Patents by Inventor Yasutaka Kitamura

Yasutaka Kitamura 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: 20230096114
    Abstract: A rotary reciprocating drive actuator includes: a movable body including a magnet fixed to a shaft portion; a fixing body including a plurality of magnetic poles, a first magnetic attraction member, and a second magnetic attraction member that are disposed to face an outer circumference of the magnet;, the plurality of magnetic poles including a plurality of coils, the first magnetic attraction member being configured to generate a first magnetic attraction force, the second magnetic attraction member being configured to generate a second magnetic attraction force, in which a magnetic flux passing through the plurality of magnetic poles is generated by energization of the plurality of coils, causing the reciprocating rotation of the movable body about an axis of the shaft portion with reference to the rotational center position by electromagnetic interaction between the magnetic flux and the magnet.
    Type: Application
    Filed: September 13, 2022
    Publication date: March 30, 2023
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Yasutaka KITAMURA, Yuki TAKAHASHI, Masaharu KAGAMI, Kai MASAMOTO
  • Publication number: 20230025894
    Abstract: A rotary reciprocating drive actuator includes: a movable body including a shaft portion and a magnet fixed to the shaft portion; a fixing body including a core assembly, the core assembly including a core body and coils, the core body having magnetic poles, the core assembly being disposed such that the magnetic poles face an outer periphery of the magnet; and a pair of shaft supports configured to sandwich the core assembly in an extending direction of extension of the shaft portion and support the shaft portion at opposite sides of the core assembly such that the shaft portion is rotatable, in which a magnetic flux passing through the core body is generated by energization of the coils, causing reciprocating rotation of the movable body about an axis of the shaft portion by electromagnetic interaction between the magnetic flux and the magnet.
    Type: Application
    Filed: July 19, 2022
    Publication date: January 26, 2023
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Yuki TAKAHASHI, Yasutaka KITAMURA, Masaharu KAGAMI, Kai MASAMOTO
  • Publication number: 20230026476
    Abstract: This optical scanning device includes: a shaft part to which a mirror part is connected; a movable magnet; a base part; a ball bearing; a core unit that has a core body and a coil body and rotationally drives the movable magnet; and a magnet position holding member that is a magnetic body provided facing the movable magnet and magnetically attracts the movable magnet to a reference position. The core unit is disposed on the outer surface side of one wall section of a pair of wall sections of the base part. An angle sensor unit for detecting the rotation angle position of the shaft part is disposed between the core unit and the one wall section.
    Type: Application
    Filed: December 11, 2020
    Publication date: January 26, 2023
    Applicants: MITSUMI ELECTRIC CO., LTD., DENSO CORPORATION
    Inventors: Yuki TAKAHASHI, Masaharu KAGAMI, Yasutaka KITAMURA
  • Publication number: 20230006526
    Abstract: A rotary reciprocating driving actuator includes: a movable member including a shaft part and a magnet; and a fixing body including a core assembly including a magnetic pole core with an integral structure including a plurality of magnetic poles, a plurality of coils disposed next to the plurality of magnetic poles, and a magnetic path core to which the magnetic pole core is assembled, wherein the core assembly is disposed such that the plurality of magnetic poles faces an outer periphery of the magnet, wherein a magnetic flux that passes through a magnetic path configured of the magnetic path core and the magnetic pole core of the integral structure is generated through energization of the plurality of coils, and the movable member is rotated back and forth around an axis of the shaft part through electromagnetic interaction of the magnetic flux and the magnet.
    Type: Application
    Filed: June 30, 2022
    Publication date: January 5, 2023
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Yuki TAKAHASHI, Yasutaka KITAMURA, Masaharu KAGAMI
  • Publication number: 20220415142
    Abstract: This bodily vibration generation device can be mounted to a bodily sensation presentation apparatus and generates, with a simple configuration, suitable vibration corresponding to a sound so that a user bodily senses the vibration. This device has: an electromagnetic actuator that causes, by an inputted drive signal, a movable body being supported so as to be elastically vibratable with respect to a fixed body, to vibrate by driving same in one direction of the vibration directions thereof; an AC signal input unit for inputting an AC signal; and a rectification unit that performs half-wave rectification of the AC signal and outputs the AC signal to the electromagnetic actuator as the drive signal.
    Type: Application
    Filed: November 27, 2020
    Publication date: December 29, 2022
    Applicant: MINEBEA MITSUMI Inc.
