JP2004213812A - Disk chucking mechanism and motor with the same - Google Patents

Disk chucking mechanism and motor with the same Download PDF

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Publication number
JP2004213812A
JP2004213812A JP2003001572A JP2003001572A JP2004213812A JP 2004213812 A JP2004213812 A JP 2004213812A JP 2003001572 A JP2003001572 A JP 2003001572A JP 2003001572 A JP2003001572 A JP 2003001572A JP 2004213812 A JP2004213812 A JP 2004213812A
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disk
recording disk
alignment
turntable
recording
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JP2003001572A
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JP4084842B2 (en
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Takaaki Nishioka
孝哲 西岡
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Nidec Corp
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Nidec Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To suppress variation in centering accuracy at the time of disk chucking. <P>SOLUTION: In a disk chucking mechanism that can hold a recording disk D, the central hole of which is fitted to a disk centering part 24 of a turntable 16 on the turntable 16 in a freely mountable and detachable way by engaging a plurality of chucking pawls 34 with the circumferential part of the central hole of the recording disk D, a chucking pawl part 38 formed by connecting the three chucking pawls 34 to one ring member 36 through a coil spring 32 is provided in the disk centering part 24. Force generated at the time of disk chucking is evenly dispersed in such a manner that the ring member 36 formed by an elastic member deforms. This prevents centering deviation and suppresses variation in centering accuracy each time the recording disk D is clamped. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、CD−ROM、DVD等の着脱自在な記録ディスクを回転させるために、記録ディスクを着脱自在に保持するディスクチャッキング機構、及びこれを備えたモータに関する。
【0002】
【従来の技術】
一般に、CD−ROMやDVD等の記録ディスクにアクセスして、データの読み/書きを行うディスク駆動装置では、記録ディスクと、データの読み/書きを行うピックアップとの位置関係を高精度に保つ必要があり、回転中の記録ディスクとピックアップとの間に位置ズレが生じると、データの読み/書きが困難となり、例えば、再生された音楽や映像が劣化したものとなってしまう。
【0003】
そして、これらの記録ディスクは一般に合成樹脂により形成されるので、ディスク駆動装置のターンテーブルに装着するために設けられる記録ディスクの中央孔の内径寸法にバラツキが生じ易く、その誤差の程度によっては、記録ディスクがターンテーブルに同芯度良く装着されず、回転中の記録ディスクとピックアップとの間に位置ズレが生じてしまう。
【0004】
そこで、従来、ディスク駆動装置にディスク調芯機構を設け、ターンテーブルに載置される記録ディスクを調芯(センタリング)して正しい位置に配置し、回転中の記録ディスクとピックアップとの間の位置ズレを抑制した。
