JPH04168666A - Rotary machine for recording medium drive use - Google Patents
Rotary machine for recording medium drive useInfo
- Publication number
- JPH04168666A JPH04168666A JP29657790A JP29657790A JPH04168666A JP H04168666 A JPH04168666 A JP H04168666A JP 29657790 A JP29657790 A JP 29657790A JP 29657790 A JP29657790 A JP 29657790A JP H04168666 A JPH04168666 A JP H04168666A
- Authority
- JP
- Japan
- Prior art keywords
- rotor hub
- rotating machine
- outside
- screw hole
- cylindrical part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004381 surface treatment Methods 0.000 claims description 9
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 claims description 4
- 230000003749 cleanliness Effects 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 8
- 238000007747 plating Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000005291 magnetic effect Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011553 magnetic fluid Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Rotational Drive Of Disk (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、ハードディスク駆動用スピンドルモータのよ
うに記録媒体を回転子ハブの外周部に保持させて駆動す
るための記録媒体駆動用回転機に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotating machine for driving a recording medium, such as a spindle motor for driving a hard disk, for driving a recording medium while holding it on the outer periphery of a rotor hub. .
［従来の技術及び発明が解決しようとする課題］記録媒
体を回転子ハブの外周部に保持させて駆動するための記
録媒体駆動用回転機としては、従来例えば、第４図に示
されるようなハードディスク装置に組み込まれるハード
ディスク駆動用スピンドルモータがある。[Prior Art and Problems to be Solved by the Invention] Conventionally, as a recording medium driving rotating machine for holding and driving a recording medium on the outer periphery of a rotor hub, for example, a rotating machine as shown in FIG. 4 has been used. There is a spindle motor for driving a hard disk that is built into a hard disk drive.
近時におけるハードディスク装置では、小型大容量化の
一層の進展に伴い、ハードディスク面に対する磁気ヘッ
ドの浮上量はサブミクロンオーダーとなっている。この
ようなハードディスク装置のディスク室内に粉塵やオイ
ル微粒子が飛散するするとハードディスク面や磁気ヘッ
ドを損傷させるおそれがあるので、それを防ぐために、
ディスク室におけるスピンドルモータ外部の空間を清浄
に保つ必要がある。In recent hard disk drives, the flying height of the magnetic head relative to the hard disk surface has become on the order of submicrons, as the size and capacity of hard disk drives have become more compact. If dust or oil particles are scattered inside the disk chamber of such a hard disk drive, there is a risk of damaging the hard disk surface or magnetic head, so to prevent this,
It is necessary to keep the space outside the spindle motor in the disk chamber clean.
そのための方策の一つとして、回転子ハブにハードディ
スクを固定するためにその回転子ハブａにモータ外部か
ら穿設されたねじ孔すに防錆処理などの表面処理を施し
、以てそのねじ孔すから錆粉が飛散したりするような不
都合が発生することを防いでいる。One of the measures for this purpose is to apply surface treatment such as anti-rust treatment to the screw holes drilled from the outside of the motor in the rotor hub a in order to fix the hard disk to the rotor hub. This prevents inconveniences such as rust particles from scattering.
ところが、表面処理の際にねじ孔すの奥端部が閉塞して
いると、表面処理をねじ孔すの全体に亙って確実に行う
のは容易ではない。However, if the inner end of the screw hole is blocked during surface treatment, it is not easy to reliably perform surface treatment over the entire screw hole.
そこで、表面処理を容易・確実に行うために、第４図に
示されるようにねじ孔すをモータ内部に貫通させると共
に、それによってモータ内部のオイル微粒子や粉塵等が
モータ外部へねじ孔すを通じて導出されるのを防ぐため
に、ねじ孔すのスピンドルモータ内部Ｃへの開口部にシ
ールｄを施しているのであるが、オイル微粒子等に対す
るシールの完全性は必ずしも期し難い場合がある。Therefore, in order to easily and reliably perform surface treatment, screw holes are made to penetrate inside the motor as shown in Figure 4, and this allows oil particles and dust inside the motor to pass through the screw holes to the outside of the motor. In order to prevent oil particles from being drawn out, a seal d is applied to the opening of the screw hole into the spindle motor interior C, but it may not always be possible to ensure the integrity of the seal against oil particles and the like.
