Eliptical Motion At Fixed Point (i.e., Walking) Or Ratchet And Pawl Motor Patents (Class 310/323.16)
  • Patent number: 11205977
    Abstract: A power generating element according to the present invention includes: a support frame formed in a frame shape in plan view; a vibrating body provided inside the support frame; a first bridge portion and a second bridge portion that supports the vibrating body on the support frame; and a charge generating element to generate a charge at the time of displacement of the vibrating body. The support frame includes a first frame portion arranged on a first side with respect to the vibrating body and includes a second frame portion arranged on a second side opposite to the first side with respect to the vibrating body. The first bridge portion couples the vibrating body with the first frame portion. The second bridge portion couples the vibrating body with the second frame portion.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: December 21, 2021
    Assignee: TRI-FORCE MANAGEMENT CORPORATION
    Inventors: Kazuhiro Okada, Miho Okada, Satoshi Era
  • Patent number: 11205975
    Abstract: A piezoelectric drive device for vibrating a vibrating body to make a tip of a protruding part make a rotational motion of drawing an elliptic orbit to thereby drive a driven member, wherein the vibrating body includes a substrate, a driving piezoelectric element configured to vibrate the substrate, and a detecting piezoelectric element configured to detect a vibration of the substrate, the driving piezoelectric element includes a first driving piezoelectric element for making the vibrating body perform a stretching vibration in a first direction, and a second driving piezoelectric element for making the vibrating body perform a flexural vibration in a second direction perpendicular to the first direction, the detecting piezoelectric element is arranged with the first driving piezoelectric element in the first direction, and there is provided a voltage control section for controlling a magnitude of a voltage to be applied to the first driving piezoelectric element.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: December 21, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Hidetoshi Saito
  • Patent number: 11201570
    Abstract: A vibration wave motor comprises a vibrator including a piezoelectric element and a vibrating body, a friction member including a first surface configured to come into contact with the vibrator, and a second surface, which is a surface on the opposite side of the first surface, the vibrator and the friction member moving relative to each other in a driving direction by a vibration generated by the vibrator, a supporting member configured to support the friction member on the second surface side; and a pressure member configured to bring the vibrator and the friction member into pressure contact with each other. A fixing portion configured to fix the friction member to the supporting member is provided in the friction member. The vibrator can move to a position where at least part of the vibrator and the fixing portion overlap each other in a pressure direction of the pressure member.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: December 14, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroki Ito, Yasufumi Yamamoto
  • Patent number: 11050364
    Abstract: A semi-resonant actuator assembly includes a resonating body comprising a piezoelectric plate having a first length, a first width, and a first thickness, and an inactive plate having a second length substantially equal the first length, a second width substantially equal to the first width, and second thickness. A thickness of the resonating body is provided by a sum of the first thickness of the active piezoelectric plate and the second thickness of the inactive plate.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: June 29, 2021
    Assignee: NEW SCALE TECHNOLOGIES, INC.
    Inventors: David A. Henderson, Qin Xu, Daniele Piazza, Eric Walkama
  • Patent number: 11012005
    Abstract: A hollow-cylindrical ultrasonic actuator is disclosed a central axis, an inner peripheral surface facing the central axis and an outer peripheral surface facing away from the central axis and spaced apart from the inner peripheral surface, a closed inner contour curve, a closed outer contour curve, at least one electrode, and an electromechanical material provided between opposed electrodes. In a non-actuated state of the ultrasonic actuator, a curvature of the inner contour curve or of an outer contour curve includes at least three mutually spaced-apart local maximum points.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: May 18, 2021
    Assignee: PHYSIK INSTRUMENT (PI) GMBH & CO. KG
    Inventor: Thomas Polzer
  • Patent number: 10680156
    Abstract: A piezoelectric actuator includes a vibrator having a vibrating part including a piezoelectric element and a transmitting portion provided in the vibrating part and transmitting drive power to a driven part, and an energizing part that may energize the vibrator toward the driven part, wherein the energizing part has a base portion connected to the vibrator and a pair of spring portions integrally formed with the base portion.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: June 9, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Yutaka Arakawa
  • Patent number: 10625669
    Abstract: A system includes a computer including a processor and a memory, the memory storing instructions executable by the processor to emit a first sound from a vehicle ultrasonic sensor in an ultrasonic frequency range and actuate a frequency modifier to modify a frequency of the emitted sound to emit a second sound in an audible frequency range.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: April 21, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Erik J. Christen, Prasad Venkiteswaran, Maher Ghneim, Adriano Castelvetere
  • Patent number: 10559740
