Patents Assigned to Citizen Watch Co., Ltd.
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Patent number: 10895844Abstract: A gear train mechanism of a timepiece is formed by a gear having an involute tooth profile, which is easily manufactured, and a pinion that meshes with the gear. In order to reduce a fluctuation in torque to be transmitted, a gear train mechanism of a timepiece includes a gear including a tooth having a tooth profile of an involute curve and a pinion including a tooth meshing with the tooth of the gear to transmit and receive a torque, wherein the torque to be transmitted from the gear to the pinion is substantially constant at least in a part of a first half of a meshing period of the gear and the pinion.Type: GrantFiled: June 19, 2017Date of Patent: January 19, 2021Assignee: CITIZEN WATCH CO., LTD.Inventors: Tadahiro Fukuda, Shinpei Fukaya
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Publication number: 20210008630Abstract: A machine tool includes a spindle, a spindle X-axis moving mechanism for moving the spindle in an X-axis direction, a tool rest equipped with a cutting tool for machining a workpiece, and a tool rest X-axis moving mechanism for moving the tool rest in the X-axis direction, wherein the tool rest is provided with a swivel mechanism for causing swiveling the cutting tool. The machine tool further includes a calculating means for calculating a moving distance of the cutting tool in the X-axis direction when the cutting tool has swiveled by a desired swivel angle, and a control means for controlling the operation of the spindle X-axis moving mechanism such that the spindle is moved in the X-axis direction to follow the cutting tool in accordance with the moving distance.Type: ApplicationFiled: March 11, 2019Publication date: January 14, 2021Applicants: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.Inventor: Yosuke KOBAYASHI
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Publication number: 20210010122Abstract: A titanium member includes a first region where a plurality of first convex structural bodies extending in a first direction are arranged on the surface of the titanium member in a second direction orthogonal to the first direction, the first convex structural body has first convex portions arranged on an upper surface of the first convex structural body at an interval of several hundred nanometers along the first direction, and a height of the first convex portion is several ten nanometers. It is preferable that the first convex structural bodies adjacent in the second direction are arranged at an interval wider than the interval at which the first convex portions are arranged, and in the first convex structural bodies, a height including the first convex portion is higher than the height of the first convex portion.Type: ApplicationFiled: March 13, 2019Publication date: January 14, 2021Applicant: CITIZEN WATCH CO., LTD.Inventors: Kotaro TAKAZAKI, Masahiro SATOH
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Patent number: 10890879Abstract: Provided is an electronic clock including: a power generator; a secondary battery, which is to be charged with electric power generated by the power generator; a balance information transmitter configured to transmit, to a computer, balance information relating to a transition of a power generation amount or a charging balance of the secondary battery; a connection time period setting module configured to set a connection time period of a connection with the computer based on the balance information; and a communication controller configured to control a start and an end of communication to/from the computer based on the connection time period.Type: GrantFiled: March 15, 2017Date of Patent: January 12, 2021Assignee: CITIZEN WATCH CO., LTD.Inventors: Yusuke Hirota, Masayuki Araki, Akiyoshi Kondoh, Masato Kanazawa
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Publication number: 20200406369Abstract: A turret tool holder includes an engagement means having engaging elements on a turret side and a support base side, a clutch member for transmitting a driving power to a turret drive section, and a moving mechanism. The moving mechanism includes a rotatably supported drive shaft, a first feed screw mechanism and a second feed screw mechanism rotatable in response to the rotational drive of the drive shaft for moving the clutch member and the engagement elements, and a coordination mechanism arranged between the drive shaft and the first feed screw mechanism or the second feed screw mechanism, for moving the engaging elements in response to the rotational drive of the drive shaft, with a feed amount smaller than the feed amount of the clutch member.Type: ApplicationFiled: June 13, 2018Publication date: December 31, 2020Applicants: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.Inventor: Noriyoshi TAGUCHI
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Patent number: 10875331Abstract: An inner ribbon mounting opening is provided at a lower side of a cover member (202) that is rotatably connected with a housing (201), the cover member (202) housing a ribbon unit that holds an ink ribbon (302) held so as to be freely fed and freely taken up. An outer ribbon mounting opening (301) is further provided at an upper side. Thus, work can be performed from both directions above and below the cover member (202). As a result, work can be performed selectively using the outer ribbon mounting opening (301) or the inner ribbon mounting opening, and the workability for mounting and removing the ink ribbon can be enhanced.Type: GrantFiled: December 17, 2018Date of Patent: December 29, 2020Assignees: CITIZEN WATCH CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.Inventors: Yasuyuki Mori, Takehiro Kikui
