same phase, and vibrations generated in each drive unit are generated. Can be offset.
- FIG. 15 is a cross-sectional view of a speaker device 1H according to another embodiment of the present invention.
- the magnetic circuit may be provided in the vicinity of the outer peripheral portion of the vibrating body (the diaphragm and the driving member). Since this magnetic circuit is provided in the vicinity of the outer peripheral portion, the speaker device can be formed thin.
- the magnetic circuit 5H is provided in the vicinity of the outer periphery of the vibrating body (the diaphragm and the driving member).
- the magnetic circuit 5H is disposed in the vicinity of the outer peripheral portion of the vibrating body, whereby the overall height of the speaker device can be reduced as compared with the conventional speaker device. Further, although not shown, a magnetic circuit employed in a conventional speaker device may be used laterally with respect to the vibration direction of the diaphragm.
- FIGS. 16 and 17 are diagrams showing a modification of the bent portion 63 that joins the angle conversion transmission portion 62 and the drive portion 61.
- the bent part 63N may be formed of a flexible member, and the angle conversion transmission part 62 and the drive part 61 may be joined so that the angle can be changed.
- the bent portion 63N is formed of a non-woven fabric 67 made of, for example, a polymer fiber such as polyaramid and a resin such as a phenolic resin.
- the angle conversion transmission part 62 and the drive part 61 are joined so as to be foldable using the bending part 63N.
- the bent portion 63N may be formed as a bent portion with a bendable resin film, for example, and is not particularly limited.
- the bent part 63M may be formed by a joint part, and the angle conversion transmission part 62M and the drive part 61M may be joined so that the angle can be changed.
- a protrusion is provided at the end of the angle conversion transmission portion 62M, and a hole that can be fitted to the protrusion is provided at the end of the drive portion 61M. It is possible to connect the angle conversion transmission unit 62M and the drive unit 61M so that they can be bent.
- the protrusion portion may be provided in the drive unit 61M and the hole may be provided in the angle conversion transmission unit 62M, and the angle conversion transmission unit 62M and the drive unit 61M may be coupled so as to be bent.
- the bending part 61M which consists of said nonwoven fabric etc. for joining with the diaphragm 21 and the angle conversion transmission part 62M.
- the angle conversion transmitting portion 62M and the vibrating plate 21 can be connected to each other so that they can be bent, or the protruding portion is connected to the vibration plate 21.
- the angle conversion transmission unit 62M and the diaphragm 21 may be connected so as to be foldable by providing the holes in the angle conversion transmission unit 62M.
- angle conversion transmission part 62M and the diaphragm 21 may be joined so as to be capable of changing the angle by a bent part or a joint part made of the flexible member.
- the speaker device 1 includes the diaphragm 21, the frame 3 that supports the diaphragm 21 so as to freely vibrate along the vibration direction, the magnetic circuit 5 provided in the frame 3, and the diaphragm 21. And a driving member 26 to be driven.
- the drive member 26 includes a voice coil 611 that is movably disposed in the magnetic gap 59 of the magnetic circuit, and a drive unit 61 that is movable along a direction different from the vibration direction of the diaphragm 21.
- One end portion is joined to the drive portion 61 so that the angle can be changed, and the other end portion has an angle conversion transmission portion 62 joined to the diaphragm 21 so that the angle can be changed.
- the angle conversion transmission unit 62 has rigidity and is inclined with respect to the vibration direction of the diaphragm 21 and the moving direction of the drive unit. That is, the speaker device 1 includes a driving unit 61 that is movably arranged in a direction different from the vibration direction of the diaphragm 21, preferably in a direction orthogonal to the vibration direction of the diaphragm, and the diaphragm 21. Since it has the angle conversion transmission part 62 provided diagonally with respect to each of the vibration direction and the moving direction of the drive part 61, the magnitude
- the angle conversion transmission unit may be provided directly on the voice coil so as to be bendable.
- the diaphragm, the drive unit with coil, and the angle conversion transmission unit may be integrally formed.
- the magnetic circuit and the movable voice coil are provided to drive the driving member 26.
- the present invention is not limited to this configuration.
- the driving force by the piezoelectric element may be transmitted to the diaphragm by the driving member.
- the joint portion of the diaphragm and the angle conversion transmission portion is bent to the bending portion that allows the joint portion of the drive unit and the angle conversion transmission portion to be bent.
- one end portion of the angle conversion transmission portion may be joined to the drive portion so that the angle can be changed, and the other end portion may be joined to the diaphragm so that the angle can be changed.
- the bending portion that allows the joint portion between the driving portion and the angle conversion transmission portion to be bent, or the bending portion that allows the joint portion between the diaphragm and the angle conversion transmission portion to be bent, or the driving portion may be a bending part that can be bent, and is not particularly limited.
