Patents Assigned to Minebea Co., Ltd.
  • Patent number: 10498284
    Abstract: A motor drive controller includes: a control circuit that controls an AC current flowing in a motor; a frequency modulation unit that frequency-modulates a speed of the motor when the motor is driven at a predetermined speed; and a current effective value controller that decreases an effective value of the AC current flowing in the motor as the speed of the motor modulated by the frequency modulation unit becomes closer to a resonant frequency of the motor.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: December 3, 2019
    Assignee: Minebea Co., Ltd.
    Inventors: Shigeki Miyaji, Takayuki Matsui, Tetsuya Seki
  • Patent number: 10451442
    Abstract: A stator structure includes a stator core including a plurality of tooth sections, coils wound around the respective plurality of tooth sections via an insulator, and a first coil cover and a second coil cover that cover the coils from both sides in an axial direction of the stator core. The first coil cover and the second coil cover being coupled via the insulator.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: October 22, 2019
    Assignee: MINEBEA CO., LTD.
    Inventors: Hiroshi Abe, Naohiro Yamada, Mutsumi Matsuura
  • Publication number: 20190308218
    Abstract: A vibrator-mounted holder is attached to a casing of a vibration generator which moves a vibrator to generate a vibration when used. The vibrator-mounted holder includes a vibrator, a vibrator retention unit retaining the vibrator, a fixing unit fixed to a casing, and an arm. The vibrator includes a magnet having a plate shape parallel to a horizontal surface and a yoke arranged on the magnet. The arm connects the fixing unit to the vibrator retention unit, and supports the vibrator retention unit in a manner that the vibrator retention unit is displaceable with respect to the fixing unit. The yoke has a projecting portion which is projected downward and fixed to the vibrator retention unit. The arm is connected to a portion, at which the projecting portion is arranged, within the vibrator retention units.
    Type: Application
    Filed: May 21, 2019
    Publication date: October 10, 2019
    Applicant: MINEBEA CO., LTD.
    Inventor: Mikio UMEHARA
  • Patent number: 10432074
    Abstract: A vibrator unit capable of being attached to a housing of a vibration generator includes a vibrator including a magnet and a back yoke arranged on or above the magnet, and an elastic member. The elastic member includes a vibrator attachment part attached to the vibrator, a housing attachment part attached to the housing, and an arm part coupling the vibrator attachment part and the housing attachment part, said arm part displaceably supporting the vibrator attachment part at least in a horizontal direction with respect to the housing attachment part. The back yoke includes a planar part arranged on or above the magnet and a holding part bending the planar part toward the frame from the planar part. The vibrator attachment part is held and embraced by the holding part.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: October 1, 2019
    Assignee: MINEBEA CO., LTD.
    Inventors: Mikio Umehara, Yutaka Kamogi
  • Publication number: 20190273424
    Abstract: A vibrator includes a frame, a swing unit, and an elastic member. The swing unit is disposed within the frame and holds a magnet. The elastic member connects the swing unit and the frame. The swing unit is movable with respect to the frame while deforming the elastic member. The frame, the swing unit, and the elastic member are integrally molded with each other.
    Type: Application
    Filed: May 21, 2019
    Publication date: September 5, 2019
    Applicant: MINEBEA CO., LTD.
    Inventor: Manabu NAKAMURA
  • Publication number: 20190273425
    Abstract: A holder is used while attached to a chassis of a vibration generator that moves a vibrator to generate a vibration. The holder includes a vibrator retention unit retaining the vibrator, a fixed unit fixed to the chassis, and an arm. The arm connects the fixed unit and the vibrator retention unit, and the arm supports the vibrator retention unit while the vibrator retention unit can be displaced with respect to the fixed unit. The fixed unit, the arm, and the vibrator retention unit are integrally formed using resin.
    Type: Application
    Filed: May 20, 2019
    Publication date: September 5, 2019
    Applicant: MINEBEA CO., LTD.
    Inventors: Minoru KURODA, Makoto TANAKA
  • Patent number: 10396623
    Abstract: A motor includes: a motor shaft including a press-fitting surface; and a first annular projection group and a second annular projection group formed in the press-fitting surface of the motor shaft. The first annular projection group and the second annular projection group are separated from each other in an axial direction, a distance between an adjacent two of annular projections in the first annular projection group and a distance between an adjacent two of annular projections in the second annular projection group are smaller than a distance between the first annular projection group and the second annular projection group in the axial direction.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: August 27, 2019
    Assignee: Minebea Co., Ltd.