    Inventors: Yuki TAKAHASHI, Yasutaka KITAMURA, Tomoya ISHITANI
  • Patent number: 11515775
    Abstract: A vibration actuator has a movable body including: a disk-shaped magnet; disk-shaped cores fixed on front and rear surfaces of the magnet and each having an opening at a center thereof; leaf springs having a substantially circular shape; and spring stopper weight parts each having one end positioned by joining the opening to be joined with one of the cores and having another end connected to a central part of one of the leaf springs; and a fixing body including an annular coil having a larger inner diameter than the magnet, the cores and the spring stopper weight parts. The fixing body supports an outer periphery part of the leaf springs and accommodates therein the movable body such that the magnet, the cores and the spring stopper weight parts are capable of moving upwardly and downwardly inside the coil.
    Type: Grant
    Filed: December 26, 2021
    Date of Patent: November 29, 2022
    Assignee: Minebea Mitsumi Inc.
    Inventors: Yuki Takahashi, Chikara Sekiguchi, Shigeyuki Shimomura, Daisuke Kodama, Yuta Yoshii, Yasutaka Kitamura, Shigenori Inamoto
  • Patent number: 11444524
    Abstract: A vibration actuator has a movable body and a fixing body. The movable body includes: a disk-shaped magnet; annular cores each having an opening at a center thereof; and spring stopper weight parts, and stacked such that the magnet is disposed at a center of the movable body, the annular cores is fixed on front and rear surfaces of the magnet in its axial direction, and the spring stopper weight parts are joined with the annular cores at the opening. Each spring stopper weight part includes: a spring fixing part connecting to one of the elastic support parts; a joining protrusion part inserted into the opening of one of the annular cores; and a weight body part provided between the spring fixing part and the joining protrusion part, having a larger diameter, and disposed to face and join with an annular surface of one of the annular cores.
    Type: Grant
    Filed: December 26, 2021
    Date of Patent: September 13, 2022
    Assignee: Minebea Mitsumi Inc.
    Inventors: Yuki Takahashi, Chikara Sekiguchi, Shigeyuki Shimomura, Daisuke Kodama, Yuta Yoshii, Yasutaka Kitamura, Shigenori Inamoto
  • Publication number: 20220269068
    Abstract: A rotary reciprocating drive actuator capable of increasing the size and amplitude of a movable object such as a mirror, and of stabilizing the drive performance is provided. The rotary reciprocating drive actuator includes a movable part including a rotating shaft, a fixed part supporting the rotating shaft, and a driving part that includes a coil and a core disposed on the fixed part and a magnet disposed on the rotating shaft, and rotates the rotating shaft about the axis thereof with respect to the fixed part by utilizing electromagnetic interaction. The fixed part includes first and second supports disposed so as to face each other with the magnet therebetween in the axial direction. The rotating shaft is rotatably attached to the first and second supports via first and second bearings. One of the first and second bearings is a rolling bearing, and the other is a slide bearing.
    Type: Application
    Filed: February 17, 2022
    Publication date: August 25, 2022
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Yuki TAKAHASHI, Masaharu KAGAMI, Yasutaka KITAMURA, Yuki OTSUKA
  • Patent number: 11418099
    Abstract: A vibration actuator has: a fixing body; a movable body; and first and second elastic support parts disposed to sandwich the movable body in the vibration direction and configured to movably support the movable body with respect to the fixing body by elastic deformation, wherein the movable body includes: a core provided to both sides of a magnet of the movable body and having an opening; and spring stoppers disposed between the magnet and the first elastic support part and between the magnet and the second elastic support part; and wherein the spring stoppers are each fixed such that one end is fixed to one of the first or second elastic support part and such that another end is fixed by insertion into the opening and abutment on a surface of the movable body core facing the one of the first or second elastic support part.
    Type: Grant
    Filed: December 26, 2021
    Date of Patent: August 16, 2022
    Assignee: Minebea Mitsumi Inc.
    Inventors: Yuki Takahashi, Chikara Sekiguchi, Shigeyuki Shimomura, Daisuke Kodama, Yuta Yoshii, Yasutaka Kitamura, Shigenori Inamoto
  • Publication number: 20220123642
    Abstract: A vibration actuator includes: a movable body including: a disk-shaped magnet; a pair of disk-shaped cores fixed on front and rear surfaces of the disk-shaped magnet and each having an opening at a center thereof; a pair of leaf springs having a substantially circular shape; and a pair of spring stopper weight parts each having one end positioned by joining the opening to be joined with one of the disk-shaped cores and having another end connected to a central part of one of the leaf springs; and a fixing body including an annular coil and configured to support and accommodate therein the movable body such that the disk-shaped magnet, the disk-shaped cores and the spring stopper weight parts are capable of vibrating in an axial direction inside the annular coil.
    Type: Application
    Filed: December 26, 2021
    Publication date: April 21, 2022
    Applicant: Minebea Mitsumi Inc.
