JP2004146056A - Turntable for spindle motor - Google Patents

Turntable for spindle motor Download PDF

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Publication number
JP2004146056A
JP2004146056A JP2003406781A JP2003406781A JP2004146056A JP 2004146056 A JP2004146056 A JP 2004146056A JP 2003406781 A JP2003406781 A JP 2003406781A JP 2003406781 A JP2003406781 A JP 2003406781A JP 2004146056 A JP2004146056 A JP 2004146056A
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Prior art keywords
turntable
rotor case
media
rotor
resin
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JP2003406781A
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Japanese (ja)
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Tadao Yamaguchi
山口 忠男
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Tokyo Parts Ind Co Ltd
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Tokyo Parts Ind Co Ltd
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Priority to JP2003406781A priority Critical patent/JP2004146056A/en
Publication of JP2004146056A publication Critical patent/JP2004146056A/en
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  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a turntable functioning without using an expensive turntable formed by cutting free-cutting brass and the like, advantageous to costs and allowing a thin plate spring and the like not to be used for pushing the internal diameter part of a medium. <P>SOLUTION: A rising part 8a centering a medium disk and made of resin is integrally formed on the upper side of a rotor case 6, a metal mold insertion hole 8b is provided in a position of the outer periphery of the rising part at a rotor and at least one medium chucking spring part 8c holding the medium via the metal mold insertion hole is formed integrally with the rising part by using the same resin as the rising part. <P>COPYRIGHT: (C)2004,JPO

Description

 この発明は、CD−ROM、DVD−ROMなどのメディア駆動用スピンドルモータ用として好適なターンテーブルに関する。  The present invention relates to a turntable suitable for a spindle motor for driving a medium such as a CD-ROM and a DVD-ROM.

 従来よりCDなどのメディア駆動用ブラシレスモータとしては、図3に示すように円筒型ロータケースKの一側に快削黄銅を切削してなるメディア載置用ターンテーブルTを一体化するとともに他側にマグネットMを配したロータRと、このロータRを支持する軸Sと、この軸Sを支承するハウジングHと、このハウジングHの一部に載置して前記ロータRを駆動させるステータSTを備えたものがある。しかしながらこのようなメディア載置用ターンテーブルTは、黄銅を切削加工して形成するため、このコストや取り付け手間などが問題となる。特にCD−ROMなどのメディアを駆動するには軸垂直度が厳しく要求されているので、メディア載置用ターンテーブルTは軸に取り付けた後、軸を基準に切削して供用する構成が考えられているが、比較的切削しやすい黄銅であっても金属のため軸の空転などの問題がある。
 また、最近ではコスト対策のため、図4に示すように樹脂製のターンテーブルJTを用いるものが現れてきた。しかしながら、メディアディスクをセンタリングするに当たってメディア保持強度確保のためメディアの内径部分を押さえておく薄い板バネBが必要になってしまう。
 さらに、ロータケースの上面をターンテーブルにし、センタリングガイドをロータケースに一体成形したものがある。そしてディスク載置面のアルミニウム快削材をロータケース上面に一体化したものがある。(特許文献1の図5、図7参照)
 しかしながら、このようなものは、ディスク載置面が金属であるので高速回転時にはディスクがスリップしてしまう問題があるし、ディスクの内径を保持するバネ材がないため、ディスクの保持に問題があり、正確にセンタリングできない。
 また、このバネ材をコレットチャックとしてターンテーブル上に同心状に多数備えたものがある。(特許文献2、3参照)
 しかしながら、このようなものは突起部がアンダーカットとなって樹脂では成形ができない。
特開平6−60531号公報 特開昭63−99353号公報 特開平6−89491号公報
Conventionally, as a brushless motor for driving a medium such as a CD, a turntable T for mounting a medium formed by cutting free-cutting brass on one side of a cylindrical rotor case K as shown in FIG. , A shaft R supporting the rotor R, a housing H supporting the shaft S, and a stator ST mounted on a part of the housing H to drive the rotor R. There are things to prepare. However, since such a media mounting turntable T is formed by cutting brass, there are problems in terms of cost, installation labor, and the like. In particular, since a medium such as a CD-ROM is required to have a high degree of perpendicularity to drive a medium, the media mounting turntable T may be mounted on the shaft and then cut with reference to the shaft for use. However, even brass, which is relatively easy to cut, has problems such as shaft idling due to metal.
Recently, as a countermeasure for cost, a device using a turntable JT made of resin has appeared as shown in FIG. However, when the media disk is centered, a thin leaf spring B for holding down the inner diameter portion of the medium for securing the medium holding strength is required.
Further, there is a type in which the upper surface of the rotor case is a turntable and the centering guide is integrally formed with the rotor case. There is a type in which an aluminum free-cutting material for a disk mounting surface is integrated with an upper surface of a rotor case. (See FIGS. 5 and 7 of Patent Document 1)
However, such a disk has a problem in that the disk is slipped during high-speed rotation because the disk mounting surface is made of metal, and has a problem in holding the disk because there is no spring material for holding the inner diameter of the disk. Cannot be centered accurately.
Further, there is a type in which a large number of such spring materials are provided concentrically on a turntable as a collet chuck. (See Patent Documents 2 and 3)
However, in such a case, the protrusions are undercut and cannot be molded with resin.
JP-A-6-60531 JP-A-63-99353 JP-A-6-89491

