Controlling Acceleration, Deceleration Or Speed Patents (Class 720/602)
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Patent number: 9530448Abstract: The tray braking device includes a tray, a tray motor, a sliding plate and a buffer structure. The tray is used for carrying a disc. The tray motor is used for driving the tray to a finish position from a first position. The sliding plate is disposed on a base. The buffer structure is disposed between the sliding plate and the base. When the tray moves to a second position from the first position, the tray moves at a first speed, and the second position is positioned between the first position and the finish position. When the tray moves towards the finish position from the second position, the tray drives the sliding plate to move, such that the buffer structure leans between the sliding plate and the base and generates deformation, making the tray move at a second speed slower than the first speed.Type: GrantFiled: June 8, 2016Date of Patent: December 27, 2016Assignees: LITE-ON ELECTRONICS (GUANGZHOU) LIMITED, LITE-ON TECHNOLOGY CORPORATIONInventor: Ming-Hung Chung
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Patent number: 9323313Abstract: In response to an external interrupt signal input from a disk eject button 5 to an external interrupt port 2, a control unit 14 wakes up from a sleep mode and shifts to a regular operation mode. A wakeup counter 15 measures the number of times of wakeups. If the number of times of the wakeups reaches a predetermined number of times, an interrupt control unit 11 disables the external interrupt to the external interrupt port 2, and ignores the external interrupt signal thereafter, and the control unit 14 forcefully shifts from the regular operation mode to the sleep mode.Type: GrantFiled: December 24, 2010Date of Patent: April 26, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yoshiharu Osuga, Hirotoshi Matsuki, Takashi Senoo
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Patent number: 9208814Abstract: A compact disc (CD) player and method for ejection control thereof is provided. The CD player has: a CD tray, an eject button, a front-end module, a back-end module, and a fast response eject module, wherein the front-end module and the back-end module are coupled to each other and integrated in an integrated circuit (IC). The fast response eject module has a tray control module for detecting a status of the eject button, and an ejection detection module for controlling the ejecting/inserting of the CD tray according to the detected status of the eject button after the CD player is powered up and before the front-end module starts to work. The CD player of the invention may quickly respond to the status of the eject button and control ejecting/inserting of the CD tray immediately after the CD player is powered up.Type: GrantFiled: November 12, 2014Date of Patent: December 8, 2015Assignee: MEDIATEK SINGAPORE PTE. LTD.Inventors: Yifan Gao, Wei-Sheng Huang, Ming-Tsang Wu
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Patent number: 9009743Abstract: A disk device and a method of driving a tray of the disk device. The method includes outputting a tray driving control signal in response to a tray opening instruction, and maximizing an output voltage of the tray driving control signal during a time period in which the tray is expected to be stalled.Type: GrantFiled: July 11, 2013Date of Patent: April 14, 2015Assignee: Toshiba Samsung Storage Technology Korea CorporationInventors: Ho-Seok Yi, Eun-Seok Ahn, Sang-Phil Hwang
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Publication number: 20150074691Abstract: A compact disc (CD) player and method for ejection control thereof is provided. The CD player has: a CD tray, an eject button, a front-end module, a back-end module, and a fast response eject module, wherein the front-end module and the back-end module are coupled to each other and integrated in an integrated circuit (IC). The fast response eject module has a tray control module for detecting a status of the eject button, and an ejection detection module for controlling the ejecting/inserting of the CD tray according to the detected status of the eject button after the CD player is powered up and before the front-end module starts to work. The CD player of the invention may quickly respond to the status of the eject button and control ejecting/inserting of the CD tray immediately after the CD player is powered up.Type: ApplicationFiled: November 12, 2014Publication date: March 12, 2015Inventors: Yifan GAO, Wei-Sheng HUANG, Ming-Tsang WU
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Patent number: 8914816Abstract: A compact disc (CD) player and method for ejection control thereof is provided. The CD player has: a CD tray, an eject button, a front-end module, a back-end module, and a fast response eject module, wherein the front-end module and the back-end module are coupled to each other and integrated in an integrated circuit (IC). The fast response eject module has a second tray control module for detecting a status of the eject button, and a second ejection detection module for controlling the ejecting/inserting of the CD tray according to the detected status of the eject button after the CD player is powered up and before initialization of the first ejection detection module is completed. Accordingly, the CD player of the invention may quickly respond to the status of the eject button and control ejecting/inserting of the CD tray immediately after the CD player is powered up.Type: GrantFiled: August 30, 2013Date of Patent: December 16, 2014Assignee: MediaTek Singapore Pte. Ltd.Inventors: Yifan Gao, Wei-Sheng Huang, Ming-Tsang Wu
