JPS61269117A - Device for supporting rotary body - Google Patents
Device for supporting rotary bodyInfo
- Publication number
- JPS61269117A JPS61269117A JP11156785A JP11156785A JPS61269117A JP S61269117 A JPS61269117 A JP S61269117A JP 11156785 A JP11156785 A JP 11156785A JP 11156785 A JP11156785 A JP 11156785A JP S61269117 A JPS61269117 A JP S61269117A
- Authority
- JP
- Japan
- Prior art keywords
- rotating
- support device
- body support
- attraction
- fixed
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/47—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light
- B41J2/471—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light using dot sequential main scanning by means of a light deflector, e.g. a rotating polygonal mirror
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の技術分野］
本発咀は回転多面体技光偏向器のように高速度で回転す
る回転体の支持に好適する回転体支持装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a rotating body support device suitable for supporting a rotating body that rotates at high speed, such as a rotating polyhedral optical deflector.
［発明の技術的背景］
近年、各種産業分野においては、伝達や記録を必要とす
る情報量が著しく増大してきている。これに伴って、情
報記録機器の一種であるプリンタも高速化が急激に進展
し、最近では毎分１万行以上の高速印字が可能なレーザ
プリンタが実現している。[Technical Background of the Invention] In recent years, the amount of information that needs to be transmitted and recorded has increased significantly in various industrial fields. Along with this, the speed of printers, which are a type of information recording equipment, has rapidly increased, and recently, laser printers capable of high-speed printing of 10,000 lines per minute or more have been realized.
レーザプリンタは第８図に示すように、レーザ光源１と
、このレーザ光源から発せられたレーザビーム２を偏向
させる回転多面体鏡装置３と、偏向されレーザビ−ムを
結像する結像レンズユニット（ｆ−θレンズ）４と、こ
のレンズユニットを通ったレーザビームによってスキャ
ンニングされる感光体５とを備えており、予め一様に帯
電させた感光体５を、高速回転する回転多面体技芸４３
によって偏向させたレーザビーム２でスキャンニングす
ることにより、感光体５上に静電潜像を形成させ、これ
を電子写真方式で用紙上に印刷するようにしている。As shown in FIG. 8, the laser printer includes a laser light source 1, a rotating polygon mirror device 3 that deflects a laser beam 2 emitted from the laser light source, and an imaging lens unit (that forms an image of the deflected laser beam). A rotating polyhedron technique 43 that rotates the photoreceptor 5 uniformly charged in advance at high speed, is equipped with an f-theta lens) 4 and a photoreceptor 5 that is scanned by a laser beam passing through this lens unit.
An electrostatic latent image is formed on the photoreceptor 5 by scanning with a laser beam 2 deflected by the laser beam 2, and this is printed on paper using an electrophotographic method.
第９図は上述の回転多面体技芸＠３の具体的構成例を示
している。同図において、固定軸１０の下端取付は部１
０ａは、モーターケーシング１１に透設した取付孔に嵌
挿され、固定されている。FIG. 9 shows a specific example of the configuration of the above-mentioned rotating polyhedron technique @3. In the figure, the lower end of the fixed shaft 10 is attached to part 1.
0a is fitted and fixed into a mounting hole provided through the motor casing 11.
固定軸１０の下端および上端よりやや内側には上下端に
ヘリンボーン溝を刻設したジャーナル部＋ １２
８．１２ｂが形成されている。なお、各ヘリンボーン溝
は矢印状先端が、後述する回転組立体の回転方向を向く
よう、対となって刻設されており、動圧空気ジャーナル
軸受を形成している。Slightly inside the lower and upper ends of the fixed shaft 10 are journal parts + 12 with herringbone grooves carved on the upper and lower ends.
8.12b is formed. The herringbone grooves are carved in pairs so that the arrow-shaped tips thereof face the rotational direction of the rotating assembly, which will be described later, to form a hydrodynamic air journal bearing.
