WO2016195093A1 - Dispositif d'entraînement et dispositif portatif équipé de ce dernier - Google Patents

Dispositif d'entraînement et dispositif portatif équipé de ce dernier Download PDF

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Publication number
WO2016195093A1
WO2016195093A1 PCT/JP2016/066653 JP2016066653W WO2016195093A1 WO 2016195093 A1 WO2016195093 A1 WO 2016195093A1 JP 2016066653 W JP2016066653 W JP 2016066653W WO 2016195093 A1 WO2016195093 A1 WO 2016195093A1
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WO
WIPO (PCT)
Prior art keywords
power
power receiving
yoke
magnet
magnetic field
Prior art date
Application number
PCT/JP2016/066653
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English (en)
Japanese (ja)
Inventor
ナムトゥン ブー
太樹 末吉
畑中　武蔵
真弥 井上
尚 津田
Original Assignee
日東電工株式会社
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Publication of WO2016195093A1 publication Critical patent/WO2016195093A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • 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

Definitions

  • the present invention relates to a driving device that operates with electric power charged in a secondary battery and a portable device including the driving device.
  • a headset disclosed in Patent Document 1 is exemplified as a device that operates with power charged in a secondary battery.
  • This headset is configured such that a secondary battery, a charging mini USB connector socket, a microphone, and a printed circuit board are accommodated in a housing, and an earphone microphone is provided outside the housing.
  • the headset is required to be able to easily change the size and design of the housing depending on the capacity and fashion of the secondary battery.
  • a demand is not limited to a headset, but is present in all devices in which a drive device such as an earphone microphone is provided in a housing having a secondary battery, and is particularly noticeable in portable devices having a small housing volume.
  • an object of the present invention is to provide a driving device capable of expanding the degree of design freedom when determining the size and design, and a portable device equipped with the driving device.
  • 1st invention is a drive device which is provided in the device main body provided with the secondary battery, and is supplied with electric power charged in the secondary battery, and operates using the electric power charged in the secondary battery And a power receiving mechanism for receiving power for charging the secondary battery.
  • 2nd invention is 1st invention, Comprising:
  • the said drive mechanism is provided with the magnet and yoke which form a magnetic circuit,
  • the said yoke is arrange
  • the said power receiving mechanism Has a power receiving coil that generates power by wireless power feeding.
  • the magnetic field generated when the power receiving coil generates power flows through the yoke, and the magnetic field reaching the magnet is reduced. Therefore, the performance of the magnet is reduced by the magnetic field of the power receiving coil. A decrease can be prevented.
  • the third invention is the second invention, and includes a magnetic member disposed between the power receiving coil and the yoke.
  • the 4th invention is 2nd or 3rd invention, Comprising:
  • the said drive mechanism has arrange
  • move by the change of a magnetic field in the magnetic pole direction of a magnet can be arrange
  • the 5th invention is 2nd or 3rd invention, Comprising:
  • the said drive mechanism has arrange
  • the demagnetizing field due to the receiving coil with respect to the N-pole surface and the S-pole surface of the magnet is further reduced, so that demagnetization and demagnetization of the magnet due to the demagnetizing field can be reduced.
  • the sixth invention is any one of the second to fifth inventions, wherein the power receiving coil in the power receiving mechanism generates electric power by magnetic resonance type wireless power feeding.
  • the seventh invention is any one of the first to sixth inventions, wherein the driving mechanism is a speaker.
  • the eighth invention includes the drive device according to any one of the first to seventh inventions.
  • a ninth aspect of the present invention is a drive device that is provided in a device body including a secondary battery and is supplied with electric power charged in the secondary battery, the drive mechanism that operates using the electric power, and the second And a circuit board having a charging circuit for controlling charging of the secondary battery.
  • the tenth aspect of the present invention is the ninth aspect of the present invention, comprising a power receiving mechanism that receives power for charging the secondary battery.
  • An eleventh invention is the tenth invention, wherein the drive mechanism includes a magnet and a yoke forming a magnetic circuit, and the yoke is disposed between the power receiving mechanism and the magnet, and the power receiving mechanism Has a power receiving coil that generates power by wireless power feeding.
  • the magnetic field generated when the power receiving coil generates power flows through the yoke, and the magnetic field reaching the magnet is reduced. Therefore, the performance of the magnet is reduced by the magnetic field of the power receiving coil. A decrease can be prevented.
  • the twelfth invention is the eleventh invention, comprising a magnetic member disposed between the power receiving coil, the yoke and the circuit board.
  • the yoke is induction-heated by the magnetic field of the power receiving coil. As a result, it is possible to prevent the performance of the circuit board from being deteriorated and to prevent each circuit of the circuit board from being affected by the magnetic field.
