WO2007114385A1 - 振動子の製造方法、振動子、振動アクチュエータ、レンズ鏡筒及びカメラシステム - Google Patents
振動子の製造方法、振動子、振動アクチュエータ、レンズ鏡筒及びカメラシステム Download PDFInfo
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- WO2007114385A1 WO2007114385A1 PCT/JP2007/057263 JP2007057263W WO2007114385A1 WO 2007114385 A1 WO2007114385 A1 WO 2007114385A1 JP 2007057263 W JP2007057263 W JP 2007057263W WO 2007114385 A1 WO2007114385 A1 WO 2007114385A1
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- WIPO (PCT)
- Prior art keywords
- elastic body
- mold
- manufacturing
- vibrator
- electromechanical transducer
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 161
- 230000003534 oscillatory effect Effects 0.000 title abstract 2
- 238000005245 sintering Methods 0.000 claims abstract description 44
- 238000001746 injection moulding Methods 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims description 124
- 239000000463 material Substances 0.000 claims description 53
- 238000006243 chemical reaction Methods 0.000 claims description 31
- 239000000843 powder Substances 0.000 claims description 28
- 238000005304 joining Methods 0.000 claims description 19
- 238000003825 pressing Methods 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 7
- 239000012744 reinforcing agent Substances 0.000 claims description 6
- 230000010287 polarization Effects 0.000 claims description 4
- 230000002463 transducing effect Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 26
- 238000002347 injection Methods 0.000 description 19
- 239000007924 injection Substances 0.000 description 19
- 239000002184 metal Substances 0.000 description 17
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 11
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 11
- 238000002156 mixing Methods 0.000 description 10
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- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000001723 curing Methods 0.000 description 3
- 238000005238 degreasing Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
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- 239000013078 crystal Substances 0.000 description 2
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- 238000005453 pelletization Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/10—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
- H02N2/16—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors using travelling waves, i.e. Rayleigh surface waves
- H02N2/163—Motors with ring stator
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/01—Manufacture or treatment
- H10N30/09—Forming piezoelectric or electrostrictive materials
- H10N30/093—Forming inorganic materials
- H10N30/097—Forming inorganic materials by sintering
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/42—Piezoelectric device making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49005—Acoustic transducer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49007—Indicating transducer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/4908—Acoustic transducer
Definitions
- Vibrator manufacturing method vibrator, vibration actuator, lens barrel, and camera system
- the present invention relates to a method for manufacturing a vibrator, a vibrator, a vibration actuator, a lens barrel, and a camera system.
- Patent Document 1 discloses an ultrasonic actuator in which a base material of a mover is made of a sintered alloy and can withstand use under a high temperature and high humidity in an adverse environment and can be driven for a long time.
- the elastic body and the piezoelectric element are fixed by adhesion in both such an ultrasonic actuator and a general ultrasonic motor.
- the attachment of the elastic body and the piezoelectric element is a very important process in the performance of the motor. If the adhesion state is not stable, the performance of the motor is not stable, and long-term reliability cannot be secured.
- there are various management items such as management of the amount of adhesive and management of curing conditions. If one of them is not stable, the performance of the motor will be affected.
- piezoelectric elements used in ultrasonic motors have a wide variety of processing steps, and the yield is not so good due to the difficulty of the sintering process and machining.
- the elastic body and the piezoelectric element are fixed by bonding.
- the center of the elastic body and the piezoelectric element are The center of the element could be off.
- the outer diameter of the piezoelectric element protrudes outside the outer diameter of the elastic body, it is necessary to grind that part, so cracks may occur in the subsequent process. At times, the yield could be reduced.
- Patent Document 1 JP-A-8-196091
- An object of the present invention is to provide a vibrator manufacturing method, vibrator, vibratory actuator, lens barrel, and camera system that can stabilize adhesiveness and improve yield. Is to provide.
- the invention of claim 1 includes a first step (S201) of disposing the elastic body (12) on the holding member (12A), and an electromechanical transducer (13) on the surface of the elastic body (12) by injection molding.
- the invention of claim 2 includes a first step (S101) in which the electromechanical conversion element (13) is disposed on the holding member (13A), and an elastic body (on the surface of the electromechanical conversion element (13) by injection molding). 12) and a third step of heating and sintering the elastic body (12) and joining the elastic body (12) and the electromechanical transducer (13). (S 105).
- the invention of claim 3 is the method of manufacturing a vibrator according to claim 1 or 2, wherein the elastic step is performed between the second step (S103, S203) and the third step (S105, S205).
- a vibrator manufacturing method comprising: a step (S104, S204) of pressurizing a body (12) and the electromechanical transducer (13).
- the invention of claim 4 includes a first step (S201) for disposing an elastic body (12) on a first mold (12A), and a second mold (13A) on the first mold (12A).
- a second step (S202) of injecting the powder, and a powder material (131) is injected into the second mold (13A), and an electromechanical transducer (13) is placed on the surface of the elastic body (12).
- the elastic body (12) and the electromechanical transducer (13) are removed from the third step (S203) to be formed, the first mold (12A), and the second mold (13A).
- a vibrator comprising: a fourth step (S205) for heating and sintering the electromechanical transducer (13) and joining the elastic body (12) and the electromechanical transducer (13).
