Patents by Inventor Mikio Umehara
Mikio Umehara 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: 8013486Abstract: There is provided a holding structure to hold a vibration motor on a circuit board with a sufficient holding strength using an inexpensive and simple means such as caulking and bonding and a vibration motor held on a circuit board using the holding structure. The holding structure having a holder clamps a vibration motor body having an eccentric weight at an end of the rotation shaft around the outer periphery from the outside and supports the vibration motor at the lower part.Type: GrantFiled: May 6, 2008Date of Patent: September 6, 2011Assignee: Minebea Motor Manufacturing CorporationInventors: Mikio Umehara, Kazuaki Sato, Daichi Kadowaki
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Patent number: 7825619Abstract: A method for controlling stopping of a vibration generating stepping motor is a method for controlling the stopping of an vibration generating stepping motor by a control unit, characterized in that the method includes: stopping a supply of a driving pulse to the vibration generating stepping motor while applying a driving voltage to the vibration generating stepping motor; applying the driving voltage to the stepping motor, which does not completely stop, for an optimum braking time according to a motor configuration of the stepping motor, so as to brake the stepping motor; and stopping the applying of the driving voltage to the stepping motor which is rotating under inertia after the elapse of the optimum braking time.Type: GrantFiled: December 28, 2006Date of Patent: November 2, 2010Assignee: Minebea Motor Manufacturing CorporationInventors: Masaki Matsubara, Kazuaki Sato, Mikio Umehara, Toshiaki Tsuzaki
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Patent number: 7709983Abstract: In a vibration motor holding structure for retaining a vibration motor having eccentric weights at rotation shaft ends and holding the vibration motor on a circuit board, there is provided a metal holder having support legs provided along a part of the length of the vibration motor and protruding horizontally in the direction orthogonal to the longitudinal direction of the vibration motor on both sides thereof. Thus, the vibration motor can be prevented from falling over during the mounting process and be held on the circuit board at solder-applied positions.Type: GrantFiled: May 2, 2008Date of Patent: May 4, 2010Assignee: Minebea Motor Manufacturing CorporationInventors: Mikio Umehara, Kazuaki Sato, Daichi Kadowaki
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Publication number: 20090269525Abstract: A weight for a vibration motor, the weight including: a resin part including: a semi-cylindrical portion having a shaft hole in which a rotary shaft is fitted and expanding radially from the shaft hole at a given center angle so as to be eccentrically weighted with respect to the shaft hole; and a pair of locking projections respectively disposed at both axial end areas of an outer circumferential surface of the semi-cylindrical portion so as to extend radially outwardly threfrom; and a metal part attached to the resin part so as to sit on the outer circumferential surface of the semi-cylindrical portion, the metal part including: a pair of locking recesses positioned and configured to correspond respectively to the locking projections of the resin portion, wherein an elevated portion formed between the pair of locking recesses makes contact with the pair of locking projections of the resin portion.Type: ApplicationFiled: April 22, 2009Publication date: October 29, 2009Applicant: Minebea Motor Manufacturing CorporationInventors: Masatoshi Kawano, Mikio Umehara, Daichi Kadowaki
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Publication number: 20090134733Abstract: Provided is a vibration generating stepping motor, which is ensured for holding a stop position by increasing a detent torque. The pole teeth of one stator yoke of a single-phase stator yoke assembly includes two kinds of pole teeth made different in the outermost side faces in the radial direction, and the pole teeth of the other stator yoke are comprised of two kinds of pole teeth made different in the outermost side faces in the radial direction. The pole teeth of one kind of the aforementioned individual stator yokes are made to have the same shape. The pole teeth of the remaining two kinds not given the same shape are combined and arranged to increase the detent torque.Type: ApplicationFiled: October 31, 2006Publication date: May 28, 2009Inventors: Masaaki Matsubara, Kazuaki Sato, Mikio Umehara, Toshiaki Tsuzaki