    Inventors: Makoto Otsuka, Yutaka Kamogi, Jun Ohmura
  • Patent number: 10378547
    Abstract: An axial flow fan includes an impeller having a hub and vanes disposed at equal intervals on an outer peripheral portion of the hub; a rotor shaft located at the center of the impeller; a motor portion rotating the impeller around the rotor shaft as an axis; a casing surrounding an outer periphery of the impeller; a base portion supporting the motor portion; and a stationary blade located in a blowout opening side of air flow, the stationary blade connecting the base portion and the casing, wherein the stationary blade has on its surface a guide portion allowing air flow flowing along the surface to be rectified and guided from a direction of the blowout opening to an outside.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: August 13, 2019
    Assignee: MINEBEA CO., LTD.
    Inventors: Atsushi Taroda, Yukihiro Higuchi, Tomoyoshi Sasajima
  • Patent number: 10350637
    Abstract: A vibrator-mounted holder is attached to a casing of a vibration generator which moves a vibrator to generate a vibration when used. The vibrator-mounted holder includes a vibrator, a vibrator retention unit retaining the vibrator, a fixing unit fixed to a casing, and an arm. The vibrator includes a magnet having a plate shape parallel to a horizontal surface and a yoke arranged on the magnet. The arm connects the fixing unit to the vibrator retention unit, and supports the vibrator retention unit in a manner that the vibrator retention unit is displaceable with respect to the fixing unit. The yoke has a projecting portion which is projected downward and fixed to the vibrator retention unit. The arm is connected to a portion, at which the projecting portion is arranged, within the vibrator retention units.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: July 16, 2019
    Assignee: MINEBEA CO., LTD.
    Inventor: Mikio Umehara
  • Patent number: 10316860
    Abstract: A centrifugal fan includes: a casing including an upper casing, a lower casing, and struts disposed between the upper casing and the lower casing; and an impeller that is provided in the casing, the impeller having an annular shroud, a plurality of blades, and a main plate, wherein the main plate of the impeller has an inclined surface between an inner circumference side and an outer circumference side of the impeller, and wherein the inner circumference side of the impeller is located at an upward position in an axial direction of the impeller, and the outer circumference side of the impeller is located at an downward position in the axial direction of the impeller.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: June 11, 2019
    Assignee: Minebea Co., Ltd.
    Inventors: Seiya Fujimoto, Kiyohisa Nara, Tetsuya Seki
  • Patent number: 10305357
    Abstract: A vibrator includes a frame, a swing unit, and an elastic member. The swing unit is disposed within the frame and holds a magnet. The elastic member connects the swing unit and the frame. The swing unit is movable with respect to the frame while deforming the elastic member. The frame, the swing unit, and the elastic member are integrally molded with each other.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: May 28, 2019
    Assignee: MINEBEA CO., LTD.
    Inventor: Manabu Nakamura
  • Patent number: 10298106
    Abstract: A holder is used while attached to a chassis of a vibration generator that moves a vibrator to generate a vibration. The holder includes a vibrator retention unit retaining the vibrator, a fixed unit fixed to the chassis, and an arm. The arm connects the fixed unit and the vibrator retention unit, and the arm supports the vibrator retention unit while the vibrator retention unit can be displaced with respect to the fixed unit. The fixed unit, the arm, and the vibrator retention unit are integrally formed using resin.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: May 21, 2019
    Assignee: MINEBEA CO., LTD.
    Inventors: Minoru Kuroda, Makoto Tanaka
  • Patent number: 10284046
    Abstract: There is provided a DC brush motor that is provided with: a magnet; an armature configured to rotate relative to the magnet about a rotary axis, the armature comprising a commutator; a bracket configured to cover one end portion of the magnet and the armature at one side along the rotary axis; a female terminal that is fixed to the bracket; a brush that is electrically connected to the female terminal, and a sealing member that is fixed to the bracket. The bracket is provided with a recessed portion formed on an outer periphery thereof and configured to accommodate therein the female terminal. The sealing member is configured to seal between the recessed portion and a space where the commutator and the brush exist.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: May 7, 2019
    Assignee: Minebea Co., Ltd.
    Inventors: Minoru Kuroda, Masami Ota
  • Patent number: 10283923
    Abstract: A resolver includes: a stator core; and an insulator that is mounted on the annular stator core, wherein a terminal pin base that extends outward in a radial direction is integrally formed in the insulator, wherein a plurality of terminal pins are disposed on the terminal pin base, wherein each of the terminal pins has a first connecting portion at one end and a second connecting portion at the other end, wherein first and second covers are provided on the terminal pin base at each sides in an axial direction, wherein the first connecting portion and the second connecting portion of the terminal pin are sealed in a filler which fills a first space and a second space, the first space being formed between the first cover and the terminal pin base, and the second space being formed between the second cover and the terminal pin base.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: May 7, 2019
    Assignee: Minebea Co., Ltd.