- the invention of claim 5 includes a first step (S101) in which the electromechanical transducer (13) is arranged in the first die (13A), and a second die in the first die (13A). (12A) 2nd process to install (S 10 2), a third step of injecting a powder material (121) into the second mold (12A) to form an elastic body (12) on the surface of the electromechanical transducer (13), and The elastic body (12) and the electromechanical transducer (13) are removed from the first mold (13A) and the second mold (12A), and the elastic body (12) is heated and sintered.
- the invention of claim 6 is the method of manufacturing a vibrator according to claim 4 or claim 5, wherein the elastic step is performed between the third step (S103, S203) and the fourth step (S105, S205). Applying pressure between the first mold (12A) and the second mold (13A) so as to pressurize the body (12) and the electromechanical transducer (13) (S104). , S204). A method of manufacturing a vibrator.
- the invention of claim 7 includes a first step (S501) of forming the elastic body (12) on the holding member (12A) by injection molding, and an electromechanical transducer (13) disposed on the surface of the elastic body (12).
- the invention of claim 8 includes a first step (S601) of forming the electromechanical transducer (13) on the holding member (13A) by injection molding, and an elastic body (12) on the surface of the electromechanical transducer (13).
- a second step (S602) for placing the elastic body a third step (S603) for pressurizing the elastic body (12) and the electromechanical transducer (13), and heating the electromechanical transducer (13).
- the invention of claim 9 includes a first step (S501) in which a powder material (121) is injected into a first mold (12A) to form an elastic body (12), and the first mold (12A ) Is removed (12A-1), and the second mold (13A) in which the electromechanical transducer (13) is arranged on the surface of the elastic body (12) of the first mold (12A). ) And the second mold (12A) and the second mold (S502) so as to pressurize the elastic body (12) and the electromechanical transducer (13).
- a third step (S503) for applying pressure between the first mold (12A) and the second step The elastic body (12) and the electromechanical transducer (13) are removed from the mold (13A), the elastic body (12) is heated and sintered, and the elastic body (12) and the electric And a fourth step (S504) for joining the mechanical conversion element (13).
- the invention of claim 10 includes a first step (S601) of injecting a powder material (131) into a first mold (13A) to form an electromechanical transducer (13), and the first mold.
- a part (13A1) of (13A) is removed, and a second mold (12) in which an elastic body (12) is arranged on the surface of the electromechanical transducer (13) of the first mold (13A).
- the invention of claim 11 includes a first step (S301) for forming the elastic body (12) on the holding member (12A) by injection molding, and an electromechanical transducer (12) on the surface of the elastic body (12) by injection molding.
- the invention of claim 12 includes a first step (S401) for forming the electromechanical transducer (13) on the holding member (13A) by injection molding, and the surface of the electromechanical transducer (13) by injection molding.
- the second step (S403) for forming the elastic body (12), the elastic body (12) and the electromechanical transducer (13) are heated and sintered, and the elastic body (12) and the electromechanical conversion element (13) are heated.
- a third step (S405) for joining the electromechanical transducer (13).
- the invention of claim 13 is the method of manufacturing a vibrator according to claim 11 or claim 12, wherein the second step (S303, S403) and the third step (S305, S405)
- a vibrator manufacturing method comprising a step (S304, S404) of pressurizing the dielectric (12) and the electromechanical transducer (13).
- the powder material (121) is injected into the first mold (12A), and the elastic body (12 ) And a part (12A-1) of the first mold (12A) is removed, and the second mold (13A) is added to the first mold (12A).
- the elastic body (12) and the electromechanical transducer (13) are removed from the third step (S303) to be formed, the first mold (12A), and the second mold (13A).
- the fourth step (S) in which the elastic body (12) and the electromechanical transducer (13) are heated and sintered to join the elastic body (12) and the electromechanical transducer (13). 305).
- the invention of claim 15 includes a first step (S401) of injecting a powder material (131) into a first mold (13A) to form an electromechanical transducer (13), and the first mold (13A) part (13A 1) is removed, the second mold (12A) is installed in the first mold (13A) second step (S402), the second mold ( A powder material (121) is injected into 12A) to form an elastic body (12) on the surface of the electromechanical transducer element (13) (S403); and the first mold (13A) And the second metal mold (12A), the elastic body (12) and the electromechanical transducer (13) are removed, and the elastic body (12) and the electromechanical transducer (13) are heated. And a fourth step (S405) in which the elastic body (12) and the electromechanical transducer (13) are joined together.
- the invention of claim 16 is the method of manufacturing a vibrator according to claim 14 or claim 15, wherein the third step (S303, S403) and the fourth step (S305, S405) A step of applying pressure between the first mold (12A) and the second mold (13A) so as to pressurize the dielectric (12) and the electromechanical transducer (13) ( S304, S404) is provided.
- the invention of claim 17 is a method of manufacturing a vibrator comprising a vibrator (11) comprising an elastic body (12) and an electromechanical transducer (13), wherein the elastic body (12) and the electric machine A holding step (# 300) for holding the conversion element (13) together; and the elastic body (12) and the electromechanical conversion element (13) held by the holding step (# 300) And a heating and sintering step (# 401) for heating and sintering the vibrator.
- the invention of claim 18 is the method of manufacturing a vibrator according to claim 17, wherein the elastic A vibrator manufacturing method comprising: a molding step (# 204, # 504, # 704, # 804) for molding at least one of a body (12) and the electromechanical transducer (13). is there.