    Abstract: A driving device includes a plurality of motive power generators that receive electric power supply and generate motive power, the plurality of motive power generators form a plurality of sets of motive power generators in which two or more of the motive power generators are electrically parallel-connected, and the plurality of sets of motive power generators are electrically series-connected. A driving device includes a plurality of vibrators that receive electric power supply and vibrate and provide drive power for driving a driven member to the driven member, the plurality of vibrators form a plurality of sets of vibrators in which two or more of the vibrators are electrically parallel-connected, and the plurality of sets of vibrators are electrically series-connected.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: February 11, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Osamu Miyazawa
  • Patent number: 10541630
    Abstract: A manufacturing method of a vibrator includes processing a tip of a contact part arranged on an elastic body of the vibrator by lapping or grinding processing so that part of the tip has a plane shape in part of a spherical shape.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: January 21, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Daisuke Yokoyama
  • Patent number: 10516349
    Abstract: A vibration actuator includes a vibration element including a piezoelectric element as an electromechanical energy conversion element and an elastic body which is joined to the piezoelectric element, and a driven element which is brought into pressure contact with the elastic body. Driving vibration is excited in the vibration element by applying a drive signal to the piezoelectric element, whereby the vibration element and the driven element are moved relative to each other. The driving vibration is a vibration in which at least n-th-order vibration and 2n-th-order vibration are combined, n being a natural number.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: December 24, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Tsuchiya, Takao Mori
  • Patent number: 10511236
    Abstract: A piezoelectric device drive circuit applies a drive signal to a piezoelectric device. An H-bridge circuit includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal, the first output terminal and the second output terminal being connected to the piezoelectric device. A resistor is connected between the piezoelectric device and the first output terminal. A differential amplifier circuit receives, as an input, a voltage across the resistor. An inverting circuit has an input terminal connected to an output terminal of the differential amplifier circuit. A comparator has an input terminal connected to an input terminal of the inverting circuit, and an output terminal connected to the first input terminal. A comparator has an input terminal connected to an output terminal of the inverting circuit, and an output terminal connected to the second input terminal.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: December 17, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Kenjiro Okaguchi
  • Patent number: 10429255
    Abstract: A piezoelectric sensor is fixed to a detection object and detects distortion of the detection object includes first and second principal surfaces, and extends in the lengthwise direction. The piezoelectric sensor includes a piezoelectric body whose polarization axis extends in a direction parallel or substantially parallel to the lengthwise direction, and first and second detecting electrodes that are provided on a surface of the piezoelectric body and that extend in a direction parallel or substantially parallel to the lengthwise direction. Distortion of the detection object is detected based on electric output corresponding to shear stress of the piezoelectric body.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: October 1, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Yuya Genmei, Jiro Inoue, Masayuki Ichimaru
  • Patent number: 10404191
    Abstract: The invention relates to a stator for an electro-mechanical wave motor and an electro-mechanical wave motor including such stator. The stator includes a plurality of actuators positioned along a closed travelling path on at least a first side of the substrate. The plurality of actuators is configured to generate a travelling wave along the closed travelling path. The substrate has an outer periphery structure and an inner periphery structure and a plurality of rigid outer bridge structures and at least one rigid inner bridge structure. Each of the rigid outer bridge structures extends from the outer periphery structure and outwards and is connected to or adapted to be connected to an outer stabilization member and the at least one rigid inner bridge structure extends from the inner periphery structure and inwards and is connected to or is adapted to be connected to an inner stabilization member.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: September 3, 2019
    Assignee: PCB MOTOR APS
    Inventors: Henning Ellesgaard, Eivind Johansen
  • Patent number: 10312831
    Abstract: A method for controlling an ultrasonic motor. From a starting velocity or starting position of the driven element, the method includes adjusting the frequency of the electrical excitation voltage such that it is equal to or close to the mechanical resonance frequency of the ultrasonic actuator; changing the frequency of the electrical excitation voltage using the signal of the velocity sensor or the position sensor towards the anti-resonance frequency of the ultrasonic actuator until an end velocity or an end position of the driven element is reached; and controlling the end velocity or position of the driven element with a predetermined accuracy by means of antiphase frequency change. Also disclosed is a corresponding control arrangement for an ultrasonic motor having an ultrasonic actuator with at least two acoustic wave generators, a driven element and a generator via a frequency adjustment.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: June 4, 2019
    Assignee: Physik Instrumente (PI) GMBH & Co. KG
    Inventors: Wladimir Wischnewskiy, Alexej Wischnewski
  • Patent number: 10195737
