Patents by Inventor HIROHIDE ICHIHASHI
HIROHIDE ICHIHASHI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11761989Abstract: A current sensor is configured to detect a current flowing through an electrical conductor. The current sensor includes a core and a coil wound around the core. The core has a hollow therein configured to allow the electrical conductor to pass through the hollow. The core substantially has a C-shape having a gap connected to the hollow. The core has a pair of end surfaces facing each other in a facing direction across the gap. The core includes plural split cores joined to one another. Each pair of split cores of the plural split cores adjacent to each other have respective joining surfaces joined to each other. The respective joining surfaces of the each pair of split cores being parallel to the facing direction. This current sensor has a desired sensitivity characteristic.Type: GrantFiled: March 26, 2020Date of Patent: September 19, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yuta Sato, Hirohide Ichihashi, Mitsuru Tomita, Masakazu Kobayashi
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Patent number: 11726113Abstract: A current sensor is configured to detect a current flowing through an electrical conductor. The current sensor includes a core and a coil wound around the core. The core has a hollow configure to allow the electrical conductor to pass through the hollow. The core substantially has a C-shape haying a gap connected to the hollow. At least a part of the gap of the core is located inside the coil. This current sensor suppresses the influence of external noise.Type: GrantFiled: March 26, 2020Date of Patent: August 15, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yuta Sato, Hirohide Ichihashi, Mitsuru Tomita, Masakazu Kobayashi, Manabu Hashimoto
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Publication number: 20220308093Abstract: A current measurement system is configured to measure an alternating-current (AC) current flowing through a conductor. The AC current has a frequency within a measurement range. The system includes a current sensor and a shunt resistor. The current sensor includes a measurement coil configured to be magnetically coupled to the conductor. The shunt resistor has both ends electrically connected to both ends of the measurement coil, respectively. An output voltage across the both ends of the shunt resistor is saturated at a saturation point in a saturation frequency of the frequency of the AC current. An upper limit value of the measurement range including the frequency is higher than a fundamental frequency of the AC current. The saturation frequency is higher than or equal to the upper limit value. The current measurement system improves sensitivity to frequency components higher than the fundamental frequency of the AC current.Type: ApplicationFiled: February 25, 2020Publication date: September 29, 2022Inventors: YUTA SATO, HIROHIDE ICHIHASHI, KAZUTAKA IKEDA
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Publication number: 20220155351Abstract: A current sensor is configured to detect a current flowing through an electrical conductor. The current sensor includes a core and a coil wound around the core. The core has a hollow configure to allow the electrical conductor to pass through the hollow. The core substantially has a C-shape haying a gap connected to the hollow. At least a part of the gap of the core is located inside the coil. This current sensor suppresses the influence of external noise.Type: ApplicationFiled: March 26, 2020Publication date: May 19, 2022Inventors: YUTA SATO, HIROHIDE ICHIHASHI, MITSURU TOMITA, MASAKAZU KOBAYASHI, MANABU HASHIMOTO
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Publication number: 20220034943Abstract: A current sensor is configured to detect a current flowing through an electrical conductor. The current sensor includes a core and a coil wound around the core. The core has a hollow therein configured to allow the electrical conductor to pass through the hollow. The core substantially has a C-shape having a gap connected to the hollow. The core has a pair of end surfaces facing each other in a facing direction across the gap. The core includes plural split cores joined to one another. Each pair of split cores of the plural split cores adjacent to each other have respective joining surfaces joined to each other. The respective joining surfaces of the each pair of split cores being parallel to the facing direction. This current sensor has a desired sensitivity characteristic.Type: ApplicationFiled: March 26, 2020Publication date: February 3, 2022Inventors: YUTA SATO, HIROHIDE ICHIHASHI, MITSURU TOMITA, MASAKAZU KOBAYASHI
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Patent number: 10574127Abstract: In an actuator (camera driver) according to the present invention, when a movable unit is in a neutral position in which the movable unit has rotated around neither an axis nor an axis, a first synthetic vector and a second synthetic vector are directed toward an object to be driven with respect to a plane including the both axes. The first synthetic vector is defined by synthesizing together two first vectors, pointing toward a pair of magnetic yokes, of magnetic attraction forces between a pair of first driving magnets and the pair of magnetic yokes. The second synthetic vector is defined by synthesizing together two second vectors, pointing toward a pair of magnetic yokes, of magnetic attraction forces between a pair of second driving magnets and the pair of magnetic yokes.Type: GrantFiled: March 21, 2017Date of Patent: February 25, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Teruyuki Takizawa, Hironori Tomita, Tsutomu Shimomura, Masakazu Kobayashi, Yasuaki Kameyama, Hirohide Ichihashi