- the invention of claim 19 is a method for manufacturing a vibrator according to claim 17, further comprising a comb-teeth forming step of forming comb teeth on the elastic body (12). It is.
- a vibrator manufacturing method according to any one of the seventeenth to nineteenth aspects, wherein the elastic body (12) and the electromechanical transducer (13) A method for manufacturing a vibrator, comprising: a reinforcing agent adding step of adding a reinforcing agent (19) that reinforces the binding force.
- the invention of claim 21 is the method of manufacturing a vibrator according to any one of claims 17 to 20, wherein the sintering temperature in the heat sintering step (# 401) is 1000-1200 ° C. This is a method for manufacturing a vibrator.
- the invention of claim 22 is the method of manufacturing a vibrator according to any one of claims 17 to 21, wherein an electrode forming step (# 402) of forming an electrode on the electromechanical transducer (13) is performed. Is provided.) Is a method for manufacturing a vibrator.
- the invention of claim 23 is directed to a polarization step (# 403) for polarizing the electromechanical transducer (13) over the method for manufacturing a vibrator according to any one of claims 17 to 22. It is a manufacturing method of the vibrator characterized by providing.
- the invention of claim 24 is directed to a vibrator (11) manufactured by the vibrator manufacturing method according to any one of claims 1 to 23 and a relative drive driven by the vibrator (11). And a vibration actuator (10) comprising a moving member (14).
- the invention of claim 25 is a lens barrel (3) comprising the vibration actuator (10) according to claim 24.
- the invention of claim 26 is a camera system (1) provided with the vibration actuator (10) of claim 24.
- FIG. 1 is a process diagram showing a method for manufacturing a vibrator according to Example 1.
- FIG. 2 is a diagram showing a vibrator manufactured by the vibrator manufacturing method according to Embodiment 1.
- FIG. 2 is a diagram showing a vibrator manufactured by the vibrator manufacturing method according to Embodiment 1.
- FIG. 3 is a diagram showing an ultrasonic motor of Example 1.
- FIG. 4 is a diagram showing a camera system of Example 1.
- FIG. 5 is a process diagram showing a method of manufacturing a vibrator according to Example 2.
- FIG. 6 is a process diagram showing a method of manufacturing a vibrator according to Example 3.
- FIG. 7 is a view showing a modification of the vibrator.
- FIG. 8 is a schematic view showing a method for manufacturing a vibrator according to Example 1.
- FIG. 9 is a schematic view showing a method for manufacturing a vibrator according to Example 2.
- FIG. 10 is a schematic view showing a method for manufacturing a vibrator according to Example 3.
- FIG. 11 is a process diagram showing a method of manufacturing a vibrator according to Example 4.
- FIG. 12 is a schematic diagram showing a method for manufacturing a vibrator according to Example 4.
- FIG. 13 is a process diagram showing a method of manufacturing a vibrator according to Example 5.
- FIG. 14 is a schematic view showing a method for manufacturing a vibrator according to Example 5.
- FIG. 15 is a process diagram showing a method of manufacturing a vibrator according to Example 6.
- FIG. 16 is a schematic view showing a method for manufacturing a vibrator according to Example 6.
- FIG. 1 is a process diagram showing a method for manufacturing a vibrator according to the first embodiment.
- FIG. 2 is a diagram showing a vibrator manufactured by the method for manufacturing a vibrator according to the first embodiment.
- 8 is a schematic diagram showing a method for manufacturing a vibrator according to Example 1.
- the manufacturing method of the first embodiment is a method of manufacturing a vibrator 11 including an elastic body 12 and a piezoelectric element 13, and includes a piezoelectric element manufacturing process # 100 and an elastic body manufacturing process # 2.
- Example 1 a resonator 11 manufactured by the manufacturing method of Example 1 will be described.
- the vibrator 11 includes an elastic body 12 and a piezoelectric element 13.
- the elastic body 12 is a metal material that can be elastically deformed, and has a ring shape.
- a comb-shaped groove 12a is formed on the opposite surface of the elastic body 12 to which the piezoelectric element 13 is bonded, and the tip surface of the protrusion 12b (where the groove 12a is not provided) serves as the drive surface 12c.
- the driving surface 12c is brought into pressure contact with the moving element.
- the reason for forming the groove 12a is to amplify the amplitude of the traveling wave generated on the drive surface 12c.
- the elastic body 12 is, for example, SUS, brass or the like.
- the piezoelectric element 13 is an electromechanical conversion element that is bonded to the surface of the elastic body 12 opposite to the groove 12a and converts electrical energy into mechanical energy, and is excited by a drive signal such as an AC voltage. Then, vibration is generated in the elastic body 12, and a traveling wave is generated in the drive surface 12c.
- the piezoelectric element 13 is, for example, PZT (lead zirconate titanate), ceramics, or the like.
- the piezoelectric element 13 may be an electrostrictive element or a magnetostrictive element.
- Example 1 Next, a method for manufacturing a vibrator according to Example 1 will be described.
- the piezoelectric element manufacturing process # 100 consists of the material confirmation process # 101, the material weighing process # 102, the material mixing process # 103, the pre-sintering process # 104, and the grinding process # 105. And a granulation process # 106 and a molding process # 107.
- PZT is used as the material of the piezoelectric element 13.
- Material confirmation step # 101 is a step of confirming the material of PZT. For example, using a fluorescent X-ray apparatus, it is confirmed whether the purity of PZT is 99.90% or more.