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Abstract
Description
詳細には、例えば図1に示すように、上記スピーカ装置の振動板21Jの振動方向に沿った大きさは、コーン形状の振動板21Jの振動方向に沿った大きさ及び振動板21Jをフレーム3Jに支持するエッジ4Jの全高(a)、振動板21Jとダンパ7Jとの接合部から磁気回路が有するプレート53Jまでの、振動方向に沿った大きさ(b)、ボイスコイル611Jの巻幅(c)、ボイスコイル611Jの下端部から磁気回路が有するヨークまでの、振動方向に沿った大きさ(d)、磁気回路のヨーク51Jの厚み(e)、スピーカ駆動時のボイスコイルボビン610Jの最大振幅、振動板21Jや磁気回路を支持するフレーム3Jの厚み等により規定される。特に、大音量対応型スピーカ装置では、振動板21Jとダンパ7Jとの接合部から磁気回路が有するプレート53Jまでの、振動方向に沿った大きさ(b)、ボイスコイル611Jの巻幅(c)、ボイスコイル611Jの下端部から磁気回路が有するヨーク51Jまでの、振動方向に沿った大きさ(d)、等を大きく設定することを要し、振動板21Jの振動方向(音響放射方向)に沿った大きさが比較的大きい。
つまり、上述したスピーカ装置では、ボイスコイルボビン610Jの振動方向と振動板21Jの振動方向とが略平行となるように形成されているので、薄型化と大音量化とを両立させることが比較的困難である。
しかし、上記コンデンサ型スピーカ装置では、比較的大振幅の音声信号が入力されると、駆動力が非線形に著しく変化して、再生音の音質が比較的低くなる場合がある。
本発明に係るスピーカ装置は、振動板と、前記振動板を振動方向に沿って振動自在に支持するフレームと、該フレームに設けられた磁気回路と、前記振動板を駆動する駆動部材とを有し、前記駆動部材は、前記磁気回路の磁気ギャップに可動自在に配置されたボイスコイルを備えるとともに、前記振動板の振動方向に対して異なる方向に沿って移動自在に形成された駆動部と、一端部が前記駆動部に角度変更自在に接合されるとともに、他端部が前記振動板に角度変更自在に接合され、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た剛性の角度変換伝達部とを有することを特徴とする。
一方、本発明に係るスピーカ装置では、振動板の振動方向に対して異なる方向、好適には、振動板の振動方向に対して直交する方向に移動自在に配置された駆動部と、振動板の振動方向と駆動部の移動方向それぞれに対して斜めに設けられた角度変換伝達部とを有するので、上記一般的なスピーカ装置と比べて、音響放射方向に沿った大きさが比較的小さい。つまり、薄型スピーカ装置を提供することができる。
本発明に係るスピーカ装置は、例えば、携帯電話機、車載用スピーカ、パーソナルコンピュータ用スピーカ、テレビジョン放送受信機用スピーカ、など各種装置に採用することができる。
以下、本発明の一実施形態に係るスピーカ装置について、図面を参照しながら説明する。
図2は、本発明の第1実施形態に係るスピーカ装置1を説明するための図である。詳細には、図2(A)は本発明の第1実施形態に係るスピーカ装置1の正面図(振動板は図示していない)であり、図2(B)は図2(A)に示したスピーカ装置1のA-A線に沿った断面図である。図3は、図2(A),1(B)に示したスピーカ装置1の磁気回路5付近を拡大した斜視図である。図4は、図3に示したスピーカ装置1の磁気回路5の分解斜視図である。図5は、図2に示したスピーカ装置1の磁気回路5の断面図である。スピーカ装置1の振動板21による音響放射方向(SD)をZ軸方向と規定し、スピーカ装置1の長手方向(駆動部の駆動方向)をX軸方向と規定し、Z軸およびX軸に直交する方向をY軸と規定している。図2(A)において振動板1は省略されている。
以下、本実施形態に係るスピーカ装置1の各構成要素について詳細に説明する。
振動体2は、フレーム3により振動自在に支持されており、本実施形態では、振動板21、および駆動部材26を有する。
振動板21は、図2,3に示すように、振動方向(Z軸方向)に沿って振動自在にフレーム4に支持されている。振動板21は、スピーカ駆動時、音響放射方向(SD)に音波を放射する。本実施形態に係る振動板21は、エッジ4を介してフレーム3に支持されており、振動方向以外の方向、詳細にはX軸方向やY軸方向に沿った移動は、エッジ4により規制されている。このエッジ4と振動板21は、一体形成されてもよい。
振動板21の形成材料としては、例えば、樹脂系材料、金属系材料、紙系材料、セラミックス系材料、複合材料などを採用することができる。振動板21は、例えば剛性を有することが好ましい。振動板21は、例えば平板形状、ドーム形状、コーン形状などの規定形状に形成されている。本実施形態に係る振動板21は平板形状に形成されている。また、振動板21は、音響放射方向(SD)から視認した形状(平面形状)が、矩形状、楕円形状、円形状、多角形状など、規定形状に形成されている。本実施形態に係る振動板21は、平面形状が矩形状に形成されている。