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Patent number: 8799934Abstract: A method for controlling a tray in an optical disc drive comprises: setting first and second flags for indicating a current state of the tray, the state of the tray including an open state, a closed state and a state in which the tray moves; and controlling a movement operation of the tray, base on values of the two flags and a time when a counter electromotive force is generated in a motor for moving the tray. If a request of performing a tray closing operation in the state in which the tray is opened is received, the tray closing operation is performed, and the value of the second flag is changed. If the counter e.m.f is detected after a first time from the time when the tray closing operation is started, the driving of the motor is stopped, and the value of the first flag is changed.Type: GrantFiled: November 8, 2012Date of Patent: August 5, 2014Assignee: Hitachi-LG Data Storage Korea, Inc.Inventors: Sunggoo Chung, Youngki Kim
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Patent number: 8745644Abstract: Provided is a driving circuit for an optical disc drive. The driving circuit includes a digital control processor (DCP) comprising an input port to which a signal for driving a tray is input, and an output port outputting a voltage representing an operating state of the optical disc drive. The driving circuit also includes a tray switch that is connected to the input port, an operation display lamp that is connected in parallel with the tray switch, and an electric connection device for connecting the input port and the output port to each other.Type: GrantFiled: August 1, 2012Date of Patent: June 3, 2014Assignee: Toshiba Samsung Storage Technology Korea CorporationInventor: Hyeon-jun Yang
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Publication number: 20140115611Abstract: A testing method tests a disc loading and transferring mechanism having a tray. The testing method includes steps of: transmitting a tray-out instruction and a tray-in instruction in that order to drive the tray to alternate between a closed position and a opened; counting a first period of the tray moving from the closed position to the opened position and a second period of the tray moving from the opened position to the closed position; determining whether the first counted period and the second counted period are in conformity with predetermined and expected standards, and outputting test results for indicating the disc loading and transferring mechanism is not in conformity with predetermined and expected standards when the first counted period and the second counted period are in conformity with predetermined and expected standards.Type: ApplicationFiled: April 16, 2013Publication date: April 24, 2014Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTDInventors: YA-GUO WANG, CHUN-CHING CHEN
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Publication number: 20140068640Abstract: A compact disc (CD) player and method for ejection control thereof is provided. The CD player has: a CD tray, an eject button, a front-end module, a back-end module, and a fast response eject module, wherein the front-end module and the back-end module are coupled to each other and integrated in an integrated circuit (IC). The fast response eject module has a second tray control module for detecting a status of the eject button, and a second ejection detection module for controlling the ejecting/inserting of the CD tray according to the detected status of the eject button after the CD player is powered up and before initialization of the first ejection detection module is completed. Accordingly, the CD player of the invention may quickly respond to the status of the eject button and control ejecting/inserting of the CD tray immediately after the CD player is powered up.Type: ApplicationFiled: August 30, 2013Publication date: March 6, 2014Applicant: MediaTek Singapore Pte. Ltd.Inventors: Yifan Gao, Wei-Sheng Huang, Ming-Tsang Wu
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Publication number: 20140019999Abstract: A disk device and a method of driving a tray of the disk device. The method includes outputting a tray driving control signal in response to a tray opening instruction, and maximizing an output voltage of the tray driving control signal during a time period in which the tray is expected to be stalled.Type: ApplicationFiled: July 11, 2013Publication date: January 16, 2014Inventors: Ho-Seok YI, Eun-Seok AHN, Sang-Phil HWANG
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Patent number: 8490121Abstract: A slim-type optical disc drive includes a casing and a tray. A first circuit board is disposed within the casing. A second circuit board is disposed on the tray. A spring switch is disposed on the second circuit board. A first end of the spring switch is fixed on the second circuit board. A resistor is connected between the first end of the spring switch and a first power source. A second end of the spring switch is extended outside the second circuit board. In a tray-out status, the second end of the spring switch is not contacted with any object, so that a first status signal is generated. In a tray-in status, the second end of the spring switch is contacted with a conducting zone of a second power source, so that a second status signal is generated.Type: GrantFiled: April 6, 2012Date of Patent: July 16, 2013Assignee: Philips & Lite-on Digital Solutions CorporationInventors: Yuan-Syun Luo, Chih-Ming Yang, Chia-Chun Wei, In-Shuen Lee
