Reducing Eccentricity Patents (Class 720/717)
  • Patent number: 8495669
    Abstract: A disk rotating device includes a flexible disk in which information is recordable, a turntable on which the disk is held, a spindle that rotates the disk held on the turntable, and a stabilizer that stabilizes the rotating disk. In the disk rotating device, a rotation transmitting device transmits the rotation of the spindle to the disk via the turntable, and a disk holding device holds the disk so that the disk is elastically deformable from a center of the rotation of the disk in a radial direction of the disk.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: July 23, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasutomo Aman, Nobuaki Onagi, Shozo Murata, Yasunori Sugimoto, Haruki Tokumaru, Daiichi Koide, Yoshimichi Takano
  • Patent number: 8486320
    Abstract: A spindle motor tray adhesive dispensing method and supplementary apparatus is disclosed. The apparatus includes a base block and a pressure block. The base block supports the tray to be processed, having a blind hole for receiving one end of the center axle of the tray and three adhesive troughs around the blind hole. The pressure block pressed on the tray above the base block and axially movable relative to the base block, having a guide hole for receiving the other end of the center axle of the tray. An open space is defined above the base block around the pressure block within which an adhesive dispenser is movable to dispense a polymer adhesive to the through holes on the tray and the adhesive troughs of the base block to form rubber pads at the tray when cured.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: July 16, 2013
    Assignee: Tricore Corporation
    Inventor: David Huang
  • Patent number: 8281331
    Abstract: A data storage medium support member is produced by resin molding. The data storage medium support member includes an accommodating portion, a guide portion, and a gate cut portion. The accommodating portion accommodates a magnetic member around a central axis. The guide portion has a guide surface for guiding an inner edge of a disc, and is arranged radially outward of the accommodating portion. The gate cut portion is formed on a rear surface of the guide portion. The data storage medium support member can be produced by the resin molding while securing space for accommodating the magnetic member and preventing an increase in the axial dimension of the data storage medium support member.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: October 2, 2012
    Assignee: Nidec Corporation
    Inventors: Hitoshi Takeuchi, Hideya Ikemoto, Hironori Tsukamoto, Nobuaki Yasumoto
  • Publication number: 20110167439
    Abstract: Disclosed herein is a slip prevention member for a turntable. A friction layer prevents a slip of a disk placed on an upper surface thereof. A hardness reinforcing layer is provided under the lower surface of the friction layer. An adhesive layer is provided under the lower surface of the hardness reinforcing layer. A releasable sheet is attached to the lower surface of the adhesive layer. The slip prevention member reduces use of environmentally toxic material and uses the hardness reinforcing layer, thus preventing occurrence of vibrations and noise which may be induced when the hardness of the slip prevention member is relatively low.
    Type: Application
    Filed: March 2, 2010
    Publication date: July 7, 2011
    Inventors: Young Sun YOO, Yeol CHOI, Jun Kyu PARK
  • Patent number: 7685614
    Abstract: An optical disk drive is adapted for reading data from an optical disk. The optical disk drive includes a housing, a tray, and a read module. The tray is disposed in the housing and is adapted for ejecting from the housing. The read module is adapted for reading data from an optical disk. The read module includes a turntable and an optical read head. The turntable includes a number of engaging springs, in which at least one of the engaging springs include added material for superposing the center of the optical disk and the center of the turntable. Furthermore, the optical read head is adapted to move along a tracking path for reading data from the optical disk.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: March 23, 2010
    Assignee: LITE-ON IT Corporation
    Inventors: Chun-Lung Ho, Yi-Cheng Tsao
  • Patent number: 7480926
    Abstract: A deviation adjustment mechanism for spindle motor and pickup head of optical disk drives includes an optical disk drive dock for holding a pickup head and a motor holding seat for holding a spindle motor. The motor holding seat has a retaining flange on one edge. The optical disk drive dock and the motor holding seat are connected by an elastic element to move the motor holding seat in one direction in normal conditions. An adjusting member is provided to press the retaining flange to move the motor holding seat towards another side to adjust the deviation of the spindle motor and the pickup head of the optical disk drive.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: January 20, 2009
    Assignee: Micro-Star Int'l Co., Ltd.
    Inventor: Yi-Wei Lu
  • Patent number: 7454770
    Abstract: Disclosed is an apparatus for reading information recorded on the track of a data carrier (1). The apparatus comprises a rotating device (2) for supporting and rotating the data carrier (1) around an axis of rotation (3). The rotating device (2) comprises a turntable (21) and a motor (23) for rotating the turntable (21). The apparatus according to the invention is able to suppress a wobble introduced by the data carrier (1) when rotated. This is done by a flexible part (24) in the rotating device (2). In an embodiment the supporting surface of the turntable (21) comprises the flexible part (24). This allows the data carrier (1) to tilt in radial and tangential direction. The centrifugal forces, which are present when rotation the data carrier (1), are able to level the data carrier (1), thus reducing the wobble.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: November 18, 2008
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Aik Seng Yak, Madan Pushpakath
  • Patent number: 7448266
    Abstract: A fabrication method of an optical disk drive is provided. The method adapted for alleviating the eccentric issue of a loaded optical disk. The optical disk drive, for example, includes a turntable having a plurality of engaging springs. The engaging springs are adapted to secure the optical disk through a hole in the center of the optical disk. The steps for fabricating the optical disk drive include the following: first, the eccentric degree of the optical disk caused by the engaging springs is measured. Then a result is obtained. According to the obtained result, material is added to at least one of the engaging springs or a part of original material is removed from at least one of the engaging springs.