【0005】
このような従来のディスク調芯機構は、シャフトに直交状に固着されたターンテーブルに平面視環状の調芯部を備え、調芯部にはその外周上端に複数個の調芯爪を有する調芯爪部が設けられ、調芯爪部はバネの弾性変形により調芯爪がシャフト側に揺動可能となり、記録ディスクの中央孔の周縁部に押圧状に当接可能となる。このように記録ディスクをターンテーブルに装着する際、記録ディスクの中央孔の内径寸法に若干のバラツキがあっても、そのバラツキは調芯爪部が揺動することで吸収され、記録ディスクが調芯されて確実にターンテーブルに装着される。(例えば、特許文献1参照)。
【0006】
【特許文献1】
特開2002−237118号公報
【0007】
【発明が解決しようとする課題】
しかしながら、従来のディスク調芯機構の調芯爪部は、複数個の調芯爪部のそれぞれのバネによる付勢力が一定でない場合は、記録ディスクをターンテーブルに固定することはできるが調芯ズレを生じ、記録ディスクを固定する度に調芯精度にバラツキが生じる。記録ディスクの調芯精度が低下すると、回転軸芯に対してターンテーブル及びディスクの重心位置が偏在してしまうことから、振れ回りや異常振動・騒音の増大又はデータの読み/書きのエラーが発生する。また、高速回転時には記録ディスクの飛散(外れ)により、ディスク駆動装置や記録ディスクが損傷するおそれがある。
【0008】
本発明は上記問題点に鑑みなされたものであり、調芯ズレを防止し、記録ディスクをチャッキングする度に生じる調芯精度のバラツキを抑え、振れ回りや異常振動・騒音の増大又はデータの読み/書きのエラーの発生、記録ディスクの飛散(外れ)によるディスク駆動装置や記録ディスクの損傷を防止するディスクチャッキング機構及びこれを備えたモータを提供することを目的とする。
【0009】
【課題を解決するための手段】
請求項1に記載のディスクチャッキング機構は、中央孔を有する記録ディスクが着脱自在に載置されるターンテーブルと、該ターンテーブルの中央部に一体的かつ同心状に配置され、前記記録ディスクの中央孔が挿通される略円筒状のディスク調芯部と、該ディスク調芯部の外周面から半径方向外方に突出し、前記記録ディスクの中央孔の周縁部に弾発的に係合するよう個々独立のバネによって付勢される複数個の調芯爪とを有するディスクチャッキング機構において、前記バネの前記調芯爪とは反対側の端部は、リング部材によって連結されており、該リング部材と前記バネと前記調芯爪とによって前記記録ディスクを前記ターンテーブル上に調芯し保持する調芯爪部が形成されている。複数個の爪部材を1つのリング部材によって連結することで、ディスクチャッキング時に生じる力を均一に分散させて、調芯ズレを防止し、記録ディスクをチャッキングする度に生じる調芯精度のバラツキを抑えることができるので、振れ回りや異常振動・騒音の増大又はデータの読み/書きのエラーの発生の防止や、高速回転時におけるディスクの飛散(外れ)によるディスク駆動装置や記録ディスクの損傷を防止できる。
【0010】
請求項2に記載のディスクチャッキング機構は、請求項1にかかるものにおいて、前記リング部材が弾性部材で形成されているので、ディスクチャッキング時に生じる不均一な力をリング部材が塑性変形することで均一に分散させるので、より効果的に調芯ズレを防止し、記録ディスクをチャッキングする度に生じる調芯精度のバラツキを抑えることができるので、振れ回りや異常振動・騒音の増大又はデータの読み/書きのエラーの発生の防止や、高速回転時におけるディスクの飛散(外れ)によるディスク駆動装置や記録ディスクの損傷を防止できる。
【0011】
請求項3に記載のモータは、請求項1又は2に記載のディスクチャッキング機構により、調芯ズレを防止し、記録ディスクをチャッキングする度に生じる調芯精度のバラツキを抑えることができるので、振れ回りや異常振動・騒音の増大又はデータの読み/書きのエラーの発生の防止や、モータの高速回転時におけるディスクの飛散(外れ)によるディスク駆動装置や記録ディスクの損傷を防止できる。
【0012】
更に、この請求項1又は2に記載のディスクチャッキング機構を備えた請求項3に記載のモータは、仮に粗悪な記録ディスクを装着する場合であっても、記録ディスクがディスクチャッキング機構に対して正確な位置に保持されるため、そのような記録ディスクを当該モータによって回転させると、高い回転特性を実現できるので、各種の記録ディスクのデータを高精度に読み/書きすることができる。
【0013】
【発明の実施の形態】
以下、本発明にかかるディスクチャッキング機構及びこれを備えたモータの実施形態について、図1及び図2を参照して説明するが、本発明は以下に示す実施形態に限定されるものではない。尚、本実施形態の説明では便宜上各図面の上下方向を「上下方向」とするが、実際の取付状態における方向を限定するものではない。
【0014】
図1は、本発明の実施形態にかかるディスクチャッキング機構を備えたモータの断面図である。図2は、本発明の実施形態にかかるディスクチャッキング機構を含むターンテーブルの平面図である。図1及び図2において、記録ディスクDのデータの読み/書きをするディスク駆動装置(図示なし)に取り付けられるベース2には軸受ホルダ4が設けられ、この軸受ホルダ4の内周面に含油メタルからなる円筒状のラジアル軸受6が嵌合固定されている。軸受ホルダ4の下端部にはスラスト軸受8とそれを保持するカバー部材10が取り付けられ、軸受ホルダ4の外周にはステータ12が固定されている。
