Patents by Inventor Kazuhiro Mihara
Kazuhiro Mihara 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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Publication number: 20050047290Abstract: A disk apparatus includes a pick-up for reading/writing signals from/on a disk; a pick-up base provided with the pick-up; a traverse motor for moving the pick-up in a radial direction of said disk; a feed screw rotated by the traverse motor and provided with a thread groove on its periphery; a rack having a fixing portion fixed to the pick-up base and a nut portion engaged with the thread groove; a guiding mechanism for guiding the pick-up movably in a radial direction of the disk; and a cantilever parallel spring for connecting the fixing portion to the nut portion of the rack, displaceably in a radial direction of the feed screw.Type: ApplicationFiled: October 12, 2004Publication date: March 3, 2005Inventors: Takanori Okada, Shuichi Yoshida, Masaharu Imura, Kiyoshi Masaki, Kazuhiro Mihara, Tsutomu Kai, Noritaka Akagi
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Patent number: 6862401Abstract: A recording apparatus includes a recording device which records audio visual data (hereinafter referred to as “AV data”) on a recording medium. A file restoration device which, when file management information for managing a file recorded on the recording medium is destroyed or lost while the recording means records the AV data, restores or generates the file management information so as to make it possible to access a portion of the AV data already recorded on the recording medium.Type: GrantFiled: November 13, 2000Date of Patent: March 1, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takashi Higashida, Hideki Takahashi, Kazuhiro Mihara, Yuji Tanigawa
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Publication number: 20040111737Abstract: The present invention is intended to provide a disk drive apparatus capable of suppressing the occurrence of undesirable vibration due to the imbalance of a disk and capable of carrying out high-rate transfer, wherein a balancer is formed so as to accommodate a predetermined number of spherical bodies in a ring-shaped track portion having a predetermined shape, and this balancer is provided so as to be rotatable integrally and coaxially with the disk. In addition, in the disk drive apparatus of the present invention, the ring-shaped track of the balancer is divided into plural tracks by partition walls or the like, and a ball used as a balance member is disposed so as to be movable on each divided track. Furthermore, the disk drive apparatus of the present invention is configured so that the disk is held on both sides or one side thereof by using four or more projections or rubber sheets.Type: ApplicationFiled: November 19, 2003Publication date: June 10, 2004Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Kiyoshi Masaki, Kazuhiro Mihara, Shuichi Yoshida, Teruyuki Naka, Sachio Fukuyama, Noriaki Urayama, Masaaki Kikugawa, Makoto Maruoka, Shinichiro Obayashi
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Patent number: 6741544Abstract: The present invention is intended to provide a disk drive apparatus capable of suppressing the occurrence of undesirable vibration due to the imbalance of a disk and capable of carrying out high-rate transfer, wherein a balancer is formed so as to accommodate a predetermined number of spherical bodies in a ring-shaped track portion having a predetermined shape, and this balancer is provided so as to be rotatable integrally and coaxially with the disk. In addition, in the disk drive apparatus of the present invention, the ring-shaped track of the balancer is divided into plural tracks by partition walls or the like, and a ball used as a balance member is disposed so as to be movable on each divided track. Furthermore, the disk drive apparatus of the present invention is configured so that the disk is held on both sides or one side thereof by using four or more projections or rubber sheets.Type: GrantFiled: June 8, 2000Date of Patent: May 25, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kiyoshi Masaki, Kazuhiro Mihara, Shuichi Yoshida, Teruyuki Naka, Sachio Fukuyama, Noriaki Urayama, Masaaki Kikugawa, Makoto Maruoka, Shinichiro Obayashi
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Publication number: 20040093611Abstract: To provide a disk drive apparatus that suppresses undesirable vibrations due to the unbalance of a loaded disk and achieves high-speed data transfer, the disk drive apparatus of the present invention comprises a hollow ring member (23) that contains therein a plurality of spherical bodies (24) or a liquid (26) to form a balancer or a balancer, wherein the balancer is formed so as to be rotatable in integral fashion with a disk, thereby suppressing the vibrations generated when an unbalanced disk is rotated at high speed.Type: ApplicationFiled: October 28, 2003Publication date: May 13, 2004Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Kiyoshi Masaki, Kazuhiro Mihara, Shuichi Yoshida, Sachio Fukuyama, Noriaki Urayama, Masaaki Kikugawa
