DISK DEVICE
PROBLEM TO BE SOLVED: To solve a problem wherein there is variation in vibration reduction effect by a balancer during rotation of an unbalanced disk. SOLUTION: A disk device mounted with the balancer 20 in which a plurality of steel balls 21 are enclosed, performs deceleration and re-acceleration o...
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| creator | NAKA AKIYUKI ISHIZUKA MASAKAZU |
| description | PROBLEM TO BE SOLVED: To solve a problem wherein there is variation in vibration reduction effect by a balancer during rotation of an unbalanced disk. SOLUTION: A disk device mounted with the balancer 20 in which a plurality of steel balls 21 are enclosed, performs deceleration and re-acceleration of a disk one time or more in a period until the number of rotation of the disk reaches the target number of rotation during acceleration of the disk in the start of a spindle motor 2. The steel balls 21 deviated from the target position and stopped are moved again to the target position by rotation control of the spindle motor 2, then, vibration and vibration sound caused in the disk device are reduced. COPYRIGHT: (C)2010,JPO&INPIT |
| format | Patent |
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SOLUTION: A disk device mounted with the balancer 20 in which a plurality of steel balls 21 are enclosed, performs deceleration and re-acceleration of a disk one time or more in a period until the number of rotation of the disk reaches the target number of rotation during acceleration of the disk in the start of a spindle motor 2. The steel balls 21 deviated from the target position and stopped are moved again to the target position by rotation control of the spindle motor 2, then, vibration and vibration sound caused in the disk device are reduced. 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SOLUTION: A disk device mounted with the balancer 20 in which a plurality of steel balls 21 are enclosed, performs deceleration and re-acceleration of a disk one time or more in a period until the number of rotation of the disk reaches the target number of rotation during acceleration of the disk in the start of a spindle motor 2. The steel balls 21 deviated from the target position and stopped are moved again to the target position by rotation control of the spindle motor 2, then, vibration and vibration sound caused in the disk device are reduced. COPYRIGHT: (C)2010,JPO&INPIT</description><subject>INFORMATION STORAGE</subject><subject>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2009</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZOB28Qz2VnBxDfN0duVhYE1LzClO5YXS3AxKbq4hzh66qQX58anFBYnJqXmpJfFeAUYGBpZGRsaWpuaOxkQpAgCb6hxv</recordid><startdate>20091001</startdate><enddate>20091001</enddate><creator>NAKA AKIYUKI</creator><creator>ISHIZUKA MASAKAZU</creator><scope>EVB</scope></search><sort><creationdate>20091001</creationdate><title>DISK DEVICE</title><author>NAKA AKIYUKI ; ISHIZUKA MASAKAZU</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2009223957A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2009</creationdate><topic>INFORMATION STORAGE</topic><topic>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>NAKA AKIYUKI</creatorcontrib><creatorcontrib>ISHIZUKA MASAKAZU</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>NAKA AKIYUKI</au><au>ISHIZUKA MASAKAZU</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>DISK DEVICE</title><date>2009-10-01</date><risdate>2009</risdate><abstract>PROBLEM TO BE SOLVED: To solve a problem wherein there is variation in vibration reduction effect by a balancer during rotation of an unbalanced disk. SOLUTION: A disk device mounted with the balancer 20 in which a plurality of steel balls 21 are enclosed, performs deceleration and re-acceleration of a disk one time or more in a period until the number of rotation of the disk reaches the target number of rotation during acceleration of the disk in the start of a spindle motor 2. The steel balls 21 deviated from the target position and stopped are moved again to the target position by rotation control of the spindle motor 2, then, vibration and vibration sound caused in the disk device are reduced. COPYRIGHT: (C)2010,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS |
| title | DISK DEVICE |
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