Patents Assigned to Jeco Co.
  • Patent number: 10859182
    Abstract: A shaft-integrated gear includes a rotational shaft formed of a resin material; and a cylindrical gear that is formed of a metal material, wherein the cylindrical gear fits around a gear support part of the rotational shaft.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: December 8, 2020
    Assignees: Jeco Co., Ltd., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hikoshi Izumi, Kazuya Sato, Taiki Miyokawa, Tomoki Mabuchi, Youichiro Ogata
  • Patent number: 10498098
    Abstract: A slip ring for use in a slip ring brush type rotation sensor device, includes a metal ring having an approximately cylindrical shape, and a resin ring that supports the metal ring. Slits extending in an axial direction are formed in respective side surfaces on outer peripheries of the metal and resin rings. The metal ring includes a common part formed on a side surface at one end along the axial direction of the approximately cylindrical shape and segmented by the slits into segments to form common regions, so that adjacent common regions are electrically connectable to each other, and a detection part formed on a side surface at the other end and segmented by the slits into segments to form conducting regions and isolated regions that are alternately provided with the slit interposed between adjacent conducting and isolated regions.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: December 3, 2019
    Assignee: Jeco Co., Ltd.
    Inventors: Taiki Miyokawa, Hikoshi Izumi, Noboru Watanabe
  • Patent number: 8651679
    Abstract: A display device includes a first light guide member provided with a first reflecting surface formed at its first end to reflect light emitted by a light source; a second light guide member provided with a penetrating hole in which the first light guide member is intended to be inserted and a second reflecting surface formed at its first end to reflect the light; a first pointer and a second pointer fixed to the first end of the first light guide member and the first end of the second light guide member to be illuminated by the light reflected by the first reflection surface and the second reflection surface, respectively, and a driving member configured to separately rotate the first light guide member and the second light guide member around a same rotation axis with the first pointer and the second pointer, respectively.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: February 18, 2014
    Assignee: Jeco Co., Ltd.
    Inventors: Hiroyuki Shimane, Hirohisa Tanaka, Akio Ito, Kazuya Sato
  • Publication number: 20130094175
    Abstract: A display device includes a first light guide member provided with a first reflecting surface formed at its first end to reflect light emitted by a light source; a second light guide member provided with a penetrating hole in which the first light guide member is intended to be inserted and a second reflecting surface formed at its first end to reflect the light; a first pointer and a second pointer fixed to the first end of the first light guide member and the first end of the second light guide member to be illuminated by the light reflected by the first reflection surface and the second reflection surface, respectively, and a driving member configured to separately rotate the first light guide member and the second light guide member around a same rotation axis with the first pointer and the second pointer, respectively.
    Type: Application
    Filed: March 14, 2012
    Publication date: April 18, 2013
    Applicant: Jeco Co., Ltd.
    Inventors: Hiroyuki Shimane, Hirohisa Tanaka, Akio Ito, Kazuya Sato
  • Patent number: 7411382
    Abstract: A current detection apparatus includes a magnetic core having a ring shape with a gap and a center opening portion through which a current path is disposed, and a magnetic sensor including a magnetic sensing element such as a Hall effect element arranged in the gap. When a current flows through the current path, the magnetic core generates magnetic flux therein so that magnetic field is generated in the gap. The magnetic sensor outputs different electrical signals, each of which is measured in a different measurement range and corresponds to intensity of the magnetic field in the gap. The current detection apparatus measures the current based on the electrical signals outputted from the magnetic sensor.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: August 12, 2008
    Assignees: DENSO CORPORATION, Jeco Co., Ltd.