  • the thirteenth aspect of the present invention is any one of the tenth to twelfth aspects of the present invention, wherein the power receiving coil in the power receiving mechanism generates electric power by wireless power feeding of a magnetic resonance method.
  • the fourteenth invention is any of the ninth to thirteenth inventions, wherein the drive mechanism is a speaker.
  • the fifteenth aspect includes the drive device according to any of the ninth to fourteenth aspects.
  • the degree of design freedom in determining the size and design can be expanded.
  • the drive device 1 is provided in a device main body 2 including a secondary battery 22, and is configured to be supplied with electric power charged in the secondary battery 22.
  • the driving device 1 include an acoustic device including a speaker, a moving device and a vibration device including a motor, and an optical device including a light source.
  • the present invention is not limited to this.
  • the present invention may be applied to a stationary device such as a personal computer.
  • the apparatus main body 2 include a configuration in which main parts and the secondary battery 22 are accommodated in a casing of a transport device or a portable device.
  • the drive device 1 includes a drive mechanism 11 that operates using power charged in the secondary battery 22, and a power reception mechanism 13 that receives power for charging the secondary battery 22.
  • the drive mechanism 11 including the power receiving mechanism 13 can eliminate the location of the power receiving mechanism 13 in the apparatus main body 2, and thus the design freedom in determining the size and design of the apparatus main body 2. It is possible to expand the degree.
  • the drive mechanism 11 includes a mechanism that incorporates components such as a speaker and a motor that convert electric power into kinetic energy, a light emitting mechanism and an illumination mechanism that incorporate components such as an LED light source and a laser light source that convert electric power into light energy, and a microcomputer. Although illustrated, all types of equipment that operates with electrical power are applicable.
  • the power receiving mechanism 13 is configured to support wireless power feeding in which power is fed in a mechanically non-contact state. Examples of the wireless power feeding include an electromagnetic induction method, a magnetic field resonance method (magnetic resonance method), and a radio wave method.
  • the driving device 1 includes a circuit board 14.
  • the circuit board 14 has a charging circuit 141 that controls charging of the secondary battery 22.
  • the charging circuit 141 may be a circuit having a function of controlling discharge. Since the driving device 1 includes the circuit board 14 of the charging circuit 141, it is possible to eliminate the place where the circuit board 14 is disposed in the apparatus main body 2 as compared with the case where the circuit board 14 is provided in the apparatus main body 2. It is possible to expand the degree of design freedom when determining the size and design.
  • the charging circuit 141 has a switch function for switching charging of the secondary battery 22 inside the circuit.
  • the circuit board 14 includes a rectifying / stabilizing unit 1411 that outputs DC power by rectifying AC power supplied from the outside via the power receiving mechanism 13 that outputs AC power, and a rectifying / stabilizing unit.
  • the charging unit 1412 that supplies the DC power output from the conversion unit 1411 to the secondary battery 22 with a charging voltage, the transformer unit (processing unit) 1415 that performs signal processing, and the input of power to the charging unit 1412 are detected.
  • the transformer unit (processing unit) 1415 is connected to the drive mechanism 11 that operates by the charging power of the secondary battery 22.
  • the rectification / stabilization unit 1411 can use a rectification / stabilization IC.
  • the rectification / stabilization IC is an IC in which various functions such as full-bridge synchronous rectification, voltage conditioning and wireless power control, and a protection function against voltage / current / temperature abnormalities are integrated on one chip.
  • the power output from the power receiving mechanism 13 is DC power
  • the rectification / stabilization unit 1411 is omitted.
  • the charging unit 1412 is an IC (charging circuit) for a constant current / constant voltage linear charger, a function for notifying that the charging current has decreased to a predetermined value of a set value, a charging end function by a timer, and thermal feedback It has a charging current stabilization function, a chip temperature limiting function during high power operation and under high ambient temperature conditions, and the like.
  • the transformer unit (processing unit) 1415 is a transformer circuit that functions as a transformer unit that performs signal processing for converting the charging power of the secondary battery 22 into the driving power of the driving mechanism 11 and outputting it.
  • the transformer (processing unit) 1415 can apply a linear regulator as a step-down use, and can apply a switching regulator as a step-up and step-down use. Each of these regulators can be exemplified by a method of turning on and off current at high speed by a semiconductor element.
  • the detection unit 1417 is a detection circuit that outputs a detection signal indicating that DC power is output from the rectification / stabilization unit 1411 to the charging unit 1412.
  • the detection unit 1417 may be formed of an analog circuit such as a transistor. More specifically, the detection unit 1417 connects the base terminal of the NPN transistor to the output power line between the rectification / stabilization unit 1411 and the charging unit 1412, and connects the emitter terminal to the ground.
  • the collector terminal is connected to the positive side of the secondary battery 22 via a resistor so as to be in a high impedance state and connected to the input terminal of the switching control unit 1416.