    Abstract: A piezoelectric drive device includes a vibrating body, a support portion formed integrally with the vibrating body, and a piezoelectric element formed of a first electrode film, a piezoelectric body film, and a second electrode film on at least one surface of the vibrating body.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: February 5, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Yutaka Arakawa, Akio Konishi, Yasuharu Hashimoto, Osamu Miyazawa, Tomohisa Iwazaki, Yuichiro Tsuyuki
  • Patent number: 10186988
    Abstract: The dimension in a moving direction of a vibration wave motor is shortened without impairing the thrust force, and the size of a driver is reduced. The vibration wave motor includes a vibrating plate having a substantially rectangular outline, a piezoelectric element bonded to the vibrating plate and configured to vibrate, and a protrusion provided to the vibrating plate or the piezoelectric element. The vibrating plate has a section not covered with the piezoelectric element inside a rectangular region encompassing the piezoelectric element within a plane where the piezoelectric element is bonded, and also has a notched portion along a straight line which passes through the section and is parallel to one side of the outline of the vibrating plate.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: January 22, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hitoshi Nishitani
  • Patent number: 10120158
    Abstract: A vibration-type actuator can be miniaturized and can stabilize a pressure state between a driven body and a vibration body. A pressurizing unit applies a pressure force between projections on the vibration body and the driven body. A piezoelectric device connected to the vibration body on a surface opposite to the projections moves the driven body by vibration occurring in the vibration body when a drive voltage is applied. The pressurizing unit includes an energizing member, its support member, and a transfer member. A length of a contact area between the projections and the driven body is shorter than a length of an area in which the transfer member transfers the pressure force from the energizing member to the vibration body and a length of a contact area between the energizing member and the support member, in a direction perpendicular to the moving direction and to a pressurizing direction by the pressurizing unit.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: November 6, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuki Oda, Masanori Takahashi, Makoto Shihoh, Daisuke Yokoyama
  • Patent number: 10120178
    Abstract: A vibration drive device can suppress separation between members thereof when an external force is applied thereto. The vibration drive device excites vibration in a vibrating body to move the vibrating body and a driven body relative to each other. The vibrating body has a piezoelectric element joined to a first surface of an elastic body. Protrusions for pressure contact with the driven body are formed on a second surface of the elastic body. The elastic body is supported by support plates, and the support plates are held on a base. An equalizing stage is disposed on a side facing the first surface of the elastic body. A vibration damping member disposed between the vibrating body and the equalizing stage suppresses transmission of vibration from the vibrating body to the equalizing stage.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: November 6, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasuyuki Araki
  • Patent number: 10044295
    Abstract: A piezoelectric actuator includes a piezoelectric element, a vibrating plate configured to vibrate according to application of a signal to the piezoelectric element, and a driven body driven by the vibration of the vibrating plate. The vibrating plate vibrates in a first mode according to a signal having a first frequency, vibrates in a second mode according to a signal having a second frequency, and vibrates in a third mode according to a signal having a third frequency. The first frequency and the second frequency are different. The first frequency and the third frequency are different.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: August 7, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Koichi Kamijo, Osamu Miyazawa
  • Patent number: 9893651
    Abstract: A linear vibration-wave motor being configured to apply a driving force to a lens barrel of an optical device includes a vibrator being operable to excite a vibration, a member to be contacted contacting the vibrator, the vibrator being arranged to move in a direction of the driving force with respect to the member to be contacted upon exciting the vibration, a vibrator support being fixed to the lens barrel and configured to support the vibrator, a pressurization member being operable to press the vibrator against the member to be contacted, a unit cover member including an opening extending in the direction of the driving force, and a unit base member having fixed thereto the member to be contacted and the unit cover member. The pressurization member is detachable from the vibrator support via the opening.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: February 13, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Harushige Yamamoto
  • Patent number: 9705425
    Abstract: A piezoelectric motor with improved efficiency and improved specific power is disclosed. The piezoelectric motor has two frictionally engaged components mounted in such a way that they can move relative to each other. One component is a piezoelectric element in the form of a rectangular plate with metal coatings on its main planar surfaces. This component defines electrodes, where either some or all of the electrodes have leads for connection to a source of alternating voltage. The piezoelectric element is pressed by either its peripheral surfaces or by some parts of its peripheral surfaces at least by one of its sides or a section of one of its side against a cylindrical or planar surface of the other frictionally engaged component.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: July 11, 2017
    Assignee: Discovery Technology International, Inc.