    Inventors: Yukihiko Tanizawa, Seiichirou Ootake, Takashige Saitou, Masahiro Aratani, Takeshi Tukamoto, Masato Ishihara, Norio Miyahara
  • Patent number: 7366619
    Abstract: A signal processing unit includes an integrating unit. The integrating unit is composed of a plurality of digital elements and is operative to integrate a detection signal over every quarter of one cycle of the detection signal to generate an integration value. The integration values to be generated are represented as S1, S2, S3, and S4. A calculating unit includes a plurality of digital elements and performs addition and subtraction on the generated integration values in accordance with the following equations used to calculate an in-phase component and a quadrature-phase component of (Ip=S4p?3+S4p?2?S4p?1?S4p) and (Qp=S4.4?S4p??S4p?1+S4p). Where Ip represents the in-phase component and Qp represents the quadrature-phase component. An amplitude obtaining unit obtains an amplitude of the detection signal based on the in-phase component and the quadrature-phase component.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: April 29, 2008
    Assignees: DENSO CORPORATION, Jeco Co., Ltd.
    Inventors: Takamoto Watanabe, Sumio Masuda
  • Publication number: 20070203666
    Abstract: A signal processing unit includes an integrating unit. The integrating unit is composed of a plurality of digital elements and operative to integrate a detection signal over every quarter of one cycle of the detection signal to generate an integration value. The integration values to be generated are represented as S1, S2, S3, S4 . . . . A calculating unit includes a plurality of digital elements and performs addition and subtraction on the generated integration values in accordance with the following equations to calculate an in-phase component and a quadrature-phase component: Ip=S4p?3+S4p?2?S4p?1?S4p Qp=S4p?3?S4p?2?S4p?1+S4p where Ip represents the in-phase component, Qp represents the quadrature-phase component, and p=1, 2, 3 . . . . An amplitude obtaining unit obtains an amplitude of the detection signal based on the in-phase component and the quadrature-phase component.
    Type: Application
    Filed: August 10, 2006
    Publication date: August 30, 2007
    Applicants: DENSO CORPORATION, JECO CO., LTD.
    Inventors: Takamoto Watanabe, Sumio Masuda
  • Publication number: 20070177690
    Abstract: In a radio-controlled device for measuring time, a demodulating unit demodulates the time information from the received electric signal based on amplitude information of the target radio wave. The amplitude information is obtained from in-phase and quadrature-phase components of the target radio wave. A phase calculator calculates phase data associated with a phase of the target radio wave based on the in-phase and quadrature-phase components. A variability calculator calculates a variability of the phase data of the target radio wave relative to a reference phase. The reference phase changes at a constant rate in time according to a frequency error. The frequency error is contained in the reference signal relative to a frequency of the target carrier wave. A reception determining unit determines whether reception of the radio-controlled device is good based on the calculated variability.
    Type: Application
    Filed: January 30, 2007
    Publication date: August 2, 2007
    Applicants: DENSO CORPORATION, JECO CO., LTD.
    Inventors: Takamoto Watanabe, Sumio Masuda
  • Publication number: 20060232262
    Abstract: A current detection apparatus includes a magnetic core having a ring shape with a gap and a center opening portion through which a current path is disposed, and a magnetic sensor including a magnetic sensing element such as a Hall effect element arranged in the gap. When a current flows through the current path, the magnetic core generates magnetic flux therein so that magnetic field is generated in the gap. The magnetic sensor outputs different electrical signals, each of which is measured in a different measurement range and corresponds to intensity of the magnetic field in the gap. The current detection apparatus measures the current based on the electrical signals outputted from the magnetic sensor.
    Type: Application
    Filed: April 6, 2006
    Publication date: October 19, 2006
    Applicants: DENSO CORPORATION, Jeco Co., Ltd.
    Inventors: Yukihiko Tanizawa, Seiichirou Ootake, Takashige Saitou, Masahiro Aratani, Takeshi Tukamoto, Masato Ishihara, Norio Miyahara
  • Publication number: 20060222109
    Abstract: A radio wave timepiece A and a quadrature detection device for executing a quadrature detecting method are disclosed including a receiving antenna 14 for receiving a carrier wave of a long wave standard radio wave on which time information is multiplexed, a quadrature detection circuit 18 for performing quadrature detection of the carrier wave in response to a reference clock CK1, commonly used for timekeeping by a time counter 8, to obtain an in-phase component I and a quadrature component Q of the carrier wave for obtaining an amplitude AN,m of the carrier wave, and a time correction means 22, 24, 26 for obtaining time information depending on the amplitude of the carrier wave from the quadrature detection circuit 18. The time counter 8 is responsive to time information delivered from the time correction means to correct current time.