振動板21は、振動自在にフレーム4に支持されており、振動板21の背面側(音響放射方向とは逆側)における、振動板21とフレーム4とで囲まれる空間を密閉しているので、振動板21の背面側から発せられる音波が音響放射方向に向けて放射されることを抑止することができる。
フレーム3は、振動板21を振動方向に沿って振動自在に支持する。本実施形態に係るフレーム3は、音響放射方向(SD)から視認すると、平面形状が矩形状に形成されており、断面形状が凹形状に形成されている。また、フレーム3は、フレーム上端部で振動板21を支持しており、磁気回路5を収容している。
図2(A),2(B)に示すように、フレーム3は、詳細には、平面形状が矩形状の平板部31と、平板部31の外周部から音響放射方向(SD)に向かって延在する矩形状の筒状部32とを有し、上部に開口部が形成されている。また、平板部31上には磁気回路5が配置され、筒状部32の上端部にはエッジ4の外周部が接着材などにより接合され、開口部にはエッジ4に支持された振動板21が配置されている。本実施形態では、筒状部32の上端部には、内側に向かって延在した上部平坦部321が形成されており、上部平坦部321にエッジ4が接合されている。フレーム3の形成材料としては、例えば樹脂、金属などの公知の材料を採用することができる。また、図2(B)に示すように、フレーム3は例えば側面部や底面部に孔部301が形成されている。この孔部301は、例えば通気孔として機能する。
また、孔部301は、例えばスピーカ装置外部に設けられた、アンプ、イコライザ、チューナ、放送受信機、テレビジョンなどの音声処理装置80と、ボイスコイル611とを電気的に接続する導電線が通る孔として用いられてもよい。また、フレーム3に端子部81を設けてもよい。この際、音声処理回路80と端子部81は導電線82により電気的に接続され、端子部81とボイスコイル611は、導電線86により電気的に接続されている。
音声処理装置80は、上記形態に限られるものではなく、例えばスピーカ装置1の内部に音声処理装置が設けられてもよい。
エッジ4は、振動板21とフレーム4と間に配置され、内周部が振動板21の外周部を支持するとともに、外周部がフレームに接合することにより、振動板21を規定位置に保持する。詳細には、エッジ4は、振動板21を振動方向(Z軸方向)に沿って振動自在に支持するとともに、振動方向に直交する方向には制動する。本実施形態に係るエッジ4は、音響放射方向から視認した場合、リング形状に形成されている。エッジ4は、図2(B)に示すように、断面形状が規定形状、例えば凸形状、凹形状、波型形状などに形成されている。本実施形態ではエッジ4は、音響方向に凹形状に形成されている。エッジ4は、例えば、皮、布、ゴム、樹脂、それらに目止め加工を施したもの、ゴムや樹脂などを規定の形状に成形された部材、等を採用することができる。
磁気回路5は、フレーム3に配置されている。本実施形態に係る磁気回路5は、図2(A),2(B)に示すように、フレーム3に収容されており、具体的にはフレーム3の平板部31上に設けられている。また、本実施形態に係る磁気回路5は、例えば図2(B)に示すように、振動板21の音響放射方向とは反対側に配置されている。磁気回路5としては、例えば、内磁型磁気回路、外磁型磁気回路、等を採用することができる。
また、本実施形態に係るボイスコイル611は、薄型の平板形状に形成されており、巻き数を比較的多くすることで、磁気ギャップ中の部分を比較的大きくすることができるので、スピーカ駆動時、比較的大きな駆動力を得ることができる。
駆動部材26は、上述したボイスコイル611を備えており、振動板21を駆動する。詳細には、駆動部材26は、音声信号が入力された際、ボイスコイル611に生じた駆動力(ローレンツ力)を振動板21に伝達し、振動板21を振動させる。
詳細には、駆動部材26は、ボイスコイル付駆動部61、および角度変換伝達部(伝達部)62、折曲部63、折曲部64を有する。
駆動部61は、磁気回路5の磁気ギャップ59に可動自在に配置されたボイスコイル611を備えるとともに、振動板21の振動方向に対して異なる方向に沿って移動自在に形成されている。
詳細には、本実施形態に係る駆動部61は、X軸方向に沿ってのみ移動自在に形成されており、それ以外の方向には移動が規制されている。この駆動部61の移動範囲の規制は、本実施形態では規制部としてダンパ7を設けたが、この形態に限られるものではない。例えば、ダンパ7を例えばエッジの形状を有する溝部などの規制部にしてもよい。
また、駆動部61は、開口部615が形成されており、その開口部615の内周部にボイスコイル611が備えられている。
上記構成の駆動部61は、絶縁部材612の内部にボイスコイル611が挿入された構造を有するので、ボイスコイル611の強度を補強することができ、ボイスコイル611の歪みを低減することができる。
上記構成の駆動部61は、開口部615は、磁気回路5の支柱部513に遊嵌された構成を有するので、磁気回路5および駆動部61の設置スペースを比較的小さくすることができる。
角度変換伝達部62は、駆動部61と振動板21との間に配置され、駆動部61から振動板21に駆動力を伝達する。
詳細には、角度変換伝達部62は、一端部が駆動部61に角度変更自在に接合されているとともに、他端部が振動板21に角度変更自在に接合されている。