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Patent number: 8479223Abstract: A control method for a spindle motor in disk drive including a tray for carrying a disk, a detect switch movable to different inclined positions for detecting different positions of the tray during tray ejection and retraction operation, a firmware for receiving signals transmitted by the detect switch upon reaching the different inclined positions so as to start up the spindle motor in advance.Type: GrantFiled: September 24, 2012Date of Patent: July 2, 2013Assignee: Philips & Lite-On Digital Solutions CorporationInventor: Chun-Lung Ho
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Patent number: 8387079Abstract: According to one embodiment, an information processing apparatus includes a main body, an optical disc drive provided in the main body, an acceleration sensor provided in the main body, and a drive management module provided in the main body. The optical disc drive is configured to output an eject signal to an outside in response to an operation of an eject button. The drive management module is configured to determine whether the main body is shaking or not by using the acceleration sensor when the eject signal is received from the optical disc drive which is in a power-off state, and to supply power to the optical disc drive and send to the optical disc drive a signal instructing opening of a tray of the optical disc drive, when the main body is not shaking.Type: GrantFiled: August 24, 2011Date of Patent: February 26, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Hideaki Andou, Taisuke Furuya, Yasuyuki Mizuura
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Patent number: 8356311Abstract: A method is disclosed to detect the voltage of a limit switch in an optical disc drive. The method includes following steps: loading an optical disc when the voltage of the limit switch is at a high level, completing the disc loading process when the voltage is changed to a low level, sampling the voltage of the limit switch predetermined times when the voltage is changed to the high level again, detecting the sampling voltages, completing the disc ejecting process when the sampling voltages are all at the high level, and determining a voltage bouncing to maintain the disc loaded status to avoid disc ejection misjudgment of the optical disc drive when the sampling voltages are not all at the high level.Type: GrantFiled: September 7, 2011Date of Patent: January 15, 2013Assignee: Quanta Storage Inc.Inventors: Yu-Sheng Wang, Jen-Chen Wu
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Patent number: 8302112Abstract: An optical disc player includes a case, a tray received in the case, and a decelerating member. The tray is adapted to hold an optical disc. The decelerating member integrates with the case, and is capable of stopping the rotating optical disc by friction generated between the decelerating member and edge of the rotating optical disc.Type: GrantFiled: August 30, 2010Date of Patent: October 30, 2012Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Sung-Feng Tsai, Chin-Chia Chang, Fu-Pin Hsieh, Teng-Yuan Chang
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Patent number: 8185919Abstract: An optical disk device which highly precisely positions a disk tray in an ejection position is provided. A controller of an optical disk device drives the disk tray from a storage position toward an exposed position. When a position immediately before the ejection position is detected by a detecting switch, the velocity is reduced, to allow the disk tray to contact a mechanical stopper, for positioning. The controller measures a movement time to the position immediately before the ejection position, and adjusts the drive voltage to increase or decrease the drive voltage for contact with the mechanical stopper according to the measured time.Type: GrantFiled: August 4, 2009Date of Patent: May 22, 2012Assignee: TEAC CorporationInventor: Tatsuya Murata
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Patent number: 8104050Abstract: Disclosed is a slim-type high speed rotation optical disk apparatus having a turn table for loading an optical disk thereon. As compared with conventional ones, a brake pad is located near to the front end so that the brake pad comes into tight contact with a side of the tray's front portion when the tray is inserted. This reduces the noise and vibration of the optical disk apparatus.Type: GrantFiled: December 8, 2008Date of Patent: January 24, 2012Assignee: Hitachi-LG Data Storage, Inc.Inventors: Seiji Hamaie, Nozomu Harada, Shinya Asano
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Patent number: 8060894Abstract: A disk device includes a disk tray, a spindle motor, a chucking section, a loading motor, a tray-in switch, a tray-out switch and a loading motor drive voltage generating section. The loading motor drive voltage generating section generates a drive voltage for the loading motor so that a torque of the loading motor is gradually increased after the tray-out switch detects that the disk tray is not located at a predetermined range between an eject position and a retract position until the tray-in switch detects that the disk tray is located at the retract position.Type: GrantFiled: July 24, 2008Date of Patent: November 15, 2011Assignee: Funai Electric Co., Ltd.Inventor: Yoshiyuki Nakagawa
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Publication number: 20110265104Abstract: An optical disc player includes a case, a tray received in the case, and a decelerating member. The tray is adapted to hold an optical disc. The decelerating member integrates with the case, and is capable of stopping the rotating optical disc by friction generated between the decelerating member and edge of the rotating optical disc.Type: ApplicationFiled: August 30, 2010Publication date: October 27, 2011Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventors: SUNG-FENG TSAI, CHIN-CHIA CHANG, FU-PIN HSIEH, TENG-YUAN CHANG
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Publication number: 20100333119Abstract: A tray control method for a disk drive including a tray for carrying a disk, a detect switch movable to different inclined positions for detecting different positions of the tray during tray ejection and retraction operation, a firmware for receiving signals transmitted by the detect switch upon reaching the different inclined positions so as to adjust a voltage applied to a DC motor and the speed for moving the tray to the different positions such that the tray moves stably when retracting into and ejecting from the disk drive.Type: ApplicationFiled: September 10, 2010Publication date: December 30, 2010Applicant: LITE-ON IT CORPORATIONInventor: Chun-Lung Ho
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Patent number: 7784067Abstract: An optical disk apparatus includes a frame 2 which receives internal devices and can receive an optical disk 27, a tray 5 on which the optical disk 27 is rotatably mounted, a rail 4 which supports the tray so as to be moved between a mounting position where the optical disk 27 is detachably mounted and a receiving position where the optical disk 27 is received in the frame 2, a tray moving means which moves the tray 5 between the mounting position and the receiving position, a tray receiving releasing member which receives and release the tray 5 at the receiving position, and an optical disk rotation suppressing member which exerts a pressing force on the optical disk in cooperation with a tray releasing operation of the tray receiving releasing member and releases the pressing force in cooperation with a tray receiving operation of the tray receiving releasing member.Type: GrantFiled: July 10, 2006Date of Patent: August 24, 2010Assignee: Panasonic CorporationInventors: Masayuki Shiwa, Katsumi Ichinose
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Patent number: 7614061Abstract: A tray loading apparatus includes a tray, a motor, a drive circuit. The tray is movable between a load position and an unload position. The motor is constructed and arranged for bringing the tray to move from the unload position to the load position. The drive circuit is used for apply a loading voltage to the motor and the loading voltage includes at least one gradually increasing stage. A tray unloading apparatus and an optical disc drive are also provided.Type: GrantFiled: November 8, 2006Date of Patent: November 3, 2009Assignee: Hon Hai Precision Industry Co., Ltd.Inventor: Yu-Cheng Ko
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Publication number: 20090265727Abstract: When a normal disk having the diameter of 12 cm is inserted into the disk device, first and second optical detecting elements detect the insertion, and transitions to a first detection state, which initiates transfer operation of first and second transfer rollers. If the disk is further moved to an inner portion of the device, thus pressing first and second detecting pins, first and second detecting switches are turned OFF, and the detecting elements enter a second detection state. Before the transition from the first detection state to the second detection state occurs, a rotating speed of the first and second transfer rollers is set low. After transition to the second detection state, the rotating speed is increased. As a result, a card or other such foreign objects can be removed and a monitoring period can be increased until detection of a normal disk is detected.Type: ApplicationFiled: March 27, 2009Publication date: October 22, 2009Applicants: Alpine Electronics, Inc., Toshiba Alpine Automotive Technology,Inc.Inventors: Tsutomu Tatekawa, Tokio Suzuki, Ichiro Kato, Hiroshi Kawase, Yusuke Yoshida, Nobunori Kodou, Yousuke Kuno
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Publication number: 20090235290Abstract: Disclosed is a slim-type high speed rotation optical disk apparatus having a turn table for loading an optical disk thereon. As compared with conventional ones, a brake pad is located near to the front end so that the brake pad comes into tight contact with a side of the tray's front portion when the tray is inserted. This reduces the noise and vibration of the optical disk apparatus.Type: ApplicationFiled: December 8, 2008Publication date: September 17, 2009Applicant: Hitachi-LG Data Storage, Inc.Inventors: Seiji Hamaie, Nozomu Harada, Shinya Asano