 この発明の目的は、快削黄銅などを切削してなる高価なターンテーブルを使用しなくても機能を果たすことができるようにしてコスト的に有利ならしめるものであり、別の目的はメディアの内径部分を押さえておくのに別に薄い板バネなどを用いなくてもすむようにすることにある。        An object of the present invention is to make it possible to perform the function without using an expensive turntable formed by cutting free-cutting brass or the like, thereby making it advantageous in terms of cost. An object of the present invention is to eliminate the need to separately use a thin leaf spring or the like to hold down the inner diameter portion.

 上記のような課題を解決するには、請求項1に示すようにロータケースの上側にターンテーブルを構成するもので、ロータケースの上側にメディアディスクをセンタリングする樹脂製の立ち上げ部が該ロータケースに一体に形成され、前記ロータケースの内側に配したマグネットと、前記ロータケースに圧入された軸とからなるロータを備え、さらに、前記ロータに前記立ち上げ部の外周の位置で成形用金型挿入口が設けられ、この成形用金型挿入口を介してメディアを保持する少なくとも1個のメディアチャック用バネ部が前記立ち上げ部と一体に同樹脂で形成されたもので達成できる。
 具体的には、請求項2に示すように、前記ロータケース上面に外周部にメディア載置部が弾力性のある樹脂で一体に形成されているものがよい。
 そして、請求項3に示すように立ち上げ部(8a)とメディア載置部(8)は一体に形成されたものにすると良い。
In order to solve the above problems, a turntable is formed on the upper side of the rotor case as claimed in claim 1, and a rising portion made of resin for centering a media disk is provided on the upper side of the rotor case. A rotor formed integrally with the case and arranged inside the rotor case, and a shaft press-fitted into the rotor case; and a molding metal attached to the rotor at a position on the outer periphery of the rising portion. A mold insertion opening is provided, and at least one media chuck spring portion for holding a medium through the molding die insertion opening can be achieved by being formed integrally with the rising portion from the same resin.
Specifically, it is preferable that a media mounting portion is integrally formed of an elastic resin on an outer peripheral portion of the upper surface of the rotor case.
Further, it is preferable that the rising portion (8a) and the medium placing portion (8) are integrally formed.

 請求項1に示す発明では、メディアチャック用バネ部を特別に用意しなくてすむので、コストと取り付け手間を省くことができ、ロータケースに一体に形成した立ち上げ部(8a)によってメディアディスクのセンタリングができ、成形用金型挿入口によってメディアチャック用バネ部(8c)を立ち上げ部と一体に同一樹脂で形成することができる。
 請求項2に示す発明では、弾力性樹脂によってメディアディスクはスリップしにくくなるので、高速回転用に好適となる。
 請求項3に示す発明では、メディア載置部と立ち上げ部を一体に同一樹脂で形成することができる 
According to the first aspect of the present invention, it is not necessary to specially prepare the spring portion for the media chuck, so that the cost and the labor for mounting can be saved, and the rising portion (8a) formed integrally with the rotor case can form the media disk. Centering can be performed, and the spring portion (8c) for the media chuck can be formed of the same resin integrally with the rising portion by the molding die insertion opening.
According to the second aspect of the present invention, since the elasticity resin makes it difficult for the media disk to slip, it is suitable for high-speed rotation.
According to the third aspect of the present invention, the media mounting portion and the rising portion can be integrally formed of the same resin.

