Patents by Inventor Takashi Ishizawa

Takashi Ishizawa 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).

  • Patent number: 7852579
    Abstract: A camera module includes a lens unit which constitutes an optical system of the camera module; a holder which houses the lens unit and is displaceable along an optical axis direction of the lens unit, and the coil having a hollow cylindrical portion; a coil having a cylindrical form and provided around the cylindrical portion of the holder; a yoke and magnets provided on the yoke for providing a magnetic field to the coil; upper and lower leaf springs for supporting the holder so that the holder is displaceable along an optical axis direction of the lens unit; and an imaging element provided below the lens unit. The holder has coil holding portions to which the coil is fitted for fixedly providing the coil around the cylindrical portion of the holder without using an adhesive.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: December 14, 2010
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Tomohiko Osaka, Takashi Ishizawa
  • Patent number: 7705909
    Abstract: A camera module for small digital cameras and camera-equipped cellular phones includes a lens unit; a holder housing the lens unit and displaceable along an optical axis; a coil on the holder; a yoke and magnets in the yoke providing a magnetic field to the coil; a leaf spring for supporting the holder; and an imaging element below the lens unit. The leaf spring includes an outer annular portion attached to the yoke, an inner annular portion attached to the holder, and bridge portions coupled between the outer and inner annular portion to resiliently support the inner annular portion. Each bridge portion has an outer and an inner annular portion side base part, and extends between an inner peripheral edge of the outer annular portion and an outer peripheral edge of the inner annular portion, the outer annular portion welded to the top surface of the yoke.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: April 27, 2010
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Takashi Ishizawa, Tomohiko Osaka
  • Patent number: 7641403
    Abstract: A camera module includes a holder provided with a lens unit and displaceable along an optical axis; a coil formed from a wound wire having lead wires; a yoke and magnets for providing a magnetic field to the coil; a flexible printed circuit board for supplying an electrical current to the lead wires; and upper and lower leaf springs for supporting the holder displaceably along the optical axis. Each of the upper and lower springs includes an outer annular portion and an inner annular portion, and coupled by bridge portions. Part of the flexible printed circuit board is formed into a tongue part arranged in a space between a bridge portion of the lower leaf spring and the lead wires to prevent contact with the lead wires.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: January 5, 2010
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Takashi Ishizawa, Tomohiko Osaka
  • Patent number: 7639440
    Abstract: A camera module includes upper and lower leaf springs having a stable load characteristic and a holder displaceably held by the leaf springs so that the holder can be stably displaced within a magnetic circuit. The upper spring has an outer annular portion, an inner annular portion provided inside the outer annular portion so as to be displaceable with respect to the outer annular portion and attached to the holder, and a plurality of bridge portions coupled between the outer annular portion and the inner annular portion. The camera module further includes a bridge portion supporting member for supporting a part of at least one of the plurality of bridge portions so that a load characteristic of the leaf spring can be changed.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: December 29, 2009
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Takashi Ishizawa, Tomohiko Osaka
  • Patent number: 7627238
    Abstract: A camera module that can obtain a clear image even in the case where dust is generated inside the camera module due to a shock applied thereto is provided. The camera module includes a base and a cover attached to the base so as to define a space therebetween in which the holder can be displaced.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: December 1, 2009
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Tomohiko Osaka, Takashi Ishizawa
  • Patent number: 7492538
    Abstract: A camera module having a holder including a leans unit and upper and lower leaf springs for displaceably supporting is provided. Each of the leaf springs has an outer annular portion, an inner annular portion, and bridge portions couple between the outer annular portion and the inner annular portion for resiliently support the inner annular portion with respect to the outer annular portion. The inner annular portion of the lower leaf spring is attached to an lower cylindrical end portion of the holder mechanically and reliably, and the inner annular portion of the upper leaf spring is attached to the upper cylindrical end portion of the holder in a state that the inner annular portion is fixedly held between an upper cylindrical end portion of the holder and a stopper.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: February 17, 2009
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Takashi Ishizawa, Tomohiko Osaka
  • Publication number: 20090031321
    Abstract: A business process management computer, when the load of a service execution computer etc. is increased, determines the condition of a service call step which is calling a service execution unit, etc. of said service execution computer, etc. If said condition is the bottleneck condition, it determines the condition of the service call step in other process which is calling said service execution unit, etc. If there is no condition other than the bottleneck in that condition, the addition of the resource for said service execution computer, etc. is determined and if there is a condition in which the throughput can be limited, it is determined that the throughput should be limited. In a process which is configured with a plurality of service call steps, when the resource insufficiency has occurred, a means to make the adequate addition of the resource possible can be provided.