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Patent number: 7386866Abstract: A disk drive comprising a tray (TR) for receiving a disk, the tray (TR) being supported for movement between a first position within a casing (CS) of the disk drive and a second position projecting from the casing (CS), an electric motor for moving the tray (TR) between the first and second positions, and a regulation device for regulating an electric current through the motor for regulating the rotation of the motor. The regulation device comprises a detection device for detecting a back-electromotive voltage produced during rotation of the motor for deriving position information of the tray (TR) with respect to the first and second positions.Type: GrantFiled: June 25, 2004Date of Patent: June 10, 2008Assignee: Koninklijke Philips Electronics N.V.Inventors: Thomas Jan De Hoog, Rob Jacobus Matheus Coolen, George Alois Leonie Leenknegt
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Patent number: 7341339Abstract: In a printer capable of performing recording on a recording medium such as an optical disk, a tray on which the recording medium is set is sent upstream or downstream by being nipped by a driving transfer roller rotatably driven by a motor and a driven transfer roller driven and rotated contacting it. When the tray is in a stillness state in a set position where the recording medium can be set, the assist control means generates rotation torque T1. When an external force F comes in effect on the tray, rotation torque T2 is generated by friction between the driving transfer roller and the tray, but the rotation torque T1 becomes an assist force, and the driving transfer roller rotates while any slip between the tray and the driving transfer roller does not occur.Type: GrantFiled: July 27, 2006Date of Patent: March 11, 2008Assignee: Seiko Epson CorporationInventor: Kazuya Yoshikaie
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Publication number: 20080059983Abstract: There is provided an optical disc drive designed for reading data stored in an optical disc. The optical disc drive includes a body, a driving module, a body wrapping unit, and an access module designed for reading data stored in the optical disc. The driving module and the access module are both disposed in the body. The driving module has a circuit board and a driving element disposed on the circuit board, and the body has a plurality of latching structures. The driving mechanism is secured to the body with the use of the latching structures, and the driving mechanism is secured at one side of the latching structures. Moreover, the body wrapping unit used to cover the body has at least a limiting portion which is positioned at another side of a portion of the latching structures.Type: ApplicationFiled: April 16, 2007Publication date: March 6, 2008Applicant: ASUSTeK COMPUTER INC.Inventors: Yen-Hsing Lin, Chin-Cheng Lin, Ya-Lun Yang
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Patent number: 7334239Abstract: In an optical disc apparatus, a harsh blow sound due to collision of first stoppers of a tray and third stoppers of a main chassis when the tray reaches to a terminal position of drawing thereof is reduced. When a second stopper of the tray contacts with the front end portion of a cam slider, the front end portion of the cam slider is elastically deformed so that moving speed of the tray is largely decelerated. Consequently, the blow sound due to contact of the first stoppers of the tray and the third stoppers of the main chassis is radically reduced.Type: GrantFiled: March 21, 2005Date of Patent: February 19, 2008Assignee: Funai Electric Co., Ltd.Inventor: Tomohiro Kobayashi
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Patent number: 7328441Abstract: An optical disc drive with a positioning mechanism suitable for reading data from an optical disc is provided. The optical disc drive comprises a casing, a tray, a reading module and a rail. The tray is disposed inside the casing. The tray has a first positioning part and is suitable for withdrawing from the casing. The reading module is disposed on the tray and is suitable for reading data from an optical disc. The rail is disposed inside the casing and is suitable for withdrawing from the casing when driven by the tray. The rail has a second positioning part. When the tray is ejected from the casing, the location of the tray relative to the casing is maintained through the first positioning part and the second positioning part. Therefore, an optical disc can be put on the tray or removed from the tray with ease.Type: GrantFiled: June 29, 2005Date of Patent: February 5, 2008Assignee: Lite-On It CorporationInventor: Ming-Chun Tsao
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Patent number: 7296277Abstract: A disk rotation device rotationally driving a disk includes a housing body, a conveyance body installed in the housing body so as to be capable to move between a first position positioned inside of the housing, the first position being where the disk is rotation driven, and a second position positioned outside of the housing body, the second position being where the disk is put on or taken off, a rotation mechanism provided in the conveyance body and having a rotational part which is rotationally driven by a motor and at which rotational part the disk is set, and a braking device which brakes by applying a friction force to the rotational part in a case where the conveyance body is situated at a side of the second position closer than a designated standard position between the first position and the second position, and which turns off application of the friction force in a case where the conveyance body is situated at a side of the first position closer than the standard position.Type: GrantFiled: December 16, 2004Date of Patent: November 13, 2007Assignee: Ricoh Company, Ltd.Inventors: Takehide Ohno, Fumihiro Shimizu