    Inventors: Serhiy Petrenko, Viacheslav Lavrinenko, Valentin R. Zhelyaskov
  • Patent number: 9700917
    Abstract: There is provided a vibration generating device including: a piezoelectric element which is deformed when power is applied thereto; an installation member below which the piezoelectric element is installed; a weight fixedly installed below the installation member to be disposed below the piezoelectric element; a plurality of elastic members connected to the installation member to change a displacement direction by deformation of the installation member and disposed to face each other; and a damper member fixedly installed on a lower surface of the weight, wherein a thickness of the damper member is determined to allow the damper member to be disposed in a space formed by the plurality of elastic members when the elastic members are driven normally.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: July 11, 2017
    Assignee: MPLUS CO., LTD.
    Inventors: Seung Hyeon Jeong, Hwa Young Oh
  • Patent number: 9705428
    Abstract: A vibration-type driving apparatus includes a vibrator holder, wherein a plurality of vibrators each having at least an electro-mechanical energy conversion element and an elastic member having a contact portion formed therein are connected to a vibrator holding member, for generating an ellipsoidal movement of the contact portion, to move, relative to the vibrator, a driving member contacting the contact portion. The plurality of vibrators are connected to a surface of the holding member at a side at which the contact portion contacts the driving member, and on a surface of the vibrator holding member opposite to the side at which the contact portion contacts the driving member, a pressing member is placed to set the contact portion to be pressed and contacted to the driving member.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: July 11, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Seki, Takayuki Tsukimoto
  • Patent number: 9660556
    Abstract: A small linear ultrasonic motor includes: a vibration element generating ultrasonic vibrations by applying high frequency drive voltage; a slider against which vibration element is pressed and which is relatively moved by the ultrasonic vibrations; a vibration element supporting member retaining the vibration element and relatively moving with respect to the slider; a guide portion guiding a moving direction of the relative movement of the vibration element supporting member; and a pressurizing portion pressing the vibration element against the slider, wherein the guide portion is arranged sandwiching a position at which the vibration element is pressed against the slider, in a plane that includes the moving direction and intersects with a pressurizing direction of a pressurizing force exerted by the pressurizing portion, and at least each part of the pressurizing portion and the guide portion is disposed at a position equidistant from the plane in the pressurizing direction.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: May 23, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Harushige Yamamoto
  • Patent number: 9496482
    Abstract: An actuator includes a vibrating piezoelectric element and a holding section configured to hold the piezoelectric element. The holding section includes a first supporting section arranged on a vibrating surface of the piezoelectric element and arranged on one side of the piezoelectric element and a second supporting section arranged on the other side of the piezoelectric element.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: November 15, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Osamu Miyazawa
  • Patent number: 9420073
    Abstract: There is provided a vibrator including: a housing having an internal space and having at least one through-hole formed therein; a vibrator disposed in the housing and vibrating; and an impact damping member installed on at least one of outer surfaces of the housing and damping impact, wherein the vibrator has protrusions disposed thereon so as to correspond to the through-hole and contacting the impact damping member while penetrating the through-hole at the time of external impact.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: August 16, 2016
    Assignee: MPLUS CO., LTD.
