Patents by Inventor Osamu Miyazawa

Osamu Miyazawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20170001306
    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: Application
    Filed: June 27, 2016
    Publication date: January 5, 2017
    Inventors: Yutaka ARAKAWA, Akio KONISHI, Yasuharu HASHIMOTO, Osamu MIYAZAWA, Tomohisa IWAZAKI, Yuichiro TSUYUKI
  • 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
  • Publication number: 20160284968
    Abstract: A piezoelectric drive device includes a piezoelectric drive portion which includes a contact portion capable of coming into contact with a driven body and a piezoelectric material, and a drive circuit which drives the piezoelectric drive portion. The drive circuit sets an allowable maximum output torque Tlim or less to an allowable output torque range, sets output torque Td of the piezoelectric drive portion so as to be within the allowable output torque range, and operates the piezoelectric drive portion. The allowable maximum output torque Tlim is expressed by the following Expression (1). Tlim=r1×?k×Ns×fs??(1) In the expression, r1 is a distance between a rotation center of the driven body and a contact position of the contact portion, ?k is a dynamic friction coefficient between the driven body and the contact portion, Ns is a pressing force by which the contact portion presses the driven body when an operation of the piezoelectric drive portion stops, and fs is a coefficient of 1 or less.
    Type: Application
    Filed: February 15, 2016
    Publication date: September 29, 2016
    Inventor: Osamu MIYAZAWA
  • Publication number: 20160261211
    Abstract: A piezoelectric drive device includes multiple piezoelectric drive units that have a contact portion which can come into contact with a driven portion, and that have a piezoelectric substance. The number of the multiple piezoelectric drive units is 10 or more, an overall output from the multiple piezoelectric drive units is 0.3 W or greater, and a weight of the piezoelectric drive unit is 1 ?g to 5 g.
    Type: Application
    Filed: March 2, 2016
    Publication date: September 8, 2016
    Inventor: Osamu MIYAZAWA
  • Publication number: 20160241165
    Abstract: A piezoelectric drive device includes a vibrating plate and multiple piezoelectric drive units that are disposed in the vibrating plate, and that respectively have a contact portion which can come into contact with a driven body.
    Type: Application
    Filed: February 17, 2016
    Publication date: August 18, 2016
    Inventor: Osamu MIYAZAWA
  • Patent number: 9391257
    Abstract: An actuator includes a vibrating piezoelectric element, and a holding unit that holds the piezoelectric element, in which the holding unit is disposed on a vibrating surface of the piezoelectric element, and includes a first support unit and a second support unit that are disposed on one side of the piezoelectric element, and a third support unit and a fourth support unit that are disposed on the other side of the piezoelectric element.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: July 12, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Koichi Kamijo, Nobuyuki Mizushima, Osamu Miyazawa
  • Patent number: 9334935
    Abstract: A moving mechanism includes a first moving body arranged to move in a first direction relative to a support, a second moving body provided on a side of the support with the first moving body therebetween, and moves in a second direction intersecting the first direction relative to the first moving body, and a first vibrating body arranged in the support and biased to press the moving body or is arranged in the first moving body and biased to press the support. A direction in which first and second grooves face each other intersects a direction in which the support and the moving body face each other, and a biasing direction in which the first vibrating body is biased intersects the direction in which the first and second grooves face each other and the direction in which the support and the moving body face each other.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: May 10, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Yoshiteru Nishimura, Osamu Miyazawa
  • Publication number: 20160114492
    Abstract: A robot includes a first arm unit and a second arm unit. The robot includes a first drive part provided within the first arm unit and rotating the first arm unit about a first axis, and a second drive part provided within the first arm unit and rotating the second arm unit about a second axis. At least one of the first drive part and the second drive part contains a piezoelectric body.