    Inventors: Yuki TAKAHASHI, Chikara SEKIGUCHI, Shigeyuki SHIMOMURA, Daisuke KODAMA, Yuta YOSHII, Yasutaka KITAMURA, Shigenori INAMOTO
  • Publication number: 20220123639
    Abstract: A vibration actuator has: a fixing body; a movable body; and first and second elastic support parts disposed to sandwich the movable body in the vibration direction and configured to movably support the movable body with respect to the fixing body by elastic deformation, wherein the movable body includes: a core provided to both sides of a magnet of the movable body and having an opening; and spring stoppers disposed between the magnet and the first elastic support part and between the magnet and the second elastic support part; and wherein the spring stoppers are each fixed such that one end is fixed to one of the first or second elastic support part and such that another end is fixed by insertion into the opening and abutment on a surface of the movable body core facing the one of the first or second elastic support part.
    Type: Application
    Filed: December 26, 2021
    Publication date: April 21, 2022
    Applicant: Minebea Mitsumi Inc.
    Inventors: Yuki Takahashi, Chikara Sekiguchi, Shigeyuki Shimomura, Daisuke Kodama, Yuta Yoshii, Yasutaka Kitamura, Shigenori Inamoto
  • Publication number: 20220123641
    Abstract: A vibration actuator has a movable body including: a disk-shaped magnet; disk-shaped cores fixed on front and rear surfaces of the magnet and each having an opening at a center thereof; leaf springs having a substantially circular shape; and spring stopper weight parts each having one end positioned by joining the opening to be joined with one of the cores and having another end connected to a central part of one of the leaf springs; and a fixing body including an annular coil having a larger inner diameter than the magnet, the cores and the spring stopper weight parts. The fixing body supports an outer periphery part of the leaf springs and accommodates therein the movable body such that the magnet, the cores and the spring stopper weight parts are capable of moving upwardly and downwardly inside the coil.
    Type: Application
    Filed: December 26, 2021
    Publication date: April 21, 2022
    Applicant: Minebea Mitsumi Inc.
    Inventors: Yuki TAKAHASHI, Chikara SEKIGUCHI, Shigeyuki SHIMOMURA, Daisuke KODAMA, Yuta YOSHII, Yasutaka KITAMURA, Shigenori INAMOTO
  • Publication number: 20220123640
    Abstract: A vibration actuator has a movable body and a fixing body. The movable body includes: a disk-shaped magnet; annular cores each having an opening at a center thereof; and spring stopper weight parts, and stacked such that the magnet is disposed at a center of the movable body, the annular cores is fixed on front and rear surfaces of the magnet in its axial direction, and the spring stopper weight parts are joined with the annular cores at the opening. Each spring stopper weight part includes: a spring fixing part connecting to one of the elastic support parts; a joining protrusion part inserted into the opening of one of the annular cores; and a weight body part provided between the spring fixing part and the joining protrusion part, having a larger diameter, and disposed to face and join with an annular surface of one of the annular cores.
    Type: Application
    Filed: December 26, 2021
    Publication date: April 21, 2022
    Applicant: Minebea Mitsumi Inc.
    Inventors: Yuki TAKAHASHI, Chikara SEKIGUCHI, Shigeyuki SHIMOMURA, Daisuke KODAMA, Yuta YOSHII, Yasutaka KITAMURA, Shigenori INAMOTO
  • Publication number: 20220111418
    Abstract: Provided is a control device capable of reducing cost and thickness by using an electromagnetic actuator, and capable of efficiently generating a thrust suitable for a haptic feeling feedback to an operator who touches and operates thereto. The control device controls the electromagnetic actuator that drives an operation device supported to be elastically vibrated in one direction of a vibrating direction thereof; includes a current pulse supply unit configured to supply a plurality of drive current pulses to a coil of the electromagnetic actuator as a drive current for driving the operation device in response to a touch operation of the operation device; and an interval between peaks for each of the drive current pulses is in a range of ½ times to 1 times a vibration period of an elastic vibration.
    Type: Application
    Filed: November 26, 2019
    Publication date: April 14, 2022
    Applicant: MINEBEA MITSUMI Inc.
    Inventors: Yuki TAKAHASHI, Tomoya ISHITANI, Takahiko IRIE, Yasutaka KITAMURA
  • Publication number: 20220043255
    Abstract: A movable magnet is configured by alternately magnetizing an even number of magnetic poles at an outer periphery of a shaft part; a number of core magnetic poles as magnetic poles of a core body and a number of magnetic poles of the movable magnet are equal to each other; the core magnetic poles are disposed to face the movable magnet with an air gap therebetween on an outer peripheral side of the movable magnet in a direction orthogonal to the shaft part; a drive unit is provided with a magnet position holding part provided to face the movable magnet and magnetically attracts the movable magnet to a reference position; the core body is formed to surround an even number of the core magnetic poles; and a coil body is disposed at the core body adjacent to each of the even number of the core magnetic poles.