【0015】
ラジアル軸受6とスラスト軸受8により回転軸14が上下方向(軸線方向)に回転軸線を有するように回転自在に支持され、回転軸14の上端部に略円板状のターンテーブル16が固定されている。ターンテーブル16の上面の外周部付近には、記録ディスクDの滑り止めを兼ねる円環状の緩衝材26が取り付けられ、これを介して記録ディスクDが載置される。緩衝材26はゴムのように表面の摩擦力が大きく、弾力のある材質のものであれば良い。ターンテーブル16の下面の外周部付近には、略円筒状のバックアイアン18が取り付けられており、そのバックアイアン18の内周面には円環状のマグネット20がステータ12に対向するように設けられている。
【0016】
軸受ホルダ4の上端外周部には鍔部4aが設けられ、この鍔部4aと、これに隣接するターンテーブル16の下面内方部に設けられた抜け止め22とが係合することによって、ターンテーブル16が上方へ抜け出ないように構成されている。
【0017】
ターンテーブル16は、このターンテーブル16に一体的かつ同心に形成され、記録ディスクDが嵌合される略円筒状の樹脂製のディスク調芯部24と、このディスク調芯部24に半径方向外方に突出するように付勢され、ディスク調芯部24の内外を移動するように設けられた樹脂製の調芯爪34を有する調芯爪部38とからなる。
【0018】
ディスク調芯部24は、中央孔を有する円板状の上面壁24aと、上面壁24aの外周につらなる外周壁24bと、外周壁24bの下端から半径方向外方にのびる鍔部24cと、上面壁24aの内周につらなる内周壁24dとからなる。ターンテーブル16の円筒部16aにディスク調芯部24の内周壁24dが嵌合され、ターンテーブル16の上面とでディスク調芯部24の内部に中空空間を構成している。
【0019】
ディスク調芯部24の内部には調芯爪34を収容する通路24eが軸心を中心として放射状に等間隔の位置に3ヶ所設けられている。上面壁24aの通路24eの上方、外周壁24bの通路24eの径方向外方は開口している。調芯爪34は、記録ディスクDが当接する部分の上面視の稜線が円弧状である爪部34aと、コイルバネ32の外端を受ける円柱部34bとからなり、円柱部34bに設けられた凸部34cにコイルバネ32がはめこまれている。なお、通路24eは必ずしも等間隔に設ける必要はなく、要求される記録ディスクDに対する抜去力等に応じて周方向に偏倚して位置するように設けることも可能である。
【0020】
上記したディスク調芯部24によって形成される中空空間内には、内周壁24dの外径より大きな内径を有する円環状のリング部材36が配置されており、このリング部材36は、例えば、反発弾性、耐磨耗性、衝撃強度に優れた天然ゴム、クロロブレンゴム、ウレタンゴム等の弾性部材によって形成され、その外周には径方向外方に等間隔の位置に3ヶ所の凸部36aが設けられている。凸部36aには、コイルバネ32の内端がはめ込まれ、3個の調芯爪34はコイルバネ32を介してリング部材36に連結されることにより調芯爪部38が一体形成される。
【0021】
ディスク調芯部24の外径は、記録ディスクDの中央孔の径より数μmほど小さく設定されているため、記録ディスクDはディスク調芯部24に互いが過剰に摺れることなく、しかもディスク調芯部24の中心から大幅にずれて偏心することなく嵌合することができる。
【0022】
記録ディスクDの中央孔をディスク調芯部24にはめ込むと、記録ディスクDの下面内周部が調芯爪34に接触する。この状態で記録ディスクDを下方向に押圧すると、その押圧力で調芯爪34がコイルバネ32の付勢力に抗して径方向内方に移動し、記録ディスクDの下方向への移動が可能となる。
【0023】
記録ディスクDを緩衝材26に接触するまで移動させ、ターンテーブル16に載置すると、ディスク調芯部24の内部に収容されていた調芯爪34がコイルバネ32の付勢力によって径方向外方に移動し、記録ディスクDはターンテーブル16上に固定される。記録ディスクDをディスク調芯部24に装着することにより、調芯爪34は、若干半径方向内方に移動しているため、無負荷時よりも大きな弾性力が記録ディスクDに作用し、記録ディスクDは調芯爪34によって、ターンテーブル16に固定される。
【0024】
調芯爪34を径方向外方に付勢する3個のコイルバネ32の弾性力はそれぞれバラツキがある。3個の調芯爪34がそれぞれコイルバネ32を介してリング部材36によって一体となり、調芯爪部38が形成されている。記録ディスクDの装着時には、それぞれのコイルバネ32の弾性のバラツキによる記録ディスクDに作用する径方向外方の不均一な力は、弾性部材で形成されたリング部材36が変形することによって吸収される。よって、3個の調芯爪34が記録ディスクDを保持する力が均等となり、軸心に対して無理なく調芯することができる。
【0025】
故に、コイルバネ32を介して3個の調芯爪34を1つのリング部材36に結びつけることで一体となった調芯爪部38によって、ディスクチャッキング時に生じる力を均一に分散させ、調芯ズレを防止し、記録ディスクをチャッキングする度に生じる調芯精度のバラツキを抑えることができるので、振れ回りや異常振動・騒音の増大又は記録ディスクのデータの読み/書きのエラーの発生の防止や、モータの高速回転時における記録ディスクの飛散(外れ)によるディスク駆動装置や記録ディスクの損傷を防止できる。
【0026】
