Patents Assigned to Citizen Watch Co., Ltd.
  • Patent number: 11376697
    Abstract: The tool holding device includes: a casing including a first surface, a second surface opposed to the first surface, and a first projection and a second projection projecting opposite to the first surface from the second surface; a first tool holding part disposed on the first surface at a position opposed to the first projection; a second tool holding part disposed on the first surface at a position opposed to the second projection; a driving-force input unit disposed at the end of the first projection and rotated by driving force being inputted; a first shaft extending in an axial direction perpendicular to the first surface and the second surface, the driving-force input unit and the first tool holding part being disposed at one end and the other end of the first shaft, respectively; a second shaft extending in the axial direction and having one end housed in the second projection, the second tool holding part being disposed at the other end of the second shaft; and a rotation transmitting unit rotating th
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: July 5, 2022
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventor: Kyota Kotake
  • Patent number: 11376865
    Abstract: A printer includes a print head portion for printing on a label paper, a feeding portion for feeding the label paper, a cutter portion for cutting the label paper, and a controller for controlling operations of the print head portion, the feeding portion, and the cutter portion. The label paper includes a bent portion that is generated in a portion right after unrolled from a label roll and changes in accordance with a label roll diameter. The controller is configured to control the feeding portion to feed the label paper by a constant length set in advance with respect to a predetermined label roll diameter so that a cutting operation by the cutter portion is performed at a position past a bent portion generated when the label roll diameter is larger than the predetermined diameter if the feeding operation for the label paper meets a predetermined condition set in advance.
    Type: Grant
    Filed: October 28, 2020
    Date of Patent: July 5, 2022
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN SYSTEMS JAPAN CO.
    Inventor: Yukihisa Kato
  • Patent number: 11375043
    Abstract: A program management system includes: a terminal device having a terminal processing unit capable of executing processing to create a computer program, and a terminal communication unit capable of transmitting the computer program created by the terminal processing unit to an outside; and an external device having an external device storage unit storing therein the computer program transmitted from the terminal device, and an external device processing unit capable of executing processing to give approval to the computer program stored in the external device storage unit. The external device storage unit stores therein appropriateness of approval of the computer program as first status information together with the computer program. The external device processing unit is capable of executing processing to manage the computer program based on the first status information.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: June 28, 2022
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Ryutaro Uemura, Daisuke Matsuoh
  • Publication number: 20220161339
    Abstract: A machine tool and a control device for the machine tool for shortening the machining time of a workpiece in a case where the relative and reciprocal vibration of workpiece holder and tool post in the radial direction of the workpiece is stopped during a period from an initial point until when the workpiece and the cutting tool come into contact with each other is provided.
    Type: Application
    Filed: May 22, 2020
    Publication date: May 26, 2022
    Applicants: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventor: Kazuhiko SANNOMIYA
  • Publication number: 20220161333
    Abstract: A machine tool (1) includes: a front spindle (10) having a front chuck (12); a rear spindle (20) having a rear chuck (22); a controller (50) configured to cause the rear chuck (22) to perform a fastening operation for fastening a work (W) fastened to the front chuck (12) to the rear chuck (22); and a detector (60) configured to detect an abnormality caused by the fastening operation by the rear chuck (22), based on measurement data associated with a vibration of at least one of the front chuck (12) and the rear chuck (22).
    Type: Application
    Filed: March 30, 2020
    Publication date: May 26, 2022
    Applicant: CITIZEN WATCH CO., LTD.
    Inventors: Atsushi INOUE, Masahiro MURAMATSU, Kenji NOGUCHI, Kohichi KAZAHARI
  • Patent number: 11338404
    Abstract: A machine tool and a control apparatus thereof include an amplitude control unit to control the amplitude of reciprocal vibration by a vibration unit. The amplitude control unit is configured to reduce the amplitude of the reciprocal vibration by the vibration unit as a cutting tool is fed in a feeding direction when the cutting tool reaches a predetermined cutting tool work stopping position on a workpiece in the feeding direction (Z-axis direction) to prevent the cutting tool from cutting the workpiece beyond the cutting tool work stopping position.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: May 24, 2022
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD
    Inventors: Kazuhiko Sannomiya, Takaichi Nakaya
  • Patent number: 11338386
    Abstract: Disclosed is a friction welding method including: a heating step wherein, in relation to joining surfaces (S1, S2) defined by opposite end surfaces of a pair of materials (W1, W2), the pair of materials (W1, W2) are moved from a state in which their axes are unaligned with each other, in a direction for aligning the respective axes with each other, to a prescribed position where the joining surfaces (S1, S2) are brought into contact with each other and friction heated; and a pressure contacting step wherein the pair of materials are brought into pressure contact with each other. The method is characterized in that the heating step and the pressure contacting step are carried out while rotating each of the materials (W1, W2) at the same rotation speed in the same direction, as seen from one side in the axial direction.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: May 24, 2022
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventor: Takaichi Nakaya
  • Patent number: 11342312
    Abstract: A light emitting device includes a first light emitting element, a second light emitting element, a first phosphor sheet containing a first phosphor and a third phosphor, and covering a top face of the first light emitting element, and a second phosphor sheet containing a second phosphor and a fourth phosphor, and covering a top face of the second light emitting element, wherein a peak wavelength of light which is wavelength-converted by the first phosphor or the third phosphor is equal to or less than a peak wavelength of light which is wavelength-converted by the second phosphor or the fourth phosphor.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: May 24, 2022
    Assignees: Citizen Electronics Co., Ltd., Citizen Watch Co., Ltd.