より詳細には、角度変換伝達部62は、一端部が駆動部61に折曲自在又は屈曲自在に接合されるとともに、他端部が振動板21に折曲自在又は屈曲自在に接合されている。
具体的には、角度変換伝達部62は、下端部は、例えば折曲部63を介して駆動部61の端部に折曲自在に接合されており、水平方向(X軸方向、駆動部61の移動方向)に沿ってのみ移動自在で、それ以外の方向、例えばZ軸方向、Y軸方向への移動は規制されている。
また、具体的には、角度変換伝達部62の上端部は、折曲部64を介して振動板21に折曲自在に接合されており、音響放射方向(Z軸方向)に沿ってのみ移動自在で、それ以外の方向、例えばY軸方向、X軸方向への移動は規制されている。
本実施形態では、角度変換伝達部62の上端部は、角度変換伝達部62の重心位置の裏面側に折曲自在に接合されている。
本実施形態に係る角度変換伝達部62は、板形状に形成されているが、この形態に限らず棒形状に形成されていてもよい。例えば、角度変換伝達部62は、スピーカ駆動時でも、駆動部61との接合部と、振動板21との接合部との間の距離が一定となるような形状で剛性を備えていればよい。角度変換伝達部62は、例えば断面形状が波形状などの規定形状であってもよい。このように、角度変換伝達部62は、剛性を有するので、スピーカ駆動時に撓むことなく、また伸縮することなく、駆動部61から振動板21に駆動力を伝達することができる。また、角度変換伝達部62は剛性を有するので、固有振動モードでの振動が発生しにくく、振動板21の振動への影響を抑止し、音響特性が低減することを抑止できる。
折曲部63は、例えば、駆動部61と角度変換伝達部62との間に形成されており、駆動部61と角度変換伝達部62とを折曲自在に接合している。この折曲部63は、機械的な構造の関節(ジョイント)で構成されていてもよいし、ポリエステルやポリアラミド等の高分子から成る繊維にて構成される部材、ポリウレタン樹脂やゴム等から成る部材、可撓性フィルムなどの可撓性部材により構成されていてもよい。また、例えば駆動部61および角度変換伝達部62が樹脂材料などの規定材料により一体形成されて、所定箇所に折り曲げ自在となるように加工処理を施して折曲部63を形成してもよい。
折曲部64は、角度変換伝達部62と振動板21の間に形成されており、角度変換伝達部62と振動板21とを折曲自在に接合している。この折曲部64は、機械的な構造の関節(ジョイント)で構成されていてもよいし、可撓性フィルムなどの可撓性部材により構成されていてもよい。
また、角度変換伝達部62の端部近傍に折曲部64を形成して、角度変換伝達部62の端部を振動板21に形成された溝部または孔部に嵌合した構造に形成して、角度変換伝達部62と振動板21を折曲自在に接合してもよい。
また、例えば振動板21および角度変換伝達部62が樹脂材料などの規定材料などにより一体形成されて、所定箇所に屈曲自在となるように加工処理を施して屈曲部を形成してもよい。
また、駆動部61と角度変換伝達部62との接合部を屈曲自在にする屈曲部へ、振動板21と角度変換伝達部62との接合部を折曲自在にする折曲部にすることで、角度変換伝達部の一端部が駆動部61に角度変更自在に接合され、他端部が振動板21に角度変更自在に接合されていても構わない。また、駆動部61と角度変換伝達部62との接合部を折曲自在にする折曲部へ、振動板21と角度変換伝達部62との接合部を屈曲自在にする屈曲部にすること、又は駆動部61と角度変換伝達部62との接合部、振動板21と角度変換伝達部62との接合部をともに屈曲自在にする屈曲部であっても構わなく、特に限定されない。
規制部(ダンパ)7は、駆動部61が磁気回路5に接触しないように、駆動部61を磁気回路5の磁気ギャップ59内の規定位置に保持するとともに、駆動部61を駆動方向(X軸方向)に沿って振動自在に支持している。この規制部7は、駆動部61の駆動方向と異なる方向、例えばZ軸方向やY軸方向には、駆動部61の移動を規制している。
本実施形態に係る規制部7は、例えば板形状に形成され可撓性を有する。また、規制部7は断面形状が、凸形状、凹形状、波型形状など、厚みが均一、不均一など各種形状に形成されていてもよい。
規制部7は、例えば一端部が駆動部61に接合し、他端部がフレーム3に接合している。規制部7は、この形態に限られるものではなく、例えば一端部が駆動部61に接合し、他端部が磁気回路5に接合した構成となっていてもよい。
図6は、本発明の第1実施形態に係るスピーカ装置1の動作を説明するための図である。詳細には、図6(A)は振動板21が基準位置に位置した状態のスピーカ装置1の断面図である。図6(B)は振動板21が基準位置に対して音響放射側に変位している状態のスピーカ装置1の断面図である。図6(C)は振動板21が基準位置に対して音響放射側に対して反対方向に変位している状態のスピーカ装置1の断面図である。図6(D)はスピーカ装置1の振動板21と駆動部材26の動作を説明するための図である。
例えば、スピーカ駆動前、駆動部61、角度変換伝達部62、振動板21それぞれは、基準位置に配置されている。静止時、駆動部61と角度変換伝達部62のなす角度θ1は所定角度(約150度)であり、振動板21と角度変換伝達部62のなす角度θ2は所定角度(約30度)である。角度変換伝達部62は、駆動部61および振動板21それぞれに対して斜設されている。上記角度θ1,θ2は、上記形態に限られるものではない。また、角度θ1,θ2は0度,90度以外であることが好ましい。