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Publication number: 20090051238Abstract: In a vibration motor holding structure for retaining a vibration motor having eccentric weights at rotation shaft ends and holding the vibration motor on a circuit board, there is provided a metal holder having support legs provided along a part of the length of the vibration motor and protruding horizontally in the direction orthogonal to the longitudinal direction of the vibration motor on both sides thereof. Thus, the vibration motor can be prevented from falling over during the mounting process and be held on the circuit board at solder-applied positions.Type: ApplicationFiled: May 2, 2008Publication date: February 26, 2009Inventors: Mikio Umehara, Kazuaki Sato, Daichi Kadowaki
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Publication number: 20080278013Abstract: There is provided a holding structure to hold a vibration motor on a circuit board with a sufficient holding strength using an inexpensive and simple means such as caulking and bonding and a vibration motor held on a circuit board using the holding structure. The holding structure having a holder clamps a vibration motor body having an eccentric weight at an end of the rotation shaft around the outer periphery from the outside and supports the vibration motor at the lower part.Type: ApplicationFiled: May 6, 2008Publication date: November 13, 2008Inventors: Mikio Umehara, Kazuaki Sato, Daichi Kadowaki
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Publication number: 20080129232Abstract: A method for controlling stopping of a vibration generating stepping motor is a method for controlling the stopping of an vibration generating stepping motor by a control unit, characterized in that the method includes: stopping a supply of a driving pulse to the vibration generating stepping motor while applying a driving voltage to the vibration generating stepping motor; applying the driving voltage to the stepping motor, which does not completely stop, for an optimum braking time according to a motor configuration of the stepping motor, so as to brake the stepping motor; and stopping the applying of the driving voltage to the stepping motor which is rotating under inertia after the elapse of the optimum braking time.Type: ApplicationFiled: December 28, 2006Publication date: June 5, 2008Inventors: Masaaki Matsubara, Kazuaki Sato, Mikio Umehara, Yoshiaki Tsuzaki
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Patent number: 7271516Abstract: A stepping motor for generating vibration is provided and includes a stator and a rotor. The rotor includes a shaft, a ring magnet and a rotor frame, and the rotor frame is formed into a substantial cup-shape including a disk portion having an opening at the center and also including a cylindrical portion continuously arranged at the periphery of the disk portion, and a weight portion is arranged in a portion of the rotor frame so that the gravity center of the rotor frame an be located at a position eccentric with respect to the center of the rotor frame.Type: GrantFiled: April 28, 2006Date of Patent: September 18, 2007Assignee: Minebea-Matsushita MotorInventors: Masaaki Matsubara, Kazuaki Sato, Osamu Furuta, Mikio Umehara, Toshiaki Tsuzaki, Chee Poh Chua
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Publication number: 20060267427Abstract: A stepping motor for generating vibration is provided and includes a stator and a rotor. The rotor includes a shaft, a ring magnet and a rotor frame, and the rotor frame is formed into a substantial cup-shape including a disk portion having an opening at the center and also including a cylindrical portion continuously arranged at the periphery of the disk portion, and a weight portion is arranged in a portion of the rotor frame so that the gravity center of the rotor frame an be located at a position eccentric with respect to the center of the rotor frame.Type: ApplicationFiled: April 28, 2006Publication date: November 30, 2006Inventors: Masaaki Matsubara, Kazuaki Sato, Osamu Furuta, Mikio Umehara, Toshiaki Tsuzaki, Chee Chua
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Publication number: 20060049705Abstract: A vibrating motor including a stepping motor in which control is simple, large vibration is generated, and drive torque can be efficiently generated, and a portable terminal apparatus using the same are provided. The vibrating motor includes a single-phase annular stator coil, a stator yoke disposed to surround the periphery of the single-phase annular stator coil and having pole teeth, an interface board fixing the stator yoke and having a wiring connected to the annular stator coil, plural arc-shaped magnets disposed to be opposite to the pole teeth and to be capable of rotating around a rotating shaft, and an eccentric weight capable of rotating around the rotating shaft.Type: ApplicationFiled: September 1, 2005Publication date: March 9, 2006Inventors: Masaaki Matsubara, Kazuaki Sato, Osamu Furuta, Mikio Umehara