  • the base terminal of the detection unit 1417 becomes low level, and the emitter terminal and collector terminal are in a non-conductive state.
  • the signal is input to the input terminal of the switching control unit 1416.
  • the base terminal becomes high level, and as a result, the collector terminal and the emitter terminal become conductive, and the collector terminal is grounded. It changes to a low level detection signal.
  • the detection unit 1417 may be formed of a digital circuit.
  • the switching control unit 1416 puts the transformation unit (processing unit) 1415 into a stopped state when a low level detection signal is input from the detection unit 1417, while receiving a high level detection signal (low level detection).
  • This is a switching control circuit that activates the transformer (processing unit) 1415 when no signal is input.
  • the low level detection signal is used as the stop condition of the transformer (processing unit) 1415 and the high level detection signal is used as the operating condition of the transformer (processing unit) 1415.
  • a low level detection signal may be used as a start condition for the transformer (processing unit) 1415 and a high level detection signal may be used as a stop condition for the transformer (processing unit) 1415.
  • the circuit board 14 is configured to prohibit the operation of the drive mechanism 11 when the secondary battery 22 is charged and allow the operation of the drive mechanism 11 when charging is stopped.
  • the circuit board 14 can be formed with high density with a simple circuit configuration.
  • the charging circuit 141 can output an on / off signal indicating the timing of charging, and outputs an on / off signal to the switch unit 21 including an on / off switch provided in the apparatus body 2.
  • the charging of the secondary battery 22 may be switched.
  • the switch unit 21 may be provided on the circuit board 14 of the driving device 1 together with the charging circuit 141.
  • the drive mechanism 11 in the drive device 1 when the drive mechanism 11 in the drive device 1 includes a magnet 111 and a yoke 112 that form a magnetic circuit, the yoke 112 is disposed between the power receiving mechanism 13 and the magnet 111,
  • the power receiving mechanism 13 may include a power receiving coil 131 that generates power by wireless power feeding.
  • the performance of the magnet 111 is reduced by the magnetic field of the power receiving coil 131. A decrease can be prevented.
  • the drive mechanism 11 includes the magnet 111 and the yoke 112
  • the performance due to induction heating of the yoke 112 by the magnetic field of the power receiving coil 131 is reduced.
  • the magnetic member 12 is formed of a resin in which magnetic powder is dispersed.
  • the resin used in the magnetic member 12 may be a thermosetting resin or a thermoplastic resin, and is not particularly limited.
  • thermosetting resin an epoxy resin, a phenol resin, a melamine resin, a vinyl ester resin, a cyano ester resin, a maleimide resin, a silicon resin, etc.
  • thermoplastic resins include acrylic resins, vinyl acetate resins, polyvinyl alcohol resins, and the like.
  • a resin mainly composed of an epoxy resin is used.
  • soft magnetic powder is used as the magnetic powder dispersed in the resin.
  • the soft magnetic powder is not particularly limited, but pure Fe, Fe—Si, Fe—Al—Si (Sendust), Fe—Ni (Permalloy), soft ferrite, Fe-based amorphous, Co-based amorphous, Fe -Co (permendule) or the like can be used. Further, the shape of the magnetic member 12 is also appropriately selected.
  • the secondary battery 22 all types of chargeable / dischargeable batteries can be applied.
  • lead storage battery, control valve type lead storage battery, lithium / air battery, lithium ion battery, lithium ion polymer battery, lithium iron phosphate battery, lithium / sulfur battery, titanic acid / lithium battery, nickel / cadmium storage battery, nickel / Rechargeable hydrogen battery, nickel / iron battery, nickel / lithium battery, nickel / zinc battery, rechargeable alkaline battery, sodium / sulfur battery, redox flow battery, zinc / bromine flow battery, silicon battery, silver-zinc battery (Silver-Zinc) ) Etc. can be illustrated as the secondary battery 22.
  • the nominal voltage of the nickel metal hydride secondary battery 22 is 1.2V to 1.4V, similar to the nominal voltage of the air battery which is the primary battery.
  • nominal voltage is a value determined as a measure of the voltage between the terminals obtained when the battery is used in a normal state. For a battery that is nearly fully charged, a terminal that is higher than the nominal voltage. A voltage can be obtained, but when discharging progresses or when a large current is supplied to the load, the terminal voltage is lower than the nominal voltage.
  • the secondary battery 22 whose nominal voltage exceeds the nominal voltage of the air battery, lead storage battery, control valve type lead storage battery, lithium / air battery, lithium ion battery, lithium polymer battery, manganese dioxide lithium secondary battery 22, carbon titanate carbon
  • the lithium secondary battery 22 etc. can be illustrated.
  • the nominal voltage of lithium ion batteries and lithium polymer batteries is 3.6V to 3.7V.