    Type: Application
    Filed: March 30, 2006
    Publication date: October 5, 2006
    Applicants: DENSO CORPORATION, JECO CO., LTD.
    Inventors: Takamoto Watanabe, Sumio Masuda
  • Patent number: 6965178
    Abstract: A yoke is substantially cylindrical and has an opening portion. A brush holder member is secured to the opening portion of the yoke. The brush holder member retains a pair of supply brushes. A housing member is secured to the opening portion of the yoke on the outside of the brush holder member and covers the opening portion. A pair of securing pieces is formed integrally with the yoke. The securing pieces secure the brush holder member and the housing member to the yoke.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: November 15, 2005
    Assignees: Asmo Co., Ltd., Jeco Co., Ltd.
    Inventors: Terumitsu Takahashi, Masashi Yamamura, Kazutoshi Ito, Hikoshi Izumi, Kenji Matsushima, Makoto Iizuka
  • Patent number: 6856066
    Abstract: A brush device has a brush that slides against an outer circumferential surface of a cylindrical rotor. The brush device includes a base member, a terminal retained by the base member, an electric wire, which connects the brush to the terminal, and a cylindrical brush holder. The brush holder is located on the base member. The brush holder has a holder axis, which extends along the radial direction of the rotor. The brush is accommodated in and retained by the brush holder and is movable along the holder axis. The brush holder has an opening portion, which is formed at the outer portion of the brush holder with respect to the radial direction of the rotor. The opening portion permits the brush to pass along a direction perpendicular to the holder axis.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: February 15, 2005
    Assignees: JECO Co., Ltd., ASMO Co., Ltd.
    Inventors: Terumitsu Takahashi, Masashi Yamamura, Kazutoshi Ito, Hikoshi Izumi, Kenji Matsushima, Makoto Iizuka
  • Publication number: 20040046480
    Abstract: A yoke is substantially cylindrical and has an opening portion. A brush holder member is secured to the opening portion of the yoke. The brush holder member retains a pair of supply brushes. A housing member is secured to the opening portion of the yoke on the outside of the brush holder member and covers the opening portion. A pair of securing pieces is formed integrally with the yoke. The securing pieces secure the brush holder member and the housing member to the yoke.
    Type: Application
    Filed: July 16, 2003
    Publication date: March 11, 2004
    Applicants: ASMO CO., LDT., JECO CO., LTD.
    Inventors: Terumitsu Takahashi, Masashi Yamamura, Kazutoshi Ito, Hikoshi Izumi, Kenji Matsushima, Makoto Iizuka
  • Publication number: 20040012295
    Abstract: A brush device has a brush that slides against an outer circumferential surface of a cylindrical rotor. The brush device includes a base member, a terminal retained by the base member, an electric wire, which connects the brush to the terminal, and a cylindrical brush holder. The brush holder is located on the base member. The brush holder has a holder axis, which extends along the radial direction of the rotor. The brush is accommodated in and retained by the brush holder and is movable along the holder axis. The brush holder has an opening portion, which is formed at the outer portion of the brush holder with respect to the radial direction of the rotor. The opening portion permits the brush to pass along a direction perpendicular to the holder axis.
    Type: Application
    Filed: July 16, 2003
    Publication date: January 22, 2004
    Applicants: ASMO CO., LTD., JECO CO., LTD.
    Inventors: Terumitsu Takahashi, Masashi Yamamura, Kazutoshi Ito, Hikoshi Izumi, Kenji Matsushima, Makoto Iizuka
  • Patent number: 5793208
    Abstract: A magnetic sensor includes a magnetic core, an excitation coil, an oscillator and an excitation circuit, a detection coil, and a latch circuit. The excitation coil is wound on the magnetic core. The oscillator and the excitation circuit repeatedly supply a rectangular wave excitation current having a given polarity to the excitation coil. The detection coil is wound on the magnetic core on which the excitation coil has been wound. The detection coil generates an output signal having peaks of opposite polarities corresponding to magnitudes of a target measurement magnetic field in response to leading and trailing edges of the rectangular wave excitation current.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: August 11, 1998
    Assignee: Jeco Co., Ltd.