 ロータケースの上側にメディアディスクをセンタリングする樹脂製の立ち上げ部が該ロータケースに一体に形成され、前記ロータケースの内側に配したマグネットと、前記ロータケースに圧入された軸とからなるロータを備え、前記ロータには前記立ち上げ部の外周の位置で成形用金型挿入口が設けられ、この成形用金型挿入口を介してメディアを保持する少なくとも1個のメディアチャック用バネ部が前記立ち上げ部と一体に同樹脂で形成された。
 次にこの発明の実施の形態を図面に基づき説明する。
 図1はこの発明の樹脂製のターンテーブルを備えたブラシレスモータの第1の実施の形態として径方向空隙式コアード型の構成を示す要部断面図、図2は同モータの主要部材の部分の拡大要部断面図である。
A rising portion made of resin for centering a media disk is formed integrally with the rotor case on the upper side of the rotor case, and a rotor including a magnet disposed inside the rotor case and a shaft press-fitted into the rotor case is provided. The rotor is provided with a molding die insertion port at a position on the outer periphery of the rising portion, and at least one media chuck spring portion for holding a medium through the molding die insertion hole is provided with the spring. It was formed of the same resin integrally with the rising portion.
Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view of a main part showing a configuration of a radial gap type cored type as a first embodiment of a brushless motor having a resin turntable of the present invention, and FIG. It is an expanded principal part sectional view.

 図1において、1は薄手のステンレス板などからなるステータベースで、上面にガラスクロスエポキシ板からなる回路基板2を配すると共に、中央に橋絡部1aを残して3個の支骨片1b‥‥を立ち上げ、この支骨片1b‥‥の部分を高摺動性樹脂で一体成形した軸ホルダ3を設けている。この軸ホルダ3の外周には複数個の突極4a‥‥にそれぞれ電機子コイル4b‥‥を巻き線してなるステータコア4が接着、溶着などの手段によって固着され、前記各電機子コイル4b‥‥の端末4cを前記の回路基板2の所定のパターンに半田結線している。 In FIG. 1, reference numeral 1 denotes a stator base made of a thin stainless steel plate or the like, on which a circuit board 2 made of a glass cloth epoxy plate is arranged, and three bridging pieces 1b are left with a bridging portion 1a at the center.軸 is provided, and a shaft holder 3 is formed by integrally molding the portion of the supporting bone piece 1b ‥‥ with a highly slidable resin. A stator core 4 formed by winding armature coils 4b # around a plurality of salient poles 4a # is fixed to the outer periphery of the shaft holder 3 by means such as adhesion or welding. The terminal 4c is connected to a predetermined pattern of the circuit board 2 by soldering.

 一方、ロータRは、前記の軸ホルダ3に直接回転自在に装着した軸5と、この軸5を圧入することによって取り付けられたロータケース6と、このロータケース6の内側において前記ステータコア4の突極4a‥‥に径方向空隙を介して臨ませるように板状のものをカールして圧入固着したリング状ラバーマグネット7からなり、前記ロータケース6の上側にターンテーブルとして機能する樹脂製のメディア載置部8を一体に形成する。このメディア載置部8の内側の軸の周りはセンタリングするメディアの内径よりわずかに小となるように少し立ち上げられ、この立ち上げ部8aの外周に、成型用金型挿入口8bを介して下方に垂下するメディアチャック用バネ部8cを同樹脂で一体に形成してなるものである。この場合、メディアチャック用バネ部8cは3個等分配置するのが望ましいが1個だけでもよい。また、このバネ部8cの外周はメディアディスクの内径よりわずかに大にし、良好なバネ性をもって押圧保持するようにしたものである。
 そして、このようなロータケース6を前記軸に圧入後、図2に示すようにこの軸を基準にして前記メディア載置部8を想像線で示す部分を切削加工することにより軸垂直度を出したものである。
On the other hand, the rotor R includes a shaft 5 directly rotatably mounted on the shaft holder 3, a rotor case 6 attached by press-fitting the shaft 5, and a protrusion of the stator core 4 inside the rotor case 6. A ring-shaped rubber magnet 7 curled and press-fitted and fixed to a plate-shaped material so as to face the pole 4a # via a radial gap, and a resin medium functioning as a turntable above the rotor case 6. The mounting part 8 is formed integrally. The periphery of the shaft inside the media mounting portion 8 is slightly raised so as to be slightly smaller than the inner diameter of the media to be centered, and is formed on the outer periphery of the rising portion 8a via a molding die insertion opening 8b. The media chuck spring portion 8c hanging downward is integrally formed of the same resin. In this case, it is desirable to arrange the media chuck spring portions 8c equally in three pieces, but only one piece may be used. The outer circumference of the spring portion 8c is slightly larger than the inner diameter of the media disk, and is pressed and held with good spring properties.
Then, after such a rotor case 6 is press-fitted into the shaft, as shown in FIG. 2, the media mounting portion 8 is cut at a portion indicated by an imaginary line with respect to the shaft to obtain the shaft perpendicularity. It was done.