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Patent number: 10870295Abstract: A printer includes support members having a convex portion and a support hole as two support portions, and a shaft that includes, in both end portions thereof, a concave portion and a projection portion as supported portions engaging with the support members, respectively, and supports an ink ribbon, the convex portion is rotatable, the convex portion is fitted into the concave portion, the convex portion includes a portion having a pentagonal truncated pyramid liked shape extending in an axis direction, the concave portion includes an inner circumference surface having a polygonal liked shape corresponding to the number of corners of the portion having the truncated pyramid liked shape, and includes a coil spring that elastically displaces the shaft in which the concave portion is formed in a withdrawing direction.Type: GrantFiled: September 25, 2018Date of Patent: December 22, 2020Assignees: CITIZEN WATCH CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.Inventors: Yasuyuki Mori, Katsutoshi Mukaijima
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Publication number: 20200393996Abstract: For improving the convenience of technology for processing data from a reading device with improved convenience, an information processing device having a communication function includes a controller unit configured to store reading data in a storage unit each time the reading data read by a reading device is received, and to transmit a plurality of the reading data stored in the storage unit to a terminal device when a first command is received from the terminal device.Type: ApplicationFiled: January 17, 2019Publication date: December 17, 2020Applicants: CITIZEN WATCH CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.Inventor: Akihiro KOSEKI
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Publication number: 20200379411Abstract: 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: ApplicationFiled: March 28, 2018Publication date: December 3, 2020Applicant: CITIZEN WATCH CO., LTD.Inventors: Makoto WATANABE, Katsuyoshi AIHARA, Daisuke MATSUOH, Daisuke YAMADA, Ryutaro UEMURA
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Patent number: 10850541Abstract: A printer includes a first cam that is configured to change a distance between a pair of rollers, i.e. a drive roller and a pinch roller, wherein the pair of rollers are disposed opposite to each other with a paper therebetween and at least one of the rollers is configured to feed the paper along a transfer path by its rotation, a second cam that is configured to change a distance between a head for printing on the paper and a platen roller, wherein the head and the platen roller are disposed opposite to each other with the paper therebetween, and a third cam that is configured to switch the transfer path for the paper to a discharging transfer path or a decurl transfer path that are formed as different transfer paths. The first cam, the second cam, and the third cam are connected to a same rotation axis.Type: GrantFiled: March 12, 2020Date of Patent: December 1, 2020Assignees: CITIZEN WATCH CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.Inventor: Akira Takahashi
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Patent number: 10840826Abstract: Provided is an electromechanical transducer including a lightweight and impact-resistant movable member. The electromechanical transducer using electrostatic interaction between charged portions and opposing electrodes to convert between electric power and motive power includes: a movable member having first electrodes and first grooves in a first surface thereof and having second grooves in a second surface opposite to the first surface; and a fixed substrate having second electrodes and facing the first surface of the movable member. One of the first electrodes and the second electrodes are charged portions carrying electrostatic charge while the other of the first electrodes and the second electrodes are opposing electrodes facing the charged portions. The first and second electrodes are each disposed at intervals in a moving direction of the movable member.Type: GrantFiled: September 26, 2017Date of Patent: November 17, 2020Assignee: CITIZEN WATCH CO., LTD.Inventor: Tomoo Ikeda
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Publication number: 20200354825Abstract: A black member includes a base and a black layer laminated on the base. The black layer contains titanium aluminum nitride, titanium silicon nitride, or titanium aluminum silicon nitride. The black layer may also contain at least one type of elements selected from the group consisting of oxygen, fluorine, and carbon. When the black layer contains carbon, and assuming that a total amount of elements contained in the black layer is 100 at %, the black layer contains carbon of 10 at % or less. In a color evaluation according to an L*, a*, b* color system (CIE color system), the black layer satisfies L*?48.0, ?2.0?a*?3.0, and ?3.5?b*?3.0.Type: ApplicationFiled: July 3, 2018Publication date: November 12, 2020Applicant: CITIZEN WATCH CO., LTD.Inventor: Kotaro TAKAZAKI