固定軸１０には、ジャーナル部１２ａ、１２ｂに対して
３μｍ−７μｍ程度のクリアランスをもって中空円筒状
゛のシリンダ１３が遊嵌されている。A hollow cylindrical cylinder 13 is loosely fitted onto the fixed shaft 10 with a clearance of about 3 μm to 7 μm with respect to the journal portions 12a and 12b.
このシリンダには多面体技１４が一体的に形成されてお
り、またモーターマグネットロータ１５およびスラスト
荷重支持用磁気軸受の内側（回転側）磁気リング１６ａ
が嵌合接着され、回転組立体２０を構成している。また
、モーターケーシング１１内にＧ、１．内側磁気リング
１６ｂに対向して外側（固定側）磁気リング１６ｂが設
置されている。A polyhedron 14 is integrally formed in this cylinder, and a magnetic ring 16a on the inner side (rotation side) of the motor magnet rotor 15 and the magnetic bearing for supporting thrust load.
are fitted and bonded together to form a rotating assembly 20. Moreover, G, 1. in the motor casing 11. An outer (fixed side) magnetic ring 16b is installed opposite the inner magnetic ring 16b.
モーターマグネットロータ１５の外側には適度の間隔を
おいて、駆動コイル２１とモーターステーター２２が配
置され駆動機構部２３を構成している。この駆動機構部
には、モータ駆動用回路基板２４を通して電力が入力さ
れ、回転組立体２０を高速回転させる。A drive coil 21 and a motor stator 22 are arranged on the outside of the motor magnet rotor 15 at an appropriate interval to form a drive mechanism section 23. Electric power is input to this drive mechanism section through the motor drive circuit board 24 to rotate the rotating assembly 20 at high speed.
なお、モーターケーシング１１には多面体技１４の外側
位置にレーザビームを通過させる窓〈図示せず）が形成
されている。Note that a window (not shown) is formed in the motor casing 11 at a position outside the polyhedron 14 to allow the laser beam to pass therethrough.
２５．２６は回転組立体２０がスラスト方向に移動した
際の衝撃を吸収する緩衝部材を示す。Reference numerals 25 and 26 indicate buffer members that absorb shock when the rotating assembly 20 moves in the thrust direction.
上述のように構成した回転体支持装置において、モータ
ー駆動用回路基板２４を通して駆動コイル２１に電力を
供給すると、モーターマグネットロータ１５に回転力が
発生し、回転組立体２０は回転する。In the rotating body support device configured as described above, when power is supplied to the drive coil 21 through the motor drive circuit board 24, a rotational force is generated in the motor magnet rotor 15, and the rotation assembly 20 rotates.
回転組立体２０は前述のようにヘリンボーン溝型の動圧
空気ジャーナル軸受によって３μｍ−７μｍ程度の微小
間隙をおいて軸支されているので、回転組立体２０の回
転が始まると、ヘリンボーン溝を通して上記微小間隙に
吸込まれる空気流によって軸受中央部での圧力が高くな
り、この圧力分布によってラジアル方向の力がシリンダ
１３の内面に作用する。As mentioned above, the rotating assembly 20 is supported by a herringbone groove-type hydrodynamic air journal bearing with a minute gap of about 3 μm to 7 μm, so when the rotating assembly 20 starts rotating, the above-mentioned air journal bearing passes through the herringbone groove. The pressure at the center of the bearing increases due to the air flow sucked into the minute gap, and a radial force acts on the inner surface of the cylinder 13 due to this pressure distribution.
一方、回転組立体２０は、その下端部に固着した内側磁
気リング１６ａとモーターケーシング１１側に固着した
外側磁気リング１６ｂとの吸引力により、スラスト荷重
と釣合った状態に保たれるので、回転組立体２０が回り
はじめ、動圧空気ジャーナル軸受の圧力が高まると、シ
リンダ１３は固定軸１０のジャーナル部１２ａ、１２ｂ
に対して完全な非接触状態となり、高速回転に移行する
。On the other hand, the rotating assembly 20 is maintained in a state balanced with the thrust load by the attraction force between the inner magnetic ring 16a fixed to its lower end and the outer magnetic ring 16b fixed to the motor casing 11 side, so that the rotating assembly 20 rotates. When the assembly 20 begins to rotate and the pressure in the hydrodynamic air journal bearing increases, the cylinder 13 will move towards the journal portions 12a, 12b of the fixed shaft 10.
The motor becomes completely non-contact with the motor and moves to high-speed rotation.
［背景技術の問題点１
しかしながら、上述のようにラジアル方向は動圧空気゛
軸受によって、またスラスト方向は磁気スラスト軸受に
よって保持した回転体支持装置においては、回転組立体
のスラスト荷重は磁気スラスト軸受の磁力のみによって
支えられているため、回転組立１体のスラスト方向の移
動は比較的容易であり、例えば装置の搬送時に過大な力
が加わると回転組立体がスラスト方向に移動し、高精度
に加工・組立された多面体技や軸受部に損傷を与えるお
それがある。[Problem in the Background Art 1] However, in the rotating body support device which is supported in the radial direction by a hydrodynamic air bearing and in the thrust direction by a magnetic thrust bearing as described above, the thrust load of the rotating assembly is supported by the magnetic thrust bearing. Because it is supported only by the magnetic force of There is a risk of damaging the processed and assembled polyhedrons and bearings.
前述の緩衝部材２５．２６は回転組立体２０に加わる衝
撃力を緩和するため設けられたものであるが、回転組立
体２０が移動し、その端面が緩衝部材２５．２６に接触
すると、これらの接解部は高精度の平滑度に仕上げられ
ているため、互いに吸着し、第１０図に示すように離れ
なくなり、回転不能に陥るという欠点があった。The aforementioned buffer members 25 and 26 are provided to alleviate the impact force applied to the rotating assembly 20, but when the rotating assembly 20 moves and its end surface comes into contact with the buffer members 25 and 26, these Since the welding parts are finished with high precision smoothness, they have the disadvantage that they stick to each other and cannot be separated as shown in FIG. 10, making it impossible to rotate.
［発明の目的］
本発明は背景技術における上述の如き欠点を除去すべく
なされたもので、回転組立体と固定側との吸着を防止し
、安定した回転を可能にした回転体支持装置を提供する
ことを目的とするものである。[Object of the Invention] The present invention has been made in order to eliminate the above-mentioned drawbacks in the background art, and provides a rotating body support device that prevents adhesion between the rotating assembly and the stationary side and enables stable rotation. The purpose is to
［発明の概要］
本発明の回転体支持装置は、上述の目的を達成するため
、固定軸と、この固定軸に外嵌され、動圧空気軸受を介
して前記固定軸を中心として回転するモーターロータお
よびスラスト荷重支持用磁気軸受の回転側磁気リングを
備えた回転組立体と、この回転組立体を回転させる駆動
機構部とから成る回転体支持装置において、前記回転組
立体側の軸端側とこれに対向する固定側の間に吸着防止
部を形成することにより１回転側と固定側との吸着を阻
止し、信頼性を向上させたことを特徴とする。[Summary of the Invention] In order to achieve the above-mentioned object, the rotating body support device of the present invention includes a fixed shaft, and a motor that is fitted onto the fixed shaft and rotates around the fixed shaft via a dynamic pressure air bearing. A rotating body support device comprising a rotating assembly including a rotating side magnetic ring of a magnetic bearing for supporting a rotor and a thrust load, and a drive mechanism unit for rotating this rotating assembly, the shaft end side on the rotating assembly side and the The present invention is characterized in that a suction preventing portion is formed between the stationary sides facing each other to prevent suction between the one-rotation side and the stationary side, thereby improving reliability.
［発明の実施例］
以下、第１図ないし第７図を参照して本発明の詳細な説
明する。[Embodiments of the Invention] The present invention will be described in detail below with reference to FIGS. 1 to 7.
第１図は本発明を適用した回転多面体技光偏向器を示す
。FIG. 1 shows a rotating polyhedral optical deflector to which the present invention is applied.
この光偏向器は、上側ケーシング３１とその下端を閉塞
する下側ケーシング３２とから成るケーシング３０と、
このケーシングの中央に植立され、下端および上端を固
定ネジ３３によってケーシング３０に固着された固定軸
４０と、この固定軸にｉｔｓした回転組立体５０と、こ
の回転組立体を回転させる、駆動機構部６０とから構成
されている。This optical deflector includes a casing 30 consisting of an upper casing 31 and a lower casing 32 that closes the lower end of the casing 30;
A fixed shaft 40 is installed in the center of this casing, and its lower and upper ends are fixed to the casing 30 by fixing screws 33, a rotating assembly 50 that is attached to this fixed shaft, and a drive mechanism that rotates this rotating assembly. 60.
７０は緩衝部材を示す。70 indicates a buffer member.
固定軸４０は超硬合金または窒化硅素などで表面硬化処
理をした非常に硬い材料から成り、第２図に示すように
軸線方向の中央部やや上側に単一のジャーナル部４１が
形成されている。このジャーナル部にはその上下端から
中央部近傍に向って回転組立体５０の回転方向に傾斜す
るヘリンボーン溝４２が数μｍの深さで削設されている
。また、ジャーナル部４１の下側に形成された小径部に
はスラスト荷重支持用磁気軸受の固定側磁気リング４３
が外嵌され、接着等により固着されている。The fixed shaft 40 is made of a very hard material that has been surface hardened with cemented carbide or silicon nitride, and has a single journal portion 41 formed slightly above the center in the axial direction, as shown in FIG. . A herringbone groove 42, which is inclined in the direction of rotation of the rotary assembly 50 from the upper and lower ends to the vicinity of the center part, is cut in this journal part to a depth of several μm. In addition, a fixed side magnetic ring 43 of a magnetic bearing for supporting a thrust load is provided in a small diameter portion formed on the lower side of the journal portion 41.
is fitted onto the outside and fixed with adhesive or the like.
回転組立体５０は第３図に示すように、シリンダ部５１
を備えた多面体技５２と、この多面体技５２の内側上方
に嵌挿接着した軸受部５３と、シリンダ部５１の下端内
側に嵌合固着したスラスト荷重支持用磁気軸受の回転側
磁気リング５４と、シリンダ部５１の外側に嵌合固着し
たモーターマグネットロータ５５とから成る。上記軸受
部５３は前述の固定軸４０と同様に非常に硬い材料から
成り、その内径は固定軸４０のジャーナル部４１の外径
に対して３μｍ−７μｍ程度の微小間隙が形成される寸
法とされている。また、ジャーナル部４１と軸受部５３
の円筒度は１μｍ程度の精度とされている。The rotating assembly 50 includes a cylinder portion 51 as shown in FIG.
a bearing part 53 that is fitted and bonded to the upper inside of the polyhedral part 52; a rotation-side magnetic ring 54 of a thrust load supporting magnetic bearing that is fitted and fixed to the inside of the lower end of the cylinder part 51; It consists of a motor magnet rotor 55 that is fitted and fixed to the outside of the cylinder part 51. The bearing portion 53 is made of a very hard material like the fixed shaft 40 described above, and its inner diameter is dimensioned to form a minute gap of about 3 μm to 7 μm with respect to the outer diameter of the journal portion 41 of the fixed shaft 40. ing. In addition, the journal part 41 and the bearing part 53
The cylindricity is said to be accurate to about 1 μm.
回転側磁気リング（外輪）５４の内径は固定側磁気リン
グ（内輪）４３との間に適当の微小間隙が形成される寸
法とされており、これらの磁気リングは第１図に示すよ
うに対向配置されてスラスト荷重支持用磁気軸受を形成
している。The inner diameter of the rotating side magnetic ring (outer ring) 54 is dimensioned to form an appropriate minute gap between it and the stationary side magnetic ring (inner ring) 43, and these magnetic rings face each other as shown in FIG. They are arranged to form a magnetic bearing for supporting thrust loads.
また、この磁気軸受の外側やや上方にはシリンダ部５１
を介してモーターマグネットローター５５が同軸的に配
置されている。Further, a cylinder portion 51 is located slightly above the outside of this magnetic bearing.
A motor magnet rotor 55 is coaxially arranged through the motor magnet rotor 55.
駆動機構部６０は、モーターマグネットロータ５５を囲
繞するよう円周方向に所定の間隔をおいて設置した磁極
６１と、これらの磁極に取付けた駆動コイル６２とから
成り、これらの駆動コイルに供給される電流のタイミン
グを制御するモータ駆動用回路基板６３と共に、下側ケ
ーシング３２上にねじ止め固定されている。The drive mechanism section 60 is composed of magnetic poles 61 installed at predetermined intervals in the circumferential direction so as to surround the motor magnet rotor 55, and drive coils 62 attached to these magnetic poles. The motor drive circuit board 63 is screwed onto the lower casing 32 together with a motor drive circuit board 63 that controls the timing of the current.
緩衝部・材７０は耐摩耗性部材７１と弾性部材７２とか
ら成り、耐摩耗性部材７１の表面には第４図（Ａ）に示
すように多数個のスリット７３が放射状に削設され、吸
着防止部を構成している。なお、吸着防止部は第４図（
Ｂ）に示すように耐摩耗性部材を多数本の円柱状突起７
４で構成し、それらの間に円周および半径方向に多数の
空気流通路７５が形成されるようにしたものでもよい。The buffer member/material 70 consists of a wear-resistant member 71 and an elastic member 72, and a large number of slits 73 are cut radially on the surface of the wear-resistant member 71 as shown in FIG. 4(A). It constitutes an adsorption prevention section. The adsorption prevention part is shown in Figure 4 (
B) As shown in FIG.
4, with a large number of airflow passages 75 formed between them in the circumferential and radial directions.
光偏向器の上側ケーシング３１には第５図に示すように
レーザ発光ユニット８１を備えた入光部８０と、レンズ
ユニット（ｆ−θレンズ）９１を備えた出光部９０とが
気密に固着され、ケーシング内には清浄空気が封入され
ている。As shown in FIG. 5, the upper casing 31 of the optical deflector has a light input section 80 equipped with a laser emitting unit 81 and a light output section 90 equipped with a lens unit (f-theta lens) 91, which are hermetically fixed. , clean air is sealed inside the casing.
上述のように、本発明の回転体支持装置においては、固
定軸４０のジャーナル部４１と回転組立体５０の軸受部
５３の間に動圧空気ジャーナル軸受が形成され、また、
固定軸に嵌合した固定側磁気リング４３と回転組立体５
０のシリンダ５１の内側に固定した回転側磁気リング５
４とによってスラスト荷重支持用磁気軸受が形成されて
いるので、モータ駆動用回路基板６３を通して駆０機構
部６ｏに回転磁界を発生させると、モーターマグネット
ロータ５５がこれに吸引されて回転し、多面体ｖＬ５２
も回転する。従ってレーザ発光ユニット８１から入射し
たレーザビームは高速回転する多面体＆ｉ５２によって
反射し、出光部９０からレンズユニット（ｆ−θレンズ
）９１を通して出光し、感光体上をスキャンニングする
。As described above, in the rotating body support device of the present invention, a hydrodynamic air journal bearing is formed between the journal portion 41 of the fixed shaft 40 and the bearing portion 53 of the rotating assembly 50, and
Fixed side magnetic ring 43 fitted to the fixed shaft and rotating assembly 5
Rotating side magnetic ring 5 fixed inside the cylinder 51 of 0
4 forms a magnetic bearing for supporting thrust loads, so when a rotating magnetic field is generated in the drive mechanism section 6o through the motor drive circuit board 63, the motor magnet rotor 55 is attracted by this and rotates, and the polyhedron is rotated. vL52
It also rotates. Therefore, the laser beam incident from the laser emitting unit 81 is reflected by the polyhedron &i52 which rotates at high speed, and is emitted from the light emitting section 90 through the lens unit (f-theta lens) 91 to scan the photoreceptor.
１、 上述の如く、本発明の回転体支持装置にお
いては、回転組立体と緩衝部材（固定側）の間に吸着防
止部を形成したから回転組立体がスラスト方向に大幅に
移動し、固定側に接触しても吸着防止部の作用により吸
着は防止され、再び磁気スラスト軸受によって定まる標
準位置に戻る。1. As mentioned above, in the rotating body support device of the present invention, since the adsorption prevention part is formed between the rotating assembly and the buffer member (fixed side), the rotating assembly moves significantly in the thrust direction, and the fixed side Even if it comes into contact with the magnetic thrust bearing, the attraction is prevented by the action of the attraction prevention part, and the magnetic thrust bearing returns to the standard position determined by the magnetic thrust bearing.
なお、本発明においては吸着防止部を第６図に示すよう
に、回転組立体のシリンダ５１の端面に削設した多数本
の放射状スリットによって構成してもよく、また、第７
図に示すように回転組立体５０のシリンダ部に突設した
リング状突起７６によって構成してもよい。In the present invention, as shown in FIG. 6, the adsorption prevention section may be constructed of a large number of radial slits cut into the end surface of the cylinder 51 of the rotary assembly.
As shown in the figure, it may be configured by a ring-shaped projection 76 protruding from the cylinder portion of the rotating assembly 50.
また、本発明の回転体支持装置は上述のレーザプリンタ
に限らず、各種の高速回転体の支持に広く適用すること
ができる。Furthermore, the rotating body support device of the present invention is not limited to the above-mentioned laser printer, but can be widely applied to support various high-speed rotating bodies.
［発明の効果］
上述の如く、本発明によれば回転組立体の吸着による回
転不能は防止され、信頼性の高い回転組立体を構成でき
る。[Effects of the Invention] As described above, according to the present invention, the rotary assembly is prevented from being unable to rotate due to adsorption, and a highly reliable rotary assembly can be constructed.
第１図は本発明の実施例を示す縦断面図、第２図は第１
図における固定軸を示°す側面図、第３図は第１図にお
ける回転組立体を示す斜視図、第４図（Ａ）、（Ｂ）は
それぞれ本発明の回転体支持装置における吸着防止部の
実施例を示す斜視図。
第５図は本発明の回転体支持装置を回転多面体鏡装置に
組み込んだ状態を例示する縦断面図、第６図と第７図は
本発明の変形例を示す回転組立体の斜視図、第８図は本
発明の回転体支持装置が適用されるレーザプリンタを例
示する斜視図、第９図は従来の回転体支持装置を例示す
る縦断面図、第１０図は第９図の装置の作動を説明する
縦断面図である。
１・・・レーザ光源
２・・・レーザビーム
３・・・回転多面体鏡装置
４・・・レンズユニット
５・・・感光体
１０．４０・・・固定軸
１１．３０・・・モーターケーシング
１２ａ、１２ｂ、４１−・・ジャーナル部１３．５１・
・・シリンダ
１４．５２・・・多面体技
１５．５５・・・モーターマグネットロータ１６ａ、５
４・・・スラスト荷重支持用磁気軸受の回転側磁気リン
グ
１８ｂ、４３・・・固体磁気リング
２０．５０・・・回転組立体
２１．６２・・・駆動コイル
２３．６０・・・駆動機構部
２４．６３・・・モータ駆動用回路基板５３・・・軸受
部
５・６，７３・・・スリット
２５．２６．７０・・・緩衝部材
７１・・・耐摩耗性部材
７５・・・空気流通路
７６・・・リング状突起
８０・・・入光部
８１・・・レーザ発光ユニット
９０・・・出光部
９１・・・レンズユニット（ｆ−θレンズ）出願人
株式会社 東芝
代理人弁理士 須 山 佐 −
第１図”
第３図
第４図Ａ
第４図Ｂ
第５図
第６図
第７図FIG. 1 is a vertical sectional view showing an embodiment of the present invention, and FIG.
3 is a side view showing the fixed shaft in the figure, FIG. 3 is a perspective view showing the rotating assembly in FIG. FIG. FIG. 5 is a longitudinal sectional view illustrating a state in which the rotating body support device of the present invention is incorporated into a rotating polygon mirror device; FIGS. 6 and 7 are perspective views of a rotating assembly showing a modification of the present invention; FIG. 8 is a perspective view illustrating a laser printer to which the rotating body support device of the present invention is applied, FIG. 9 is a vertical sectional view illustrating a conventional rotary body supporting device, and FIG. 10 is an operation of the device shown in FIG. 9. FIG. 1...Laser light source 2...Laser beam 3...Rotating polyhedral mirror device 4...Lens unit 5...Photoreceptor 10.40...Fixed shaft 11.30...Motor casing 12a, 12b, 41-...Journal part 13.51-
... Cylinder 14.52 ... Polyhedral technique 15.55 ... Motor magnet rotor 16a, 5
4...Rotating side magnetic ring 18b of thrust load supporting magnetic bearing, 43...Solid magnetic ring 20.50...Rotating assembly 21.62...Drive coil 23.60...Drive mechanism section 24.63... Motor drive circuit board 53... Bearing parts 5, 6, 73... Slits 25.26.70... Buffer member 71... Wear-resistant member 75... Air circulation Path 76...Ring-shaped protrusion 80...Light entrance part 81...Laser emission unit 90...Light emission part 91...Lens unit (f-θ lens) Applicant
Toshiba Corporation Patent Attorney Satoshi Suyama - Figure 1'' Figure 3 Figure 4 A Figure 4 B Figure 5 Figure 6 Figure 7
Claims (5)
を介して前記固定軸を中心として回転するモーターロー
タおよびスラスト荷重支持用磁気軸受の回転側磁気リン
グを備えた回転組立体と、この回転組立体を回転させる
駆動機構部とから成る回転体支持装置において、前記回
転組立体側の軸端側とこれに対向する固定側の間に吸着
防止部を形成したことを特徴とする回転体支持装置。(1) A rotating assembly comprising a fixed shaft, a motor rotor that is fitted onto the fixed shaft and rotates around the fixed shaft via a hydrodynamic air bearing, and a magnetic ring on the rotating side of a thrust load supporting magnetic bearing. and a drive mechanism section for rotating the rotating assembly, characterized in that a suction prevention section is formed between the shaft end side of the rotating assembly side and the fixed side opposite thereto. Rotating body support device.
のスリットを形成して構成されていることを特徴とする
特許請求の範囲第１項記載の回転体支持装置。(2) The rotating body support device according to claim 1, wherein the adsorption prevention portion is configured by forming a large number of slits in the cylinder end face of the rotating assembly.
リットを形成して構成されていることを特徴とする第１
項記載の回転体支持装置。(3) A first feature in which the adsorption prevention part is configured by forming a large number of slits on the surface of the buffer member on the fixed side.
Rotating body support device as described in .
円柱体にて構成され、これらの円柱体の間に多数の空気
流通路が形成されていることを特徴とする特許請求の範
囲第１項記載の回転体支持装置。(4) A patent claim characterized in that the adsorption prevention part is made up of a plurality of cylindrical bodies as the wear-resistant member of the buffer member, and a number of air flow passages are formed between these cylindrical bodies. The rotating body support device according to scope 1.
リング状突起から成ることを特徴とする特許請求の範囲
第１項記載の回転体支持装置。(5) The rotary body support device according to claim 1, wherein the adsorption prevention portion comprises a ring-shaped protrusion formed at the cylinder end of the rotary assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11156785A JPS61269117A (en) | 1985-05-24 | 1985-05-24 | Device for supporting rotary body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11156785A JPS61269117A (en) | 1985-05-24 | 1985-05-24 | Device for supporting rotary body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61269117A true JPS61269117A (en) | 1986-11-28 |
Family
ID=14564648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11156785A Pending JPS61269117A (en) | 1985-05-24 | 1985-05-24 | Device for supporting rotary body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61269117A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0339714U (en) * | 1989-05-15 | 1991-04-17 |
-
1985
- 1985-05-24 JP JP11156785A patent/JPS61269117A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0339714U (en) * | 1989-05-15 | 1991-04-17 |
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