音声信号が、音声処理装置80などから導電線82,端子部81,導電線86を介してボイスコイル611に入力されると、磁気回路5の磁気ギャップ59内に配置されたボイスコイル611には、X軸方向に沿ってローレンツ力が生じる。
詳細には、音声信号がボイスコイル611に入力された場合、図6(B),6(C)に示すように、ボイスコイル611に生じたローレンツ力により、駆動部61がX軸方向に沿って振動する。
そして、角度変換伝達部62は、下端部が駆動部61の移動方向(X軸方向)に沿って振動するとともに、上端部が振動板21の振動方向(Z軸方向)に沿って振動し、ボイスコイル611による移動方向に沿った駆動力の方向を、振動板21の振動方向に沿った方向に角度変換して、該駆動力を駆動部61から振動板21に伝達する。
そして、振動板21は、角度変換伝達部62から駆動力を受けて、Z軸方向に沿って振動する。
つまり、スピーカ装置1は、振動板21の振動方向に対して異なる方向、好適には、振動板の振動方向に対して直交する方向に移動自在に配置された駆動部61と、振動板21の振動方向と駆動部61の移動方向それぞれに対して斜めに設けられた角度変換伝達部62とを有するので、一般的なスピーカ装置と比べて、音響放射方向に沿った大きさ(スピーカ装置の全高)が比較的小さい。つまり、薄型スピーカ装置を提供することができる。
図7は本発明の第2実施形態に係るスピーカ装置1Aを説明するための図である。詳細には、図7(A)は振動板が基準位置に対して変位0である状態のスピーカ装置の断面図である。図7(B)は振動板が基準位置に対して音響放射側に変位している状態のスピーカ装置1Aの断面図である。図7(C)は振動板の基準位置に対して音響放射側に対して反対方向に変位している状態のスピーカ装置1Aの断面図である。以下、第1実施形態と同一の構成については説明を省略する。
スピーカ装置1Aでは、駆動部61A,61Bそれぞれのボイスコイルに、音声処理装置80から端子部81A,81Bを介して同一の音声信号が入力されると、図7(A)~7(C)に示すように、X軸方向に沿って互いに反対方向にローレンツ力(駆動力)が生じる。駆動部61A,61Bは、互いにX軸方向に沿って反対方向に振動する。そして駆動力が、角度変換伝達部62A,62Bを介して振動板21に伝達されて、振動板21がZ軸方向に沿って振動する。この際、駆動部61A,61Bは、互いにX軸方向に沿って反対方向に振動するので、不要な振動を相殺することができる。つまり第1実施形態と比べて、本実施形態に係るスピーカ装置1Aは、比較的高音質の音波を放射することができる。
図8は、本発明の第3実施形態に係るスピーカ装置1Bを説明するための図である。詳細には、図8(A)は振動板が基準位置に対して変位0である状態場合のスピーカ装置1Bの断面図である。図8(B)は振動板が基準位置に対して音響放射側に変位している状態のスピーカ装置1Bの断面図である。図8(C)は振動板の基準位置に対して音響放射側に対して反対方向に変位している状態のスピーカ装置1Bの断面図である。以下、第1および第2実施形態と同じ構成については説明を省略する。
図9は、本発明の第4実施形態に係るスピーカ装置1Cの斜視図である。図10は図9に示したスピーカ装置1Cの断面斜視図である。図11は、図9に示したスピーカ装置1Cの要部の上面図である。図12は、図9に示したスピーカ装置1Cの要部の上面図である。以下、第1~第3実施形態と同じ構成については説明を省略する。図9,図10において、振動板は省略している。図10において、図に向かって右側の磁気回路5Dの一部は、省略している。
また、角度変換部621C,621Dは、振動板21の中央部(重心位置)に、折曲部641(64)を介して折曲自在に接合されている。また、この角度変換部622C,622Dは、振動板21の中央部(重心位置)より外周部側の位置にて、折曲部を介して折曲自在に接合されている。
また、本実施形態に係る角度変換部621C,622C,621D,622Dは、端部付近に折曲端部65が形成されており、折曲端部65が振動板21Cに形成された溝部214(214A~214C)に嵌合している。
また、例えば、折曲端部65は、振動板21Cの表側面から突出した状態で固定されている。この振動板21Cは、突出部215が形成されているので比較的大きな強度を有し、振動板のたわみ等の発生を抑止することができ、振動板21C全体を略同位相にて振動させることができる。
ヨーク51Cは、例えば、平板部511Cと、平板部511C上に規定間隔で配置された平板部512Cと、平板部511CのY軸方向の両端部にZ軸方向に沿って延在した支柱部513Cとを有する。
このため、スピーカ装置1Cは、駆動部の両端部に設けられた複数の角度変換伝達部によって振動板21Cが支持されているので、振動板21Cの全体を略同位相にて駆動すること、各駆動部に発生した振動を相殺することができる。また、比較的大きな駆動力を、振動板21Cに効率よく伝達することができる。また、スピーカ装置1Cを比較的小型に形成することができる。