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Patent number: 7290269Abstract: A plurality of switches are pressed by a single switch operating member. A disk recording and/or reproducing apparatus has a switch mechanism operable when a pair of turn arms is turned so as to be spread away from each other by a disk inserted from a disk slot. The switch mechanism includes a plurality of switches, a rotary cam rotatable in ganged relation to angular movement of the turn arms, and a switch operating lever interposed between the rotary cam and the switches for successively pressing the switches in response to rotation of the rotary cam.Type: GrantFiled: July 20, 2004Date of Patent: October 30, 2007Assignee: Sony CorporationInventors: Kenichi Hirano, Takeshi Suzuki, Shinji Ito, Takeshi Sano
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Publication number: 20070169133Abstract: A tray loading apparatus includes a tray, a motor, a drive circuit. The tray is movable between a load position and an unload position. The motor is constructed and arranged for bringing the tray to move from the unload position to the load position. The drive circuit is used for apply a loading voltage to the motor and the loading voltage includes at least one gradually increasing stage. A tray unloading apparatus and an optical disc drive are also provided.Type: ApplicationFiled: November 8, 2006Publication date: July 19, 2007Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: Yu-Cheng Ko
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Publication number: 20070150909Abstract: In a disc drive for achieving cooling of an electronic part therein, as well as, suppressing transmission of noises generated from a disc clamper, etc., a channel member 18 for introducing an outside air into an inside is disposed between a supporting member 15 and a top-cover 10, within an inside thereof is formed a vortex-like channel, extending from a center to an outer periphery thereof. At the center of the channel member 18 is formed an opening 19 for introducing the outside air into the inside of the disc drive, and on the top-cover 10 are provided plural numbers of openings 20 for taking the outside air into the channel member 18. When an optical disc 6 rotates, pressure generated on an upper surface thereof comes to be negative to the outside air, then the outside air is taken from the openings 20, through the vortex-like channel of the channel member 18 and the opening 19, into the inside of the drive, so as to pass through electronic parts, such as, an optical pickup, etc., thereby cooling them.Type: ApplicationFiled: September 28, 2006Publication date: June 28, 2007Inventors: Takayuki Fujimoto, Ikuo Nishida, Kohei Takita, Yoichi Narui, Masahiro Matsuo
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Patent number: 7168079Abstract: A disk apparatus includes a tray that moves with respect to a chassis fixed to an apparatus body to carry a disk, a drive unit that moves in a direction substantially orthogonal to the carrying direction of the tray with respect to the chassis to mount or dismount the disk placed on the tray, a pickup unit provided on the drive unit and having an optical pickup for recording or reproducing the disk, the pickup unit being movable in a radial direction of the disk, and a motor which is arranged on the drive unit and drives the drive unit, pickup unit and tray through a plurality of gears. A worm gear is attached to a motor shaft of the motor. Lead angle of the worm gear is set at 15°–30°.Type: GrantFiled: February 2, 2004Date of Patent: January 23, 2007Assignee: Funai Electric Co., Ltd.Inventor: Hiroaki Iwaasa
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Patent number: 7151717Abstract: A recording medium transport device has: a pair of transport roller units which nip and transport a recording medium and which are disposed at an upstream side and a downstream side of a recording area respectively, the transport roller unit in the upstream side including a drive shaft and an upstream side transmission gear attached to the drive shaft, the transport roller unit in the downstream side including a drive shaft and a downstream side transmission gear attached to the drive shaft; an output shaft; and a drive pinion gear attached to the output shaft and engaging with both the transmission gears. Each of the upstream side transmission gear, downstream side transmission gear and the drive pinion gear is a gear in which two spur gears are integrally formed while phases of the two spur gears are shifted from each other by a half pitch.Type: GrantFiled: June 30, 2004Date of Patent: December 19, 2006Assignee: Brother Kogyo Kabushiki KaishaInventor: Wataru Sugiyama