- the material weighing step # 102 is a step of measuring the weight of the PZT raw material. For example, using a precision balance, check whether the weight of the PZT raw material is less than a predetermined target value error of 0.1 lg or less. .
- the raw material of PZT and a predetermined material necessary for sintering are mixed, and for example, they are mixed for a predetermined time using a ball mill. Then, use a particle size distribution analyzer to check if the particle size of the mixture is 1-2 ⁇ m.
- Presintering step # 104 is a step of presintering the mixture.
- the temperature profile (setting) is from 850 ° C to ⁇ 5 ° C. Pre-sintering while confirming that it is in the range.
- the pulverization step # 105 is a step of pulverizing the pre-sintered material, and for example, pulverization is performed for a predetermined time using a ball mill. Then, use a particle size distribution meter to check whether the particle size of the pulverized product is 1 to 2 m. In addition, using an X-ray analyzer, the ratio of PZT is confirmed from the crystal phase of PZT, and whether the specific surface area is a predetermined value.
- the granulation process # 106 is a process in which the powder of the pulverized product is hardened and granulated.
- the pulverized product is dried and granulated with PVA (polybulal alcohol) as a binder. I do.
- PVA polybulal alcohol
- SEM electrospray microscope
- Forming step # 107 is a step of forming a granulated granulated product, and for example, press forming while confirming whether the pressure value is lt / cm 2 using a press.
- the piezoelectric element 13 an existing element may be used.
- the piezoelectric element 13 manufactured in this way is placed in a die 13A for the piezoelectric element (see FIG. 8, S101).
- an elastic die 12A is installed on the piezoelectric element die 13A (see FIG. 8, S102).
- the manufacturing process # 200 of the elastic body is performed by injection-molding and sintering metal powder.
- This is a process for manufacturing the elastic body 12 by the metal injection mold manufacturing method, and comprises a material confirmation process # 201, a binder mixing process # 202, a pellets tough process # 203, and an injection molding process # 204.
- SUS304 is used as the material of the elastic body 12.
- the material confirmation step # 201 is a step of confirming the material of SUS. For example, using a particle size distribution meter, it is confirmed whether the particle diameter of SUS is about 5 ⁇ m in average particle diameter.
- the Noinder mixing step # 202 is a step of mixing the SUS material powder and the resin binder. For example, using a precision balance, it is confirmed whether the total weight of the mixture is equal to or less than the target value error lg.
- the peret toy koji step # 203 is a step of pelletizing (solidifying the mixture), for example, using a pellet molding machine.
- Injection molding process # 204 is a process of injection-molding the pelletized mixture.
- the temperature is 160 to 170 ° C.
- the holding pressure is a predetermined value. Or while confirming whether the pressure holding time is a predetermined value.
- a mold is used for injection molding, and the piezoelectric element 13 manufactured by the above-described method is arranged in advance in the mold (see FIG. 8, S101, S102), and the mold is used.
- the mixture (powder material) 121 (12) that has been pelletized on top is injection molded to integrate the elastic body 12 and the piezoelectric element 13 (see FIG. 8, S103).
- the elastic mold 12A to be used is provided with a shape 12B corresponding to the comb teeth, and the shape of the comb teeth is formed by injection molding.
- a degreasing step for removing the unnecessary resin binder. For example, degreasing is performed by a thermal decomposition method or the like.
- the holding step # 300 is a step of holding the elastic body 12 and the piezoelectric element 13 together.
- pressure is applied between the elastic body mold 12A and the piezoelectric element mold 13A so as to pressurize the elastic body 12 and the piezoelectric element 13 (see FIG. 8, S104).
- the pressure value is preferably about 0.5 tZcm 2 . If the elastic body 12 and the piezoelectric element 13 are sufficiently pressurized at the time of injection (if the pressurization force is about 0.5 tZcm 2 ), the injection molding process # 104 may also serve as this process. Therefore, this step may be omitted.
- Process # 400 after holding includes heating and sintering process # 401, electrode printing process # 402, About # 403 is provided.
- the heating and sintering step # 401 is a step of heating and sintering the elastic body 12 and the piezoelectric element 13 held by the holding step # 300, and the sintering temperature of the heating and sintering step is 1000-1200 ° C. It is preferable that Specifically, the elastic body 12 and the piezoelectric element 13 are removed from the elastic body mold 12A and the piezoelectric element mold 13A, the elastic body 12 is heated and sintered, and the elastic body 12 and the piezoelectric element 13 are piezoelectric. The element 13 is joined (see FIG. 8, S105). The heating and sintering step # 401 is performed while confirming whether the temperature profile is in the range of 1100 ° C.
- the elastic body that has become a mixture becomes the elastic body 12 as a sintered body and is completely joined to the piezoelectric element 13.
- the electrode printing step # 402 is a step of printing an electrode on the piezoelectric element 13, and prints the electrode using, for example, a screen printer. And confirm whether the film thickness of the electrode is 2-5 m using SEM.
- the polarization step # 403 is a step of polarizing the piezoelectric element 13 and, for example, uses a predetermined power source so that the voltage becomes 25 KVZcm 2 . In addition, strain the temperature to 100 ° C using a thermometer, and apply voltage for 30 minutes using a timer. It is to be noted that the polarization needs to be performed by sandwiching the piezoelectric element 13 between the + electrode and the one electrode. A printed electrode is used for one electrode, and an elastic body 12 is used for the other electrode.