    Type: Grant
    Filed: September 5, 2005
    Date of Patent: November 11, 2008
    Assignee: Lite-On It Corporation
    Inventors: Chun-Lung Ho, Yi-Cheng Tsao
  • Publication number: 20070283376
    Abstract: There is provided an optical disk apparatus that can inhibit, during recording or reproduction of data on or from an optical disk, a side runout that may occur in the optical disk in its circumferential direction as a result of Coriolis force when a disk rotating shift is subjected to procession movement, thereby allowing recording and reproducing quality to be stabilized and a reduced size of the apparatus. The disk apparatus provided has pressure pawls arranged at intervals smaller than those in the prior art, each of which is provided with a plurality of pressing points arranged at intervals larger than those in the prior art. Particularly, an interval between the pressure pawls is an acute angle in terms of the center angle of the disk. An interval between the pressing points is an angle of 35° or larger.
    Type: Application
    Filed: January 26, 2007
    Publication date: December 6, 2007
    Applicant: Hitachi, Ltd.
    Inventors: Takao Naito, Kazuyuki Kodama, Akinori Shiozawa, Hisataka Sugiyama
  • Patent number: 7191458
    Abstract: A turnable for mounting an optical disk without the occurrence of eccentricity including: a fixed portion (48) fitted in a center hole of the optical disk; a movable portion (50) fitted in the center hole with the fixed portion (48) as a reference so as to be elastically deformed to correct the eccentricity when the optical disk is mounted; a shaft portion (42) molded integrally with the fixed portion (48) and into which is inserted a drive shaft (14a) of a drive motor for rotating a turntable (12) continuously; and a plate spring (60) for returning, when the optical disk is not mounted, the movable portion (50) from a position when the optical disk is mounted to a position when not mounted. The plate spring (60) is secured to the shaft portion (42) directly.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: March 13, 2007
    Assignee: Sony Corporation
    Inventor: Shunji Tokumitsu
  • Patent number: 7127731
    Abstract: Disclosed is an apparatus for reading information recorded on the track of a data carrier (1). The apparatus comprises rotating means (2) for supporting and rotating the data carrier (1) around an axis of rotation (3). The rotating means (2) comprises a turntable (21) and a motor (23) for rotating the turntable (21). The apparatus according to the invention is able to suppress a wobble introduced by the data carrier (1) when rotated. This is done by a flexible part (24) in the rotating means (2). In an embodiment the supporting surface of the turntable (21) comprises the flexible part (24). This allows the data carrier (1) to tilt in radial and tangential direction. The centrifugal force which are present when rotation the data carrier (1), are able to level the data carrier (1), thus reducing the wobble.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: October 24, 2006
    Assignee: Koninklijke Philips Electronics N. V.
    Inventors: Aik Seng Yak, Madan Pushpakath
  • Patent number: 7051346
    Abstract: A disk drive includes a turntable and a clamper. The turntable and/or the clamper have four or more projections, each of which has predetermined height. The projections are arranged at positions for supporting/holding a mounted disk by using the four or more projections, wherein the projections are located at substantially equal intervals around a circumference of the turntable/clamper and the tips of the projections are substantially in the same plane.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: May 23, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kiyoshi Masaki, Kazuhiro Mihara, Shuichi Yoshida, Teruyuki Naka, Sachio Fukuyama, Noriaki Urayama, Masaaki Kikugawa, Makoto Maruoka, Shinichiro Obayashi
  • Patent number: 6938265
    Abstract: A turntable for a disk storage medium includes disk mounting section, shaft center boss and ribs. The disk mounting section includes disk mount surface, center boss and inner side surface. The disk mount surface is used to mount the disk medium thereon. The center boss has an outer side face that engages with a center hole of the disk medium. The inner side face defines a space that has a center axis aligned with that of the center boss. The shaft center boss includes an outer side face and a hole into which a rotating shaft is inserted so as to transmit a driving force to, and rotate, the disk medium. The ribs join the outer side face of the shaft center boss and the inner side face of the disk mounting section together so that through holes are formed between these side faces.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: August 30, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kozo Ezawa, Masanao Wakikawa, Kazuo Teramae, Terumi Tatsumi
  • Patent number: 6865744
    Abstract: A device for rotating inside of a disk player and/or recorder a disk shaped data carrier which takes into account that the rotating disk may be eccentered from an imposed rotation axis. A side moving apparatus allows the rotating disk and a fixing device to which the disk is removably fixed, to move inside the player and/or recorder in a rotation plane substantially perpendicular to an axis of rotation of the fixing device. The rotating disk and the fixing device go into a gyroscopic movement inside the player. A plurality of examples to realize the invention are described.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: March 8, 2005
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Klaus Oldermann, Heinz-Joerg Schroeder
  • Patent number: 6829777
    Abstract: A turntable for mounting an optical disk without occurrence of eccentricity including: a fixed portion (48) fitted in a centre hole of the optical disk; a movable portion (50) fitted in the center hole with the fixed portion (48) as a reference so as to be elastically deformed to correct eccentricity when the optical disk is mounted; a shaft portion (42) molded integrally with the fixed portion (48) and into which is inserted a drive shaft (14a) of a drive motor for rotating a turntable (12) continuously; and a plate spring (60) for returning, when the optical disk is not mounted, the movable portion (50) from a position when the optical disk is mounted to a position when not mounted. The plate spring (60) is secured to the shaft portion (42) directly.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: December 7, 2004
    Assignee: Sony Corporation
    Inventor: Shunji Tokumitsu