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Publication number: 20190379266Abstract: In an actuator (camera driver) according to the present invention, when a movable unit is in a neutral position in which the movable unit has rotated around neither an axis nor an axis, a first synthetic vector and a second synthetic vector are directed toward an object to be driven with respect to a plane including the both axes. The first synthetic vector is defined by synthesizing together two first vectors, pointing toward a pair of magnetic yokes, of magnetic attraction forces between a pair of first driving magnets and the pair of magnetic yokes. The second synthetic vector is defined by synthesizing together two second vectors, pointing toward a pair of magnetic yokes, of magnetic attraction forces between a pair of second driving magnets and the pair of magnetic yokes.Type: ApplicationFiled: March 21, 2017Publication date: December 12, 2019Inventors: Teruyuki TAKIZAWA, Hironori TOMITA, Tsutomu SHIMOMURA, Masakazu KOBAYASHI, Yasuaki KAMEYAMA, Hirohide ICHIHASHI
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Publication number: 20190346748Abstract: An actuator includes: a movable unit to hold a camera device thereon; a fixed unit; and at least two bundles of cables. Each of the at least two bundles of cables has an anisotropic flexural property. Each bundle of cables has an extension point. The bundle of cables is extended from the movable unit at the extension point so as to distance itself from a center of rotation. When measured along an optical axis of the camera device, distance from the center of rotation of the movable unit to the extension point is shorter than distance from the center of rotation to a first connector.Type: ApplicationFiled: July 25, 2019Publication date: November 14, 2019Inventors: Yasuaki KAMEYAMA, Teruyuki TAKIZAWA, Hironori TOMITA, Masakazu KOBAYASHI, Hirohide ICHIHASHI, Tsubasa HOSHINO, Hisashi HIRAKI, Tomonari KURIAKI, Zennosuke YAMASHITA
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Publication number: 20190267880Abstract: An actuator includes drive magnets (first drive magnet and second drive magnet) and back yokes (first magnetic back yoke and second magnetic back yoke). The back yokes are each provided one to one for an associated one of the drive magnets. The associated one of the drive magnets is attached to each of the back yokes. The back yokes include at least one pair of back yokes facing each other with respect to an optical axis. Each of the at least one pair of back yokes includes a base and a yoke protrusion. An associated one of the drive magnets is attached to the base. The yoke protrusion is coupled to the base and arranged to face at least one out of two ends of the associated drive magnet in a rolling direction of a movable holder.Type: ApplicationFiled: May 15, 2019Publication date: August 29, 2019Inventors: Hirohide ICHIHASHI, Masakazu KOBAYASHI, Yasuaki KAMEYAMA, Tsutomu SHIMOMURA, Tsubasa HOSHINO
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Patent number: 9660546Abstract: A coil structure includes: a magnetic core that defines a closed loop magnetic path in which a magnetic flux flows, the magnetic core including a core leg; a coil that is wound around the core leg about a coil axis extending in a first direction, the coil generating the magnetic flux; a detour member that is separate from the magnetic core, the detour member defining a detour magnetic path that detours around the closed loop magnetic path between first and second points, the detour member including a first piece that defines the first point and a second piece that defines the second point; and a fixing portion that includes an adjoining member adjoining the core leg and a connecting portion connecting at least one of the first piece and the second piece to the adjoining member and fixes positional relations among the core leg and the first and second points.Type: GrantFiled: March 3, 2015Date of Patent: May 23, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Akira Kato, Kazuyuki Sakiyama, Hirohide Ichihashi
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Publication number: 20150270052Abstract: A coil structure includes: a magnetic core that defines a closed loop magnetic path in which a magnetic flux flows, the magnetic core including a core leg; a coil that is wound around the core leg about a coil axis extending in a first direction, the coil generating the magnetic flux; a detour member that is separate from the magnetic core, the detour member defining a detour magnetic path that detours around the closed loop magnetic path between first and second points, the detour member including a first piece that defines the first point and a second piece that defines the second point; and a fixing portion that includes an adjoining member adjoining the core leg and a connecting portion connecting at least one of the first piece and the second piece to the adjoining member and fixes positional relations among the core leg and the first and second points.Type: ApplicationFiled: March 3, 2015Publication date: September 24, 2015Inventors: AKIRA KATO, KAZUYUKI SAKIYAMA, HIROHIDE ICHIHASHI