- the elastic body 12 is manufactured by the metal injection mold manufacturing method, integrated with the piezoelectric element 13 at the time of injection molding, and completely bonded to the piezoelectric element 13 at the time of heat sintering. Therefore, the conventional bonding process can be abolished, the assembly time can be greatly shortened, and the quality can be stabilized.
- the comb teeth of the elastic body 12 are formed using a mold, machining is not required, and the yield is improved. However, since the comb teeth can be formed within the joining process (injection molding process # 204), the number of manufacturing steps can be greatly reduced.
- the management items of the metal injection mold manufacturing method are: (1) mixing ratio of material and resin binder, (2) mixing time, (3) injection pressure, (4) pressure holding time, (5) degreasing Temperature 'time (6) Although it is necessary to manage the sintering temperature and time, etc., these conditions have been established by general plastic mold manufacturing methods and can be handled with equivalent management. Compared with the bonding process, the management items can be simplified.
- the process of bonding the elastic body and the piezoelectric element includes (1) component cleaning and drying, (2) adhesive application, (3) setting on a fixing jig, (4 There are two processes: (1) heat curing, (5) removal from the fixture.
- management items in the process are the force that makes the above contents.
- (1) Adhesive storage temperature, (2) Adhesive storage period, (3) Tool maintenance, etc. Such a wide range of management is required.
- Example 1 the manufacturing method of Example 1 can be completely joined by heat-sintering the elastic body and the piezoelectric element assembled together by the metal injection mold manufacturing method. It is possible to eliminate the management items.
- FIG. 3 is a diagram illustrating the ultrasonic motor according to the first embodiment.
- an ultrasonic motor that uses an ultrasonic vibration region as a vibration actuator will be described as an example.
- the ultrasonic motor 10 includes a vibrator 11, a moving body 14, a buffer member 15, supports 16A and 16B, a buffer member 17, a pressure unit 18, and the like.
- the vibrator 11 is manufactured by the manufacturing method described above, and includes an elastic body 12 and a piezoelectric element 13.
- the moving body 14 has a substantially annular shape, and is a member that is pressed against the elastic body 12 by a pressurizing unit 18 to be described later and is frictionally driven by a traveling wave generated on the drive surface of the elastic body 12 of the vibrator 11. It is.
- the buffer member 15 is formed in a substantially annular shape by rubber or the like, and is a member that prevents the vibration of the moving body 14 from being transmitted to the supporting body 16A side. Between them.
- the support 16A is a member that supports the moving body 14.
- the support 16A and the moving body 14 are It is a member that is engaged so as to rotate integrally by an engaging portion (not shown), and that transmits the rotational motion of the moving body 14 to a driven member (not shown).
- the pressurizing unit 18 is a part that pressurizes the vibrator 11 and the moving body 14, and includes a pressurizing plate 18a, a dish panel 18b, and the like.
- the pressure plate 18a is a plate that receives the pressure generated by the pan panel 18b.
- the buffer member 17 is formed of a nonwoven fabric or felt, and is a member that prevents the vibration of the vibrator 11 from being transmitted through the pressurizing portion 18, and is provided between the piezoelectric element 13 and the pressurizing plate 18 a.
- the support 16B is a member that fixes the ultrasonic motor 10 to, for example, a lens barrel of a camera.
- the vibrator 11 having a stable quality is provided, the motor performance is stable and long-term reliability can be ensured.
- FIG. 4 is a diagram illustrating the camera system according to the first embodiment.
- a camera system 1 includes a camera body 2 having an image sensor 6 and a lens barrel 3.
- the lens barrel 3 is an interchangeable lens that can be attached to and detached from the camera body 2.
- the force shown in the example in which the lens barrel 3 is an interchangeable lens is not limited thereto, and may be a lens barrel integrated with the camera body, for example.
- the lens barrel 3 includes a lens 4, a cam barrel 5, the ultrasonic motor 10 described above, and the like.
- the ultrasonic motor 10 is used as a driving source for driving the lens 4 during the focusing operation of the camera system 1, and the driving force obtained from the ultrasonic motor 10 is transmitted to the cam cylinder 5.
- the lens 4 is cam-engaged with the cam cylinder 5, and when the cam cylinder 5 is rotated by the driving force of the ultrasonic motor 10, the lens 4 is moved in the optical axis direction by the cam engagement with the cam cylinder 5. To adjust the focus.
- the ultrasonic motor 10 that can stabilize the motor performance and secure long-term reliability is provided, it has excellent functionality and durability. Camera system can be provided.
- FIG. 5 is a process diagram illustrating a method for manufacturing a vibrator according to the second embodiment.
- FIG. 9 is a schematic diagram illustrating a method for manufacturing the vibrator according to the second embodiment. It should be noted that a duplicate description of a part that performs the same function as that of the first embodiment is omitted as appropriate.
- the piezoelectric element 13 is formed rather than the elastic body 12 formed by the metal injection molding method as in the manufacturing method of Example 1.
- the elastic body 12 is an existing one.
- the manufacturing method of the second embodiment includes an elastic body manufacturing process # 600, a piezoelectric element manufacturing process # 500, a holding process # 300, and a post-holding process # 400.
- the elastic body manufacturing process # 600 includes a preparation process # 601 for preparing an existing elastic body.