    Inventors: Yuki Suto, Jo Kinosita
  • Publication number: 20220126393
    Abstract: A machine tool includes a first spindle, a second spindle, and a joining means for joining the axial ends of workpieces gripped by the spindles to form a joined workpiece. The machine tool further includes an electric servomotor for moving the first spindle in the direction intersecting the axis of the first spindle, a current value detection means for detecting the current value of the electric servomotor, and a misalignment detecting means for detecting misalignment of a first workpiece and a second workpiece in the joined workpiece, based on the current value detected by the current value detection means when the joined workpiece gripped by the two spindles is rotated.
    Type: Application
    Filed: January 16, 2020
    Publication date: April 28, 2022
    Applicant: CITIZEN WATCH CO., LTD.
    Inventor: Ayako KITAKAZE
  • Patent number: 11306884
    Abstract: A planar light-emitting device having a linear light-emitter having a substrate extending in a predetermined direction, a first line and a second line including a plurality of light-emitting elements arranged along the predetermined direction on the substrate, the first line and the second line being arranged side by site along the predetermined direction with an interval, a first frame arranged on the substrate so as to surround the first line, a second frame arranged on the substrate so as to surround the second line, a first seal arranged inside the first frame for sealing the plurality of light-emitting elements, a second seal arranged inside the second frame for sealing the plurality of light-emitting elements, and a plurality of electrodes arranged on the substrate and electrically connected with the plurality of light-emitting elements, and a light guide plate having an incidence surface having a first flat portion facing to the first line, a second flat portion facing to the second line, a projecting
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: April 19, 2022
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Takashi Watanabe, Kazuya Ishihara
  • Patent number: 11303225
    Abstract: Provided is a small-sized electrostatic motor having a rotor capable of starting reliably to rotate forward. The electrostatic motor includes a rotor rotatable around a rotating shaft, charged portions formed radially around the rotating shaft on upper and lower surfaces of the rotor, first and second stators disposed to sandwich the rotor therebetween, and first sets and second sets of fixed electrodes respectively formed radially around the rotating shaft on the surfaces of the first and second stators facing the rotor and selectively energized according to drive pulses to rotate the rotor by electrostatic force generated between the charged portions and the fixed electrodes. The average number of sets of fixed electrodes simultaneously energized in one cycle of the drive pulses out of the first sets and second sets of fixed electrodes is equal to the average of the numbers of first sets and second sets of fixed electrodes.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: April 12, 2022
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Toshinari Maeda, Akira Izumi
  • Patent number: 11270855
    Abstract: The movable contact body for a switch includes at least one movable contact having an upwardly convex leaf-spring shape, a cover member disposed so as to cover an upper surface of the movable contact, and a holding member disposed so as to face a lower surface of the movable contact, the holding member having a contact through-hole through which a top portion of the movable contact can pass.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: March 8, 2022
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Hiroto Isoda, Satoshi Okuma, Soichiro Amano, Ken Ito
  • Patent number: 11256236
    Abstract: An abnormality detection device of a machine tool includes a plurality of vibration sensors mounted on a body of the machine tool at a plurality of positions; and a determination portion that determines an operation condition of the machine tool based on vibration information detected by the vibration sensors. The abnormality detection device detects abnormality of the machine tool according to determination information of the determination portion. The determination portion specifies a predetermined item whose machining accuracy lowers based on the mounted position of the vibration sensor that has detected abnormal vibration.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: February 22, 2022
    Assignees: Citizen Watch Co., Ltd., Citizen Machinery Co., Ltd.
