Patents Assigned to Minebea Co., Ltd.
  • Polygon mirror scanner motor
    Patent number: 9541754
    Abstract: There is provided a polygon mirror scanner motor including: a rotor configured to rotate around a rotation axis; a fitting member configured to be fitted to an outer circumferential surface of the rotor; and a polygon mirror configured to be fitted to the outer circumferential surface of the rotor and bonded with the fitting member, wherein a diameter of the rotor at a part, to which the fitting member is fitted, is configured to be smaller than a diameter of the rotor at a part, to which the polygon mirror is fitted.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: January 10, 2017
    Assignee: Minebea Co., Ltd.
    Inventor: Masaki Goto
  • BOLT SENSOR
    Publication number: 20170003118
    Abstract: There is provided a bolt sensor which detects a fastened state of a bolt. The bolt sensor includes a sensor body including a through hole into which a shaft of the bolt is to be inserted, a light guide extending along an outer periphery of the sensor body, and a light source configured to emit light to the light guide based on output of the sensor body.
    Type: Application
    Filed: June 16, 2016
    Publication date: January 5, 2017
    Applicant: MINEBEA CO., LTD.
    Inventors: Takayori HASHIMOTO, Takuya KITAJIMA
  • Illumination apparatus having light guide plate with curvedly tapered light coupling portion
    Patent number: 9535204
    Abstract: An illumination apparatus includes a light source, and a light guide plate having an emitting surface and a light incident portion including a curved surface, and decreasing in thickness from the light source side towards the emitting surface. The curved surface has an S-shape as viewed from a side, with a convex portion on the light source side and a concave portion on the emitting surface with an inflection point in between, but closer to the emitting surface than to the source side.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: January 3, 2017
    Assignee: MINEBEA CO., LTD.
    Inventor: Toru Kunimochi
  • Resolver
    Patent number: 9534940
    Abstract: A resolver can have a stator installed in a housing simply, without requiring a special jig. In the resolver including a housing and a stator core fixed in the housing, the stator core is fixed to the inside of the housing by rotating relative to the housing.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: January 3, 2017
    Assignee: MINEBEA CO., LTD.
    Inventors: Takaaki Ochiai, Shumei Shirayanagi, Fujito Kawai
  • Concentricity-optimized tool clamping system for dental angled handpieces and dental turbines
    Patent number: 9526589
    Abstract: A clamping device for a dental tool in a dental turbine handpiece having at least one clamping lever. The clamping lever permits a tool shank to be clamped. The structure allows for more accurate relative positioning and improved concentricity of the dental tool after clamping.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: December 27, 2016
    Assignee: MINEBEA CO., LTD.
    Inventor: Juergen Bossler
  • Control method for vibration generator and vibration generator
    Patent number: 9525379
    Abstract: A control method for a vibration generator is provided. The vibration generator includes a fixed part around which a coil is wound, a movable part having a magnet, a bridge part movably supporting the movable part, and a power supply unit which applies an alternating current of a predetermined frequency to the coil. The power supply unit starts at the time of startup by the alternating current with a starting frequency which differs from a resonance frequency of the movable part, and the power supply unit changes the frequency of the applied alternating current to the resonance frequency of the movable part when the amount of vibration at the starting frequency reaches a predetermined ratio with respect to a saturation vibration amount of the resonance frequency.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: December 20, 2016
    Assignee: Minebea Co., Ltd.
    Inventors: Mikio Umehara, Yutaka Kamogi
  • Flange and resolver assembly
    Patent number: 9518843
    Abstract: A resolver has a structure in which the resolver is attached to a flange by press-fitting and in which strong stress that affects an angle detecting accuracy of a stator of the resolver is not applied. The flange, in which a resolver is press-fitted, includes a cylindrical portion in which a stator of the resolver is press-fitted to the inside thereof, and a tabular portion which is larger than an outer diameter of a cylindrical portion viewed from an axial direction and which is integrated with the cylindrical portion, wherein a clearance portion having an expanded inner diameter which does not contact with an outer periphery of the stator of the resolver is provided on an overlapped portion of a cylindrical portion viewed from a vertical direction to the axis and the tabular portion.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: December 13, 2016
    Assignee: MINEBEA CO., LTD.
    Inventors: Ryo Fukushima, Toshinori Chino
  • Water leakage detection device
    Patent number: 9518889
    Abstract: There is provided a water leakage detection device including a water leakage detection unit which is configured to detect water leakage, a water leakage detection circuit unit which is configured to be driven by a DC voltage from a DC power source and apply an AC voltage for detecting water leakage to the water leakage detection unit, and is configured to determine whether water is leaking based on a detection signal of the water leakage detection unit. The water leakage detection unit includes an insulating transformer having a primary side and a secondary side, the second side being connected to the water leakage detection unit, and a water leakage detection determining unit which is connected to the primary side of the insulating transformer.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: December 13, 2016
    Assignee: Minebea Co., Ltd.