    Inventors: Jong Woo Hong, Yun Yeong Park
  • Patent number: 9393661
    Abstract: The processing device has a shaft shape, at least an outer surface of a front end which is a surface of holding diamond grind grains, and a concave portion formed on a central part in a radial direction of a front surface. The chemical tempered glass having a surface reinforced layer is processed by using the processing device which is rotated around its shaft center and vibrated in a direction of extending the shaft center. The vibration of the processing device is feed-back controlled to the chemical tempered glass to approach an amplitude and a frequency of the processing device to a target amplitude and a target frequency, respectively, and setting the target amplitude at a value in a range from 3 ?m to 9 ?m and the target frequency at a value in a range from 60 kHz to 64 kHz.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: July 19, 2016
    Assignee: CERON Technologies Inc.
    Inventor: Hironori Minami
  • Patent number: 9391542
    Abstract: An ultrasonic actuator includes at least one primary waveguide resonator, with each primary generator being in flat, at least one auxiliary waveguide resonator, with each auxiliary generator being in contact in order to form an acoustic standing wave, at least one crosspiece that connects one of the at least one primary waveguide resonators and one of the at least one auxiliary waveguide resonators to each other at least in sections, and wherein at least one friction track or friction rail is arranged on the crosspiece wherein the at least one primary waveguide resonator and the at least one auxiliary waveguide resonator is an open linear waveguide, and the at least one crosspiece functions as a totalizing device of the acoustic standing waves propagated in the primary and auxiliary waveguide resonators, so that the at least one crosspiece functions as the generator of a simulated travelling wave.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: July 12, 2016
    Assignee: Physik Instrumente (PI) GmbH & Co. KG
    Inventor: Wladimir Wischnewskiy
  • Patent number: 9331263
    Abstract: A piezoelectric motor includes a piezoelectric element, an oscillating plate including the piezoelectric element, a driving projection provided at an end of the oscillating plate, and a driven member driven by the driving projection coming into abutment therewith and is characterized in that Young's modulus E1 of the driving projection and Young's modulus E2 of the driven member are different.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: May 3, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Koichi Kamijo, Kazuhiro Tsuchiya
  • Patent number: 9263972
    Abstract: A vibrator includes an elastic body bonded to an electrical-mechanical energy converting element and including at least two contact parts, in which the at least two contact parts have convex shapes, shapes of surfaces of the at least two contact parts are part of spherical shapes, and rising directions of the at least two contact parts toward a member to be driven when the member is driven are different.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: February 16, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Daisuke Yokoyama
  • Patent number: 9246413
    Abstract: An ultrasonic motor (10) includes a vibrator (50) and an application means (oscillation circuit 80). A first vibrator area (51) and a second vibrator area (52), which form a vibrator (50), include piezoelectric elements polarized in the thickness direction, and fixed portions (30a, 30b) respectively. The oscillation circuit 80 applies an AC voltage to the piezoelectric elements respectively and makes the first vibrator area (51) and the second vibrator area (52) resonate individually in the surface-spreading directions. The ultrasonic motor (10) includes a coupling portion (55) for coupling vibration end portions (23a, 23b) each other and a contact element (60) which is provided on this coupling portion (55). The vibration end portions (23a, 23b) are positions which vibrate respectively in the approaching and separating directions by the resonances of the first vibrator area (51) and the second vibrator area (52) in the surface-spreading directions with respect to the fixed portions (30a, 30b).
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: January 26, 2016
    Assignee: Sumida Corporation
    Inventors: Kentaro Masuda, Motomi Takahashi
  • Patent number: 9219429
    Abstract: A linear ultrasonic motor includes a vibrator having a piezoelectric element, a movable part applying a pressurization force to the vibrator and bringing the vibrator into pressurized contact with a base part, a cover part being fixed to the base part, a rolling part being rollably held between a movable guide part of the movable part and a cover guide part of the cover part, and a body to be driven having a transmission member that is pivotably supported and being able to move only in the movable direction. The transmission member includes a bias part that abuts on a transmission part of the movable part and applies a biasing force of biasing the movable part to the rolling part, to the transmission part. The rolling part is held by a resultant force of the pressurization force or a reaction force of the pressurization force, and the biasing force.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: December 22, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takumi Yamanaka, Kazuhiro Noguchi
  • Patent number: 9099941
    Abstract: A vibration type driving device includes a vibrator configured to make an elliptic motion of a contact portion by combining vibrations in different vibration modes, and a driven body configured to be rotated relative to the vibrator by the elliptic motion while being in contact with the contact portion. A contact pressure of the contact portion with the driven body is lower on a radial inner side than on a radial outer side in a radial direction of the rotation.