- the elastic body 12 is disposed on the elastic body mold 12A (see FIG. 9, S201), and the piezoelectric element mold 13A is disposed on the elastic body mold 12A (FIG. 9, (See S202).
- the piezoelectric element manufacturing process # 500 includes a material confirmation process # 501, a binder mixing process # 502, a pellets bowl process # 503, and an injection molding process # 504.
- the specific content of each process is the same as that of the elastic body manufacturing process # 200 (# 201 to # 204; see FIG. 1) in Example 1, and the material used is changed from SUS304 to PZT.
- the powder material 131 (13) is injected into the piezoelectric element mold 13A to form the piezoelectric element 13 on the surface of the elastic body 12 (see S203 in FIG. 9).
- the holding step # 300 and the post-holding step # 400 are the same steps as in the first embodiment.
- pressure is applied between the elastic die 12A and the piezoelectric die 13A so as to pressurize the elastic body 12 and the piezoelectric element 13 (see FIG. 9, S204). ).
- the injection molding step # 504 can also serve as this step, so this step may be omitted.
- the elastic body 12 and the piezoelectric element 13 are removed from the elastic body mold 12A and the piezoelectric element mold 13A, and the piezoelectric element 13 is heated and sintered. 12 and the piezoelectric element 13 are joined (see FIG. 9, S205).
- Piezoelectric element 13 has a low yield during machining due to the property of being easily broken.
- piezoelectric element 13 was manufactured by a metal injection mold manufacturing method, and an elastic body was formed during injection molding. 12 and elastic body when heated and sintered 1 2 can be completely joined to each other, so that the machining of the piezoelectric element 13 is not necessary, and the yield can be improved.
- FIG. 6 is a process diagram illustrating a method for manufacturing a vibrator according to the third embodiment.
- FIG. 10 is a schematic diagram illustrating a method for manufacturing the vibrator according to the third embodiment.
- the manufacturing method of Example 3 is a method for manufacturing both the elastic body 12 and the piezoelectric element 13 by a metal injection mold manufacturing method, and is a type in which the elastic body 12 is injected first.
- the manufacturing method of Example 3 includes an elastic body manufacturing process # 700, a piezoelectric element manufacturing process # 800, a holding process # 300, and a post-holding process # 400.
- Example 1 The specific contents of each process are the same as those in Example 1 and Example 2 (# 700 is the same as # 200 in Fig. 1 and # 800 is the same as # 500 in Fig. 5 ).
- the elastic body 12 and the piezoelectric element 13 are formed using a mold.
- the elastic body material is injected into a mold to mold the elastic body.
- the piezoelectric element material is further injected into the mold to mold the piezoelectric element. Then, by performing the holding step # 300 and the post-holding step # 400, the elastic body 12 and the piezoelectric element 13 as both material force sintered bodies are formed and are completely joined.
- the powder material 121 (12) is injected into the elastic body mold 12A to form the elastic body 12 (see S301 in FIG. 10).
- the powder material 131 (13) is injected into the piezoelectric element mold 13A to form the piezoelectric element 13 on the surface of the elastic body 12 (see S303 in FIG. 10).
- the holding step # 300 pressure is applied between the elastic die 12A and the piezoelectric element die 13A so as to pressurize the elastic body 12 and the piezoelectric element 13 (FIG. 10, S304). reference). Note that if the elastic body 12 and the piezoelectric element 13 are sufficiently pressurized at the time of injection, the injection molding step # 804 can also serve as this step, so this step may be omitted. Finally, the elastic body 12 and the piezoelectric element are formed from the elastic body mold 12A and the piezoelectric element mold 13A. The elastic body 12 and the piezoelectric element 13 are heated and sintered, and the elastic body 12 and the piezoelectric element 13 are joined (see FIG. 10, S305).
- the elastic body 12 and the piezoelectric element 13 are integrally formed in the mold by the metal injection mold manufacturing method.
- a completely concentric vibrator 11 in which the core and the center of the piezoelectric element 13 are not displaced can be manufactured.
- the vibrator manufactured by the manufacturing method of Example 3 is incorporated into an ultrasonic motor, the motor performance can be further stabilized. If the ultrasonic motor is incorporated into a lens barrel or camera system, functionality and durability can be improved. The sex can be further improved.
- FIG. 11 is a process diagram illustrating a method for manufacturing a vibrator according to the fourth embodiment.
- FIG. 12 is a schematic diagram illustrating a method for manufacturing the vibrator according to the fourth embodiment.
- the manufacturing method of Example 4 is a method in which both the elastic body 12 and the piezoelectric element 13 are manufactured by a metal injection mold manufacturing method, and the piezoelectric element 13 is first injected.
- the manufacturing method of Example 4 includes a piezoelectric element manufacturing process # 900, an elastic body manufacturing process # 100, a holding process # 300, and a post-holding process # 400.
- Example 1 The specific contents of each process are the same as those in Example 1 and Example 2 (# 900 is the same as # 500 in Fig. 5 and # 1000 is the same as # 200 in Fig. 1. ).
- the elastic body 12 and the piezoelectric element 13 are formed using a mold.
- the piezoelectric element material is injected into a mold to form the piezoelectric element.
- an elastic material is further injected into the mold to form the elastic body.