図13(A)は、第1変形例に係るスピーカ装置を説明するための図である。図13(B)は、第2変形例に係るスピーカ装置を説明するための図である。図13(C)は、第3変形例に係るスピーカ装置を説明するための図である。
また、図13(B)に示すように、複数のダンパ71Bそれぞれは、コルゲージョンを有し、2つの磁気回路の中心を通るY軸方向に平行な軸に対して、略対称となるように配置されてもよい。
また、図13(C)に示すように、複数のダンパ71Cそれぞれは、断面形状が複数の円弧状を合わせたような形状に形成されており、2つの磁気回路の中心を通るY軸方向に平行な軸に対して、略対称となるように配置されてもよい。
また、ダンパは、その他の形状や配置であってもよい。
図14(A)は、本発明の他の実施形態に係るスピーカ装置1Eの断面図である。
例えば、図14(A)に示すように、スピーカ装置1Eは、第3実施形態のような一対の磁気回路と駆動部材を、複数個設けられていてもよい。この構成のスピーカ装置1Eでは、スピーカの厚みが同じで、駆動力を比較的大きくすることができる。また、駆動部の両端部に設けられた複数の角度変換伝達部によって振動板21Cを支持することで、振動板21Cの全体を略同位相にて駆動すること、各駆動部に発生した振動を相殺することができる。
磁気回路は、振動体(振動板および駆動部材)の外周部近傍に設けられていてもよい。この磁気回路が外周部近傍に設けられているので、スピーカ装置を薄型に形成することができる。
また、図15に示すように、本発明に係るスピーカ装置1Hは、磁気回路5Hが、振動体(振動板および駆動部材)の外周部近傍に設けられている。
図16に示すように、折曲部63Nをフレキシブル部材により形成して、角度変換伝達部62と駆動部61とを角度変更自在に接合してもよい。詳細には、図16に示すように、折曲部63Nは、例えばポリアラミド等の高分子の繊維と、フェノール系樹脂等の樹脂などで構成される不織布67にて形成されており、このような折曲部63Nを用いて、角度変換伝達部62と駆動部61とを折り曲げ自在に接合している。また、折曲部63Nは、不織布以外に、例えば屈曲可能な樹脂フィルムなどで屈曲部として形成してもよく、特に限定はしない。
また、上記の不織布等からなる折曲部61Mを、振動板21と角度変換伝達部62Mとの接合に用いても構わない。
また、突起状部を角度変換伝達部62Mに設け、孔を振動板21に設けることで、角度変換伝達部62Mと振動板21とを折り曲げ自在に連結すること、或いは突起状部を振動板21に設け、孔を角度変換伝達部62Mに設けることで、角度変換伝達部62Mと振動板21とを折り曲げ自在に連結しても構わない。
つまり、スピーカ装置1は、振動板21の振動方向に対して異なる方向、好適には、振動板の振動方向に対して直交する方向に移動自在に配置された駆動部61と、振動板21の振動方向と駆動部61の移動方向それぞれに対して斜めに設けられた角度変換伝達部62とを有するので、一般的なスピーカ装置と比べて、音響放射方向に沿った大きさが比較的小さい。つまり、薄型スピーカ装置を提供することができる。
また、振動板と、コイル付駆動部と、角度変換伝達部とが一体形成されていてもよい。
また、上述した実施形態に係るスピーカ装置では、駆動部材26を駆動するために、磁気回路と可動型ボイスコイルを設けたが、この形態に限られるものではない。例えば、圧電素子による駆動力を駆動部材により振動板に伝達してもよい。
また、上記の実施形態に関し、第1実施形態と同様に、駆動部と角度変換伝達部との接合部を屈曲自在にする屈曲部へ、振動板と角度変換伝達部との接合部を折曲自在にする折曲部にすることで、角度変換伝達部の一端部が駆動部に角度変更自在に接合され、他端部が振動板に角度変更自在に接合されていても構わない。また、駆動部と角度変換伝達部との接合部を折曲自在にする折曲部へ、振動板と角度変換伝達部との接合部を屈曲自在にする屈曲部にすること、又は駆動部と角度変換伝達部との接合部、振動板と角度変換伝達部との接合部がともに屈曲自在にする屈曲部であっても構わなく、特に限定されない。
Claims (31)
- 振動板と、前記振動板を振動方向に沿って振動自在に支持するフレームと、該フレームに設けられた磁気回路と、前記振動板を駆動する駆動部材とを有し、
前記駆動部材は、前記磁気回路の磁気ギャップに可動自在に配置されたボイスコイルを備えるとともに、前記振動板の振動方向に対して異なる方向に沿って移動自在に形成された駆動部と、
一端部が前記駆動部に角度変更自在に接合されるとともに、他端部が前記振動板に角度変更自在に接合され、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た剛性の角度変換伝達部と
を有することを特徴とするスピーカ装置。 - 前記角度変換伝達部は、前記一端部が前記駆動部に屈曲自在又は折曲自在に接合されるとともに、他端部が前記振動板に屈曲自在または折曲自在に接合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。
- 前記角度変換伝達部は、前記一端部が前記駆動部の移動方向に沿って振動するとともに、前記他端部が前記振動板の振動方向に沿って振動し、前記ボイスコイルによる前記移動方向に沿った駆動力の方向を、前記振動板の振動方向に沿った方向に角度変換して、該駆動力を前記駆動部から前記振動板に伝達することを特徴とする請求項1に記載のスピーカ装置。