更に、このディスクチャッキング機構を備えたモータは、仮に粗悪な記録ディスクを装着する場合であっても、記録ディスクがディスクチャッキング機構に対して正確な位置に保持されるため、そのような記録ディスクを当該モータによって回転させると、高い回転特性を実現できるので、各種の記録ディスクのデータを高精度に読み/書きすることができる。
【0027】
このディスクチャッキング機構から記録ディスクDを外す場合は、記録ディスクDを軸線方向に上昇させる。このとき、コイルバネ32の付勢力に逆らって記録ディスクDから調芯爪34に半径方向内方に付勢力が作用するため、調芯爪34は通路24e上を移動してディスク調芯部24内に再び収容され、記録ディスクDが軸線方向上方に移動し、記録ディスクDを外すことができる。
【0028】
以上、本発明にかかる実施形態について説明したが、本発明の範囲はこれに限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々変更が可能である。例えば、リング部材36は、その内径がディスク調芯部24の内周壁24dの外径より大きい場合は、弾性部材でなくてもよい。また、リング部材36が弾性部材で形成されている場合は、その内径がディスク調芯部24の内周壁24dの外径と同じ又は若干小さくてもよい。
【0029】
更に、リング部材36に連結されるコイルバネ32は、記録ディスクDの中央孔の周縁部に調芯爪34を弾発的に係合させるためのものであるので、コイルバネ32の代わりに球形状のゴムボール等のような弾性部材を用いても良い。
【0030】
【発明の効果】
請求項1に記載のチャッキング機構によれば、バネを介して複数個の調芯爪を1つのリング部材によって連結することで、ディスクチャッキング時に生じる力を均一に分散させて、調芯ズレを防止し、記録ディスクをチャッキングする度に生じる調芯精度のバラツキを抑えることができるので、振れ回りや異常振動・騒音の増大又はデータの読み/書きのエラーの発生の防止や、高速回転時におけるディスクの飛散(外れ)によるディスク駆動装置や記録ディスクの損傷を防止できる。
【0031】
請求項2に記載のディスクチャッキング機構は、前記リング部材が弾性部材で形成されているので、ディスクチャッキング時に生じる不均一な力をリング部材が塑性変形することで均一に分散させ、より効果的に調芯ズレを防止し、記録ディスクをチャッキングする度に生じる調芯精度のバラツキを抑えることができるので、振れ回りや異常振動・騒音の増大又はデータの読み/書きのエラーの発生の防止や、高速回転時における記録ディスクの飛散(外れ)によるディスク駆動装置や記録ディスクの損傷を防止できる。
【0032】
請求項3に記載のモータは、請求項1又は2に記載のディスクチャッキング機構により、調芯ズレを防止し、記録ディスクをチャッキングする度に生じる調芯精度のバラツキを抑えることができるので、振れ回りや異常振動・騒音の増大又はデータの読み/書きのエラーの発生の防止や、モータの高速回転時における記録ディスクの飛散(外れ)によるディスク駆動装置や記録ディスクの損傷を防止できる。
【0033】
更に、この請求項1又は2に記載のディスクチャッキング機構を備えた請求項3に記載のモータは、仮に粗悪な記録ディスクを装着する場合であっても、記録ディスクがディスクチャッキング機構に対して正確な位置に保持されるため、そのような記録ディスクを当該モータによって回転させると、高い回転特性を実現できるので、各種の記録ディスクのデータを高精度に読み/書きすることができる。
【図面の簡単な説明】
【図1】本発明の実施形態にかかるディスクチャッキング機構を備えたモータの断面図。
【図2】本発明の実施形態にかかるディスクチャッキング機構を含むターンテーブルの平面図。
【符号の説明】
D 記録ディスク
16 ターンテーブル
24 ディスク調芯部
32 コイルバネ
34 調芯爪
36 リング部材
38 調芯爪部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disk chucking mechanism for detachably holding a recording disk in order to rotate a removable recording disk such as a CD-ROM and a DVD, and a motor including the disk chucking mechanism.
[0002]
[Prior art]
2. Description of the Related Art In general, in a disk drive device that accesses a recording disk such as a CD-ROM or a DVD and reads / writes data, it is necessary to maintain a high positional relationship between the recording disk and a pickup that reads / writes data. If a displacement occurs between the rotating recording disk and the pickup, it becomes difficult to read / write data, and, for example, the reproduced music or video is deteriorated.