    Type: Grant
    Filed: July 4, 2011
    Date of Patent: August 4, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Nobuyuki Kojima
  • Patent number: 9083264
    Abstract: A vibration element includes a substrate, a piezoelectric element including a piezoelectric layer and an electrode layer, and a bonding layer provided between the piezoelectric element and the substrate and comprising ceramic containing melted glass powder, wherein the vibration element causes the substrate to vibrate by vibration energy of the piezoelectric element to output the vibration energy of the substrate, and the piezoelectric element is fixed to the substrate via the bonding layer.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: July 14, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yutaka Maruyama
  • Patent number: 9082959
    Abstract: An exemplary actuator in the form of a plate is disclosed, which includes, at least two generators for exciting an acoustic standing wave in the actuator. The actuator can have at least two main surfaces and a plane of symmetry S running perpendicularly to the main surfaces, with respect to which the generators are arranged symmetrically. A first lateral surface area can have a length L that substantially corresponds to the wavelength of the acoustic standing wave excited in the actuator. A second lateral surface area of the actuator can have a length (B) that is greater than the wavelength of the acoustic standing wave excited in the actuator, and that is not equal to a multiple of half the wavelength of the excited acoustic standing wave.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: July 14, 2015
    Assignee: PHYSIK INSTRUMENTE (PI) GMBH & CO. KG
    Inventors: Wladimir Wischnewskiy, Alexej Wischnewskij
  • Publication number: 20150114164
    Abstract: A first driving signal is supplied to a first electrode of a vibrating body. A second driving signal is supplied to a second electrode of the vibrating body. A common driving signal is supplied to a common electrode of the vibrating body. A phase of the first driving signal is set changeable with respect to a phase of the common driving signal. A phase of the second driving signal is set changeable with respect to the phase of the common driving signal. Then, it is possible to switch a driving direction of a piezoelectric motor according to which phase of the first driving signal or the second driving signal is varied from the phase of the common driving signal. If the phase is simply changed, a switch is unnecessary. It is possible to reduce a driving circuit in size.
    Type: Application
    Filed: October 21, 2014
    Publication date: April 30, 2015
    Inventor: Osamu URANO
  • Patent number: 8987972
    Abstract: A vibrator, which constitutes a vibrating device of a vibration-type driving apparatus in which the vibrating device is bonded to an electromechanical-energy-conversion element, has at least one projection portion thereon, and elliptic motion can arise at each projection portion by applying an alternating electric field to the electromechanical-energy-conversion element. A driven object moves by the elliptic motion when in contact with the projection portion in a direction intersecting with a width direction. The vibrator includes a base and the at least one projection portion, with each projection portion having at least two wall portions extending in a base out-of-plane direction, and a contact portion having a contact surface with the driven object. The contact surface connects the wall portions, and boundary portions between the base and the wall portions are provided such that displacement directions in a normal direction are the same.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: March 24, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuyuki Araki, Hiroyuki Seki
  • Patent number: 8981619
    Abstract: A vibration type actuator providing a satisfactory actuator performance even when an increase in speed is achieved and having a contact spring. The actuator includes a vibrator equipped with an electrical-mechanical energy conversion element, an elastic member to which the electrical-mechanical energy conversion element is fixed, and a protrusion provided on the elastic member. The vibrator can generate an elliptic movement in the protrusion. A driven body is configured to come into contact with the protrusion and to make a relative movement with respect to the vibrator. The protrusion includes a contact portion having a contact surface contacting the driven body, a continuous side wall portion protruding with respect to one end surface of the elastic member and forming a hollow structure, and a connection portion connecting the contact portion and the side wall portion and exhibiting flexibility in a direction normal to the contact surface.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: March 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Atsushi Kimura
  • Patent number: 8981620
    Abstract: A driving mechanism driving a first member and a second member relative to each other which includes a piezoelectric element that drives the first member, a base member that movably supports the first member with the piezoelectric element interposed therebetween, and an electrode portion that is supplied with a driving voltage of the piezoelectric element. The electrode portion includes an exposed portion exposed from the base member.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: March 17, 2015
    Assignee: Nikon Corporation
    Inventors: Kunihiro Kuwano, Satoshi Kariya
  • Publication number: 20150062257
    Abstract: A sodium niobate powder includes sodium niobate particles having a shape of a cuboid and having a side average length of 0.1 ?m or more and 100 ?m or less, wherein at least one face of each of the sodium niobate particles is a (100) plane in the pseudocubic notation and a moisture content of the sodium niobate powder is 0.15 mass % or less. A method for producing a ceramic using the sodium niobate powder is provided. A method for producing a sodium niobate powder includes a step of holding an aqueous alkali dispersion liquid containing a niobium component and a sodium component at a pressure exceeding 0.1 MPa, a step of isolating a solid matter from the aqueous dispersion liquid after the holding, and a step of heat treating the solid matter at 500° C. to 700° C.