- 前記駆動部は、前記振動板の振動方向に対して直交する方向に沿って移動自在に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。
- 前記磁気回路および前記駆動部材を複数備えることを特徴とする請求項1に記載のスピーカ装置。
- 前記複数の角度変換伝達部は、前記振動板に所定間隔で屈曲自在又は折曲自在に接合されていることを特徴とする請求項5に記載のスピーカ装置。
- 前記複数の角度変換伝達部は、前記他端部が前記振動板に互いに接するように屈曲自在又は折曲自在に接合されていることを特徴とする請求項5に記載のスピーカ装置。
- 複数の前記磁気回路と複数の前記駆動部材とを有し、
一対の前記駆動部材の駆動部は、互いに逆方向に振動するように構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。 - 前記駆動部は、前記移動方向の両端部それぞれに前記角度変換伝達部が設けられており、該角度変換伝達部の間に前記磁気回路が設けら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。
- 前記駆動部は、前記移動方向の両端部それぞれに前記角度変換伝達部が設けられ、
前記駆動部に設けられた2つの角度変換伝達部は、略対称となるように前記振動板に屈曲自在又は折曲自在に接合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。 - 前記複数の前記角度変換伝達部は、前記振動板または前記駆動部となす角度が略同じであることを特徴とする請求項9に記載のスピーカ装置。
- 前記磁気回路は、前記振動板と前記駆動部材とを有する振動体の外周部近傍に設けら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。
- 前記角度変換伝達部は、平板形状に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。
- 前記駆動部は、平板形状に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。
- 前記駆動部は、前記磁気回路の磁気ギャップ内に前記ボイスコイルが配置されるとともに、該ボイスコイルから前記移動方向に沿って前記磁気ギャップ外まで延出した形状の絶縁部材を有し、
前記角度変換伝達部は、前記絶縁部材の前記移動方向に沿った端部に折曲部又は屈曲部を介して接合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。 - 前記駆動部は、開口部を備えることを特徴とする請求項1に記載のスピーカ装置。
- 前記磁気回路は、ヨーク、および磁石を有し、
前記ヨークは、平坦部と、該平坦部に略直交する方向へ延在する支柱とを有し、
前記駆動部は、前記移動方向に移動自在となるように、前記開口部が前記支柱に遊嵌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。 - 前記駆動部は、前記開口部が前記支柱に遊嵌した状態で移動範囲が規制されていることを特徴とする請求項17に記載のスピーカ装置。
- 前記磁気回路は、ヨーク、磁石、およびプレートを有することを特徴とする請求項1に記載のスピーカ装置。
- 前記磁石は、前記ヨークの平坦部に配置されていることを特徴とする請求項19に記載のスピーカ装置。
- 前記角度変換伝達部は、通気孔を備えることを特徴とする請求項1に記載のスピーカ装置。
- 前記振動板は、エッジを介して前記フレームに振動方向に沿って振動自在に支持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。
- 前記駆動部を前記移動方向に沿って移動自在に支持し、且つそれ以外の方向への移動を規制する規制部を備えることを特徴とする請求項1に記載のスピーカ装置。
- 前記フレームは、通気孔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。
- 前記振動板は、平板形状に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。
- 前記振動板は、突起状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。
- 前記角度変換伝達部と前記駆動部は折曲部又は屈曲部を介して接合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。
- 前記角度変換伝達部と前記駆動部は、フレキシブル部材または関節部により角度変更自在に接合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。
- 前記複数の駆動部材のボイスコイルには、略同一の音声信号が入力されることを特徴とする請求項5に記載のスピーカ装置。
- 前記ボイスコイルは略矩形状に形成されており、