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Patent number: 6624540Abstract: Brushless motors for portable information equipment that can be simultaneously reflow-soldered to a substrate and efficiently and densely mounted thereon in such a way that the coupled portion between the motor and the substrate has a high impact resistance, thereby providing small and reliable portable information equipment having a high productivity.Type: GrantFiled: August 28, 2001Date of Patent: September 23, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshiaki Fukuda, Koji Kuyama, Toshio Uehara, Kazuhito Itakura, Chiaki Yamamoto, Shigeru Yoshida, Hiroyasu Fujinaka, Mikio Umehara, Noriyoshi Sato
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Patent number: 6452298Abstract: Brushless motors for portable information equipment that can be simultaneously reflow-soldered to a substrate and efficiently and densely mounted thereon in such a way that the coupled portion between the motor and the substrate has a high impact resistance, thereby providing small and reliable portable information equipment having a high productivity.Type: GrantFiled: February 1, 2002Date of Patent: September 17, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshiaki Fukuda, Koji Kuyama, Toshio Uehara, Kazuhito Itakura, Chiaki Yamamoto, Shigeru Yoshida, Hiroyasu Fujinaka, Mikio Umehara, Noriyoshi Sato
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Patent number: 6417589Abstract: A motor includes (a) a stator having a stator core wound with a coil, (b) a rotor having a magnet facing the stator core via an annular space and a yoke disposed on an outer wall of the magnet, and (c) an unbalancing weight disposed on an outer wall of the yoke. This structure allows the motor to be small in size, light in weight, thin, flat and to function as a vibrating motor producing maximum vibration at low power consumption. The motor thus contributes to realizing a portable device with a small size, a low weight, and which is operable for many hours.Type: GrantFiled: March 10, 2000Date of Patent: July 9, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koji Kuyama, Shigeru Yoshida, Kodo Fukuoka, Mikio Umehara
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Publication number: 20020079762Abstract: Brushless motors for portable information equipment that can be simultaneously reflow-soldered to a substrate and efficiently and densely mounted thereon in such a way that the coupled portion between the motor and the substrate has a high impact resistance, thereby providing small and reliable portable information equipment having a high productivity.Type: ApplicationFiled: February 1, 2002Publication date: June 27, 2002Applicant: Matsushita Elec. Ind. Co., Ltd.Inventors: Yoshiaki Fukuda, Koji Kuyama, Toshio Uehara, Kazuhito Itakura, Chiaki Yamamoto, Shigeru Yoshida, Hiroyasu Fujinaka, Mikio Umehara, Noriyoshi Sato
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Publication number: 20020047385Abstract: Brushless motors for portable information equipment that can be simultaneously reflow-soldered to a substrate and efficiently and densely mounted thereon in such a way that the coupled portion between the motor and the substrate has a high impact resistance, thereby providing small and reliable portable information equipment having a high productivity.Type: ApplicationFiled: August 28, 2001Publication date: April 25, 2002Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yoshiaki Fukuda, Koji Kuyama, Toshio Uehara, Kazuhito Itakura, Chiaki Yamamoto, Shigeru Yoshida, Hiroyasu Fujinaka, Mikio Umehara, Noriyoshi Sato
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Patent number: 6365995Abstract: Brushless motors for portable information equipment that can be simultaneously reflow-soldered to a substrate and efficiently and densely mounted thereon in such a way that the coupled portion between the motor and the substrate has a high impact resistance, thereby providing small and reliable portable information equipment having a high productivity.Type: GrantFiled: February 7, 2000Date of Patent: April 2, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshiaki Fukuda, Koji Kuyama, Toshio Uehara, Kazuhito Itakura, Chiaki Yamamoto, Shigeru Yoshida, Hiroyasu Fujinaka, Mikio Umehara, Noriyoshi Sato
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Patent number: D619534Type: GrantFiled: December 22, 2009Date of Patent: July 13, 2010Assignee: Minebea Motor Manufacturing CorporationInventor: Mikio Umehara