    Type: Application
    Filed: April 3, 2013
    Publication date: March 5, 2015
    Inventors: Tomoaki Masubuchi, Toshiaki Aiba, Toshihiro Ifuku, Makoto Kubota, Takayuki Watanabe, Tatsuo Furuta, Jumpei Hayashi
  • Publication number: 20150054384
    Abstract: The actuator includes a vibration plate including a fixing portion for fixing the vibration plate to a holding member, and a connection portion for connecting a center portion and the fixing portion, and is provided between a surface and a friction-sliding surface in a direction in which the vibration plate is pressed against the rotor by a pressurizing force produced by a pressure member. When finishing a surface on which a piezoelectric device is to be fixed to the vibration plate to a uniform surface by polishing, a decrease in the performance of the ultrasonic motor due to deformation of the vibration plate that is caused by warping of support portions that extend from both ends thereof or by burrs or the like can be prevented, and the time required to polish the vibration plate can be reduced.
    Type: Application
    Filed: August 21, 2014
    Publication date: February 26, 2015
    Inventors: Ryo YAMASAKI, Makoto Oikawa
  • Publication number: 20150048719
    Abstract: The task of the present invention is to provide an inertial drive actuator having a small-size arrangement, without using a vibration substrate. The inertial drive actuator includes a coil, a movable body which is disposed in a direction in which, a magnetic flux of the coil is generated, and which is formed of a magnetic material having a surface facing the coil, and a displacement generator (piezoelectric element) which displaces the coil in a direction different from the direction in which the magnetic flux is generated. Moreover, the movable body is displaced relatively with respect to the displacement generator (piezoelectric element), along a direction of displacement of the displacement generator (piezoelectric element).
    Type: Application
    Filed: October 30, 2014
    Publication date: February 19, 2015
    Applicant: OLYMPUS CORPORATION
    Inventor: Tetsuya MORISHIMA
  • Publication number: 20150042209
    Abstract: The invention relates to an ultrasonic actuator (2) with a polarization axis P, said actuator being made of a piezoelectric ceramic. The ultrasonic actuator (2) has a temperature expansion coefficient which is parallel to the polarization axis P and which differs from a temperature expansion coefficient that is perpendicular to the polarization axis P, and at least one friction element (8) is arranged on the ultrasonic actuator. The friction element (8) consists of an anisotropic monocrystal with temperature expansion coefficients which are different along the three crystal axes a, b, and c. The temperature expansion coefficient along a first of the three crystal axes is the lowest, and the temperature expansion coefficient along a second of the three crystal axes is the greatest.
    Type: Application
    Filed: February 4, 2013
    Publication date: February 12, 2015
    Inventors: Wladimir Wischenwskiy, Alexej Wischenwskiy
  • Publication number: 20150028723
    Abstract: A piezoelectric actuator comprises a substantially rectangular parallelepiped piezoelectric element. One outer surface of the piezoelectric element includes a first region, and a second region located such as to project from the first region and to overlap a region corresponding to an active portion in the one outer surface. The second region has a flat surface configured to come into contact with a body to be driven and to generate a frictional force therewith. The flat surface is shorter in a longitudinal direction of the piezoelectric element than in a lateral direction thereof. The flat surface is longer in the longitudinal direction of the piezoelectric element at a lateral center region thereof than at a lateral end region thereof.