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Publication number: 20040067047Abstract: Continuous transfer of AV data without a break necessitates to perform replacement processing of a disk access unit and takes labor and time.Type: ApplicationFiled: November 4, 2003Publication date: April 8, 2004Inventors: Shinichirou Takigawa, Kazuhiro Mihara, Yoshiki Kuno, Junichi Komeno, Yoshitaka Yaguchi
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Patent number: 6711116Abstract: To provide a disk drive apparatus that suppresses undesirable vibrations due to the unbalance of a loaded disk and achieves high-speed data transfer, the disk drive apparatus of the present invention comprises a hollow ring member (23) that contains therein a plurality of spherical bodies (24) or a liquid (26) to form a balancer, wherein the balancer is formed so as to be rotatable in integral fashion with a disk, thereby suppressing the vibrations generated when an unbalanced disk is rotated at high speed.Type: GrantFiled: June 24, 2002Date of Patent: March 23, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kiyoshi Masaki, Kazuhiro Mihara, Shuichi Yoshida, Sachio Fukuyama, Noriaki Urayama, Masaaki Kikugawa
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Patent number: 6704271Abstract: To provide a disk drive apparatus that suppresses undesirable vibrations due to the unbalance of a loaded disk and achieves high-speed data transfer, the disk drive apparatus of the present invention comprises a hollow ring member (23) that contains therein a plurality of spherical bodies (24) or a liquid (26) to form a balancer or a balancer, wherein the balancer is formed so as to be rotatable in integral fashion with a disk, thereby suppressing the vibrations generated when an unbalanced disk is rotated at high speed.Type: GrantFiled: June 24, 2002Date of Patent: March 9, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kiyoshi Masaki, Kazuhiro Mihara, Shuichi Yoshida, Sachio Fukuyama, Noriaki Urayama, Masaaki Kikugawa
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Publication number: 20040008731Abstract: An AV data recording/reproducing device is connected to a digital broadcasting tuner and the like via an EEEE1394 bus, in order to realize high-speed transfer when duplicating or transporting AV data between devices such as audio-visual data recording/reproducing devices. A synchronous transfer input/output portion inputs and outputs stream data that are AV data by isochronous transfer with an MPEG-2 transport stream. A recording control portion and a reproduction control portion generate timestamped data and reproduce the stream data, and an HDD stores the timestamped data. An asynchronous transfer input/output portion asynchronously inputs and outputs the timestamped data by SBP-2 transfer. Consequently, the timestamped data that can reproduce the stream data are transferred at high speeds, regardless of an actual time required for performing the display or the like of the stream data.Type: ApplicationFiled: July 10, 2003Publication date: January 15, 2004Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Masahiro Okada, Yuji Tanikawa, Kazuhiro Mihara
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Patent number: 6654321Abstract: In a method of the present invention for controlling stepping motor, the stepping motor driving current is increased or reduced at a fixed inclination in proportion to the time to control the stepping motor effectively, and, a stepping motor driving current pattern is changed by ¼ cycle or more to synchronize the state of excitation between the stepping motor driving means and the stepping motor to control the pick-up very accurately. In addition, the disk apparatus of the present invention, which uses a stepping motor is provided with a pulse rate pattern variable means, a pulse rate change proportion measuring means, and a driving voltage variable means, and when the pulse rate and the pulse rate change proportion are low, the driving voltage amplitude is lowered to reduce surplus torque generation in the stepping motor.Type: GrantFiled: April 18, 2001Date of Patent: November 25, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takanori Okada, Shuichi Yoshida, Masaharu Imura, Kiyoshi Masaki, Kazuhiro Mihara, Tsutomu Kai, Noritaka Akagi, Masanori Harui, Kazuhiko Kouno