[0003]
Since these recording disks are generally formed of a synthetic resin, the inner diameter of the center hole of the recording disk provided for mounting on the turntable of the disk drive tends to vary, and depending on the degree of the error, The recording disk is not mounted on the turntable with good concentricity, and a displacement occurs between the rotating recording disk and the pickup.
[0004]
Therefore, conventionally, a disk drive mechanism is provided with a disk alignment mechanism, the recording disk mounted on the turntable is aligned (centered) and arranged at a correct position, and the position between the rotating recording disk and the pickup is adjusted. The displacement was suppressed.
[0005]
Such a conventional disk alignment mechanism includes an annular alignment portion in a plan view on a turntable fixed to a shaft orthogonally to the shaft, and the alignment portion has a plurality of alignment nails at the upper end of the outer periphery thereof. A centering claw portion is provided, and the centering claw portion can swing toward the shaft side by elastic deformation of a spring, so that the centering claw portion can be pressed against the peripheral portion of the center hole of the recording disk. When the recording disk is mounted on the turntable in this way, even if there is a slight variation in the inner diameter of the center hole of the recording disk, the variation is absorbed by the swing of the alignment claw, and the recording disk is adjusted. Cored and securely mounted on turntable. (For example, see Patent Document 1).
[0006]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-237118
[Problems to be solved by the invention]
However, when the biasing force of each of the plurality of centering claw portions is not constant, the centering claw portion of the conventional disk centering mechanism can fix the recording disk to the turntable, but the centering misalignment is not possible. And the alignment accuracy varies each time the recording disk is fixed. If the centering accuracy of the recording disk is reduced, the center of gravity of the turntable and the disk will be eccentrically located with respect to the rotation axis, causing whirling, an increase in abnormal vibration and noise, or data reading / writing errors. I do. Further, at the time of high-speed rotation, the disk drive device and the recording disk may be damaged due to the scattering (separation) of the recording disk.
[0008]
The present invention has been made in view of the above problems, and prevents alignment deviation, suppresses variation in alignment accuracy that occurs each time a recording disk is chucked, increases whirling, abnormal vibration / noise, or reduces data. An object of the present invention is to provide a disk chucking mechanism for preventing a disk drive device and a recording disk from being damaged due to occurrence of a read / write error and scattering (separation) of a recording disk, and a motor having the disk chucking mechanism.
[0009]
[Means for Solving the Problems]
The disc chucking mechanism according to claim 1, wherein a turntable on which a recording disc having a center hole is removably mounted is disposed integrally and concentrically at the center of the turntable, and A substantially cylindrical disk alignment portion into which the center hole is inserted, and a radially outwardly projecting outer peripheral surface of the disk alignment portion that resiliently engages with the peripheral edge of the central hole of the recording disk. In a disc chucking mechanism having a plurality of alignment pawls biased by independent springs, an end of the spring opposite to the alignment pawl is connected by a ring member, and The member, the spring, and the alignment claw form an alignment claw portion for aligning and holding the recording disk on the turntable. By connecting a plurality of claw members by one ring member, a force generated during disc chucking is evenly dispersed, alignment misalignment is prevented, and variation in alignment accuracy occurs each time a recording disk is chucked. To prevent whirling, abnormal vibration / noise, data reading / writing errors, and damage to the disk drive and recording disk due to disk scattering (disconnection) during high-speed rotation. Can be prevented.
[0010]
According to a second aspect of the present invention, in the disk chucking mechanism according to the first aspect, since the ring member is formed of an elastic member, the ring member is plastically deformed by an uneven force generated at the time of disk chucking. , Which can more effectively prevent misalignment and reduce the variation in alignment accuracy that occurs each time the recording disc is chucked, increasing whirling, abnormal vibration / noise or data In addition, it is possible to prevent the occurrence of read / write errors and prevent the disk drive device and the recording disk from being damaged due to the scattering (separation) of the disk during high-speed rotation.
[0011]
In the motor according to the third aspect, the disc chucking mechanism according to the first or second aspect can prevent misalignment and can suppress variation in alignment accuracy that occurs each time a recording disk is chucked. In addition, it is possible to prevent the occurrence of whirling, abnormal vibration and noise, or the occurrence of data reading / writing errors, and to prevent damage to the disk drive device and the recording disk due to the scattering (separation) of the disk when the motor rotates at high speed.
[0012]
Furthermore, the motor according to claim 3 including the disk chucking mechanism according to claim 1 or 2 allows the recording disk to move with respect to the disk chucking mechanism even when a poor recording disk is mounted. When the recording disk is rotated by the motor, high rotational characteristics can be realized, so that data on various recording disks can be read / written with high accuracy.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a disk chucking mechanism and a motor including the same according to the present invention will be described with reference to FIGS. 1 and 2, but the present invention is not limited to the embodiments described below. In the description of the present embodiment, the vertical direction of each drawing is referred to as “vertical direction” for convenience, but the direction in the actual mounting state is not limited.