    Type: Application
    Filed: July 18, 2014
    Publication date: January 29, 2015
    Inventors: Yoshiki IKEDA, Keiji OGUCHI
  • Patent number: 8896183
    Abstract: In an inner bottom surface of a case, a substantially oblong recess having a long axis and a short axis forms a vibration area. A piezoelectric element is bonded to the center of the recess. On the opposite sides of the vibration area, vibration suppression areas thicker than the vibration area are disposed. A side portion of the case is formed to be thin over the entire circumference thereof. A reinforcing member higher in rigidity than the case is bonded to upper portions of the vibration suppression areas. The reinforcing member has a bottom surface substantially equal to the shape of the vibration suppression areas, and has a predetermined height. A gap between the reinforcing member and an inner side surface of the case is also filled with a filling member.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: November 25, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Kenji Matsuo
  • Publication number: 20140319965
    Abstract: An actuator includes the first and the second extendable driver portions. The first extendable driver portion includes an electrolyte layer laminated with electrode layers each including an electroconductive polymer and expands and contracts according to application of a voltage between the electrode layers. The second extendable driver portion includes an electrolyte layer laminated with electrode layers each including an electroconductive polymer and expands and contracts according to application of a voltage between the electrode layers. The first and the second extendable driver portions are arranged between a fixation portion and an application portion. The application portion moves as the first and the second extendable driver portions extend and contract.
    Type: Application
    Filed: April 15, 2014
    Publication date: October 30, 2014
    Applicant: CASIO COMPUTER CO., LTD.
    Inventor: Kaoru SOMEYA
  • Publication number: 20140319966
    Abstract: A vibration-type driving apparatus including: a vibrator holder wherein a plurality of vibrators each having at least an electro-mechanical energy conversion element and a elastic member having a contact portion formed therein are connected to a vibrator holding member, for generating an ellipsoidal movement of the contact portion, to move, relative to the vibrator, a driving member contacting the contact portion, wherein the plurality of vibrators are connected to a surface of the holding member at a side at which the contact portion contacts the driving member, and on a surface of the vibrator holding member opposite to the side at which the contact portion contacts the driving member, a pressing member is placed to set the contact portion to be pressed and contacted to the driving member.
    Type: Application
    Filed: July 7, 2014
    Publication date: October 30, 2014
    Inventors: Hiroyuki SEKI, Takayuki Tsukimolo
  • Publication number: 20140300977
    Abstract: An ultrasonic motor includes a vibrator configured to generate a vibration, a relatively movable member configured to be movable by the vibrator, wherein the relatively movable member is movable relatively according to the vibration of the vibrator, a holding unit configured to hold the vibrator, wherein the holding unit includes a first holding member configured to hold the vibrator and a second holding member; and a damping member provided between the vibrator and the second holding member and configured to reduce a vibration transmitted to the second holding member, a pressure unit configured to press the vibrator against the relatively movable member, wherein the second holding member is configured to press the vibrator against the relatively movable member, and wherein the first holding member is made of a material having a higher damping capability against the vibrator than a material of the second holding member.
    Type: Application
    Filed: June 23, 2014
    Publication date: October 9, 2014
    Inventors: Ryo Yamasaki, Makoto Oikawa
  • Patent number: 8827428
    Abstract: A piezoelectric motor includes a piezoelectric element having a piezoelectric layer, and a first and a second electrodes, the first electrode provided on one surface side of the piezoelectric layer, and the second electrode provided on the other surface side of the piezoelectric layer; a piezoelectric actuator having a vibrating member anchored to the first electrode of the piezoelectric element; and a rotational shaft with which the vibrating member makes contact and is rotated thereby.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: September 9, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Osamu Miyazawa, Yasuharu Hashimoto, Akihito Matsumoto, Akira Matsuzawa
  • Patent number: 8816568
    Abstract: A vibration-type driving apparatus includes a vibrator holder, wherein a plurality of vibrators each having at least an electro-mechanical energy conversion element and an elastic member having a contact portion formed therein are connected to a vibrator holding member, for generating an ellipsoidal movement of the contact portion, to move, relative to the vibrator, a driving member contacting the contact portion. The plurality of vibrators are connected to a surface of the holding member at a side at which the contact portion contacts the driving member, and on a surface of the vibrator holding member opposite to the side at which the contact portion contacts the driving member, a pressing member is placed to set the contact portion to be pressed and contacted to the driving member.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: August 26, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Seki, Takayuki Tsukimoto