    Type: Application
    Filed: February 7, 2008
    Publication date: January 29, 2009
    Inventors: Takashi ISHIZAWA, Atsushi Hatakeyama, Naotsugu Toume, Ryo Kawai
  • Publication number: 20080297899
    Abstract: A camera module that can obtain a clear image even in the case where dust is generated inside the camera module due to a shock applied thereto is provided. The camera module includes a base and a cover attached to the base so as to define a space therebetween in which the holder can be displaced.
    Type: Application
    Filed: October 30, 2007
    Publication date: December 4, 2008
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Tomohiko Osaka, Takashi Ishizawa
  • Publication number: 20080266682
    Abstract: A camera module includes upper and lower leaf springs having a stable load characteristic and a holder displaceably held by the leaf springs so that the holder can be stably displaced within a magnetic circuit. The upper spring 5 has an outer annular portion 5a, an inner annular portion 5b provided inside the outer annular portion 5a so as to be displaceable with respect to the outer annular portion 5a and attached to the holder 9, and a plurality of bridge portions 5c coupled between the outer annular portion 5a and the inner annular portion 5b. The camera module further includes a bridge portion supporting member 4 for supporting a part of at least one of the plurality of bridge portions so that a load characteristic of the leaf spring can be changed.
    Type: Application
    Filed: August 28, 2007
    Publication date: October 30, 2008
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Takashi Ishizawa, Tomohiko Osaka
  • Publication number: 20080117535
    Abstract: A camera module includes a lens unit which constitutes an optical system of the camera module; a holder which houses the lens unit and is displaceable along an optical axis direction of the lens unit, and the coil having a hollow cylindrical portion; a coil having a cylindrical form and provided around the cylindrical portion of the holder; a yoke and magnets provided on the yoke for providing a magnetic field to the coil; upper and lower leaf springs for supporting the holder so that the holder is displaceable along an optical axis direction of the lens unit; and an imaging element provided below the lens unit. The holder has coil holding portions to which the coil is fitted for fixedly providing the coil around the cylindrical portion of the holder without using an adhesive.
    Type: Application
    Filed: October 30, 2007
    Publication date: May 22, 2008
    Applicant: Mitsumi Electric Co., Ltd.
    Inventors: Tomohiko Osaka, Takashi Ishizawa
  • Publication number: 20080079845
    Abstract: A camera module includes a lens unit which constitutes an optical system of the camera module; a holder which houses the lens unit and is displaceable along an optical axis direction of the lens unit; a coil provided on the holder; a yoke and magnets provided on the yoke for providing a magnetic field to the coil; a flexible printed circuit board to which the lead wires are connected for supplying an electrical current to the lead wires, the flexible printed circuit board having an insulating sheet portion and a pattern portion; a leaf spring for supporting the holder so that the holder is displaceable along an optical axis direction of the lens unit; a base for supporting the holder when no electrical current is supplied to the coil; and an imaging element provided below the lens unit.
    Type: Application
    Filed: September 25, 2007
    Publication date: April 3, 2008
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Tomohiko Osaka, Takashi Ishizawa
  • Publication number: 20080069557
    Abstract: A camera module includes a holder provided with a lens unit and displaceable along an optical axis direction of the lens unit; a coil formed from a wound wire having both end portions serving as lead wires, and provided on the holder; a yoke and magnets for providing a magnetic field to the coil; a flexible printed circuit board for supplying an electrical current to the lead wires; and upper and lower leaf springs for supporting the holder so that the holder is displaceable along the optical axis direction. Each of the upper and lower springs includes an outer annular portion, an inner annular portion provided inside the outer annular portion and attached to one of the cylindrical end portions of the holder, and a plurality of bridge portions coupled between the outer annular portion and the inner annular portion.
    Type: Application
    Filed: September 11, 2007
    Publication date: March 20, 2008
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Takashi Ishizawa, Tomohiko Osaka
  • Publication number: 20080055456
    Abstract: A camera module that can be used in small-sized electronic apparatuses such as digital cameras, camera-equipped cellular phones is provided. The camera module includes a lens unit which constitutes an optical system of the camera module; a holder which houses the lens nit and is displaceable along an optical axis direction of the lens unit; a coil provided on the holder; a yoke and magnets provided in the yoke for providing a magnetic field to the coil; at least one leaf spring for supporting the holder; and an imaging element provided below the lens unit. The at least one leaf spring includes an outer annular portion which is attached to the yoke, an inner annular portion which is provided inside the outer annular portion though a predetermined spacing and is attached to the holder, and a plurality of bridge portions which are coupled between the outer annular portion and the inner annular portion so as to resiliently support the inner annular portion with respect to the outer annular portion.