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Patent number: 10825963Abstract: Provided is a light-emitting device and a method for manufacturing the same which avoid a distinct color unevenness during the light emission even if variations are present among the light-emitting elements in the concentration of the phosphor that precipitates in the resin for sealing the light-emitting elements. The light-emitting device includes a substrate, a plurality of light-emitting elements that are mounted on the substrate, a first resin layer that integrally seals the light-emitting elements and includes a first phosphor that is excited by light from the light-emitting elements at a concentration that is high as it goes to a lower end near the substrate from an upper end distant from the substrate, and a second resin layer that is provided at an upper side of the first resin layer and includes a second phosphor that is excited by light from the light-emitting elements at a uniform concentration.Type: GrantFiled: August 19, 2019Date of Patent: November 3, 2020Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.Inventors: Sadato Imai, Tatsuya Katoh, Masahiro Watanabe, Kazuki Matsumura
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Publication number: 20200338644Abstract: Disclosed are threading device and threading method, including a turning step for threading a rotating workpiece with a predetermined cutting depth, by relatively moving a tool in the axial direction of the workpiece and then rounding-up the workpiece obliquely by relatively moving the tool in the axial direction and radially outward. The workpiece is subjected to the threading process by repeatedly carrying out the turning step while sequentially shifting the axial position for starting the rounding-up of the workpiece relative to an axial position where the rounding-up of the workpiece has been started in a previous turning step.Type: ApplicationFiled: June 21, 2018Publication date: October 29, 2020Applicants: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.Inventors: Hikaru TAKAHASHI, Tamotsu KATSUTA
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Patent number: 10814401Abstract: A vibration cutting insert includes a top surface having a rake face and a breaker face, a first side surface, a second side surface, and a bottom surface. In a cross section which includes a bisector of an angle formed between a first ridgeline and a second ridgeline when viewed in a direction from the top surface toward the bottom surface, and which is parallel to the direction from the top surface toward the bottom surface, a rake angle formed between the rake face and a plane parallel to the bottom surface has a positive angle. The angle formed between the first ridgeline and the second ridgeline is an acute angle. The rake face constitutes a cylindrical surface. The breaker face constitutes a flat surface.Type: GrantFiled: May 17, 2017Date of Patent: October 27, 2020Assignees: Sumitomo Electric Hardmetal Corp., Citizen Machinery Co., Ltd., Citizen Watch Co., Ltd.Inventors: Tomoyuki Fukuyama, Kazuhiko Sannomiya
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Patent number: 10801710Abstract: An LED lighting device capable of discharging heat generated from a light emitting element to the outside the LED lighting device. An LED lighting device includes: a plurality of light emitting elements; a mounted substrate on which the light emitting elements are mounted; and an electrode portion configured to supply a current to the light emitting elements from outside the LED lighting device. On the mounted substrate, a wiring substrate is located. On the upper surface of the mounted substrate, the mounted substrate includes: a light emitting region in which the plurality of light emitting elements are mounted; an exposed region which is located on the outer side of the light emitting region and through which the upper surface of the mounted substrate is exposed; and a wiring region which is located on the outer side of the light emitting region and in which the wiring substrate is located.Type: GrantFiled: May 22, 2017Date of Patent: October 13, 2020Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.Inventors: Takashi Iino, Sadato Imai
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Publication number: 20200319605Abstract: A radio wave watch includes: an exterior case; a dial plate disposed within the exterior case; a substrate disposed on a rear side of the dial plate within the exterior case; a first ground layer disposed on the substrate; an antenna that has a planar emitting electrode disposed between a center of the exterior case and an inner wall surface of the exterior case and opposed to the first ground layer, a planar short-circuit part electrically connecting an end part of the emitting electrode to the first ground layer, and a connecting part connecting the emitting electrode to a receiving circuit of the substrate; and a second ground layer disposed on an opposite side to the emission electrode side across the short-circuit part on the substrate and having a width equal to or greater than a width of the short-circuit part.Type: ApplicationFiled: September 18, 2018Publication date: October 8, 2020Applicant: CITIZEN WATCH CO., LTD.Inventors: Yoshiyasu WATANABE, Ken KITAMURA, Shuji NAKA, Akira KATO
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Patent number: D902875Type: GrantFiled: September 14, 2018Date of Patent: November 24, 2020Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.Inventors: Takuya Funakubo, Takeru Ohmori
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Patent number: D904208Type: GrantFiled: March 20, 2019Date of Patent: December 8, 2020Assignee: Citizen Watch Co., Ltd.Inventor: Marie Yoshida
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Patent number: D904989Type: GrantFiled: March 27, 2019Date of Patent: December 15, 2020Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.Inventors: Masahiro Watanabe, Shingo Kuriki, Kazuki Matsumura