    Type: Application
    Filed: October 21, 2015
    Publication date: April 28, 2016
    Inventors: Yutaka ARAKAWA, Osamu MIYAZAWA
  • Publication number: 20160049573
    Abstract: A piezoelectric driving device includes a vibrating plate and a piezoelectric vibrator provided on the vibrating plate. The piezoelectric vibrator has a first electrode, a second electrode, and a piezoelectric body located between the first electrode and the second electrode, and a thickness of the piezoelectric body is within a range from 50 nm to 20 ?m.
    Type: Application
    Filed: August 12, 2015
    Publication date: February 18, 2016
    Inventors: Osamu MIYAZAWA, Akio KONISHI
  • Publication number: 20160049574
    Abstract: A piezoelectric driving device includes a vibrating plate, and a piezoelectric vibrating body including a substrate, and piezoelectric elements provided on the substrate. The piezoelectric element includes a first electrode, a second electrode, and a piezoelectric body, and the first electrode, the piezoelectric body, and the second electrode are laminated in this order on the substrate. The piezoelectric vibrating body is installed on the vibrating plate so that the piezoelectric element is interposed between the substrate and the vibrating plate. A wiring pattern including a first wiring corresponding to the first electrode and a second wiring corresponding to the second electrode is formed on the vibrating plate, the first electrode and the first wiring are connected to each other through a first laminated conducting portion, and the second electrode and the second wiring are connected to each other through a second laminated conducting portion.
    Type: Application
    Filed: August 11, 2015
    Publication date: February 18, 2016
    Inventors: Tomohisa IWAZAKI, Akio KONISHI, Kiichi KAJINO, Koichi KAMIJO, Osamu MIYAZAWA, Yutaka ARAKAWA, Daisuke YAMADA
  • Publication number: 20160049887
    Abstract: A piezoelectric driving device includes: a piezoelectric vibrating body which includes a plurality of piezoelectric elements each formed of a first electrode, a second electrode, and a piezoelectric body positioned between the first electrode and the second electrode, and is disposed at least one surface of the first surface and the second surface of the vibrating plate, wherein the plurality of piezoelectric elements are connected in series.
    Type: Application
    Filed: August 12, 2015
    Publication date: February 18, 2016
    Inventor: Osamu MIYAZAWA
  • Patent number: 9248575
    Abstract: A second member having an elongated shape is attached to a first member via a connecting member. The connecting member is rotatable around a first shaft in a direction intersecting with a longitudinal direction of the second member with respect to the first member and rotatable around a second shaft intersecting both the longitudinal direction and a direction along the first shaft with respect to the second member. Further, a first drive part that rotationally drives the connecting member around the first shaft is provided in the first member and a second drive part that rotationally drives the connecting member around the second shaft is provided in the second member. In this manner, a robot hand that can rotate the first member and the second member not only around the first shaft but also around the second shaft may be realized with a simpler and smaller structure.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: February 2, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Osamu Miyazawa
  • Publication number: 20150349665
    Abstract: A piezoelectric actuator according to an embodiment includes a piezoelectric element, a vibrating plate including a main body section provided with the piezoelectric element, a fixing section, and a coupling section that couples the main body section and the fixing section, and a first member to which the vibrating plate is fixed. The fixing section is fixed to the first member by sandwiching the fixing section with the first member and a second member. In the thickness direction of the vibrating plate, each of the thicknesses of the first member and the second member is larger than the thickness of the fixing section. When viewed from the thickness direction of the vibrating plate, the main body section has a pair of sides opposed to each other. The vibrating plate includes a plurality of the coupling sections on one of the pair of sides of the main body section.
    Type: Application
    Filed: May 28, 2015
    Publication date: December 3, 2015
    Inventors: Koichi KAMIJO, Osamu MIYAZAWA, Yutaka ARAKAWA
  • Publication number: 20150318801
    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: Application
    Filed: April 24, 2015
    Publication date: November 5, 2015
    Inventors: Koichi KAMIJO, Osamu MIYAZAWA
  • Publication number: 20150158184
    Abstract: A supporting portion disposed in parallel to a joint portion to which a vibrating body capable of generating a bending vibration is jointed and configured to support the vibrating body and the joint portion is provided, and the joint portion and the supporting portion are coupled with a plurality of coupling portions. The supporting portion has rigidity higher than that of the joint portion.