    Type: Application
    Filed: August 5, 2021
    Publication date: February 10, 2022
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yasutaka KITAMURA, Yuki TAKAHASHI, Masaharu KAGAMI, Yuki OTSUKA
  • Patent number: 11245319
    Abstract: This actuator has a stationary body having either a coil or a magnet, a movable body having the other, that is, a magnet or a coil, and an elastic body that supports the movable body so as to be capable of moving with respect to the stationary body. The movable body moves reciprocally with respect to the stationary body in the vibration direction due to concerted movement of the magnet and the energized coil. The magnet can advance into and separate from the interior of the coil in the vibration direction. The elastic body is a plate-shaped elastic body one end of which is secured to a stationary unit, the other end of which is secured to the movable body, and which supports the movable body with a cantilever structure so as to be capable of oscillating reciprocally in the vibration direction.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: February 8, 2022
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yuki Takahashi, Kazutaka Sakaguchi, Yasutaka Kitamura, Shigenori Inamoto
  • Publication number: 20210328491
    Abstract: This vibration actuator has: a stationary body having a coil; a movable body having a magnet disposed radially inside the coil; and an elastic support part for supporting the movable body so that the movable body can move relative to the stationary body. The stationary body has a coil holding part. The coil holding part has, on the inner diameter side of the coil, a coil protection wall part. The elastic support part has at least two or more plate springs bridged between the coil holding part and the movable body so as to sandwich the movable body in a vibration direction. In order that the movable body does not come into contact with the coil holding part when not vibrating and when vibrating, the plate springs support the movable body so that the movable body is movable in the vibration direction.
    Type: Application
    Filed: August 28, 2019
    Publication date: October 21, 2021
    Applicant: Minebea Mitsumi Inc.
    Inventors: Yuki TAKAHASHI, Chikara SEKIGUCHI, Shigeyuki SHIMOMURA, Daisuke KODAMA, Yuta YOSHII, Yasutaka KITAMURA, Shigenori INAMOTO
  • Publication number: 20210265904
    Abstract: A rotary reciprocating drive actuator reciprocally and rotationally driving the movable body about the shaft part in relation to the fixed body by the electromagnetic mutual effect of the coil and the movable magnet, wherein the movable magnet is magnetized in the radial direction of the shaft part, the two magnetic poles are disposed facing each other across an air gap in the radial direction of the movable magnet and the shaft part, and the fixed body has a rotation-angle-holding part disposed facing the movable magnet across the air gap, the rotation-angle-holding part holding the rotation angle position of the movable magnet by the magnetic attraction force generated with the movable magnet.
    Type: Application
    Filed: June 26, 2019
    Publication date: August 26, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yuki TAKAHASHI, Yasutaka KITAMURA, Masaharu KAGAMI, Shigenori INAMOTO
  • Publication number: 20210184554
    Abstract: A movable magnet is configured by alternately magnetizing an even number of magnetic poles forming an South pole and an North pole; a number of magnetic poles of a core body is equal to a number of magnetic poles of the movable magnet; an even number of magnetic poles of the core body is respectively arranged to face the movable magnet with an air gap therebetween on the outer peripheral side of a shaft portion; and a drive unit is provided with a magnet position holding portion to face the movable magnet and magnetically attracts the movable magnet to a reference position. A drive unit is attached to one wall portion of the pair of wall portions of a base portion, and an angle sensor portion for detecting a rotation angle of the shaft portion is attached to the other wall portion of the pair of wall portions.
    Type: Application
    Filed: December 13, 2020
    Publication date: June 17, 2021
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Yuki TAKAHASHI, Masaharu KAGAMI, Yasutaka KITAMURA
  • Patent number: 10886828
    Abstract: A vibration actuator includes: a fixing part including one of a coil and a magnet; a movable part including the other one of the coil and the magnet; and an elastic supporting part configured to support the movable part movably with respect to the fixing part. The movable part is configured to reciprocate with respect to the fixing part in a vibration direction through cooperation between the powered coil and the magnet. The magnet is disposed away from and radially inside the coil. The elastic supporting part has a plate-like shape in which one end of the elastic supporting part is fixed to the fixing part at the side of the movable part and the other end is fixed to the movable part, and cantilevers the movable part in such a manner that the movable part can reciprocate in the vibration direction.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: January 5, 2021
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yuki Takahashi, Kazutaka Sakaguchi, Yasutaka Kitamura, Shigeyuki Shimomura, Yuki Ogihara