  • the nominal voltage of the manganese dioxide lithium secondary battery 22 is 3.0V.
  • the nominal voltage of the carbon lithium titanate secondary battery 22 is 1.5V.
  • the voltage range between the “end-of-discharge voltage” and the “end-of-charge voltage” in the lithium ion battery is 2.7V to 4.2V.
  • the “end-of-discharge voltage” refers to the lowest value of the discharge voltage that allows safe discharge, and the “end-of-charge voltage” refers to the highest value of the charge voltage that allows safe charge.
  • the secondary battery 22 is preferably a lithium ion battery.
  • the nominal voltage of the lithium ion battery is in the range of 3.6 V to 3.7 V, it exceeds the nominal voltage of 1.2 V to 1.4 V of the air battery or the nickel metal hydride secondary battery 22.
  • the battery voltage of a lithium ion battery shows the discharge characteristic which falls from about 4.2V to about 2.7V with discharge, since an energy density is higher than an air battery or the nickel hydride secondary battery 22, it is.
  • the device can be driven for a longer time than when an air battery or a nickel hydride secondary battery 22 is used.
  • the speaker device 101 includes a hollow speaker frame 15 and a drive mechanism 11 that is a speaker provided in the speaker frame 15.
  • the speaker frame 15 is formed in a cylindrical shape whose radius is enlarged from the lower surface 15b to the upper surface 15a, and is formed so as to emit sound from the upper surface 15a to the outside.
  • the drive mechanism 11 includes a magnet 111, a yoke 112, a pole piece 113, a voice coil 114, and a diaphragm 16.
  • the magnet 111 is disposed at the center of the speaker frame 15.
  • the magnet 111 is a disk-shaped permanent magnet, and the upper surface 111a and the lower surface 111b are arranged in parallel to the upper surface 15a and the lower surface 15b of the speaker frame 15, respectively.
  • An upper surface 111a and a lower surface 111b of the magnet 111 are an end face of the N pole or an end face of the S pole.
  • the magnet 111 is arranged so that the magnetic pole direction connecting the N pole and the S pole is parallel to the central axis of the speaker frame 15.
  • a disk-shaped pole piece 113 and a ring-shaped voice coil 114 are disposed above the magnet 111.
  • the voice coil 114 is arranged so that the pole piece 113 is positioned on the inner peripheral side.
  • the magnet 111, the pole piece 113, and the voice coil 114 are surrounded by the yoke 112.
  • the yoke 112 includes a cylindrical housing portion 112a having an upper surface opened, and a flange portion 112b projecting in the outer circumferential direction from the upper end peripheral portion of the housing portion 112a.
  • the accommodating part 112a accommodates the magnet 111, the pole piece 113, and the voice coil 114. Further, the flange portion 112b fixes the outer peripheral portion of the diaphragm 16.
  • the diaphragm 16 outputs the kinetic energy generated by the voice coil 114 and the magnet 111 as a sound of air vibration.
  • the speaker device 101 includes a power receiving coil 131 that generates power by wireless power feeding.
  • the power receiving coil 131 is formed in an annular shape, and is arranged so that the housing portion 112a of the yoke 112 is positioned on the inner peripheral side so that the magnet 111 is not easily demagnetized by the magnetic field of the power receiving coil 131.
  • the coil surface parallel to the radial direction of the power receiving coil 131 is set parallel to the upper surface 111a and the lower surface 111b of the magnet 111. That is, the power receiving coil 131 is disposed so as to surround the yoke 112 and the coil surface is orthogonal to the magnetic pole direction connecting the N pole and the S pole of the magnet 111. Thereby, since the N pole surface and the S pole surface of the magnet 111 can be opened, it is possible to easily arrange various components that are operated by a change in the magnetic field in the magnetic pole direction of the magnet 111.
  • the speaker device 101 has a magnetic member 12.
  • the magnetic member 12 is disposed between the power receiving coil 131 and the yoke 112. More specifically, the magnetic member 12 is formed in an annular shape, and is disposed between the power receiving coil 131 and the housing portion 112 a of the yoke 112. As a result, the magnetic field generated when the power receiving coil 131 generates electric power flows through the magnetic member 12 and the magnetic field reaching the yoke 112 is reduced. Therefore, the performance of the yoke 112 due to induction heating by the magnetic field of the power receiving coil 131 is reduced. Decline is prevented.
  • the magnetic member 12 may be formed by combining a plurality of magnetic pieces.
  • a method of combining magnetic pieces magnetic pieces having the same size and shape may be combined, or magnetic pieces having different sizes and shapes may be combined.
  • positioning method of a magnetic piece may provide a clearance gap between adjacent magnetic pieces, and may make magnetic pieces contact.
  • the degree of freedom of the size and shape of the magnetic member 12 can be increased.