- the elastic body and the piezoelectric element integrated with each other are taken out, and the holding process # 30 0 and the post-holding process # 400 are performed, so that both materials are elastic bodies 12 and piezoelectric elements 13 as sintered bodies. And is completely joined.
- the powder material 131 (13) is injected into the piezoelectric element mold 13A to form the piezoelectric element 13 (see FIG. 12, S401).
- the powder material 121 (12) is injected into the elastic body mold 12A, and the elastic body 12 is formed on the surface of the piezoelectric element 13 (see FIG. 12, S403).
- the holding step # 300 pressure is applied between the elastic die 12A and the piezoelectric die 13A so as to pressurize the elastic body 12 and the piezoelectric element 13 (FIG. 12, S404). reference). If the elastic body 12 and the piezoelectric element 13 are sufficiently pressurized at the time of injection, the injection molding step # 1004 can also serve as this step, and this step may be omitted. Finally, the elastic body 12 and the piezoelectric element 13 are removed from the elastic body mold 12A and the piezoelectric element mold 13A, and the elastic body 12 and the piezoelectric element 13 are heated and sintered to be elastic. The body 12 and the piezoelectric element 13 are joined (see FIG. 12, S405).
- the elastic body 12 and the piezoelectric element 13 are integrally formed in the mold by the metal injection mold manufacturing method.
- a completely concentric vibrator 11 in which the core and the center of the piezoelectric element 13 are not displaced can be manufactured.
- the vibrator manufactured by the manufacturing method of Example 3 is incorporated into an ultrasonic motor, the motor performance can be further stabilized. If the ultrasonic motor is incorporated into a lens barrel or camera system, functionality and durability can be improved. The sex can be further improved.
- FIG. 13 is a process diagram illustrating a method for manufacturing a vibrator according to the fifth embodiment.
- FIG. 14 is a schematic diagram illustrating a method for manufacturing the vibrator according to the fifth embodiment.
- the manufacturing method of Example 5 is a method of manufacturing the elastic body 12 by a metal injection mold manufacturing method.
- the manufacturing method of the fifth embodiment includes an elastic body manufacturing process # 1100, a piezoelectric element manufacturing process # 1200, a holding process # 300, and a post-holding process # 400.
- the elastic body manufacturing process # 1100 includes a material confirmation process # 1101, a Noinder mixing process # 1102, a Peretto candy process # 1103, and an injection molding process # 1104.
- the specific content of each process is the same as that of the elastic body manufacturing process # 200 (# 201 to # 204; see FIG. 1) in the first embodiment.
- the injection molding step # 1104 the powder material 121 (12) is injected into the elastic body mold 12A to form the elastic body 12 (see FIG. 14, S501).
- the piezoelectric element manufacturing process # 1200 includes an installation process # 1201 for installing an existing piezoelectric element.
- installation process # 1201 part 12A-1 of mold 12A for elastic body is removed, and mold for piezoelectric element in which piezoelectric element 13 is arranged on the surface of elastic body 12 of mold 12A for elastic body.
- Install mold 13A see Figure 14, S502.
- the holding step # 300 and the post-holding step # 400 are the same steps as in the first embodiment.
- pressure is applied between the elastic die 12A and the piezoelectric die 13A so as to pressurize the elastic body 12 and the piezoelectric element 13 (see FIG. 14, S503).
- the heating and sintering step # 401 the elastic body 12 and the piezoelectric element 13 are removed from the elastic body mold 12A and the piezoelectric element mold 13A, and the elastic body 12 is heated and sintered. And the piezoelectric element 13 are joined (see FIG. 14, S504).
- the elastic body 12 is manufactured by the metal injection mold manufacturing method and bonded to the piezoelectric element 13 at the time of heating and sintering, so the conventional bonding process is abolished.
- Embodiment 6 can greatly reduce the assembly time and stabilize the quality.
- FIG. 15 is a process diagram illustrating a method for manufacturing a vibrator according to the sixth embodiment.
- FIG. 16 is a schematic diagram illustrating a method for manufacturing the vibrator according to the sixth embodiment.
- the manufacturing method of Example 6 is a method in which the piezoelectric element 13 is first manufactured by a metal injection mold manufacturing method and then bonded to the existing elastic body 12.
- the manufacturing method of Example 6 includes a piezoelectric element manufacturing process # 1300, an elastic body manufacturing process # 1400, a holding process # 300, and a post-holding process # 400.
- the piezoelectric element manufacturing process # 1300 includes a material confirmation process # 1301, a noinder mixing process # 1302, a pelletizing process # 1303, and an injection molding process # 1304.
- the specific content of each process is the same as that of the elastic body manufacturing process # 500 (# 501 to # 504; see FIG. 5) in the second embodiment.
- the injection molding step # 1304 the powder material 131 (13) is injected into the piezoelectric element mold 13A to form the piezoelectric element 13 (see FIG. 16, S601).
- the elastic body manufacturing process # 1400 includes an installation process # 1401 for installing an existing elastic body.
- installation step # 1401 part 13A-1 of the piezoelectric element mold 13A is removed, and the elastic body mold 12A is placed on the surface of the piezoelectric element 13 of the piezoelectric element mold 13A.
- Install 12A see Fig. 16, S602.
- the holding step # 300 and the post-holding step # 400 are the same steps as in the first embodiment.
- pressure is applied between the elastic die 12A and the piezoelectric die 13A so as to pressurize the elastic body 12 and the piezoelectric element 13 (see FIG. 16, S603).