本発明は、従来技術に存した上記のような問題声に鑑み
行われたものであって、その目的とするところは１回転
機外部の空間の清浄性を効果的に保つことができる記録
媒体駆動用回転機を提供することにある。The present invention was made in view of the above-mentioned problems existing in the prior art, and its purpose is to provide a recording medium that can effectively maintain the cleanliness of the space outside the single-rotation machine. The purpose of the present invention is to provide a driving rotating machine.
［課題を解決するための手段］
上記目的を達成するために、本発明記録媒体駆動用回転
機は、回転機の内外を隔てる回転子ハブを有する回転機
であって、
前記回転子ハブが、記録媒体を外周部に嵌合させて保持
するための保持用筒状部と、その保持用筒状部の一端側
にて外方に張り出した張出部を有し、回転子ハブにおけ
る保持用筒状部の他端側は、保持用筒状部よりも外方に
は実質上張り出さないよう構成されると共に、前記回転
子ハブに設けられたねじ孔のうち入り口が回転機の外部
に開口するものの奥端部が、前記回転子ハブにおける回
転機の外部側に設けられた凹部に開口し、前記奥端部と
凹部とから構成される連通部がシール材によりシールさ
れ、而も前記ねじ孔は、回転機の内部には達せず且つ防
錆処理などの表面処理が施されたものとしている。[Means for Solving the Problems] In order to achieve the above object, a rotating machine for driving a recording medium of the present invention is a rotating machine having a rotor hub that separates the inside and outside of the rotating machine, the rotor hub comprising: It has a holding cylindrical part for fitting and holding the recording medium on the outer periphery, and a protruding part projecting outward at one end of the holding cylindrical part, and is used for holding in the rotor hub. The other end of the cylindrical part is configured so as not to substantially protrude outward beyond the holding cylindrical part, and the entrance of the screw hole provided in the rotor hub is located outside the rotating machine. A rear end of the opening opens into a recess provided on the outside of the rotating machine in the rotor hub, and a communication portion constituted by the rear end and the recess is sealed with a sealing material, and the The screw holes do not reach the inside of the rotating machine and are subjected to surface treatment such as rust prevention treatment.
［作用］
回転子ハブは保持用筒状部の一端側にて外方に張り出し
た張出部を有し、保持用筒状部の他端側は、その保持用
筒状部よりも外方には実質上張り出さないよう構成され
ているので、記録媒体を回転子ハブにおける当該他端側
から保持用筒状部に外嵌してその外周部に保持させるこ
とができる。[Function] The rotor hub has an outwardly projecting part on one end side of the holding cylindrical part, and the other end side of the holding cylindrical part extends outward from the holding cylindrical part. Since the recording medium is configured not to substantially protrude, the recording medium can be fitted onto the holding cylindrical portion from the other end side of the rotor hub and held on the outer peripheral portion thereof.
回転子ハブに設けられたねじ孔のうち入り口が回転機の
外部に開口するものは、その奥端部が前記回転子ハブに
おける回転機の外部側に設けられた凹部に開口すること
により貫通しているので、当該ねじ孔の全体に亙る表面
処理を確実且つ容易に行うことが可能となる。そのため
、その表面処理の効果すなわち防錆効果等の確実性が高
くなり、回転機の外部への錆粉の飛散等の不都合が効果
的に防がれる。Among the screw holes provided in the rotor hub, those whose entrances open to the outside of the rotating machine are penetrated by having their rear ends open into recesses provided on the outside of the rotating machine in the rotor hub. Therefore, it is possible to reliably and easily perform surface treatment over the entire screw hole. Therefore, the effectiveness of the surface treatment, that is, the rust prevention effect, is more reliable, and inconveniences such as scattering of rust powder to the outside of the rotating machine are effectively prevented.
また前記ねじ孔は回転機の内部に達しないので、ねじ孔
を通じて回転機内部のオイル微粒子や粉塵等が回転機外
部に導出されることが防がれる。Further, since the screw hole does not reach the inside of the rotating machine, oil particles, dust, etc. inside the rotating machine are prevented from being led out to the outside of the rotating machine through the screw hole.