  • the magnetic members When the magnetic pieces are brought into contact with each other, the magnetic member 12 having the same performance as the integrally formed magnetic member 12 can be obtained, and the radial size can be freely changed by increasing or decreasing the magnetic pieces. .
  • the coil surface of the power receiving coil 131 is set parallel to the upper surface 111 a and the lower surface 111 b of the magnet 111, so that the coil surface is orthogonal to the magnetic pole direction of the magnet 111.
  • the present invention is not limited to this. That is, the speaker device 101 may be set so that the coil surface intersects the magnetic pole direction of the magnet 111 as shown in FIG.
  • the speaker device 101 further includes a magnet 111 disposed inside the yoke 112, the power receiving coil 131 surrounds the yoke 112, and the coil surface includes the N pole and the S pole of the magnet 111. You may arrange
  • the demagnetizing field due to the receiving coil 131 with respect to the N-pole surface and the S-pole surface of the magnet 111 is reduced, so that demagnetization and demagnetization of the magnet 111 due to the demagnetizing field can be reduced.
  • the mobile device 10 includes a drive device 1 including a power receiving coil 131 to which power is supplied from the outside due to a resonance phenomenon, and a device main body 2 including a secondary battery 22 capable of charging and discharging power.
  • resonance phenomenon means that two or more coils are tuned at the resonance frequency.
  • the portable device 10 configured as described above is charged by the charging device 7.
  • the charging device 7 includes a power supply coil 71 that supplies power to the power reception coil 131 of the mobile device 10 by a resonance phenomenon.
  • the portable device 10 and the charging device 7 constitute a charging system 8 that supplies power (wireless power transmission) from the feeding coil 71 to the receiving coil 131 by a resonance phenomenon.
  • the circuit board 14 is arranged in a magnetic field space formed by a resonance phenomenon so as to have a magnetic field strength smaller than that of other parts.
  • the power receiving coil 131 of the driving device 1 (speaker device 101) has a small magnetic field space at a position inside or near the power receiving coil 131 during power feeding using a resonance phenomenon. It has a configuration in which this space portion is used as a place where the circuit board 14 is arranged.
  • the drive device 1 can be reduced in size as a result of preventing malfunction and heat generation above a predetermined temperature by suppressing the generation of eddy currents caused by the magnetic field in the circuit board 14 disposed in the space portion. It has become. Details of the “space portion with a small magnetic field” will be described later.
  • the power receiving coil 131 includes a power receiving resonator 131a and a power extraction coil 131b.
  • Examples of the types of coils used for the power receiving resonator 131a and the power extraction coil 131b include a spiral type, a solenoid type, and a loop type.
  • the “portable device 10” in the present embodiment includes any device of “handheld (can be held by hand)” and “wearable (can be worn on the body: human body-mounted device)”.
  • the portable device 10 includes a portable computer (laptop, notebook computer, tablet PC, etc.), headset, camera, audio equipment / AV device (portable music player, IC recorder, portable DVD player, etc.), computer, etc.
  • the charging device 7 that charges the mobile device 10 configured as described above includes a power supply coil 71 that supplies power to the power receiving coil 131 of the mobile device 10 by a resonance phenomenon.
  • the feeding coil 71 includes a feeding resonator 71a and a power supply coil 71b. Examples of the types of coils used for the power feeding resonator 71a and the power supply coil 71b include a spiral type, a solenoid type, and a loop type.
  • the charging device 7 includes a power supply unit 72 that supplies AC power to the power supply coil 71 and a control unit 73 that controls the power supply unit 72.
  • the charging device 7 has a charging stand (not shown).
  • the feeding coil 71 included in the charging device 7 and the power receiving coil 131 included in the portable device 10 are arranged to face each other.
  • the charging to the secondary battery 22 is started by wireless power feeding by the magnetic resonance method only by placing the portable device 10 on the charging stand of the charging device 7.
  • the charge to the secondary battery 22 is stopped only by lifting the portable device 10 from the charging stand of the charging device 7.
  • the charging device 7 causes a space portion with a small magnetic field to appear at a position inside or near the feeding coil 71 during power feeding using a resonance phenomenon, and this space portion is controlled by the power supply unit 72 or the control unit. You may have the structure used as the arrangement place of the part 73. FIG. In this case, it is possible to reduce the size of the charging device 7 in addition to the portable device 10.
  • the driving device 1 is configured to form a “space portion with a small magnetic field” at a desired position. Formation of the space portion at a desired position can be realized by setting power supply conditions such as a positional relationship with the charging device 7, a power supply state, and an internal configuration.
  • the driving device 1 when the driving device 1 supplies power to the power receiving resonator 131a from the power feeding resonator 71a of the charging device 7 by a resonance phenomenon, the driving device 1 places this desired position at a desired position between the power feeding resonator 71a and the power receiving resonator 131a.