- the heating and sintering process # 401 the elastic body mold 12A, the piezoelectric element mold 13A, the force elastic body 12 and the piezoelectric element 13 are removed, the piezoelectric element 13 is heated and sintered, and the elastic body 1 2 and the piezoelectric element 13 are joined (see FIG. 16, S604).
- the piezoelectric element 13 is manufactured by the metal injection mold manufacturing method and bonded to the elastic body 12 at the time of heating and sintering, so the conventional bonding process is abolished. Can greatly reduce the assembly time and stabilize the quality.
- FIG. 7 is a diagram showing a modification of the vibrator.
- a reinforcing agent adding step for adding a reinforcing agent that reinforces the bonding force between the elastic body 12 and the piezoelectric element 13 may be provided in the process of the method for manufacturing the vibrator 11.
- the elastic body 12 and the piezoelectric element 13 are bonded to each other only when the anchoring effect is required.
- a thermosetting adhesive sheet 19 can be attached and cured at the same time as sintering. Further, instead of the adhesive sheet 19, a sheet containing a sintering auxiliary material such as boron oxide (BO) or alumina (Al 2 O 3) may be attached.
- the elastic body piezoelectric element has been described in the example of molding by a metal instruction mold manufacturing method, the elastic body may be molded by applying pressure to a mixture of a piezoelectric element material and a binder. Good.
- the vibration actuator has been described as an example of using it as an autofocus drive source, the drive source of the image stabilization mechanism that corrects camera shake by driving a part of the imaging system of the camera system and the drive of the copier It can be applied to a steering wheel tilt device of an automobile, a driving device of a watch, and the like.
- the vibration actuator may be the force described in the example of the ring type actuator, for example, a rod type actuator, a pencil type actuator, a disk type actuator, or the like.
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Lens Barrels (AREA)
- Ceramic Products (AREA)
Abstract
Description
Claims
Priority Applications (2)
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US12/295,906 US8555483B2 (en) | 2006-04-04 | 2007-03-30 | Method of manufacturing a vibrating element |
JP2008508685A JP5187190B2 (ja) | 2006-04-04 | 2007-03-30 | 振動子の製造方法、振動子、振動アクチュエータ、レンズ鏡筒及びカメラシステム |
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JP2006102716 | 2006-04-04 | ||
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JP2009201322A (ja) * | 2008-02-25 | 2009-09-03 | Nikon Corp | 振動アクチュエータ、レンズ鏡筒、カメラ、振動アクチュエータの製造方法 |
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JP5631018B2 (ja) * | 2009-04-07 | 2014-11-26 | キヤノン株式会社 | 回転型振動波駆動装置 |
KR20160060999A (ko) * | 2014-11-21 | 2016-05-31 | 삼성전기주식회사 | 압전 액추에이터 및 렌즈 모듈 |
Citations (3)
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JPS63209477A (ja) * | 1987-02-24 | 1988-08-31 | Canon Inc | 進行波型超音波モ−タのステ−タおよびその製作方法 |
JPH01107677A (ja) * | 1987-10-19 | 1989-04-25 | Inoue Japax Res Inc | 超音波パルスモータ |
JPH07241091A (ja) * | 1994-02-28 | 1995-09-12 | Mitsubishi Materials Corp | 進行波型超音波モータとその製造方法 |
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US5322580A (en) * | 1992-04-24 | 1994-06-21 | United Technologies Corporation | Bonding of thermoset composite structures to metal structures |
JP3313900B2 (ja) * | 1993-08-31 | 2002-08-12 | キヤノン株式会社 | プロセスカートリッジのフレーム及びプロセスカートリッジ及び電子写真画像形成装置 |
JP3358265B2 (ja) * | 1993-12-17 | 2002-12-16 | 株式会社ニコン | 超音波モータ |
JP3484794B2 (ja) | 1995-01-13 | 2004-01-06 | 株式会社ニコン | 超音波アクチュエータ |
JPH09223825A (ja) * | 1996-02-19 | 1997-08-26 | Nikon Corp | 圧電応用素子 |
US5955819A (en) * | 1996-05-15 | 1999-09-21 | Canon Kabushiki Kaisha | Standing-wave vibration motor |
-
2007
- 2007-03-30 JP JP2008508685A patent/JP5187190B2/ja not_active Expired - Fee Related
- 2007-03-30 US US12/295,906 patent/US8555483B2/en not_active Expired - Fee Related
- 2007-03-30 WO PCT/JP2007/057263 patent/WO2007114385A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS63209477A (ja) * | 1987-02-24 | 1988-08-31 | Canon Inc | 進行波型超音波モ−タのステ−タおよびその製作方法 |
JPH01107677A (ja) * | 1987-10-19 | 1989-04-25 | Inoue Japax Res Inc | 超音波パルスモータ |
JPH07241091A (ja) * | 1994-02-28 | 1995-09-12 | Mitsubishi Materials Corp | 進行波型超音波モータとその製造方法 |
Cited By (1)
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JP2009201322A (ja) * | 2008-02-25 | 2009-09-03 | Nikon Corp | 振動アクチュエータ、レンズ鏡筒、カメラ、振動アクチュエータの製造方法 |
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US20090237818A1 (en) | 2009-09-24 |
US8555483B2 (en) | 2013-10-15 |
JPWO2007114385A1 (ja) | 2009-08-20 |
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