    Type: Application
    Filed: December 5, 2014
    Publication date: June 11, 2015
    Inventors: Koichi KAMIJO, Osamu MIYAZAWA
  • Patent number: 9050828
    Abstract: A moving mechanism includes a support, a moving body arranged movably in a predetermined direction relative to the support, a first groove provided in the support parallel to the moving direction, a second groove provided in the moving body parallel to the moving direction, and facing the first groove, and a vibrating body arranged in the support or moving body and biased to press the other of the moving body or the support. A direction which the first groove and the second groove face each other intersects a direction which the support and the moving body face each other, and a biasing direction which the vibrating body is biased intersects the direction which the first groove and the second groove face each other and the direction which the support and the moving body face each other. Accordingly, backlash of the moving body with respect to the support is suppressed.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: June 9, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Osamu Miyazawa
  • Publication number: 20150094636
    Abstract: A finger assistive device is formed by connecting a second member to a first member so as to be rotatable in a bending direction of a finger. Further, either one of the first member and the second member is provided with a relative position changing section adapted to change a relative position of the second member to the first member in a direction different from the rotatable direction. According to this configuration, by changing the relative position of the second member to the first member in accordance with a length and a shape of the finger of the wearer, the finger assistive device can be customized (adjusted) so that the first member and the second member fit the mounting positions of the finger. As a result, it becomes possible to appropriately mount the finger assistive device to the finger and appropriately assist in bending the finger.
    Type: Application
    Filed: September 23, 2014
    Publication date: April 2, 2015
    Inventor: Osamu MIYAZAWA
  • Publication number: 20140352459
    Abstract: A drive device includes plural moving portions, piezoelectric motors that move the moving portions, at least one drive circuit that drives the piezoelectric motors, and a connection/disconnection portion that connects and disconnects the piezoelectric motors and the drive circuit. The number of drive circuits is fewer than the number of piezoelectric motors.
    Type: Application
    Filed: March 18, 2014
    Publication date: December 4, 2014
    Applicant: Seiko Epson Corporation
    Inventors: Akira Matsuzawa, Osamu Urano, Yoshiteru Nishimura, Masakuni Shiozawa, Osamu Miyazawa
  • Publication number: 20140288664
    Abstract: A finger assist device is formed by rotatably connecting a plurality of units in a finger bending direction and a finger spreading direction. The unit is worn on a finger by nipping the finger with a nipping part from the pad and the back of the finger, and a drive force is controlled by detecting a first contact force between the finger pad and the nipping part and a second contact force between the finger back and the nipping part. Since the intention of the wearer of the finger assist device appears in the first contact force and the second contact force, the drive force of the finger assist device is appropriately controlled according to the wearer's intention, and thereby, bending and spreading of the finger may be appropriately assisted.
    Type: Application
    Filed: March 10, 2014
    Publication date: September 25, 2014
    Applicant: Seiko Epson Corporation
    Inventor: Osamu Miyazawa
  • Publication number: 20140284951
    Abstract: A second member having an elongated shape is attached to a first member via a connecting member. The connecting member is rotatable around a first shaft in a direction intersecting with a longitudinal direction of the second member with respect to the first member and rotatable around a second shaft intersecting both the longitudinal direction and a direction along the first shaft with respect to the second member. Further, a first drive part that rotationally drives the connecting member around the first shaft is provided in the first member and a second drive part that rotationally drives the connecting member around the second shaft is provided in the second member. In this manner, a robot hand that can rotate the first member and the second member not only around the first shaft but also around the second shaft may be realized with a simpler and smaller structure.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 25, 2014
    Applicant: Seiko Epson Corporation
    Inventor: Osamu Miyazawa