    Inventor: Akio Ito
  • Patent number: 5753872
    Abstract: In an acceleration switch, a magnetic contact opening/closing member is disposed at a horizontal initial position above a holding member. The end portion of the contact opening/closing member is pushed upward from the initial position by a ball that rolls along the tilt surface of the holding member with an inertia. First and second leaf springs are disposed to oppose each other on rolling and non-rolling sides of the ball through the holding member, and have upper free ends for sandwiching two end portions of the contact opening/closing member at the initial position. At least the first leaf spring is made of a conductive material and imparted with properties to swing in a direction to come close to the second leaf spring. When the contact opening/closing member is at the initial position, the first leaf spring is pressed by the contact opening/closing member in a direction to come close to an electrode plate against the swing properties and comes into contact with the electrode plate.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: May 19, 1998
    Assignee: Jeco Co., Ltd.
    Inventors: Hirokazu Komiya, Yoshifumi Imai, Hiroshi Iiyama
  • Patent number: 5747897
    Abstract: In a stepping motor, each of four integrally molded annular stators constituting two pairs has an annular plate having a central hole in which a magnet rotor is to be inserted, and pole teeth that form magnetic pole portions separated from the magnet rotor at a predetermined gap. The pole teeth of one annular stator of a given pair extend from the annular plate to be perpendicular to the other of the given pair, and are equidistantly arranged around the central hole to be shifted from the pole teeth of the other annular stator by a half pitch. Mounting holes are formed in each annular plate at predetermined spaces in the circumferential direction, and the mounting holes formed in the annular plates of given annular stators of different pairs that are arranged back to back are located at the same positions. Molded insulating films are formed on surfaces, which do not oppose the magnet rotor, of all the annular stators.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: May 5, 1998
    Assignee: Jeco Co., Ltd.
    Inventors: Toru Iwasa, Akio Ito, Yoshiyuki Ariki
  • Patent number: 5495762
    Abstract: A pendulum acceleration sensor includes a plate-like pendulum, at least a pair of detection sensors, and a holder unit. The pendulum swings about a shaft in a direction parallel to the side surfaces of the pendulum in accordance with an acceleration. The pair of detection sensors are arranged to oppose each other with the pendulum interposed therebetween to detect the displacement amount of the pendulum upon swing. The holder unit is constituted by sensor storing members for storing the detection sensors and positioning the detection sensors with respect to the pendulum, and shaft support members integrally formed with the sensor storing members to pivotally support two ends of the shaft of the pendulum and define a swing space for the pendulum.
    Type: Grant
    Filed: April 1, 1994
    Date of Patent: March 5, 1996
    Assignee: Jeco Co., Ltd.
    Inventors: Kazuyuki Tamura, Hiroshi Iiyama
  • Patent number: 5055759
    Abstract: A servo accelerometer includes a pendulum, a coil, a detection unit, and a servo unit. The detection unit has a photopotentiometer for receiving light passing through a slit of the pendulum and outputting a detection output on the basis of a change in resistance corresponding to a change in irradiation point. The servo unit has a displacement detection circuit for outputting a difference between a detection output from the photopotentiometer and a set value as a detection displacement amount.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: October 8, 1991
    Assignee: Jeco Co., Ltd.
    Inventor: Norio Miyahara
  • Patent number: 4879510
    Abstract: An indicator includes an indicating member driving unit, an encoder plate, a rotational position detecting unit, and an indication position control unit. The indicating member driving unit rotates an indicating member mounted on a rotor shaft in accordance with an electrical signal input to cause the indicating member to indicate. The encoder plate rotates in association with the indicating member. The rotational position detecting unit detects an actual indication position of the indicating member on the basis of a rotational amount of the encoder plate. The indication position control unit controls the indication position of the indicating member so that the actual indication position of the indicating member detected by the rotational position detecting unit coincides with an indication position of the indicating member determined in correspondence to the electrical signal input.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: November 7, 1989
    Assignee: Jeco Co., Ltd.
    Inventor: Akio Itoh