更に、前記ねじ孔の奥端部と回転子ハブにおける回転機
の外部側に設けられた凹部とから構成される連通部がシ
ール材によりシールされているので、ねじ孔の入り口か
ら奥端部に向かってねじを螺入したとしても、それによ
る回転機の外部への切り粉等の排出は防止される。Furthermore, since the communicating portion consisting of the inner end of the screw hole and the recess provided on the outside of the rotating machine in the rotor hub is sealed with a sealing material, there is no flow from the entrance of the screw hole to the inner end. Even if the screw is inserted in the opposite direction, chips, etc., are prevented from being discharged to the outside of the rotating machine.
［実施例］
本発明の実施例を、第１図乃至第３図を参照しつつ説明
する。[Example] An example of the present invention will be described with reference to FIGS. 1 to 3.
第１図乃至第３図は、何れも本発明記録媒体駆動用回転
機の１実施例としてのハードディスク駆動用のブラシレ
ススピンドルモータに関するものであり、そのうち第１
図はスピンドルモータの破砕断面図、第２図はその平面
図、第３図は、記録媒体の一例であるハードディスクを
保持させた状態のスピンドルモータの破砕断面図である
。FIGS. 1 to 3 all relate to a brushless spindle motor for driving a hard disk as an embodiment of a rotating machine for driving a recording medium of the present invention.
2 is a plan view of the spindle motor, and FIG. 3 is a fragmented sectional view of the spindle motor holding a hard disk, which is an example of a recording medium.
１０は強磁性材料製の固定軸である。図面における固定
軸ｌＯの上端部内には、ハードディスク装置のディスク
室１２の蓋板１４にねじ止めするだめのねじ孔１６が設
けられており、固定軸１０の下端部外周部は、ディスク
室１２の基板１８に穿設されたねじ孔にねじ込んで固定
するためのねじ部２０に構成されている。２２は、固定
軸１０の下端部外方とモータ内部２４とを連通してリー
ド線２６を導出するための連通孔である。10 is a fixed shaft made of ferromagnetic material. A screw hole 16 for screwing into the cover plate 14 of the disk chamber 12 of the hard disk drive is provided in the upper end of the fixed shaft IO in the drawing, and the outer periphery of the lower end of the fixed shaft 10 is provided in the upper end of the fixed shaft 10. The screw portion 20 is configured to be screwed into a screw hole drilled in the substrate 18 for fixation. Reference numeral 22 denotes a communication hole through which the outside of the lower end of the fixed shaft 10 and the inside of the motor 24 are connected to each other and the lead wire 26 is led out.
２８及び３０は玉軸受である。各玉軸受２８及び３０の
内輪は固定軸１０に固定されている。上玉軸受２８の外
輪はロータハブ３２（回転子ハブ）の、図面における上
端部内周面に固定されており、その上方に磁性流体シー
ル３４が施されている。一方下玉軸受３０の外輪とロー
タハブ３２の下端部内周面との間には、ブツシュ３６が
固定されており、その下方にも磁性流体シール３８が施
されている。28 and 30 are ball bearings. The inner ring of each ball bearing 28 and 30 is fixed to the fixed shaft 10. The outer ring of the upper ball bearing 28 is fixed to the inner peripheral surface of the upper end of a rotor hub 32 (rotor hub) in the drawing, and a magnetic fluid seal 34 is provided above the outer ring. On the other hand, a bushing 36 is fixed between the outer ring of the lower ball bearing 30 and the inner peripheral surface of the lower end of the rotor hub 32, and a magnetic fluid seal 38 is also provided below the bushing 36.
４０は、固定軸１０に固定されたステータコア、４２は
、そのステータコア４０に捲回されたステータコイルで
ある。また４４は、ロータハブ３２の内周壁に固定され
たロータマグネットであって、径方向ギャップを隔有し
てステータコア４０に相対している。40 is a stator core fixed to the fixed shaft 10, and 42 is a stator coil wound around the stator core 40. Further, 44 is a rotor magnet fixed to the inner circumferential wall of the rotor hub 32, and faces the stator core 40 with a radial gap therebetween.
