Patents Assigned to Citizen Watch Co., Ltd.
  • Patent number: 10744567
    Abstract: The invention provides a control apparatus for a machine tool, which can perform reciprocating vibration in consideration of a vibration frequency, increase flexibility in machining a workpiece, and perform vibration cutting by means of an external spindle or the like without rotating a spindle. The control apparatus and the machine tool include control means. The control means includes an imaginary spindle regarded as a spindle for rotating a workpiece W or a cutting tool. The control means sets the number of rotations of the imaginary spindle and the number of reciprocating vibrations in accordance with a vibration frequency attributable to a cycle during which an operation instruction can be issued.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: August 18, 2020
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventors: Kazuhiko Sannomiya, Takaichi Nakaya
  • Patent number: 10744611
    Abstract: In a machine tool, under user set conditions, a cutting tool is fed in a feeding direction while the cutting tool is moved repetitively to cut a workpiece smoothly while separating chips easily. In the machine tool and a control apparatus thereof, control means is configured to set the number of rotations of relative rotation for executing machining of a workpiece, and the number of repetitions of repetitive movement during one rotation of the relative rotation in accordance with a repetitive movement frequency attributable to a cycle during which an operation instruction can be issued.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: August 18, 2020
    Assignees: Citizen Watch Co., Ltd., Citizen Machinery Co., Ltd.
    Inventors: Takaichi Nakaya, Kazuhiko Sannomiya, Hiroshi Shinohara
  • Publication number: 20200251037
    Abstract: A display system includes mobile devices each including a position detection unit that detects a position, a physical quantity detection unit that detects a physical quantity, a display unit that displays an image, and a process unit that can perform a process of controlling the display unit so that the image is displayed. The process unit can perform an overlapping display process in which the process unit controls the display unit so as to display a physical quantity image expressing the physical quantity detected by the physical quantity detection unit in a manner of overlapping on a travel route image expressing a travel route of the mobile device that is determined depending on the position detected by the position detection unit.
    Type: Application
    Filed: February 5, 2020
    Publication date: August 6, 2020
    Applicant: CITIZEN WATCH CO., LTD.
    Inventors: Ryutaro UEMURA, Daisuke MATSUOH, Toshinori OKAZAKI, Shoya KANEKO, Ayaka OHTAKE
  • Patent number: 10733875
    Abstract: Provided is a detection device for detecting inaudible sound waves generated by a user's bodily motion to identify the user's motion. The detection device includes: a detector detecting inaudible sound waves generated by a bodily motion; an acquiring unit acquiring burst information on at least one of the duration and frequency of a burst during which a cluster of pulses appears in a waveform of the inaudible sound waves detected by the detector; a memory storing reference information on reference values compared with the burst information, the reference values differing from each other depending on the types of bodily motions generating inaudible sound waves; and a determining unit comparing the burst information with the reference information to determine which of bodily motions has caused the inaudible sound waves detected by the detector.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: August 4, 2020
    Assignee: CITIZEN WATCH CO., LTD.
    Inventor: Hideki Shimizu
  • Publication number: 20200243733
    Abstract: It is made possible to use a lens array including common lenses as a lens array that collects beams of light from light-emitting units, regardless of the number of light-emitting elements included in each light-emitting unit, thereby reducing the manufacturing cost of a light-emitting device. The light-emitting device includes a substrate, light-emitting units arranged on the substrate, and a lens array including lenses provided corresponding to the light-emitting units, respectively, to collect beams of emission light from the respective light-emitting units, the lens array being arranged on the light-emitting units. Each of the light-emitting units has light-emitting elements that are mounted on the substrate in a lattice pattern and are series-parallel connected to one another in a mount region whose shape is common in the light-emitting units so as to include a predetermined number of series connections and a predetermined number of parallel connections which are set for the light-emitting unit.
    Type: Application
    Filed: June 17, 2016
    Publication date: July 30, 2020
    Applicants: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Sadato Imai, Kohsuke Kashitani, Teruhiko Hodohara
  • Publication number: 20200238465
    Abstract: A machine tool includes: a cutting tool; rotating means; feeding means; vibrating means for reciprocatingly vibrating the cutting tool and the workpiece relative to each another; and amplitude control means for controlling the amplitude of the reciprocating vibration by the vibrating means. The cutting process is carried out by rotation of the workpiece and the cutting tool relative to each other and feeding of the cutting tool accompanied by the reciprocating vibration with said amplitude in the machining feeding direction of the cutting tool, to thereby move the cutting tool along a predetermined movement path relative to the workpiece. The movement path comprises a plurality of divisional paths divided at predetermined coordinate positions on the movement path. The amplitude control means is adapted to set the amplitude individually for each of the divisional paths.