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Patent number: 7143423Abstract: A disk player includes: a housing; a motor disposed in the housing; a disk tray having a projecting piece at a rear end on each side edge thereof; and dislocation preventive pieces disposed at a front end side of the housing and projecting from the housing so as to respectively face the projecting pieces. An elastic plate and a stopper surface adapted to face a distal end of the elastic plate are formed on each of the projecting pieces and each of the dislocation preventive pieces or either on each of the projecting pieces or each of the dislocation preventive pieces. When the tray is moved forward, the elastic plate is brought into contact with the projecting piece or the dislocation preventive piece and is displaced elastically to thereby apply the brakes to stop the disk tray that is moving forward.Type: GrantFiled: April 1, 2005Date of Patent: November 28, 2006Assignee: Funai Electric Co., Ltd.Inventor: Hiroyuki Arase
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Patent number: 7086729Abstract: In a printer capable of performing recording on a recording medium such as an optical disk, a tray on which the recording medium is set is sent upstream or downstream by being nipped by a driving transfer roller rotatably driven by a motor and a driven transfer roller driven and rotated contacting it. When the tray is in a stillness state in a set position where the recording medium can be set, the assist control means generates rotation torque T1. When an external force F comes in effect on the tray, rotation torque T2 is generated by friction between the driving transfer roller and the tray, but the rotation torque T1 becomes an assist force, and the driving transfer roller rotates while any slip between the tray and the driving transfer roller does not occur.Type: GrantFiled: June 17, 2004Date of Patent: August 8, 2006Assignee: Seiko Epson CorporationInventor: Kazuya Yoshikaie
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Patent number: 7086068Abstract: In an optical disc apparatus, a loading operation and an unloading operation are performed a plurality of times while changing the movement speed of a tray. A movement speed of the tray at which a shock that is produced during a movement of the tray is smaller than an upper limit, and a time period required for the loading operation and the unloading operation is shortest is determined as the movement speed of the tray in the loading operation and the unloading operation. An optical disc placed on the tray can be prevented from being damaged by a shock produced during a movement of the tray, and the time period required for the loading operation and the unloading operation can be prevented from being prolonged.Type: GrantFiled: April 10, 2003Date of Patent: August 1, 2006Assignee: Funai Electric Co., Ltd.Inventor: Katsuichi Inoue
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Patent number: 6981269Abstract: A recording medium driving apparatus is provided. A signal from the tray position sensor 13 is provided to the connection point E to control a mute signal generator 80a in the driver IC. When the system controller is abnormal, the potential of the connection point E is low according to the signal from the tray position sensor 13, even though the HIGH signal is output on the buses 172, 75. The mute signal from the mute signal generator 80a is output, and the sled motor driver, the spindle motor driver and the solenoid driver for driving the solenoid 28b of the lock mechanism are maintained at the off state. Even though the system controller is abnormal, the sled motor and the lock mechanism of the tray are maintained at the non-driven state.Type: GrantFiled: November 12, 2003Date of Patent: December 27, 2005Assignee: Teac Co., Ltd.Inventor: Minoru Minase
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Patent number: 6963519Abstract: A disc device comprising a transfer unit operable to provide a transferring force to a disc inserted from the outside to transfer the disc into a storage area in the device, a sensor unit for detecting the position of the inserted disc, and a control unit for controlling a operational speed of the transfer unit. The control unit controls the operational speed of the transfer unit in the disc loading direction at a low-speed until the disc inserted from the outside reaches the transfer unit. The control unit then adjusts the operational speed of the transfer unit in the disc loading direction from a low-speed to a high-speed when the sensor unit detects that the disc is inserted into the position in which a transferring force from the transfer unit is given to the disc, or after a predetermined period of time has elapsed. Accordingly, the disc device reduces operation noise and resistance when the disc is inserted.Type: GrantFiled: November 13, 2002Date of Patent: November 8, 2005Assignee: Alpine Electronics, Inc.Inventors: Akira Otsuki, Masatoshi Ito
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Publication number: 20040103419Abstract: An optical disk player has a carrier having an accomodation space provided along a side edge thereof, and a modular deceleration device that is coupled to the accomodation space. The deceleration device has a module case body that is formed in one piece, and a plurality of gears, all of which are attached to the module case body.Type: ApplicationFiled: November 14, 2003Publication date: May 27, 2004Inventors: Tsung-Jung Kuo, Cheng-Fu Lee