４６は、固定軸１０に固定された回路基板である。４８
は、ロータマグネット４４の磁極位置を検出するための
ホールセンサであって、回路基板４６に設けられている
。46 is a circuit board fixed to the fixed shaft 10. 48
is a Hall sensor for detecting the magnetic pole position of the rotor magnet 44, and is provided on the circuit board 46.
ロータハブ３２は、ハードディスク５０を外周部に嵌合
させて保持するための鉄系材料製の保持用筒状部３２ａ
と、その保持用筒状部３２ａの図面における下端部にて
外方に張り出した張出部３２ｂを有している。５２は、
張出部３２ｂの外周部を構成するアルミニウム製環状部
材である。ロータハブ３２における保持用筒状部３２ａ
の上端側は、保持用筒状部３２ａよりも外方には実質上
張り出さないよう構成されている。The rotor hub 32 has a holding cylindrical part 32a made of iron-based material that fits and holds the hard disk 50 on its outer circumference.
The holding cylindrical portion 32a has an outwardly projecting protruding portion 32b at its lower end in the drawing. 52 is
This is an annular member made of aluminum that constitutes the outer peripheral portion of the overhang portion 32b. Holding cylindrical portion 32a in rotor hub 32
The upper end side is configured not to substantially protrude outward beyond the holding cylindrical portion 32a.
５４は、ハードディスク固定用のクランプ部材５６をね
じ止めするためにロータハブ３２に設けられたねじ孔で
ある。このねじ孔５４は、ロータハブ３２の上端部にお
けるモータ外部の環状面３２ｃを入り口として回転軸線
方向に平行に設けられているが、モータ内部２４には達
していない。54 is a screw hole provided in the rotor hub 32 for screwing a clamp member 56 for fixing the hard disk. This screw hole 54 is provided parallel to the rotational axis direction with an entrance at the annular surface 32c outside the motor at the upper end of the rotor hub 32, but does not reach the inside 24 of the motor.
５８は、保持用筒状部３２ａの外周部に設けられたＵ字
状又はＶ字状断面の環状溝（凹部）である。但し凹部を
この実施例の環状溝５８のように連続状に形成すること
は、必ずしも要しない。Reference numeral 58 denotes an annular groove (recess) with a U-shaped or V-shaped cross section provided on the outer circumference of the holding cylindrical portion 32a. However, it is not always necessary to form the concave portion continuously like the annular groove 58 in this embodiment.
ねじ孔５４の奥端部５４ａは環状溝５８に開口しており
、このねじ孔５４を含むロータハブ３２の全表面がニッ
ケルメッキ処理されている。メツキ処理には電気メツキ
等の各種メツキ法を用いることができるが、ねじ孔５４
や環状溝５８の全表面に亙って確実にメツキを施す上で
、無電極メツキが好ましい。A rear end 54a of the screw hole 54 opens into an annular groove 58, and the entire surface of the rotor hub 32, including the screw hole 54, is nickel plated. Various plating methods such as electric plating can be used for the plating process, but the screw hole 54
Electrodeless plating is preferred in order to ensure that the entire surface of the annular groove 58 is plated.
６０は、シール材の一例であるゴム製のＯリングである
。このＯリング６０が環状溝５８内に嵌込まれることに
より、ねじ孔５４の奥端部５４ａと環状溝５８とから構
成される連通部がシールされている。60 is a rubber O-ring which is an example of a sealing material. By fitting this O-ring 60 into the annular groove 58, the communication portion formed by the inner end 54a of the screw hole 54 and the annular groove 58 is sealed.
第３図において、６１は環状のスペーサ、６２はねじ、
６４はシムである。In FIG. 3, 61 is an annular spacer, 62 is a screw,
64 is a shim.
シム６４は、ポリテトラフルオロエチレン樹脂テープか
らなり、保持用筒状部３２ａの外周面上に、回転軸線に
平行に６０度中心角毎に設けられている。ハードディス
ク５０は１図面における上端側から保持用筒状部３２ａ
の外周部に外嵌され、各ハードディスク５０の間に介在
するスペーサ６１と、ねじ６２によってロータハブ３２
にねじ止めされたクランプ部材５６とによって、ロータ
ハブ３２に対し固定されている。保持用筒状部３２ａの
材料とハードディスク５０の主材料たるアルミニウムと
の熱による膨張率が大きく異なるが、それらの間にシム
６４が介在しているので、温度変化によるハードディス
ク５０のがたつきや変形が防止される。The shims 64 are made of polytetrafluoroethylene resin tape, and are provided on the outer circumferential surface of the holding cylindrical portion 32a at central angles of 60 degrees parallel to the rotational axis. The hard disk 50 has a holding cylindrical portion 32a from the upper end side in one drawing.