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Publication number: 20030198150Abstract: A disk apparatus includes a disk having helically-formed tracks and storing information on said tracks; a motor for rotating said disk; a pick-up means having a focus servo means and a tracking servo means for reading information recorded on said disk by following the information stored on said tracks; traverse means having a stepping motor for moving said pick-up means by a specified distance; pulse generating means for generating pulse signals for controlling said stepping motor; stepping motor driving means for driving said stepping motor according to said pulse signals received from said pulse generating means; a step-out detecting means for detecting a step-out of said stepping motor; and a driving voltage changing means for changing a driving voltage of said stepping motor when said step-out detecting means detects the step-out in said stepping motor driving means.Type: ApplicationFiled: June 11, 2003Publication date: October 23, 2003Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Takanori Okada, Shuichi Yoshida, Masaharu Imura, Kiyoshi Masaki, Kazuhiro Mihara, Tsutomu Kai, Noritaka Akagi
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Patent number: 6507555Abstract: A balanced disk drive apparatus for suppressing undesirable vibrations caused by the unbalance of a detachable disk during high speed data transfer comprises a balanced disk drive apparatus having a hollow ring member containing a balancing member therein to form a balancer wherein the balancer is rotatable with the detachable disk for suppressing vibrations created by the unbalanced detachable disk during high speed rotation.Type: GrantFiled: March 13, 1998Date of Patent: January 14, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kiyoshi Masaki, Kazuhiro Mihara, Shuichi Yoshida, Sachio Fukuyama, Noriaki Urayama, Masaaki Kikugawa
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Publication number: 20020191530Abstract: To provide a disk drive apparatus that suppresses undesirable vibrations due to the unbalance of a loaded disk and achieves high-speed data transfer, the disk drive apparatus of the present invention comprises a hollow ring member (23) that contains therein a plurality of spherical bodies (24) or a liquid (26) to form a balancer or a balancer, wherein the balancer is formed so as to be rotatable in integral fashion with a disk, thereby suppressing the vibrations generated when an unbalanced disk is rotated at high speed.Type: ApplicationFiled: June 24, 2002Publication date: December 19, 2002Applicant: Matsushita Electric Industrial Co., LTD.Inventors: Kiyoshi Masaki, Kazuhiro Mihara, Shuichi Yoshida, Sachio Fukuyama, Noriaki Urayama, Masaaki Kikugawa
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Publication number: 20020176351Abstract: To provide a disk drive apparatus that suppresses undesirable vibrations due to the unbalance of a loaded disk and achieves high-speed data transfer, the disk drive apparatus of the present invention comprises a hollow ring member (23) that contains therein a plurality of spherical bodies (24) or a liquid (26) to form a balancer or a balancer, wherein the balancer is formed so as to be rotatable in integral fashion with a disk, thereby suppressing the vibrations generated when an unbalanced disk is rotated at high speed.Type: ApplicationFiled: June 24, 2002Publication date: November 28, 2002Applicant: Matsushita Electric Industrial Co., LTD.Inventors: Kiyoshi Masaki, Kazuhiro Mihara
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Publication number: 20010017824Abstract: In a method of the present invention for controlling stepping motor, the stepping motor driving current is increased or reduced at a fixed inclination in proportion to the time to control the stepping motor effectively, and, a stepping motor driving current pattern is changed by ¼ cycle or more to synchronize the state of excitation between the stepping motor driving means and the stepping motor to control the pick-up very accurately.Type: ApplicationFiled: April 18, 2001Publication date: August 30, 2001Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Takanori Okada, Shuichi Yoshida, Masaharu Imura, Kiyoshi Masaki, Kazuhiro Mihara, Tsutomu Kai, Noritaka Akagi, Masanori Harui, Kazuhiko Kouno
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Patent number: 6249495Abstract: In a method of the present invention for controlling stepping motor, the stepping motor driving current is increased or reduced at a fixed inclination in proportion to the time to control the stepping motor effectively, and, a stepping motor driving current pattern is changed by 1/4 cycle or over to synchronize the state of excitation between the stepping motor driving means and the stepping motor to control the pick-up very accurately. In addition, the disk apparatus of the present invention, which uses a stepping motor is provided with a pulse rate pattern variable means, a pulse rate change proportion measuring means, and a driving voltage variable means, and when the pulse rate and the pulse rate change proportion are low, the driving voltage amplitude is lowered to reduce surplus torque generation in the stepping motor.Type: GrantFiled: February 26, 1998Date of Patent: June 19, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takanori Okada, Shuichi Yoshida, Masaharu Imura, Kiyoshi Masaki, Kazuhiro Mihara, Tsutomu Kai, Noritaka Akagi, Masanori Harui, Kazuhiko Kouno