前記ボイスコイルの直線部の長手方向と、駆動部の移動方向に対して直交する方向とが略一致するように規定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。 - 前記振動板は、エッジを介して前記フレームに振動方向に沿って振動自在に支持されており、前記エッジは前記振動板の背面側及び前記フレームの内側に取り付けら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。
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EP08704006A EP2124480B1 (en) | 2008-01-28 | 2008-01-28 | Speaker device |
BRPI0805809-1A BRPI0805809A2 (pt) | 2008-01-28 | 2008-01-28 | dispositivo de alto-falante |
CN200880000683.3A CN101682819B (zh) | 2008-01-28 | 2008-01-28 | 扬声装置 |
PCT/JP2008/051197 WO2009095984A1 (ja) | 2008-01-28 | 2008-01-28 | スピーカ装置 |
DK08704006.9T DK2124480T3 (da) | 2008-01-28 | 2008-01-28 | Højtalerindretning |
JP2008540802A JP4457165B2 (ja) | 2008-01-28 | 2008-01-28 | スピーカ装置 |
AT08704006T ATE549869T1 (de) | 2008-01-28 | 2008-01-28 | Lautsprechereinrichtung |
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TW098103062A TWI408970B (zh) | 2008-01-28 | 2009-01-23 | Loudspeaker device |
US13/272,794 US8457344B2 (en) | 2008-01-28 | 2011-10-13 | Speaker device |
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WO2011046030A1 (ja) * | 2009-10-15 | 2011-04-21 | パイオニア株式会社 | スピーカ装置 |
JPWO2011046030A1 (ja) * | 2009-10-15 | 2013-03-07 | パイオニア株式会社 | スピーカ装置 |
WO2011077560A1 (ja) * | 2009-12-25 | 2011-06-30 | パイオニア株式会社 | スピーカ用振動体、スピーカ装置 |
CN102172045A (zh) * | 2009-12-25 | 2011-08-31 | 日本先锋公司 | 扬声器用振动体、扬声器装置 |
JPWO2011077560A1 (ja) * | 2009-12-25 | 2013-05-02 | パイオニア株式会社 | スピーカ用振動体、スピーカ装置 |
CN107277671A (zh) * | 2016-04-01 | 2017-10-20 | 宁波升亚电子有限公司 | 全方位发声式音箱及其制造方法 |
CN107277671B (zh) * | 2016-04-01 | 2024-02-06 | 宁波升亚电子有限公司 | 全方位发声式音箱及其制造方法 |
Also Published As
Publication number | Publication date |
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US8457344B2 (en) | 2013-06-04 |
EP2124480A4 (en) | 2010-09-08 |
ES2382564T3 (es) | 2012-06-11 |
EP2124480B1 (en) | 2012-03-14 |
US20120045073A1 (en) | 2012-02-23 |
JP4457165B2 (ja) | 2010-04-28 |
US8139813B2 (en) | 2012-03-20 |
CN101682819A (zh) | 2010-03-24 |
TWI408970B (zh) | 2013-09-11 |
EP2124480A1 (en) | 2009-11-25 |
TW200935964A (en) | 2009-08-16 |
ATE549869T1 (de) | 2012-03-15 |
DK2124480T3 (da) | 2012-05-07 |
US20110069859A1 (en) | 2011-03-24 |
BRPI0805809A2 (pt) | 2011-08-30 |
CN101682819B (zh) | 2013-10-30 |
JPWO2009095984A1 (ja) | 2011-05-26 |
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