[0014]
FIG. 1 is a sectional view of a motor provided with a disk chucking mechanism according to an embodiment of the present invention. FIG. 2 is a plan view of a turntable including the disk chucking mechanism according to the embodiment of the present invention. 1 and 2, a bearing holder 4 is provided on a base 2 attached to a disk drive (not shown) for reading / writing data on a recording disk D, and an oil-impregnated metal is provided on an inner peripheral surface of the bearing holder 4. A cylindrical radial bearing 6 is fitted and fixed. A thrust bearing 8 and a cover member 10 holding the thrust bearing 8 are attached to a lower end of the bearing holder 4, and a stator 12 is fixed to an outer periphery of the bearing holder 4.
[0015]
The rotary shaft 14 is rotatably supported by the radial bearing 6 and the thrust bearing 8 so as to have a rotation axis in the vertical direction (axial direction), and a substantially disk-shaped turntable 16 is fixed to the upper end of the rotation shaft 14. I have. In the vicinity of the outer peripheral portion of the upper surface of the turntable 16, an annular cushioning material 26 also serving as a non-slip of the recording disk D is attached, and the recording disk D is placed via this. The cushioning material 26 may be made of a material having a large surface frictional force such as rubber and having elasticity. A substantially cylindrical back iron 18 is attached near the outer peripheral portion of the lower surface of the turntable 16, and an annular magnet 20 is provided on the inner peripheral surface of the back iron 18 so as to face the stator 12. ing.
[0016]
A flange 4a is provided on the outer periphery of the upper end of the bearing holder 4, and the flange 4a is engaged with a stopper 22 provided on the inner surface of the lower surface of the turntable 16 adjacent to the flange 4a, so that a turn is made. The table 16 is configured not to fall out.
[0017]
The turntable 16 is formed integrally and concentrically with the turntable 16 and has a substantially cylindrical resin-made disk alignment portion 24 into which the recording disk D is fitted. And an alignment claw portion 38 having a resin alignment claw 34 provided to move in and out of the disk alignment portion 24.
[0018]
The disc centering portion 24 includes a disk-shaped upper wall 24a having a central hole, an outer peripheral wall 24b extending from an outer periphery of the upper wall 24a, a flange 24c extending radially outward from a lower end of the outer wall 24b, An inner peripheral wall 24d extending from the inner periphery of the wall 24a. The inner peripheral wall 24d of the disc centering portion 24 is fitted to the cylindrical portion 16a of the turntable 16, and the upper surface of the turntable 16 forms a hollow space inside the disc centering portion 24.
[0019]
Inside the disc centering portion 24, three passages 24e for accommodating the centering claws 34 are provided at three radially spaced positions around the axis. The upper part of the passage 24e of the upper wall 24a and the outer part of the passage 24e of the outer peripheral wall 24b in the radial direction are open. The centering claw 34 is composed of a claw portion 34a having a circular ridge in a top view at a portion where the recording disk D abuts, and a cylindrical portion 34b for receiving the outer end of the coil spring 32, and the protrusion provided on the cylindrical portion 34b. The coil spring 32 is fitted in the portion 34c. The passages 24e are not necessarily provided at equal intervals, but may be provided so as to be deviated in the circumferential direction in accordance with a required pulling force or the like with respect to the recording disk D.
[0020]
An annular ring member 36 having an inner diameter larger than the outer diameter of the inner peripheral wall 24d is disposed in the hollow space formed by the disk centering portion 24. The ring member 36 has, for example, rebound resilience. It is formed of an elastic member such as natural rubber, chlorobrene rubber, urethane rubber, etc., which has excellent wear resistance and impact strength, and has three convex portions 36a at radially outwardly located at equal intervals on its outer periphery. Have been. The inner end of the coil spring 32 is fitted into the projection 36a, and the three alignment claws 34 are connected to the ring member 36 via the coil spring 32, so that the alignment claw portion 38 is integrally formed.
[0021]
Since the outer diameter of the disk centering portion 24 is set to be smaller than the diameter of the center hole of the recording disk D by several μm, the recording disks D are not excessively slid on the disk centering portion 24, and The centering portion 24 can be fitted without being greatly shifted from the center and without eccentricity.