 このような樹脂製のターンテーブルは高速回転型メディア用として比較的硬度のある弾力性樹脂を使用するのが望ましい。 タ ー ン It is desirable to use a relatively hard and elastic resin for such a resin turntable for high-speed rotating media.

 この発明は、メディアディスクを載置するスピンドルモータとしてメディアチャック用バネ部を特別に用意しなくてすむので、コストと取り付け手間を省くことができ、DVD,CD,MDなどのディスクメディアを駆動するスピンドルモータに用いて好適なものとなる。 According to the present invention, there is no need to specially prepare a spring portion for a media chuck as a spindle motor for mounting a media disk, so that cost and labor for mounting can be reduced, and disk media such as DVDs, CDs, and MDs are driven. It is suitable for use in a spindle motor.

この発明の樹脂製ターンテーブルを備えたブラシレスモータの第1の実施の形態として径方向空隙式コアード型の構成を示す要部断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a main part showing a configuration of a radial gap type cored type as a first embodiment of a brushless motor provided with a resin turntable of the present invention. 同モータの主要部材の部分の拡大要部断面図である。It is an expanded principal part sectional view of the part of the main member of the motor. 従来のターンテーブルを備えたブラシレスモータの要部断面図である。It is principal part sectional drawing of the brushless motor provided with the conventional turntable. 従来の樹脂製ターンテーブルを備えたブラシレスモータの要部断面図である。It is principal part sectional drawing of the brushless motor provided with the conventional resin-made turntable.

符号の説明Explanation of reference numerals

 1 ステータベース                            
  1a 橋絡部
  1b 支骨片
 2 回路基板
 3 軸ホルダ 
 4 ステータ
  4a 突極
  4b 電機子コイル 
 5 軸
 6 ロータケース
 7 リング状ラバーマグネット
 8 メディア載置部
 8a 立ち上げ部
 8b 成型用金型挿入口
 8c メディアチャック用バネ部
1 Stator base
1a Bridge 1b Brace Piece 2 Circuit Board 3 Shaft Holder
4 stator 4a salient pole 4b armature coil
5 shaft 6 rotor case 7 ring-shaped rubber magnet 8 media placing portion 8a rising portion 8b molding die insertion opening 8c media chuck spring portion

Claims (3)