The rotor hub 32 is connected to the rotor hub 32 by a spacer 61 that is fitted on the outer periphery of the hard disk drive and interposed between each hard disk 50, and a screw 62.
It is fixed to the rotor hub 32 by a clamp member 56 screwed to the rotor hub 32. Although the thermal expansion coefficients of the material of the holding cylindrical portion 32a and aluminum, which is the main material of the hard disk 50, are significantly different, the shim 64 interposed between them prevents the hard disk 50 from wobbling due to temperature changes. Deformation is prevented.
ねじ孔５４は、その奥端部５４ａが環状溝５８に開口す
ることにより貫通しているので、ねじ孔５４の全体に亙
るメツキ処理を確実且つ容易に行うことが可能となる。Since the screw hole 54 penetrates through the annular groove 58 by opening its inner end 54a, it becomes possible to reliably and easily perform the plating process over the entire screw hole 54.
そのため、そめメツキ処理の効果すなわち防錆効果等の
確実性が高くなり、モータ外部のディスク室１２内への
鋼粉の飛散等の不都合が効果的に防がれる。Therefore, the effectiveness of the plating treatment, that is, the rust prevention effect, etc. is more reliable, and disadvantages such as scattering of steel powder into the disk chamber 12 outside the motor are effectively prevented.
またねじ孔５４はモータ内部２４に達しないので、ねじ
孔５４を通じてモータ内部２４のオイル微粒子や粉塵等
が外部のディスク室１２内に導出されることが防がれる
。Further, since the screw hole 54 does not reach the inside of the motor 24, oil particles, dust, etc. inside the motor inside 24 are prevented from being led out into the external disk chamber 12 through the screw hole 54.
更に、ねじ孔５４の奥端部５４ａと環状溝５８とから構
成される連通部がＯリング６０によりシールされている
ので、クランプ部材５６固定のためにねじ孔５４の入り
口から奥端部５４ａに向かってねじ６２を螺入すること
によるディスク室１２内への切り粉等の排出が防止され
る。Furthermore, since the communication portion consisting of the inner end 54a of the screw hole 54 and the annular groove 58 is sealed by the O-ring 60, a connection can be made from the entrance of the screw hole 54 to the inner end 54a in order to fix the clamp member 56. By screwing in the screw 62 toward the disk chamber 12, chips and the like are prevented from being discharged into the disk chamber 12.
「発明の効果］
本発明の記録媒体駆動用回転機では、回転子ハブに設け
られたねじ孔のうち入り口が回転機の外部に開口するも
のが、回転機の内部に達しないで連通部を介して外部に
貫通しており、而もその連通部がシールされているので
、ねじ孔の全体に亙る表面処理効果の確実性が高くなっ
て回転機の外部への鋼粉の飛散等の不都合が効果的に防
がれ、回転機内部のオイル微粒子や粉塵等の回転機外部
へのねじ孔を通ずる導出が防がれ、ねじ孔へのねじの螺
入による回転機の外部への切り粉等の排出が防止される
など、回転機外部の空間の清浄性を保つ上で優れた効果
を発揮する。従って、例えばハードディスク装置におけ
る密閉されたディスク室内において記録媒体たるハード
ディスクを回転子ハブにおける保持用筒状部の外周部に
保持させて駆動する場合のように、回転機外部の空間の
清浄性を保つ必要がある場合における使用に最適である
。"Effects of the Invention" In the rotating machine for driving a recording medium of the present invention, among the screw holes provided in the rotor hub, the screw holes whose entrances open to the outside of the rotating machine do not reach the inside of the rotating machine and form a communication section. Since the communication part is sealed, the surface treatment effect over the entire screw hole is more reliable, and there is no problem such as scattering of steel powder to the outside of the rotating machine. This effectively prevents oil particles and dust inside the rotating machine from being drawn out through the screw holes, and prevents chips from entering the outside of the rotating machine due to screws being screwed into the screw holes. This has an excellent effect in maintaining the cleanliness of the space outside the rotating machine, such as preventing the discharge of . It is most suitable for use when it is necessary to maintain the cleanliness of the space outside the rotating machine, such as when the rotating machine is driven by being held on the outer periphery of the cylindrical part.