    Type: Application
    Filed: October 4, 2018
    Publication date: July 30, 2020
    Applicants: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventor: Takaichi NAKAYA
  • Patent number: 10724917
    Abstract: A pressure detection device includes: a cylindrical body made of a conductor; a pressure receiver made of a conductor, the pressure receiver being mounted to one end side of the body and receiving pressure from the outside; a signal generator arranged inside the body, the signal generator being electrically connected to the pressure receiver and generating a signal corresponding to the pressure received by the pressure receiver; and a cover made of an insulator with a lower thermal conductivity than thermal conductivities of the body and the pressure receiver, the cover continuously covering an outer surface of the pressure receiver and a portion of an outer surface of the body, the portion being located at a side closer to the pressure receiver.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: July 28, 2020
    Assignees: CITIZEN FINEDEVICE CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, CITIZEN WATCH CO., LTD.
    Inventors: Yusuke Satoh, Kazuo Takahashi, Aki Sudo, Keisuke Sasaki, Masakatsu Nagai
  • Patent number: 10718681
    Abstract: A pressure detecting device that detects the combustion pressure in an internal combustion engine includes: a piezoelectric element that outputs a charge signal corresponding to the pressure in a combustion chamber; and a mounting board on which are mounted an integrating circuit that integrates the charge signal outputted by the piezoelectric element and an amplifier circuit that amplifies a voltage signal obtained by integration. On the mounting board are provided: a power receiving terminal that receives a power-supply voltage from a controller; an output terminal that outputs an output signal after amplification to the controller; and a grounding terminal for making the ground of the controller and the mounting board common. Furthermore, in the mounting board, the grounding terminal and grounding ends of the integrating circuit and the amplifier circuit are connected by way of grounding ferrite beads.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: July 21, 2020
    Assignees: CITIZEN FINEDEVICE CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Yuta Kanamori, Tetsuya Aiba, Masanori Yomoyama, Satoshi Sue
  • Patent number: 10714460
    Abstract: A light-emitting device and a manufacturing method thereof are provided, which device yields light exhibiting an actual hue with a deviation reduced as much as possible from a designed hue value, the light being a mixture of light emitted from a plurality of light-emitting elements mounted densely and excited light from a phosphor contained in a resin sealing the light-emitting elements. The light-emitting device includes a board, a plurality of light-emitting elements mounted densely on the board, a first resin free from any phosphor, placed among the plurality of light-emitting elements, and a second resin containing a phosphor and covering an exposed part of the plurality of light-emitting elements.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: July 14, 2020
    Assignees: Citizen Electronics Co., Ltd., Citizen Watch Co., Ltd.
    Inventors: Sadato Imai, Masahide Watanabe, Hirohiko Ishii, Koki Hirasawa
  • Patent number: 10707189
    Abstract: A light-emitting device is provided whose color mixing property and light emission efficiency are improved, while white light with high color rendering performance is ensured by means of four kinds of LED elements emitting red, green, blue, and white light respectively.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: July 7, 2020
    Assignees: Citizen Electronics Co., Ltd., Citizen Watch Co., Ltd.
    Inventors: Masahiko Hamada, Hirohiko Ishii
  • Patent number: 10699855
    Abstract: An electronic switch includes a rubber sheet that includes a first surface, a second surface opposite to the first surface, and a convex portion on the first surface. The convex portion of the rubber sheet includes a semispherical shape.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: June 30, 2020
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Takahiro Arai
  • Publication number: 20200204087
    Abstract: A power generation system includes a power generation unit, a power storage unit, and a voltage step-down unit. The power generation unit includes a generation main body having an electrification film and a counter electrode rotating relative to each other to generate power, and an energy generator generating energy for rotating the electrification film and the counter electrode. The power storage unit stores output power of the power generation unit. The voltage step-down unit is electrically connected to the power generation unit and the power storage unit and reduces output voltage of the power generation unit to a step-down voltage. The step-down voltage obtained by dividing the most energy-efficiently generated output voltage of the power generation unit by a step-down ratio of the voltage step-down unit coincides with storage voltage corresponding to a region between first and second turning points on a discharge curve of the power storage unit.
    Type: Application
    Filed: December 19, 2019
    Publication date: June 25, 2020
    Applicant: CITIZEN WATCH CO., LTD.
    Inventors: Shogo Kimura, Akira Shiota, Makoto Watanabe, Akira Izumi
  • Patent number: 10671046
    Abstract: A numerical control device is for machining a machining object by moving a tool and the machining object relative to each other along a movement path while applying vibration, by use of a drive axis provided for the tool or the machining object. The device includes a storage unit that holds an invalid frequency region, and a vibration condition determining unit to determine a frequency for the vibration, based on a rotational speed of a main shaft for rotating the machining object, a number of vibrations of the vibration in each one rotation of the main shaft, and the invalid frequency region.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: June 2, 2020
    Assignees: Mitsubishi Electric Corporation, CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventors: Mitsuo Watanabe, Masakazu Sagasaki, Hitoshi Matsumoto, Takanori Shinohara, Kazuhiko Sannomiya, Yuki Hirata
  • Patent number: 10665445
    Abstract: A sample loading plate that includes at least one sample mounting spot that mount a sample thereon is provided with a substrate having a conductive surface and an insulating film that is laminated on the conductive surface of the substrate and that has at least an insulating surface, the insulating film being sparsely formed so that the conductive surface of the substrate is partially exposed at least in the sample mounting spot. Thus, a voltage applied to the sample loading plate can effectively place the sample in an electric field. As a result of which, in a mass spectrometric analysis of the sample, there is no charge up of the sample and appropriate ionization becomes possible.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: May 26, 2020
    Assignees: CITIZEN FINEDEVICE CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Kazuhiro Toriumi, Mitsunori Miyamoto, Satoru Fukumoto
  • Patent number: 10661349
    Abstract: An automatic lathe includes a main spindle that rotates a workpiece about a shaft center, a cutting tool that processes the workpiece, a feeder that moves the cutting tool, an input receiver that receives inputs regarding an eccentric distance and a radius, and a controller that controls the movement by the feeder such as to set a virtual circle having a radius of the distance, to set an offset virtual circle having a center at a position where a center of the virtual circle is offset from the shaft center of the workpiece in the radial direction of the workpiece by the radius, and to move the cutting tool along an circumference of the offset virtual circle in relation to a rotation of the workpiece by the main spindle. A hole is processed, which has the radius at a position away from the shaft center by the distance.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: May 26, 2020
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventor: Hikaru Takahashi
  • Publication number: 20200156200
    Abstract: A control device for a machine tool and a machine tool capable of easily performing cutting with vibration according to the amount of feed is provided. A control device (180) for a machine tool comprises a control means (181) for controlling the relative rotation and feeding of a cutting tool and a material, the control means performing control such that cutting is performed with vibrating the cutting tool relative to the material by combining a forward feed movement in the machining direction, in which the cutting tool machines the material, and a return movement in the counter-machining direction.
    Type: Application
    Filed: July 26, 2018
    Publication date: May 21, 2020
    Applicants: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventors: Takaichi NAKAYA, Hiroshi SHINOHARA
  • Patent number: 10648048
    Abstract: Provided is a hexavalent chromium treatment agent capable of penetrating inside of a leather and capable of reducing not only hexavalent chromium present in the vicinity of the surface of the leather but also hexavalent chromium present inside the leather into trivalent chromium. The hexavalent chromium treatment agent of the present invention comprises a hexavalent chromium-reducing compound capable of reducing hexavalent chromium into trivalent chromium, a nonionic surfactant, and an aqueous solvent. The hexavalent chromium-reducing compound preferably comprises an organic compound (A) that has a specific structure capable of acting to reduce hexavalent chromium into trivalent chromium, that has a hydroxyphenyl group, and that has no aldehyde groups and no carboxyl groups.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: May 12, 2020
    Assignee: CITIZEN WATCH CO., LTD.
    Inventor: Yuji Akao
  • Patent number: D885354
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: May 26, 2020
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Shinsuke Watanabe
  • Patent number: D892919
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: August 11, 2020
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.
    Inventor: Takeshi Nakatani
  • Patent number: D892920
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: August 11, 2020
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.
    Inventor: Takeshi Nakatani