    Inventors: Takaichi Nakaya, Yasuhiro Kera, Ayami Misono
  • Patent number: 11253924
    Abstract: A control device for a machine tool and a machine tool, for which settings of the number of vibrations per rotation become easy, is provided. The control device of the machine tool controls a relative rotation between a workpiece and a cutting tool and a relative reciprocal movement between the workpiece and the cutting tool in a feed direction to perform vibration cutting to the workpiece. The control device includes a control section for controlling a spindle headstock, a first tool post, and a second tool post, the workpiece W being installed on the spindle headstock, the first tool post being provided to be reciprocally movable along the feed direction with respect to the spindle headstock and installed with a first cutting tool for cutting the workpiece, and the second tool post being provided to be reciprocally movable along the feed direction with respect to the spindle headstock independently of the first tool post and installed with a second cutting tool for cutting the workpiece.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: February 22, 2022
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Ayako Kitakaze, Masahiro Muramatsu, Kenji Noguchi
  • Patent number: 11243518
    Abstract: A computer program production system, a computer program, and a production terminal instrument each cause a computer to execute service block selection processing of selecting a service block program from among selection candidate service block programs, trigger block selection processing of selecting a trigger block program from among selection candidate trigger block programs, action block selection processing of selecting an action block program from among selection candidate action block programs, and production processing of producing an application program by combining the selected block programs.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: February 8, 2022
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Daisuke Matsuoh, Ryutaro Uemura
  • Patent number: 11226593
    Abstract: An analog electronic watch includes watch's internal time, and controls rotation of a group of indicators based on the watch's internal time. A terminal appliance stops the rotation of the group of indicators, generates an image of the indicators and the dial plate with an imaging unit, detects current display positions of the group of indicators in identification areas as part of the image of the indicators and the dial plate, generates current display time information based on the current display positions, and generates display time correction information based on a difference between the current display time information and the watch's internal time information. The analog electronic watch corrects the display positions of the group of indicators based on the display time correction information. There are provided an analog electronic watch system and an analog electronic watch that can reduce a time required for display time correction.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: January 18, 2022
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Makoto Watanabe, Katsuyoshi Aihara, Daisuke Matsuoh, Daisuke Yamada, Ryutaro Uemura
  • Patent number: 11224952
    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: Grant
    Filed: October 4, 2018
    Date of Patent: January 18, 2022
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventor: Takaichi Nakaya
  • Publication number: 20210402483
    Abstract: A machine tool comprising: a first spindle; a second spindle provided on a rear headstock to face the first spindle; a barstock supply unit for supplying an elongate rod to the first spindle; and a processing means including a tool for processing the barstock, characterized in that the machine tool further comprises: a workpiece clamp device provided on the rear headstock and adapted to grip a second material comprised of the barstock that has been removed from the first spindle as an old material; and a joining means for joining opposite end portions of the second material gripped by the workpiece clamp device and of a first material gripped by the first gripping means and comprised of a barstock newly supplied by the barstock supply unit, thereby to integrate the second material and the first material into a single barstock.
    Type: Application
    Filed: October 24, 2019
    Publication date: December 30, 2021
    Applicants: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventors: Kenji NOGUCHI, Haruhiko MISONO, Toshiyuki SUZUKI
  • Patent number: 11207897
    Abstract: Provided are a printing jig for an inkjet-type printer and a method for manufacturing printed objects therewith, which jig can be easily produced in accordance with the shape and size of an object to be printed and allows the object to be accurately positioned relative to the printer. The printing jig supports an object to be printed, and is placed in an inkjet-type printer when the object is being printed. The printing jig includes a mounting surface on which the object is to be placed, and a positioning part for positioning the object. The positioning part includes a protrusion preformed on the mounting surface so as to be brought into contact with at least part of the object placed on the mounting surface. The protrusion is made of deposited and cured ink used by the inkjet-type printer.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: December 28, 2021
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Taku Takashina, Jindai Yamakawa
  • Publication number: 20210389747
    Abstract: A machine tool and a control device therefor, wherein vibration cutting of a workpiece is carried out by means of a tool and wherein, after the vibration cutting, finish-cutting is carried out for cutting a finishing allowance of the workpiece by means of the tool, without relative vibration between the workpiece and the tool, by relatively rotating the workpiece and the tool and relatively moving them in the feed direction. According to the invention, before the vibration cutting, a finishing allowance calculation means calculates a finishing allowance remaining on the workpiece after vibration cutting has been completed, and a determination means determines whether or not the finishing allowance as calculated by the finishing allowance calculation means is less than, or equal to a predetermined threshold value.
    Type: Application
    Filed: October 24, 2019
    Publication date: December 16, 2021
    Applicant: CITIZEN WATCH CO., LTD.
    Inventors: Kenji NOGUCHI, Hitoshi SAITO