    Type: Application
    Filed: August 28, 2007
    Publication date: March 6, 2008
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Takashi Ishizawa, Tomohiko Osaka
  • Publication number: 20080055752
    Abstract: A camera module having a holder including a leans unit and upper and lower leaf springs for displaceably supporting is provided. Each of the leaf springs has an outer annular portion, an inner annular portion, and bridge portions couple between the outer annular portion and the inner annular portion for resiliently support the inner annular portion with respect to the outer annular portion. The inner annular portion of the lower leaf spring is attached to an lower cylindrical end portion of the holder mechanically and reliably, and the inner annular portion of the upper leaf spring is attached to the upper cylindrical end portion of the holder in a state that the inner annular portion is fixedly held between an upper cylindrical end portion of the holder and a stopper.
    Type: Application
    Filed: August 28, 2007
    Publication date: March 6, 2008
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Takashi Ishizawa, Tomohiko Osaka
  • Patent number: 5930081
    Abstract: A magnetic head in which a holder (25) of a nonmagnetic material is connected to a magnetic head core (20) by bonding, wherein protrusion portions (26 and 27) are integrally formed on the holder (25) so that the protrusion portions (26 and 27) are made to pass through the magnetic head core (20) and top end portions (26a and 27a) of the protrusion portions (26 and 27) are thermally fusion-bonded to the magnetic head core (20) to thereby connect the holder (25) to the magnetic head core (20).
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: July 27, 1999
    Assignee: Mitsumi Electric, Co., Ltd.
    Inventors: Takashi Ishizawa, Toru Nakajima
  • Patent number: 5901015
    Abstract: A magnetic head apparatus has a reduced thickness by preventing a jumping action of a magnetic head that can occur in a head-up state. A leaf spring has a first end and a second end opposite to the first end, and the leaf spring supporting the magnetic head at the first end, the leaf spring having a surface facing the magnetic medium. A mount member holds the leaf spring, the leaf spring being mounted to the mount member at the second end. A supporting portion extends from the mount member, and engages the surface of the leaf spring at a position between the magnetic head and the mount member.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: May 4, 1999
    Assignees: Sony Corporation, Mitsumi Electric Co., Ltd.
    Inventors: Kazuhito Kurita, Toshihiro Kusunoki, Yasuhiro Habara, Takashi Ishizawa, Hideyuki Ikeda, Naoto Inoue
  • Patent number: 5238051
    Abstract: An electromagnetic brake device for a continuous casting mold. The mold has a rectangular cross section having long sides and short sides. The mold also includes water boxes adjacent at least the long sides. The electromagnetic brake device includes an electromagnet including magnetic poles which are provided respectively at the long sides of the casting mold and are disposed in opposed relation to each other. The magnetic poles have a width generally equal to a width of the long sides of the casting mold. Coils are wound on outer peripheries of the magnetic poles. An iron core is provided in surrounding relation to the casting mold, a portion of the iron core opposite each of the short sides of the casting mold extends through the water boxes located adjacent the long sides of the casting mold. The water boxes include openings through a surface into which the magnetic poles are adapted to be inserted. A backup plate is provided at a side of the water boxes located adjacent the mold.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: August 24, 1993
    Assignees: Nippon Steel Corp., Nittetsu Plant Designing Corp.
    Inventors: Toshio Kikuchi, Takashi Ishizawa, Takashi Tochihara, Katsumi Funatsu, Kazuo Nagahama, Kenzo Sawada, Yoshiyasu Ishikawa, Ryuichi Kageyama, Toyohiko Kanki
  • Patent number: 4867226
    Abstract: A method of oscillating a continuous caster mold at high frequencies comprises disposing a plurality of oscillators having substantially the same oscillating characteristic at appropriate intervals along or in the vicinity of a line where liquid metal contacts an inner lining of a mold, connecting the tip of each oscillator to the inner lining so that the axis of the oscillator extends at right angles to the surface of the inner lining, and supplying power from an oscillation generator to each oscillator so that the oscillation frequencies of any two adjoining oscillators are differentiated within the limit of 2 KHz. Thus, any two adjoining oscillators oscillate the inner lining at right angles to the surface thereof at mutually differentiated frequencies.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: September 19, 1989
    Assignee: Nippon Steel Corporation
    Inventors: Masatsugu Uehara, Haruo Kitamura, Kenzo Sawada, Tetsuo Nakamura, Takashi Ishizawa, Katsuhiko Yui, Yuichi Kato, Ryuichi Hiratsuka, Daijiro Mizukoshi, Masamitsu Wakoh, Junichi Kinoshita
  • Patent number: D398613
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: September 22, 1998
    Assignees: Sony Kabushiki Kaisha, Mitsumi Electric Co., Ltd.
    Inventors: Kazuhito Kurita, Toshihiro Kusunoki, Yasuhiro Habara, Takashi Ishizawa, Hideyuki Ikeda, Naoto Inoue