  • a magnetic field space having a magnetic field strength smaller than the magnetic field strength other than the position may be formed as a “space portion”.
  • the method of forming the “space portion” will be described in detail.
  • power feeding resonance is performed.
  • the method of setting the frequency of the electric power supplied to the feeding resonator 71a so that the direction of the current flowing through the resonator 71a and the direction of the current flowing through the power receiving resonator 131a are opposite to each other is exemplified.
  • the feeding resonator 71a and the power receiving resonator 131a are arranged close to each other, thereby strengthening the coupling between the power feeding resonator 71a and the power receiving resonator 131a.
  • the coupling coefficient representing the height increases.
  • the transmission characteristic “S21” (a value serving as an index of power transmission efficiency when power is transmitted from the power feeding resonator 71a to the power receiving resonator 131a) is measured in such a state where the coupling coefficient is high, the measurement waveform is a low frequency. Peaks are separated on the high frequency side.
  • the frequency of the power supplied to the power supply resonator 71a is set to the frequency near the peak on the high frequency side, the direction of the current flowing through the power supply resonator 71a and the direction of the current flowing through the power reception resonator 131a are reversed.
  • the magnetic field generated on the inner peripheral side of the power feeding resonator 71a and the magnetic field generated on the inner peripheral side of the power receiving resonator 131a cancel each other, so that the power feeding resonator 71a and the power receiving resonator 131a have the inner peripheral side.
  • a magnetic field space having a magnetic field strength smaller than the magnetic field strength other than the inner peripheral side of the power feeding resonator 71a and the power receiving resonator 131a can be formed as a “space portion”.
  • the direction of the current flowing in the power supply resonator 71a and the power reception resonator 131a are supplied.
  • the method of setting the frequency of the electric power supplied to the electric power feeding resonator 71a so that the direction of the electric current which flows may become the same direction is illustrated.
  • the feeding resonator 71a and the power receiving resonator 131a are disposed in proximity to each other, thereby coupling the power feeding resonator 71a and the power receiving resonator 131a.
  • the coupling coefficient representing strength increases.
  • the transmission characteristic is measured in such a state where the coupling coefficient is high, the peak of the measurement waveform is separated into the low frequency side and the high frequency side. Then, by setting the frequency of the power supplied to the power supply resonator 71a to the frequency near the peak on the low frequency side, the direction of the current flowing through the power supply resonator 71a and the direction of the current flowing through the power reception resonator 131a are set.
  • a magnetic field space having a magnetic field strength smaller than the magnetic field strength other than the outer peripheral side of the power feeding resonator 71a and the power receiving resonator 131a can be formed as a “space portion”.
  • the “space portion” is set based on the strength of the magnetic field coupling generated between the power supply resonator 71a and the power reception resonator 131a by changing the adjustment parameters for the power supply resonator 71a and the power reception resonator 131a. May be.
  • the size of the magnetic field space can be expanded by relatively weakening the magnetic field coupling generated between the power feeding resonator 71a and the power receiving resonator 131a.
  • the magnetic field space can be reduced in size by relatively strengthening the magnetic field coupling generated between the power feeding resonator 71a and the power receiving resonator 131a.
  • the “space portion” that is optimal for the size of the mobile device 10 can be formed.
  • the placement relationship of the power feeding resonator 71a and the placement relationship of the power receiving resonator 131a are used as adjustment parameters, and the strength of the magnetic field coupling generated between the power feeding resonator 71a and the power receiving resonator 131a is changed by changing the adjustment parameters.
  • the size of the magnetic field space may be changed by changing.
  • the “space portion” uses the shapes of the power feeding resonator 71a and the power receiving resonator 131a as adjustment parameters, and changes the shape of these coils to a desired shape, and between the power feeding resonator 71a and the power receiving resonator 131a and The shape may be set to a desired shape by changing the strength of magnetic field coupling generated in the periphery. In this case, by making the power feeding resonator 71a and the power receiving resonator 131a have desired shapes, a magnetic field space having a relatively weak magnetic field strength can be formed in a desired shape along the shape of the coil.
  • the “space portion” is an adjustment parameter for at least one of the first distance between the power supply resonator 71a and the power supply coil 71b and the second distance between the power extraction coil 131b and the power reception resonator 131a.
  • the size may be set based on the adjustment parameter. For example, by relatively shortening the first distance between the power supply resonator 71a and the power supply coil 71b and the second distance between the power extraction coil 131b and the power reception resonator 131a, the magnetic field coupling is relatively It can be weakened and the size of the magnetic field space can be enlarged.
  • the magnetic field coupling is relatively The size of the magnetic field space can be reduced.
  • the “space portion” may be formed using the magnetic member 12 or by adding a magnetic member for a magnetic field space.