 ロータケース(6)の上側にターンテーブルを構成するものでメディアディスクをセンタリングする樹脂製の立ち上げ部(8a)が該ロータケースに一体に形成され、前記ロータケースの内側に配したマグネットと、前記ロータケースに圧入された軸とからなるロータを備え、さらに、前記ロータに前記立ち上げ部の外周の位置で成形用金型挿入口が設けられ、この成形用金型挿入口(8b)を介してメディアを保持する少なくとも1個のメディアチャック用バネ部(8c)が前記立ち上げ部(8a)と一体に同樹脂で形成されたことを特徴とするスピンドルモータ用ターンテーブル。 A rising portion (8a) made of a resin for forming a turntable on the upper side of the rotor case (6) and centering a media disk is formed integrally with the rotor case, and a magnet disposed inside the rotor case; A rotor having a shaft press-fitted into the rotor case; and a rotor provided with a molding die insertion port at an outer peripheral position of the rising portion. A turntable for a spindle motor, wherein at least one spring portion (8c) for a media chuck for holding a medium via the same resin as the rising portion (8a).  前記ロータケース上面に少なくともメディア載置部(8)が弾力性のある樹脂で該ロータケースに一体に形成されている請求項1に記載のスピンドルモータ用ターンテーブル。 2. The turntable for a spindle motor according to claim 1, wherein at least a media mounting portion (8) is formed integrally with the rotor case on the upper surface of the rotor case with an elastic resin.  立ち上げ部(8a)とメディア載置部(8)は一体に形成された請求項1又は2に記載のスピンドルモータ用ターンテーブル。 3. The turntable for a spindle motor according to claim 1, wherein the rising portion (8a) and the media mounting portion (8) are formed integrally.
JP2003406781A 2003-12-05 2003-12-05 Turntable for spindle motor Pending JP2004146056A (en)

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Application Number Priority Date Filing Date Title
JP2003406781A JP2004146056A (en) 2003-12-05 2003-12-05 Turntable for spindle motor

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Application Number Priority Date Filing Date Title
JP2003406781A JP2004146056A (en) 2003-12-05 2003-12-05 Turntable for spindle motor

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP25894998A Division JP3530037B2 (en) 1998-09-11 1998-09-11 Brushless motor with resin turntable

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Publication Number Publication Date
JP2004146056A true JP2004146056A (en) 2004-05-20

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010282709A (en) * 2009-06-08 2010-12-16 Nippon Densan Corp Turntable and method for manufacturing turntable
JP2011018429A (en) * 2009-06-08 2011-01-27 Nippon Densan Corp Turntable and method of manufacturing turntable
KR101084771B1 (en) * 2009-10-13 2011-11-21 삼성전기주식회사 A spindle motor
KR101120292B1 (en) * 2009-06-08 2012-03-06 니혼 덴산 가부시키가이샤 Turntable and method for manufacturing the same
CN103329203A (en) * 2011-01-05 2013-09-25 株式会社三弘社 Spindle motor
US8719852B2 (en) 2009-08-07 2014-05-06 Nidec Corporation Turntable for storage disk drive apparatus, a motor including the turntable, a storage disk drive apparatus including the turntable, and a method for manufacturing the turntable
US9856880B2 (en) 2014-05-07 2018-01-02 Nidec Corporation Motor and blower
US10054126B2 (en) 2014-05-07 2018-08-21 Nidec Corporation Casing and blower

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8341658B2 (en) 2009-06-08 2012-12-25 Nidec Corporation Turntable for a storage disk drive apparatus, a motor using the turntable, a storage disk drive apparatus using the same
JP2011018429A (en) * 2009-06-08 2011-01-27 Nippon Densan Corp Turntable and method of manufacturing turntable
JP4683350B2 (en) * 2009-06-08 2011-05-18 日本電産株式会社 Turntable and method for manufacturing turntable
JP4683347B2 (en) * 2009-06-08 2011-05-18 日本電産株式会社 Turntable and method for manufacturing turntable
KR101120292B1 (en) * 2009-06-08 2012-03-06 니혼 덴산 가부시키가이샤 Turntable and method for manufacturing the same
JP2010282709A (en) * 2009-06-08 2010-12-16 Nippon Densan Corp Turntable and method for manufacturing turntable
US8438588B2 (en) 2009-06-08 2013-05-07 Nidec Corporation Turntable for a storage disk apparatus including ferromagnetic material and a resin member
US8719852B2 (en) 2009-08-07 2014-05-06 Nidec Corporation Turntable for storage disk drive apparatus, a motor including the turntable, a storage disk drive apparatus including the turntable, and a method for manufacturing the turntable
KR101084771B1 (en) * 2009-10-13 2011-11-21 삼성전기주식회사 A spindle motor
CN103329203A (en) * 2011-01-05 2013-09-25 株式会社三弘社 Spindle motor
CN103329203B (en) * 2011-01-05 2015-09-23 株式会社三弘社 spindle motor
US9856880B2 (en) 2014-05-07 2018-01-02 Nidec Corporation Motor and blower
US10054126B2 (en) 2014-05-07 2018-08-21 Nidec Corporation Casing and blower

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