    Inventors: Shigemi Masuda, Toshikazu Koshiba
  • Display device
    Patent number: 9521767
    Abstract: A display device is provided and includes: a display portion; a storage member configured to house the display portion and including an opening through which the display portion passes; a plurality of cover members configured to cover the opening and to travel from the opening to a region of the storage member adjacent to the opening so as to be folded up and overlapped with each other at the region; and travel control means configured to cause the plurality of cover members to transfer to a first condition in which the opening is closed by the plurality of cover members and also to a second condition in which the plurality of cover members are folded up and overlapped with each other.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: December 13, 2016
    Assignee: Minebea Co., Ltd.
    Inventor: Yasukazu Yomogita
  • AUTHENTICATION SYSTEM, AUTHENTICATION METHOD, SERVER DEVICE, AND CLIENT DEVICE
    Publication number: 20160352716
    Abstract: A server device of an authentication system includes: an optical signal communication unit that causes optical signal transmitters to repeatedly transmit modulated optical signals, by notifying, of pieces of partial authentication information stored in an authentication information management unit, the optical signal transmitters respectively related to the pieces of partial authentication information; and an authentication processing unit that authenticates, when authentication is requested from a client device, the client device, based on integrated authentication information notified with the request, and integrated authentication information before being segmented into the respective pieces of partial authentication information notified by the optical signal communication unit.
    Type: Application
    Filed: April 20, 2016
    Publication date: December 1, 2016
    Applicant: Minebea Co., Ltd.
    Inventor: Kunihiko HATTA
  • PLANAR ILLUMINATION DEVICE
    Publication number: 20160341889
    Abstract: A planar illumination device according to an embodiment, including: a light guiding plate having one of a pair of opposite principal surfaces serving as a light emission surface; a light source arranged at a side surface connecting end edges of the pair of principal surfaces of the light guiding plate; and a frame, in which the light guiding plate is arranged. The frame is formed of plural frame members arranged along side surfaces of the light guiding plate. The plural frame members are configured to include a resin frame member and a metal frame member, and to have a joint portion between the resin frame member and the metal frame member, the joint portion arranged at end portions of the resin frame member and the metal frame member.
    Type: Application
    Filed: May 16, 2016
    Publication date: November 24, 2016
    Applicant: MINEBEA CO., LTD.
    Inventors: Naoyuki TERADA, Ippei KUSUNOKI
  • Pivot assembly bearing and disk drive device
    Patent number: 9500233
    Abstract: A pivot assembly bearing includes: a sleeve, a shaft inserted into the sleeve, a pair of rolling bearings disposed between the sleeve and the shaft such that the rolling bearings are separated apart from each other in an axial direction. The rolling bearings include an inner ring fixed to the shaft, an outer ring fixed to the sleeve, and a rolling element provided between the inner ring and the outer ring. In at least one of the rolling bearings, a first sealing member contacts an end face of the outer ring facing an outer side in the axial direction. Thus, a first labyrinth gap between the first sealing member and an end face of the inner ring facing the outer side in the axial direction, and a second labyrinth gap between the first sealing member and the shaft are formed.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: November 22, 2016
    Assignee: MINEBEA CO., LTD.
    Inventors: Kunihiro Tsuchiya, Tadashi Uchida
  • PLANAR ILLUMINATION DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE
    Publication number: 20160334567
    Abstract: A planar illumination device according to an embodiment includes a light guiding plate, a light source, an optical sheet and a frame. The light guiding plate has one of a pair of opposite principal surfaces serving as a light emission surface. The light source is arranged at a side surface. The optical sheet is arranged on a side of the light emission surface. The frame includes a side wall arranged along a side surface and has an overlap portion formed therein, where the optical sheet and the side wall of the frame overlap each other at least partially and where an upper end surface of the side wall is arranged below a lower surface of the optical sheet and covered by the optical sheet at least partially. The adhesive sheet is stuck over an upper surface of the optical sheet and an outer surface of the side wall.
    Type: Application
    Filed: May 2, 2016
    Publication date: November 17, 2016
    Applicant: MINEBEA CO., LTD.
    Inventor: Toru KUNIMOCHI
  • Illuminating apparatus
    Patent number: 9494300
    Abstract: An illuminating apparatus includes a light source and an optical member that is disposed in front of the light source and controls light distribution of light emitted from the light source. The optical member has a pair of principal surfaces, and a plurality of prisms extending in one direction are provided on at least one among the pair of principal surfaces. The plurality of prisms include a plurality of reflecting prisms that are provided in a first region A among two regions divided at a virtual plane including a reference axis and emit light entered upon reflecting it at a reflecting surface and a plurality of refracting prisms that are provided in a second region among the two regions and emit light entered upon refracting it at a refracting surface.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: November 15, 2016
    Assignee: MINEBEA CO., LTD.