[0022]
When the center hole of the recording disk D is fitted into the disk alignment portion 24, the inner peripheral portion of the lower surface of the recording disk D comes into contact with the alignment claw 34. When the recording disk D is pressed downward in this state, the pressing force causes the centering claw 34 to move radially inward against the urging force of the coil spring 32, thereby allowing the recording disk D to move downward. It becomes.
[0023]
When the recording disk D is moved until it comes into contact with the buffer material 26 and is mounted on the turntable 16, the alignment claw 34 housed inside the disk alignment portion 24 is radially outwardly urged by the urging force of the coil spring 32. After moving, the recording disk D is fixed on the turntable 16. When the recording disk D is mounted on the disk alignment portion 24, the alignment claw 34 is slightly moved inward in the radial direction. The disk D is fixed to the turntable 16 by the centering claws 34.
[0024]
The elastic forces of the three coil springs 32 that urge the alignment claws 34 radially outward vary. The three alignment claws 34 are integrated by a ring member 36 via the coil spring 32, respectively, to form an alignment claw portion 38. When the recording disk D is mounted, the radially nonuniform force acting on the recording disk D due to the variation in elasticity of the coil springs 32 is absorbed by the deformation of the ring member 36 formed of the elastic member. . Accordingly, the force of holding the recording disk D by the three alignment claws 34 becomes equal, and the alignment can be performed easily with respect to the axis.
[0025]
Therefore, the force generated at the time of disc chucking is evenly dispersed by the integrated alignment claw portion 38 by connecting the three alignment claws 34 to one ring member 36 via the coil spring 32, and the alignment deviation is performed. Can prevent fluctuations in alignment accuracy that occur each time the recording disk is chucked, thereby preventing whirling, abnormal vibration / noise, and errors in reading / writing data from / to the recording disk. In addition, it is possible to prevent the disk drive device and the recording disk from being damaged due to scattering (separation) of the recording disk when the motor rotates at a high speed.
[0026]
Further, even if a bad recording disk is mounted, the motor provided with the disk chucking mechanism can keep such a recording disk in an accurate position with respect to the disk chucking mechanism. When the disk is rotated by the motor, high rotation characteristics can be realized, so that data of various recording disks can be read / written with high accuracy.
[0027]
When removing the recording disk D from the disk chucking mechanism, the recording disk D is raised in the axial direction. At this time, since the urging force acts radially inward from the recording disk D on the alignment claw 34 against the urging force of the coil spring 32, the alignment claw 34 moves on the passage 24e and And the recording disk D is moved upward in the axial direction, and the recording disk D can be removed.
[0028]
Although the embodiments according to the present invention have been described above, the scope of the present invention is not limited thereto, and various modifications can be made without departing from the spirit of the present invention. For example, if the inner diameter of the ring member 36 is larger than the outer diameter of the inner peripheral wall 24d of the disk alignment portion 24, the ring member 36 may not be an elastic member. When the ring member 36 is formed of an elastic member, the inner diameter of the ring member 36 may be equal to or slightly smaller than the outer diameter of the inner peripheral wall 24 d of the disk alignment portion 24.
[0029]
Further, since the coil spring 32 connected to the ring member 36 is for resiliently engaging the centering claw 34 with the peripheral portion of the center hole of the recording disk D, a spherical shape is used instead of the coil spring 32. An elastic member such as a rubber ball may be used.
[0030]
【The invention's effect】
According to the chucking mechanism of the first aspect, a plurality of alignment pawls are connected by a single ring member via a spring, so that a force generated at the time of disk chucking is uniformly dispersed, and the alignment deviation is performed. And prevents fluctuations in alignment accuracy that occur each time the recording disk is chucked, thereby preventing whirling, abnormal vibration and noise, data reading / writing errors, and high-speed rotation. It is possible to prevent the disk drive device and the recording disk from being damaged due to the scattering (separation) of the disk at the time.
[0031]
In the disk chucking mechanism according to claim 2, since the ring member is formed of an elastic member, uneven force generated at the time of disk chucking is evenly dispersed by plastically deforming the ring member, which is more effective. Alignment deviation can be prevented, and variations in alignment accuracy that occur each time the recording disk is chucked can be suppressed, resulting in increased whirling, abnormal vibration and noise, or data read / write errors. In addition, it is possible to prevent damage to the disk drive device and the recording disk due to scattering (separation) of the recording disk during high-speed rotation.
[0032]
In the motor according to the third aspect, the disc chucking mechanism according to the first or second aspect can prevent misalignment and can suppress variation in alignment accuracy that occurs each time a recording disk is chucked. In addition, it is possible to prevent whirling, an increase in abnormal vibration / noise, or the occurrence of data reading / writing errors, and to prevent damage to a disk drive device and a recording disk due to scattering (disengagement) of the recording disk during high-speed rotation of the motor.