  • a magnetic member is disposed so as to cover at least a part of the surface excluding the facing surfaces of the power receiving resonator 131a and the power feeding resonator 71a, and a magnetic field is generated between the power feeding resonator 71a and the power receiving resonator 131a.
  • a magnetic field space having a magnetic field strength smaller than the magnetic field strength other than the desired position at a desired position may be formed as a “space portion”.
  • the magnetic member may be disposed so as to cover the inner peripheral surface of the power receiving resonator 131a.
  • the magnetic field generated on the inner peripheral side of the power receiving resonator 131a is cut off, and a magnetic field space having a relatively small magnetic field strength is formed as a “space portion” on the inner peripheral side of the power receiving resonator 131a. Can do.
  • the magnetic member may be arranged so as to cover the surface opposite to the facing surface of the power feeding resonator 71a and the power receiving resonator 131a.
  • the magnetic field generated in the vicinity of the surface opposite to the facing surface of the power receiving resonator 131a is cut off, and a relatively small magnetic field strength is provided in the vicinity of the surface opposite to the facing surface of the power receiving resonator 131a.
  • the magnetic field space can be formed as a “space part”.
  • the driving device 1 of the mobile device 10 generates a magnetic field space having a small magnetic field intensity at a desired position inside or near the power receiving coil 131 based on one or more combinations of the above-described space portion forming methods.
  • ” Can be intentionally formed, and the size and shape of the“ space portion ”can be set. That is, the drive device 1 of the mobile device 10 can form a desired space portion depending on the installation mode of the power receiving coil 131.
  • the portable device 10 configured as described above is a human body-mounted device.
  • the human body-mounted device is a headset
  • the present invention is not limited to this. That is, as a human body wearing device, a device worn on the face, such as a device worn on the ear such as the above-mentioned headset, music player, hearing aid, etc., or a device equipped with a portable computer in eyewear (glasses). And a device worn on an arm like a wristwatch, and a medical device used by being embedded in a human body.
  • the ear-mounted headset 9 includes a headset main body 91 to be attached to the auricle, an ear mold 92 that abuts on or near the opening of the ear hole, and the headset main body 91 and the ear mold 92. And a control board 63 and a secondary battery 22 provided on the headset main body 91.
  • the ear mold 92 includes the speaker device 101 provided with the power receiving coil 131, and can charge the secondary battery 22 using electric power that is wirelessly fed to the power receiving coil 131 by the magnetic field resonance method.
  • the ear-mounted headset 9 does not require the power receiving coil 131 to be disposed on the headset main body 91, and thus has a high degree of design freedom with respect to the size and shape of the headset main body 91.
  • Magnetic field strength distribution As shown in FIG. 11, the magnetic field strength distribution between the receiving coil 131 and the yoke 112 was investigated when the coil surface of the receiving coil 131 was orthogonal to the magnetization direction of the magnet 111. First, the magnetic field strength distribution was analyzed by electromagnetic field analysis for the case of the power receiving coil 131 alone and for the case where the power receiving coil 131 was arranged around the yoke 112.
  • the magnetic field strength distribution was analyzed by electromagnetic field analysis in the case of the power receiving coil 131 alone and in the case where the magnetic member 12 was disposed between the power receiving coil 131 and the yoke 112, respectively. From the analysis result of displaying the magnetic field intensity in color tone, in the case of the power receiving coil 131 alone, a magnetic field having a large intensity exists in the entire periphery of the power receiving coil 131, whereas the magnetic member 12 is between the power receiving coil 131 and the yoke 112. In this case, the magnetic field in the yoke 112 was significantly reduced.
  • the magnetic member 12 when the magnetic member 12 is arranged between the power receiving coil 131 and the yoke 112, the magnetic field around the central axis of the power receiving coil 131 is more than that when only the power receiving coil 131 in FIG. It has become clear that the strength is further reduced and the influence of the magnetic field on the magnet 111 in the yoke 112 can be further reduced.
  • a disk-shaped magnet 111 having a diameter of 7 mm and a thickness of 1 mm, and a yoke 112 having a housing portion having a diameter of 9 mm, a flange portion having a diameter of 14 mm, and a thickness of 4 mm were prepared.
  • a power receiving coil 131 and a power feeding coil 71 having the specifications shown in Table 1 were prepared.
  • the magnet 111 alone is connected to a spring balance and suspended, and the attractive force (g) attracted to the iron plate arranged opposite to the lower position of the magnet 111 is measured with the spring balance (first measurement). 1 embodiment).
  • the magnet 111 is placed in the power receiving coil 131, and the attractive force (g) at which the magnet 111 is attracted to the iron plate when the magnetic resonance type wireless power feeding is performed at a resonance frequency of 1 MHz for a predetermined time is measured with a spring balance. (4th aspect).