    Inventors: Ryohei Takayama, Hideki Kato
  • Fluid bearing, motor and polygon mirror scanner motor
    Patent number: 9494187
    Abstract: There is provided a fluid bearing including: a sleeve having a bearing hole; a shaft being inserted into the bearing hole to be rotatable with respect to the sleeve; a thrust portion that is fixed to the sleeve and covers one end portion of the bearing hole; and a liquid filled in a gap between the sleeve and the shaft. The bearing hole is configured to have a first portion having a first diameter; a second portion that is located at an end portion that is closer to the thrust portion than the first portion, the second portion having a second diameter that is substantially the dame with the first diameter; and a groove that is located at a position between the first portion and the second portion.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: November 15, 2016
    Assignee: Minebea Co., Ltd.
    Inventors: Katsunori Sakuragi, Michiharu Yamamoto, Shuji Akiyama
  • Structure for mounting resolver
    Patent number: 9488462
    Abstract: A structure for mounting a resolver in a housing, in which it is not necessary to use various different plates for forming the stator and accuracy of concentricity of the rotor and the stator is prevented from decreasing by a simple structure, are provided. The structure for mounting a resolver in a housing has a rotor and a stator arranged the outside of the rotor, in which the stator is mounted at an opening of the housing by clamps, projections are formed on an outer peripheral surface of the stator, protruding portions are formed on the clamps, and the stator is pressed to the housing by the clamps in a state in which the protruding portions are engaged with the concavities of the stator.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: November 8, 2016
    Assignee: MINEBEA CO., LTD.
    Inventors: Haruki Otobe, Mutsumi Matsuura
  • Resolver
    Patent number: 9488506
    Abstract: A resolver can have a stator installed in a housing simply, without requiring a special jig. In the resolver including a housing and a stator core fixed in the housing, the stator core is fixed to the inside of the housing by rotating relative to the housing.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: November 8, 2016
    Assignee: MINEBEA CO., LTD.
    Inventors: Takaaki Ochiai, Shumei Shirayanagi, Fujito Kawai
  • COOLANT APPLICATION DEVICE
    Publication number: 20160318143
    Abstract: A coolant application device includes a nozzle which spouts coolant and a motor which adjusts the rotation angle of the nozzle. The coolant application device also includes a housing, a hollow shaft rotatively and fluid-tightly inserted into the housing, a coolant passage formed in the hollow shaft, a port arranged at a lateral wall of the hollow shaft and communicating with the coolant passage, and an inlet passage arranged in the housing and communicating with the coolant passage through the port. The nozzle is connected to the hollow shaft and communicates with the coolant passage. The hollow shaft is coaxially arranged and directly connected to an output shaft of the motor.
    Type: Application
    Filed: July 13, 2016
    Publication date: November 3, 2016
    Applicant: MINEBEA CO., LTD.
    Inventors: Hideyuki OGIHARA, Masao KATO
  • Ultraviolet curable resin composition, sliding member, and method for producing sliding member
    Patent number: 9481847
    Abstract: There is provided a resin composition for a machinable liner of a sliding member. An ultraviolet curable resin composition for a self-lubricating liner contains a (meth)acrylate compound having an isocyanuric acid ring represented by the following formula and PTFE as a solid lubricant. In the formula (1), X is a group which contains an acryloyl group and is composed only of C, H, and O. Y and Z are groups each composed only of C, H, and O. PTFE is contained in an amount of 10 to 50% by weight with respect to a total amount of the ultraviolet curable resin composition. The ultraviolet curable resin composition is suitable for a self-lubricating liner 24 of a spherical bearing 20 having an outer race 22 and an inner race 26.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: November 1, 2016
    Assignee: MINEBEA CO., LTD.
    Inventors: Tadahiko Karaki, Kunihiro Matsumoto, Koichiro Sagiyama
  • Single phase brushless motor
    Patent number: 9484774
    Abstract: A single-phase brushless motor has both superior start-up stability and low cogging torque. In the outer-rotor-type single-phase brushless motor, when a gap width between the rotor and one edge of the salient pole surface is defined as d1, a gap width between the rotor and the other edge of the salient pole surface is defined as d2, and a minimum gap width between the rotor and the salient pole surface is defined as d3, the formula d3<d1<d2 is satisfied, and the gap width is d3 at a position shifted toward the one edge of the salient pole surface from the center of the arc shape which forms the salient pole surface.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: November 1, 2016
    Assignee: MINEBEA CO., LTD.
    Inventors: Yuji Omura, Tomoaki Nakano, Masaaki Nishizawa, Takahiro Sakaguchi, Shinichi Uchikawa, Tomoyuki Tsukada