[0033]
Furthermore, the motor according to claim 3 including the disk chucking mechanism according to claim 1 or 2 allows the recording disk to move with respect to the disk chucking mechanism even when a poor recording disk is mounted. Since such a recording disk is held at an accurate position, when such a recording disk is rotated by the motor, high rotation characteristics can be realized, so that data on various recording disks can be read / written with high accuracy.
[Brief description of the drawings]
FIG. 1 is a sectional view of a motor provided with a disk chucking mechanism according to an embodiment of the present invention.
FIG. 2 is a plan view of a turntable including the disk chucking mechanism according to the embodiment of the present invention.
[Explanation of symbols]
D Recording disk 16 Turntable 24 Disk alignment part 32 Coil spring 34 Alignment claw 36 Ring member 38 Alignment claw part

Claims (3)

中央孔を有する記録ディスクが着脱自在に載置されるターンテーブルと、該ターンテーブルの中央部に一体的かつ同心状に配置され、前記記録ディスクの中央孔が挿通される略円筒状のディスク調芯部と、該ディスク調芯部の外周面から半径方向外方に突出し、前記記録ディスクの中央孔の周縁部に弾発的に係合するよう個々独立のバネによって付勢される複数個の調芯爪とを有するディスクチャッキング機構において、
前記バネの前記調芯爪とは反対側の端部は、リング部材によって連結されており、該リング部材と前記バネと前記調芯爪とによって前記記録ディスクを前記ターンテーブル上に調芯し保持する調芯爪部が形成されていることを特徴とするディスクチャッキング機構。
A turntable on which a recording disk having a center hole is removably mounted; and a substantially cylindrical disk having a central hole of the recording disk which is integrally and concentrically arranged at the center of the turntable. A plurality of core portions, each of which protrudes radially outward from the outer peripheral surface of the disk alignment portion, and which is biased by an independent spring so as to resiliently engage with a peripheral portion of a central hole of the recording disk; In a disk chucking mechanism having a centering claw,
An end of the spring opposite to the alignment nail is connected by a ring member, and the recording disk is aligned and held on the turntable by the ring member, the spring, and the alignment nail. A disk chucking mechanism, wherein a centering claw portion is formed.
前記リング部材が弾性部材で形成されていることを特徴とする請求項1のディスクチャッキング機構。2. The disk chucking mechanism according to claim 1, wherein said ring member is formed of an elastic member. 請求項1又は2に記載のディスクチャッキング機構が一体的に回転するように、このディスクチャッキング機構を備えたモータ。A motor having a disk chucking mechanism such that the disk chucking mechanism according to claim 1 or 2 rotates integrally.
JP2003001572A 2003-01-07 2003-01-07 Disc chucking mechanism and motor equipped with the same Expired - Fee Related JP4084842B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7313801B2 (en) 2004-09-01 2007-12-25 Samsung Electro-Mechanics Co., Ltd. Disk-chucking device of disk drive
US7360227B2 (en) 2004-10-20 2008-04-15 Nidec Corporation Chucking apparatus and recording disk drive motor having chucking apparatus
US7493633B2 (en) 2004-08-04 2009-02-17 Nidec Corporation Drive motor for recording disk and recording disk drive using the drive motor for recording disk
US7890970B2 (en) 2006-10-03 2011-02-15 Nidec Corporation Brushless motor, and disk drive equipped with the same
US8181193B2 (en) * 2008-12-15 2012-05-15 Samsung Electro-Mechanics Co., Ltd. Disk chucking device for alignment of the rotational center of a disk with the center of the disk chucking device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7493633B2 (en) 2004-08-04 2009-02-17 Nidec Corporation Drive motor for recording disk and recording disk drive using the drive motor for recording disk
US7313801B2 (en) 2004-09-01 2007-12-25 Samsung Electro-Mechanics Co., Ltd. Disk-chucking device of disk drive
US7360227B2 (en) 2004-10-20 2008-04-15 Nidec Corporation Chucking apparatus and recording disk drive motor having chucking apparatus
US7890970B2 (en) 2006-10-03 2011-02-15 Nidec Corporation Brushless motor, and disk drive equipped with the same
US7962928B2 (en) 2006-10-03 2011-06-14 Nidec Corporation Brushless motor, and disk drive equipped with the same
US8181193B2 (en) * 2008-12-15 2012-05-15 Samsung Electro-Mechanics Co., Ltd. Disk chucking device for alignment of the rotational center of a disk with the center of the disk chucking device

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