    Inventor: Takaaki Ochiai
  • Patent number: 10260510
    Abstract: A fan includes: a casing including a substantially cup-shaped base portion connected to an outer frame through a rib, the base portion having a top surface located on a upper side of an axial direction and a lower opening located on a lower side of the axial direction; a bearing housing hanging down from a center of the top surface of the base portion toward the lower opening; a stator housing portion formed by the base portion and the bearing housing; a stator having a circuit board disposed in the stator housing portion by being fitted to an outer peripheral surface of the bearing housing; bearings fitted to an inner peripheral surface of the bearing housing; an impeller rotating around a shaft as a central axis, shaft being rotatably supported by the bearings; and an insulating material filling the stator housing portion to cover the stator and the circuit board.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: April 16, 2019
    Assignee: MINEBEA CO., LTD.
    Inventor: Toru Narita
  • Patent number: 10256755
    Abstract: A motor drive controller including a monitoring unit monitoring whether or not a use state of a motor to be controlled satisfies a predetermined condition, and an output information switching unit switching information to be outputted to the outside from an information output path from motor driving information indicating a drive state of the motor to monitoring information indicating the use state if the use state satisfies the predetermined condition.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: April 9, 2019
    Assignee: MINEBEA CO., LTD.
    Inventors: Takamichi Kitano, Katsunori Yamamoto
  • Patent number: 10184806
    Abstract: A rotation angle detection device includes resolvers 2a and 2b for detecting the rotation angle of a rotating body, and a signal processing circuit 10 for processing the output signals of the resolvers. The signal processing circuit 10 includes a detection signal processing section 30 for obtaining, from the output signals of the resolvers, electrical angle signals A1 and A2 corresponding to the electrical angles of the resolvers, and an abnormality detection section 50 capable of detecting an abnormality of the input signal from at least one of the resolvers. The abnormality detection section 50 performs comparison determination processing for comparing the electrical angle signal A1 and the electrical angle signal A2 obtained from the resolvers at the same time, and comparison determination processing for comparing the electrical angle signals A1 and the electrical angle signals A2 in a continuous time series at time points.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: January 22, 2019
    Assignee: MINEBEA CO., LTD.
    Inventor: Takahiko Komatsu
  • Patent number: 10184610
    Abstract: A rotation range-limiting device 10 is provided with a rotation body 20 provided with a first surface and a carrying surface, and a stationary body 30 supporting the rotation body such that the rotation body is rotatable about a center point thereof. The stationary body has a second surface opposed to the first surface. One 212 of the first surface and the second surface is provided with an arc-shaped slide-guiding portion 24 whose center corresponds to the center point of the rotation body, and a slider 26 movable along the slide-guiding portion. The other 301 of the first surface and the second surface is provided with a locking portion 36, which projects toward the slide-guiding portion at a location on a circle having the same diameter as the slide-guiding portion such that it can abut against the slider.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: January 22, 2019
    Assignee: MINEBEA CO., LTD.
    Inventors: Hiroya Hoshi, Shinichi Fujisawa
  • Patent number: 10175139
    Abstract: A sensor information collecting apparatus includes: a sensor module including a sensor; a sensor amplifier; an acceleration sensor; a control unit; a power supply unit; an illumination unit; an illumination driver; and a battery, which supplies a battery voltage to the acceleration sensor, the control unit, and the power supply unit, wherein, when an acceleration level is equal to or more than a threshold value for data-storing, the control unit activates the sensor amplifier and controls the memory to store the detection data, and wherein, when the acceleration sensor detects an acceleration level which is less than the threshold value for data-storing and is equal to or more than a threshold value for data-transmitting, the control unit outputs an optical communication signal and the illumination driver controls the illumination unit to emit light, on which the optical communication signal is superimposed.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: January 8, 2019
    Assignee: Minebea Co., Ltd.
    Inventor: Shinichi Suzuki
  • Patent number: 10168470
    Abstract: A planar lighting device includes: a plurality of point light sources; a circuit board provided with the point light sources; a light guide plate including an end surface along which the point light sources are disposed in a facing manner and a surface to which a portion of a front end of the circuit board is fixed; and a fixing member that fixes the circuit board to the light guide plate. The fixing member includes: a plurality of small-piece double-sided adhesive members; and a single-sided adhesive member that integrates the plurality of small-piece double-sided adhesive members.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: January 1, 2019
    Assignee: MINEBEA CO., LTD.
    Inventor: Ippei Kusunoki