  • the magnet 111 is placed in the receiving coil 131 in a state where it is housed in the yoke 112, and the magnet 111 attracts the iron plate when attracted to the iron plate when the magnetic resonance power supply is performed for a predetermined time with a resonance frequency of 1 MHz ( g) was measured with a spring balance, and the yoke temperature was measured (third mode).
  • the magnetic member 12 is further disposed in the power receiving coil 131, and the magnet 111 and the yoke 112 are disposed in the magnetic member 12 while maintaining the state where the magnet 111 is accommodated in the yoke 112. did. Then, the attraction force (g) at which the magnet 111 is attracted to the iron plate when the magnetic resonance type wireless power feeding is performed at a resonance frequency of 1 MHz for a predetermined time is measured with a spring balance, and the yoke temperature is measured (second mode). .
  • the measurement results are shown in Table 2.
  • the first mode to the third mode have an attractive force of 1150 g
  • the fourth mode has an attractive force of 1080 g. Therefore, the coil surface of the power receiving coil 131 is orthogonal to the magnetization direction of the magnet 111.
  • the magnetic field generated by the power receiving coil 131 acts as a demagnetizing field opposite to the magnetic field of the magnet 111, and demagnetization that reduces the magnetic force occurs.
  • the attractive force of the magnet 111 with the coil surface of the power receiving coil 131 parallel to the magnetization direction of the magnet 111 was measured, and the yoke temperature was measured.
  • the magnet 111 alone magnet initial state: fifth mode
  • the magnetic member 12 when the magnetic member 12 is disposed between the power receiving coil 131 and the yoke 112 (magnetic material, yoke and magnet in the coil: (Sixth aspect)
  • when the magnetic member 12 is not disposed between the power receiving coil 131 and the yoke 112 (yoke and magnet in the coil: seventh aspect)
  • the attraction force of the magnet 111 with the coil surface of the power receiving coil 131 parallel to the magnetization direction of the magnet 111 is measured, and the yoke temperature in the sixth mode and the seventh mode is measured. did.
  • Table 3 shows the measurement results.
  • the fifth to eighth aspects have an attractive force of 1150 g, when the coil surface of the power receiving coil 131 is parallel to the magnetization direction of the magnet 111, the magnetic field generated by the power receiving coil 131 is the magnet. It has become clear that demagnetization is prevented because it does not act as a demagnetizing field of 111.
  • the yoke temperature of the sixth aspect is 30 degrees while the yoke temperature of the seventh aspect is 44 degrees, the magnetic field of the power receiving coil 131 passes through the magnetic member 12 and prevents the yoke 112 from being heated. It became clear that Further, from the comparison result between the second mode and the third mode, by making the coil surface of the power receiving coil 131 orthogonal to the magnetization direction of the magnet 111, the yoke temperature is heated more than when the coil surfaces are made parallel. It became clear that it could be reduced.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un dispositif d'entraînement prévu sur un corps d'appareil comportant une batterie secondaire et alimenté en énergie électrique emmagasinée dans la batterie secondaire. Le dispositif d'entraînement selon l'invention comprend : un mécanisme d'entraînement qui fonctionne en utilisant l'énergie électrique emmagasinée dans la batterie secondaire; et un mécanisme de réception d'énergie qui reçoit l'énergie électrique pour charger la batterie secondaire.
PCT/JP2016/066653 2015-06-05 2016-06-03 Dispositif d'entraînement et dispositif portatif équipé de ce dernier WO2016195093A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-114765 2015-06-05
JP2015114765A JP2017005797A (ja) 2015-06-05 2015-06-05 駆動装置及びそれを備えた携帯機器

Publications (1)

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WO2016195093A1 true WO2016195093A1 (fr) 2016-12-08

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011023848A (ja) * 2009-07-14 2011-02-03 Hosiden Corp ヘッドセット
JP2011083078A (ja) * 2009-10-05 2011-04-21 Sony Corp 送電装置、受電装置、および電力伝送システム
JP2013054234A (ja) * 2011-09-05 2013-03-21 Nikon Corp 光学装置、撮像装置、給電装置およびレンズキャップ
JP2014161177A (ja) * 2013-02-20 2014-09-04 Nitto Denko Corp 携帯機器及びその充電機器、携帯機器充電システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011023848A (ja) * 2009-07-14 2011-02-03 Hosiden Corp ヘッドセット
JP2011083078A (ja) * 2009-10-05 2011-04-21 Sony Corp 送電装置、受電装置、および電力伝送システム
JP2013054234A (ja) * 2011-09-05 2013-03-21 Nikon Corp 光学装置、撮像装置、給電装置およびレンズキャップ
JP2014161177A (ja) * 2013-02-20 2014-09-04 Nitto Denko Corp 携帯機器及びその充電機器、携帯機器充電システム

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TW201711343A (zh) 2017-03-16

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