第１図乃至第３図は、何れも本発明記録媒体駆動用回転
機の１実施例としてのハードディスク駆動用のブラシレ
ススピンドルモータに関するものであり、そのうち第１
図はスピンドルモータの破砕断面図、第２図はその平面
図、第３図は、ハードディスクを保持させた状態のスピ
ンドルモータの破砕断面図である。
第４図は、従来のハードディスク駆動用スピンドルモー
タの破砕断面図である。
図面中、３２はロータハブ、３２ａは保持用筒状部、３
２ｂは張出部、５０はハードディスク、５４はねじ孔、
５４ａは奥端部、５８は環状溝である。FIGS. 1 to 3 all relate to a brushless spindle motor for driving a hard disk as an embodiment of a rotating machine for driving a recording medium of the present invention.
The figure is a broken sectional view of the spindle motor, FIG. 2 is a plan view thereof, and FIG. 3 is a broken sectional view of the spindle motor in a state in which a hard disk is held. FIG. 4 is a fragmented sectional view of a conventional spindle motor for driving a hard disk. In the drawing, 32 is a rotor hub, 32a is a holding cylindrical part, 3
2b is an overhang, 50 is a hard disk, 54 is a screw hole,
54a is a rear end portion, and 58 is an annular groove.
Claims (1)
て、 前記回転子ハブが、記録媒体を外周部に嵌合させて保持
するための保持用筒状部と、その保持用筒状部の一端側
にて外方に張り出した張出部を有し、回転子ハブにおけ
る保持用筒状部の他端側は、保持用筒状部よりも外方に
は実質上張り出さないよう構成されると共に、前記回転
子ハブに設けられたねじ孔のうち入り口が回転機の外部
に開口するものの奥端部が、前記回転子ハブにおける回
転機の外部側に設けられた凹部に開口し、前記奥端部と
凹部とから構成される連通部がシール材によりシールさ
れ、而も前記ねじ孔は、回転機の内部には達せず且つ防
錆処理などの表面処理が施されていることを特徴とする
記録媒体駆動用回転機。[Scope of Claims] A rotating machine having a rotor hub that separates the inside and outside of the rotating machine, wherein the rotor hub includes a holding cylindrical part for fitting and holding a recording medium on an outer circumferential part; One end of the holding cylindrical part has an outwardly protruding part, and the other end of the holding cylindrical part in the rotor hub is substantially outward from the holding cylindrical part. The screw hole provided in the rotor hub has an entrance opening to the outside of the rotating machine, and a rear end portion of the screw hole provided in the rotor hub is provided on the outside of the rotating machine in the rotor hub. The threaded hole opens into the recessed part, and the communication part made up of the inner end part and the recessed part is sealed with a sealing material, and the screw hole does not reach the inside of the rotating machine and is not subjected to surface treatment such as rust prevention treatment. A rotating machine for driving a recording medium, characterized in that:
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2296577A JP3030717B2 (en) | 1990-10-31 | 1990-10-31 | Rotating machine for driving recording media |
| US07/780,145 US5216304A (en) | 1990-10-20 | 1991-10-21 | Spindle motor with an improved hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2296577A JP3030717B2 (en) | 1990-10-31 | 1990-10-31 | Rotating machine for driving recording media |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04168666A true JPH04168666A (en) | 1992-06-16 |
| JP3030717B2 JP3030717B2 (en) | 2000-04-10 |
Family
ID=17835346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2296577A Expired - Fee Related JP3030717B2 (en) | 1990-10-20 | 1990-10-31 | Rotating machine for driving recording media |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3030717B2 (en) |
-
1990
- 1990-10-31 JP JP2296577A patent/JP3030717B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3030717B2 (en) | 2000-04-10 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |