JPH0893750A - Light deflecting device having dynamic pressure bearing - Google Patents
Light deflecting device having dynamic pressure bearingInfo
- Publication number
- JPH0893750A JPH0893750A JP23548194A JP23548194A JPH0893750A JP H0893750 A JPH0893750 A JP H0893750A JP 23548194 A JP23548194 A JP 23548194A JP 23548194 A JP23548194 A JP 23548194A JP H0893750 A JPH0893750 A JP H0893750A
- Authority
- JP
- Japan
- Prior art keywords
- rotating body
- bearing
- dynamic pressure
- resin material
- radial bearing
- 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
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は回転体と、非回転体間に
動圧発生用溝を形成し、回転体の回転により前記動圧発
生用溝の作用で回転体と非回転体間に間隙を形成するこ
とにより、回転体の高速回転を可能とした回転機械の動
圧軸受と、光偏向装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a dynamic pressure generating groove between a rotating body and a non-rotating body, and the rotation of the rotating body causes the dynamic pressure generating groove to act between the rotating body and the non-rotating body. The present invention relates to a dynamic pressure bearing of a rotary machine that allows a rotating body to rotate at high speed by forming a gap, and an optical deflector.
【０００２】[0002]
【従来の技術】一般に動圧軸受を用いた回転体を設置す
るには水平設置が基本となっている。そして動圧軸受
は、回転体の高速回転により発生する風を非回転体に設
けた前記動圧発生用溝に導入し、前記風により、該動圧
発生用溝より強力な風圧を前記回転体面に当てることで
非回転体面と、回転体面間に数μm単位の空気間隙を形
成し、非回転体と、回転体間の抵抗を低下させる事で、
回転体の高速回転を可能にしている。前記のような回転
体を、固定された前記ラジアル軸受と、スラスト軸受に
設けた動圧発生用溝より数μm単位の空気間隙で浮かせ
ながら3000rpm以上の回転数で高速回転するポリゴンミ
ラーを形成した光偏向装置として使用されている。特に
前記の回転体は重量の軽さと、精度及び非磁性体として
優れたセラミックス材が使用されている。又前記回転体
に磁石が固定されている。前記の様に回転体は3000rpm
以上の高速回転を行っているため、前記磁石に遠心力が
働くため、安全上、離脱防止手段が取られている。該離
脱防止手段として特開昭62-254113号の如く金属体より
なる回転体に、磁極と軸を一体成形した構成は知られて
いる。2. Description of the Related Art In general, horizontal installation is the basis for installing a rotating body using a dynamic pressure bearing. The dynamic pressure bearing introduces the wind generated by the high speed rotation of the rotating body into the dynamic pressure generating groove provided in the non-rotating body, and the wind generates a stronger wind pressure than the dynamic pressure generating groove on the surface of the rotating body. By applying an air gap between the non-rotating body surface and the rotating body surface to form an air gap of several μm unit, the resistance between the non-rotating body and the rotating body is reduced,
It enables high-speed rotation of the rotating body. A polygon mirror that rotates at a high speed at 3000 rpm or more is formed by floating the above-mentioned rotating body in the radial bearing fixed and the dynamic pressure generating groove provided in the thrust bearing in an air gap of several μm unit. It is used as a light deflector. In particular, the rotating body is made of a ceramic material which is light in weight and excellent in precision and non-magnetic body. A magnet is fixed to the rotating body. As mentioned above, the rotating body is 3000 rpm
Since the above high-speed rotation is performed, a centrifugal force acts on the magnet, so that a separation preventing means is taken for safety. As the detachment preventing means, there is known a structure in which a magnetic pole and a shaft are integrally formed on a rotating body made of a metal body, as disclosed in JP-A-62-254113.
【０００３】[0003]
【発明が解決しようとする課題】以上のような動圧軸受
は前記のように水平に設置されていれば回転体として形
成されたセラミックス材は、前記のような特徴を有する
が、一方セラミックス材は極めて硬度が高いため、加工
が困難であるため金属又は樹脂等で形成されたポリゴン
ミラーを別体に製作している。しかるに前記ポリゴンミ
ラーをセラミックス材に接着する時、接着強度が弱く、
剥がれ易いため複数の取り付け部材を用いて挟着固定し
ているが、装置全体が大型となり、重くなる欠点があ
る。特に前記のような高速回転するポリゴンミラーを形
成した光偏向装置として使用する時は問題があり、又他
のラジアル軸受、及びスラスト軸受に於いてもセラミッ
クス材は製造単価が高いため、装置全体を高価にする欠
点がある。If the dynamic pressure bearing as described above is installed horizontally as described above, the ceramic material formed as a rotating body has the above-mentioned characteristics. Since it has extremely high hardness and is difficult to process, a polygon mirror made of metal or resin is manufactured separately. However, when the polygon mirror is bonded to the ceramic material, the bonding strength is weak,
Since it is easily peeled off, it is sandwiched and fixed by using a plurality of mounting members, but there is a drawback that the entire device becomes large and heavy. In particular, there is a problem when it is used as an optical deflecting device formed with a polygon mirror that rotates at a high speed as described above. Also, in other radial bearings and thrust bearings, the manufacturing cost of ceramic materials is high, so the entire device is It has the drawback of being expensive.
【０００４】又前記動圧軸受で回転体を回転するため、
該回転体に磁石を設け、該磁石と対峙して固定したステ
ータコイルで回転するように構成している。従って、前
記の様に高速回転するセラミックス製の回転体に磁石を
設けた時、接着力の弱い前記磁石が遠心力で剥がれ、外
方に飛び散る危険がある。又前記磁石が外部に突出して
いるため、その分動圧軸受全体を大型化する欠点があっ
た。Since the rotating body is rotated by the dynamic pressure bearing,
A magnet is provided on the rotating body, and a stator coil fixed to face the magnet is used for rotation. Therefore, when the magnet is provided on the ceramic rotating body that rotates at a high speed as described above, there is a risk that the magnet having a weak adhesive force is peeled off by the centrifugal force and scattered outward. Further, since the magnet is projected to the outside, there is a drawback that the whole dynamic pressure bearing is increased in size by that amount.
【０００５】本発明は前記のような欠点を改善するため
特に考えられたものである。即ち、動圧軸受を有する光
偏向装置で、回転体を樹脂材で一体形成し、ポリゴンミ
ラーを形成した部材を強固に接着すると共に、前記回転
体は磁石と共に樹脂材で一体形成することにより安価で
安全であり、且つ小型化することを目的とするものであ
る。The present invention has been particularly conceived in order to remedy the above-mentioned drawbacks. That is, in an optical deflecting device having a dynamic pressure bearing, a rotating body is integrally formed of a resin material, a member having a polygon mirror is firmly adhered, and the rotating body is integrally formed of a resin material together with a magnet, which is inexpensive. It is intended to be compact, safe, and compact.
【０００６】[0006]
【課題を解決するための手段】本発明は前記目的のた
め、請求項１に於いて、ラジアル軸受と、該ラジアル軸
受の両端に設けたスラスト軸受とを有し、前記ラジアル
軸受と、前記スラスト軸受間に回転自在に設けられた回
転体を有する動圧軸受に於いて、前記回転体と、前記ラ
ジアル軸受と、前記スラスト軸受が樹脂材及び／又はセ
ラミックス材で形成されていること。請求項２に於い
て、前記回転体を樹脂材に、前記ラジアル軸受と、前記
スラスト軸受をセラミックス材で各々形成したこと。請
求項３に於いて、前記回転体と、前記ラジアル軸受を樹
脂材に、前記スラスト軸受をセラミックス材で各々形成
したこと。請求項４に於いて、前記樹脂材で形成された
回転体に光偏向部材を接着固定したこと。請求項５に於
いて、前記回転体を、ラジアル軸受を介して複数のスラ
スト軸受で保持する動圧軸受に於いて、前記回転体と、
前記スラスト軸受の内一方のスラスト軸受を樹脂材に、
ラジアル軸受と、前記スラスト軸受のうち、他方のスラ
スト軸受をセラミックスで各々形成したこと。請求項６
に於いて、前記樹脂材は吸水率0.1％以下、線膨張率−
1.0〜4.0×10-5／℃、曲げ弾性率10000MPa以上の特性を
持った熱可塑性樹脂材であること。請求項７に於いて、
ラジアル軸受と、該ラジアル軸受の両端に設けたスラス
ト軸受とを有し、前記ラジアル軸受と、前記スラスト軸
受間に回転自在に設けられた回転体を有する動圧軸受に
於いて、樹脂材で形成された前記回転体に、ガラス材及
び／又はカーボン材が混入されていること。請求項８に
於いて、周面に複数の反射面を形成した回転体を有する
光偏向装置に於いて、前記回転体を樹脂材で形成すると
共に、前記回転体の一部に回転用マグネットを一体形成
したこと。請求項９に於いて、前記回転体は、ラジアル
軸受と、該ラジアル軸受の両端に設けたスラスト軸受と
を有し、前記ラジアル軸受と、前記スラスト軸受間に回
転自在に設けられていることにより達成される。For this purpose, the present invention comprises, in claim 1, a radial bearing, and thrust bearings provided at both ends of the radial bearing, the radial bearing and the thrust bearing. In a dynamic pressure bearing having a rotating body rotatably provided between the bearings, the rotating body, the radial bearing, and the thrust bearing are formed of a resin material and / or a ceramic material. 3. The rotating body according to claim 2, wherein the rotating body is made of a resin material, and the radial bearing and the thrust bearing are made of a ceramic material. The rotating body and the radial bearing are made of a resin material, and the thrust bearing is made of a ceramic material. The light deflecting member according to claim 4, wherein a light deflecting member is fixedly adhered to the rotating body formed of the resin material. The dynamic pressure bearing according to claim 5, wherein the rotating body is held by a plurality of thrust bearings via a radial bearing,
One of the thrust bearings is made of a resin material,
The radial bearing and the other thrust bearing of the thrust bearings are made of ceramics. Claim 6
In the above, the resin material has a water absorption rate of 0.1% or less and a linear expansion coefficient −
It should be a thermoplastic resin material with the characteristics of 1.0 to 4.0 × 10 -5 / ℃ and flexural modulus of 10,000 MPa or more. In claim 7,
A dynamic pressure bearing having a radial bearing and thrust bearings provided at both ends of the radial bearing, and having a radial body and a rotating body rotatably provided between the thrust bearings. A glass material and / or a carbon material is mixed in the rotating body. 9. The optical deflector according to claim 8, wherein the rotating body is formed of a resin material, and the rotating body has a rotating magnet formed on a part of the rotating body. That it was integrally formed. 10. The rotating body according to claim 9, wherein the rotating body has a radial bearing and thrust bearings provided at both ends of the radial bearing, and is rotatably provided between the radial bearing and the thrust bearing. To be achieved.
【０００７】[0007]
【実施例】図１は動圧軸受11を示す。１はポリゴンミラ
ーの回転支持装置を示し、該回転支持装置１には上下に
セラミックス材よりなる板状のスラスト軸受２，３を設
け、該スラスト軸受２，３間に挟まれるようにセラミッ
クス材よりなる円柱状のラジアル軸受４を固定する。そ
して前記スラスト軸受２の案内面21と、スラスト軸受３
の案内面31と、ラジアル軸受４の案内面41には各々動圧
発生用溝22，32，42を形成する。前記案内面21，31，41
に対し、回動自在に形成した対向面51，54，55を形成
し、樹脂材よりなる回転体５を設けると共に、該回転体
５は前記ラジアル軸受４を回転中心となるように設け、
前記回転体５の外周52に、多角形のミラー面71を形成
し、樹脂材よりなるポリゴンミラー７を接着材53で接着
固定して設ける。前記回転体５の下端部にはマグネット
６を設け、前記回転支持装置１には前記マグネット６に
対向したステータコイル８が前記回転支持装置１に設け
られ、前記ステータコイル８に通電することで回転体５
を高速度で誘導回転させる。FIG. 1 shows a dynamic pressure bearing 11. Reference numeral 1 denotes a rotary support device for a polygon mirror. The rotary support device 1 is provided with plate-like thrust bearings 2 and 3 made of a ceramic material on the upper and lower sides, and is made of a ceramic material so as to be sandwiched between the thrust bearings 2 and 3. The cylindrical radial bearing 4 is fixed. The guide surface 21 of the thrust bearing 2 and the thrust bearing 3
Grooves 22, 32, 42 for generating dynamic pressure are formed in the guide surface 31 and the guide surface 41 of the radial bearing 4, respectively. The guide surface 21, 31, 41
On the other hand, the rotatably formed facing surfaces 51, 54, 55 are formed, the rotating body 5 made of a resin material is provided, and the rotating body 5 is provided with the radial bearing 4 as the center of rotation.
A polygonal mirror surface 71 is formed on the outer periphery 52 of the rotating body 5, and a polygon mirror 7 made of a resin material is provided by being adhesively fixed with an adhesive material 53. A magnet 6 is provided at a lower end portion of the rotating body 5, and a stator coil 8 facing the magnet 6 is provided in the rotation support device 1 in the rotation support device 1 and is rotated by energizing the stator coil 8. Body 5
Induction rotation at high speed.
【０００８】尚前記回転体５の樹脂材は、吸水率0.1％
以下、線膨張率−1.0〜4.0×10-5／℃、曲げ弾性率1000
0MPa以上の特性を持った熱可塑性樹脂材で形成され、更
に特性改善のためガラス繊維、ガラスビーズ、カーボ
ン、ウイスカ等を混入してもよい。又前記案内面21，4
1，31と、対向面51，54，55は各々１〜７μmの間隙で設
けられる。又前記ポリゴンミラー７を金属で製作し、接
着するか又はネジ付リング部材又はネジ等で固定しても
よい。The resin material of the rotating body 5 has a water absorption rate of 0.1%.
Below, linear expansion coefficient -1.0 ~ 4.0 x 10 -5 / ℃, flexural modulus 1000
It is formed of a thermoplastic resin material having a property of 0 MPa or more, and glass fibers, glass beads, carbon, whiskers and the like may be mixed in order to further improve the property. Also, the guide surfaces 21, 4
1, 31 and the facing surfaces 51, 54, 55 are respectively provided with a gap of 1 to 7 μm. Further, the polygon mirror 7 may be made of metal and may be adhered or fixed by a threaded ring member or a screw.
【０００９】図２は、図１同様に動圧軸受11を示す。１
はポリゴンミラーの回転支持装置を示し、該回転支持装
置１には上下にセラミックス材よりなる板状のスラスト
軸受２，３を設け、該スラスト軸受２，３間に挟まれる
ように樹脂材よりなる円柱状のラジアル軸受４を固定す
る。そして前記スラスト軸受２の案内面21と、スラスト
軸受３の案内面31と、ラジアル軸受４の案内面41には各
々動圧発生用溝22，32，42を形成する。前記案内面21，
31，41に対し回動自在に形成した対向面51，54，55を形
成し、樹脂材よりなる回転体５を設けると共に、該回転
体５は前記ラジアル軸受４を回転中心となるように設
け、前記回転体５の外周52に、多角形のミラー面71を形
成し、樹脂材よりなるポリゴンミラー７を接着材53で接
着固定して設ける。前記回転体５の下端部にはマグネッ
ト６を一体形成により設け、前記回転支持装置１には前
記マグネット６に対向したステータコイル８が前記回転
支持装置１に設けられ、前記ステータコイル８に通電す
ることで回転体５を高速度で誘導回転させる。FIG. 2 shows the dynamic pressure bearing 11 as in FIG. 1
Shows a rotary support device of a polygon mirror. The rotary support device 1 is provided with plate-like thrust bearings 2 and 3 made of a ceramic material on the upper and lower sides, and made of a resin material so as to be sandwiched between the thrust bearings 2 and 3. The cylindrical radial bearing 4 is fixed. Dynamic pressure generating grooves 22, 32, 42 are formed in the guide surface 21 of the thrust bearing 2, the guide surface 31 of the thrust bearing 3, and the guide surface 41 of the radial bearing 4, respectively. The guide surface 21,
Opposing surfaces 51, 54, 55 formed so as to be rotatable with respect to 31, 41 are provided with a rotating body 5 made of a resin material, and the rotating body 5 is provided with the radial bearing 4 as a rotation center. A polygonal mirror surface 71 is formed on the outer circumference 52 of the rotating body 5, and the polygon mirror 7 made of a resin material is provided by being adhered and fixed by an adhesive material 53. A magnet 6 is integrally formed at the lower end of the rotating body 5, and a stator coil 8 facing the magnet 6 is provided in the rotation supporting device 1 in the rotation supporting device 1 to energize the stator coil 8. As a result, the rotating body 5 is induced to rotate at a high speed.
【００１０】図３は、前記図１と、図２同様に動圧軸受
11を示す。１はポリゴンミラーの回転支持装置を示し、
該回転支持装置１には下位置に設けた板状のスラスト軸
受２を樹脂材で、上位置に設けたスラスト軸受３をセラ
ミックス材で形成して設け、該スラスト軸受２，３間に
挟まれるようにセラミックス材で形成した円柱状のラジ
アル軸受４を固定する。そして前記スラスト軸受２の案
内面21と、スラスト軸受３の案内面31と、ラジアル軸受
４の案内面41には各々動圧発生用溝22，32，42を形成す
る。前記案内面21，31，41に対し、回動自在に形成した
対向面51，54，55を形成し、樹脂材よりなる回転体５を
設けると共に、該回転体５は前記ラジアル軸受４を回転
中心となるように設け、前記回転体５の外周52に、多角
形のミラー面71を形成し、樹脂材よりなるポリゴンミラ
ー７を接着材53で接着固定して設ける。前記回転体５の
下端部にはマグネット６を一体形成により設け、前記回
転支持装置１には前記マグネット６に対向したステータ
コイル８が前記回転支持装置１に設けられ、前記ステー
タコイル８に通電することで回転体５を高速度で誘導回
転させる。FIG. 3 is a dynamic pressure bearing similar to FIG. 1 and FIG.
Indicates 11. Reference numeral 1 denotes a rotary support device for a polygon mirror,
The rotary support device 1 is provided with a plate-shaped thrust bearing 2 provided at a lower position made of a resin material and a thrust bearing 3 provided at an upper position made of a ceramic material, and sandwiched between the thrust bearings 2 and 3. Thus, the cylindrical radial bearing 4 formed of a ceramic material is fixed. Dynamic pressure generating grooves 22, 32, 42 are formed in the guide surface 21 of the thrust bearing 2, the guide surface 31 of the thrust bearing 3, and the guide surface 41 of the radial bearing 4, respectively. Opposing surfaces 51, 54, 55 that are rotatably formed are formed on the guide surfaces 21, 31, 41, and a rotating body 5 made of a resin material is provided, and the rotating body 5 rotates the radial bearing 4. A polygonal mirror surface 71 is formed on the outer periphery 52 of the rotating body 5 so as to be centered, and a polygon mirror 7 made of a resin material is bonded and fixed with an adhesive material 53. A magnet 6 is integrally formed at the lower end of the rotating body 5, and a stator coil 8 facing the magnet 6 is provided in the rotation supporting device 1 in the rotation supporting device 1 to energize the stator coil 8. As a result, the rotating body 5 is induced to rotate at a high speed.
【００１１】図４は、動圧軸受11を示す。１はポリゴン
ミラーの回転支持装置を示し、該回転支持装置１には上
下位置に設けた板状のスラスト軸受２，３をセラミック
ス材で形成して設け、該スラスト軸受２，３間に挟まれ
るようにセラミックス材で形成した円柱状のラジアル軸
受４を固定する。そして前記スラスト軸受２の案内面21
と、スラスト軸受３の案内面31と、ラジアル軸受４の案
内面41には各々動圧発生用溝22，32，42を形成する。前
記案内面21，31，41に対し、回動自在に形成した対向面
51，54，55を形成すると共に、多角形の反射面71を一体
に形成し、樹脂材よりなる回転体５Ａを設ける。該回転
体５Ａは前記ラジアル軸受４を回転中心となるように設
けられている。前記回転体５Ａの下端部にはマグネット
６を一体形成により設け、前記回転支持装置１には前記
マグネット６に対向したステータコイル８が前記回転支
持装置１に設けられ、前記ステータコイル８に通電する
ことで回転体５を高速度で誘導回転させる。尚前記マグ
ネット６は、回転体５Ａに形成された対向面51面より突
出しない様に前記回転体５Ａと共に形成する。FIG. 4 shows the dynamic pressure bearing 11. Reference numeral 1 denotes a rotary support device for a polygon mirror. The rotary support device 1 is provided with plate-like thrust bearings 2 and 3 provided at upper and lower positions made of a ceramic material and sandwiched between the thrust bearings 2 and 3. Thus, the cylindrical radial bearing 4 formed of a ceramic material is fixed. And the guide surface 21 of the thrust bearing 2
On the guide surface 31 of the thrust bearing 3 and the guide surface 41 of the radial bearing 4, dynamic pressure generating grooves 22, 32 and 42 are formed. Opposing surface formed so as to be rotatable with respect to the guide surfaces 21, 31, 41
51, 54 and 55 are formed, a polygonal reflecting surface 71 is integrally formed, and a rotating body 5A made of a resin material is provided. The rotating body 5A is provided so that the radial bearing 4 serves as the center of rotation. A magnet 6 is integrally formed at the lower end of the rotating body 5A, and a stator coil 8 facing the magnet 6 is provided in the rotary support device 1 in the rotary support device 1 to energize the stator coil 8. As a result, the rotating body 5 is induced to rotate at a high speed. The magnet 6 is formed together with the rotating body 5A so as not to project from the surface 51 of the facing surface formed on the rotating body 5A.
【００１２】図５は前記図４に於ける回転体５Ａの対向
面51面より見た平面図で、前記マグネット６の形状を示
す。該マグネット６は、図示のようにリング状に形成さ
れ、樹脂材で形成された回転体５Ａ内に一体に埋め込ま
れている。前記マグネット６はゴム材、又は樹脂材に鉄
粉等を混合して形成したマグネットに、外部より磁界発
生手段を用いて磁界を形成し、着磁したものを使用して
もよく、又リング状に形成した金属製の永久磁石を一体
に形成してももよい。FIG. 5 is a plan view of the rotating body 5A shown in FIG. The magnet 6 is formed in a ring shape as shown in the figure, and is integrally embedded in the rotating body 5A made of a resin material. The magnet 6 may be a magnet formed by mixing an iron powder or the like with a rubber material or a resin material and forming a magnetic field from the outside by using a magnetic field generating means, or may be magnetized. The metal permanent magnet formed in step 1 may be integrally formed.
【００１３】図６は、前記図５の他の実施例で、本実施
例も回転体５Ａの対向面51面より見た平面図で、マグネ
ット６Ａの形状を示す。該マグネット６Ａは、図示のよ
うに複数のマグネット状に形成され、前記のように樹脂
材で形成された回転体５Ａ内にリング状に並べて一体に
埋め込まれている。前記マグネット６はゴム材、又は樹
脂材に鉄粉等を混合して形成したマグネットに、外部よ
り磁界発生手段を用いて磁界を形成したものを使用して
もよく、又金属製の永久磁石を用いてもよい。更に前記
マグネット６Ａは、角状、又はその他の形状を用いても
よい。FIG. 6 is another embodiment of FIG. 5, and this embodiment is also a plan view seen from the facing surface 51 of the rotating body 5A, showing the shape of the magnet 6A. The magnets 6A are formed into a plurality of magnets as shown in the drawing, and are lined up in a ring shape and integrally embedded in the rotating body 5A made of a resin material as described above. The magnet 6 may be a magnet formed by mixing iron powder or the like with a rubber material or a resin material and having a magnetic field generated from the outside by using a magnetic field generating means. Alternatively, a permanent magnet made of metal may be used. You may use. Further, the magnet 6A may have a square shape or another shape.
【００１４】[0014]
【発明の効果】以上のように本発明に於ける動圧軸受
は、特にラジアル軸受と回転自在に設けた回転体を樹脂
で形成し、別個で製作されたポリゴンミラーを強固に接
着することが可能となった。又前記回転体以外も動圧軸
受として、性能上可能な限りセラミックスより樹脂を用
いる事で部品を樹脂成形により製作が可能となり加工が
極めて容易となった。更に組み立て調整工数の低減と、
精度を向上させる事が可能となった。又回転駆動用のマ
グネットを回転体の樹脂化により一体に形成することが
可能となり、マグネットを特に強固に接着しなくても遠
心力の作用で剥がれる事が無く、製作も極めて容易であ
り、組み立て工数の低減と、特にマグネットの内蔵によ
り動圧軸受全体を小型化出来る効果がある。As described above, in the dynamic pressure bearing according to the present invention, particularly, the radial bearing and the rotating body rotatably provided are made of resin, and the separately manufactured polygon mirror is firmly bonded. It has become possible. In addition to the rotating body, as a dynamic pressure bearing, by using resin rather than ceramics as much as possible in terms of performance, parts can be manufactured by resin molding and processing becomes extremely easy. Furthermore, reduction of assembly and adjustment man-hours,
It has become possible to improve accuracy. Also, the rotation driving magnet can be integrally formed by making the rotating body resin, and even if the magnet is not firmly adhered, it will not peel off due to the action of centrifugal force, and manufacturing is extremely easy. This has the effect of reducing the number of man-hours and making the entire dynamic pressure bearing smaller by incorporating a magnet.
【図１】本発明の動圧軸受を使用した光偏向装置を示す
断面図。FIG. 1 is a sectional view showing an optical deflecting device using a dynamic pressure bearing of the present invention.
【図２】本発明の他の動圧軸受を使用した光偏向装置を
示す断面図。FIG. 2 is a sectional view showing an optical deflector using another dynamic pressure bearing of the present invention.
【図３】本発明の他の動圧軸受を使用した光偏向装置を
示す断面図。FIG. 3 is a sectional view showing an optical deflector using another dynamic pressure bearing of the present invention.
【図４】本発明の他の動圧軸受を使用した光偏向装置を
示す断面図。FIG. 4 is a sectional view showing an optical deflecting device using another dynamic pressure bearing of the present invention.
【図５】本発明の回転体のポリゴンミラーとマグネット
を示す平面図。FIG. 5 is a plan view showing a polygon mirror and a magnet of the rotating body of the present invention.
【図６】本発明の回転体のポリゴンミラーと他のマグネ
ットを示す平面図。FIG. 6 is a plan view showing a polygon mirror of a rotating body of the present invention and another magnet.
１ ポリゴンミラーの回転支持装置 ２，３ スラスト軸受 ４ ラジアル軸受 ５，５Ａ 回転体 ６，６Ａ マグネット ７ ポリゴンミラー 22，32，42 動圧発生用溝 21，31，41 案内面 51，54，55 対向面 1 Rotating support device for polygon mirror 2,3 Thrust bearing 4 Radial bearing 5,5A Rotor 6,6A Magnet 7 Polygon mirror 22,32,42 Grooves for generating dynamic pressure 21,31,41 Guide surface 51,54,55 Opposed surface
Claims (9)
に設けたスラスト軸受とを有し、前記ラジアル軸受と、
前記スラスト軸受間に回転自在に設けられた回転体を有
する動圧軸受に於いて、前記回転体と、前記ラジアル軸
受と、前記スラスト軸受が樹脂材及び／又はセラミック
ス材で形成されていることを特徴とする動圧軸受を有す
る光偏向装置。1. A radial bearing, and thrust bearings provided at both ends of the radial bearing, and the radial bearing,
In a dynamic pressure bearing having a rotating body rotatably provided between the thrust bearings, the rotating body, the radial bearing, and the thrust bearing are formed of a resin material and / or a ceramic material. An optical deflector having a characteristic dynamic pressure bearing.
受と、前記スラスト軸受をセラミックス材で各々形成し
たことを特徴とする請求項１記載の動圧軸受を有する光
偏向装置。2. The optical deflector having a dynamic pressure bearing according to claim 1, wherein the rotating body is made of a resin material, and the radial bearing and the thrust bearing are respectively made of a ceramic material.
材に、前記スラスト軸受をセラミックス材で各々形成し
たことを特徴とする請求項１記載の動圧軸受を有する光
偏向装置。3. The optical deflector having a dynamic pressure bearing according to claim 1, wherein the rotating body and the radial bearing are made of a resin material, and the thrust bearing is made of a ceramic material.
部材を接着固定したことを特徴とする請求項１記載の動
圧軸受を有する光偏向装置。4. An optical deflecting device having a dynamic pressure bearing according to claim 1, wherein an optical deflecting member is adhered and fixed to the rotating body made of the resin material.
数のスラスト軸受で保持する動圧軸受に於いて、前記回
転体と、前記スラスト軸受の内一方のスラスト軸受を樹
脂材に、ラジアル軸受と、前記スラスト軸受のうち、他
方のスラスト軸受をセラミックスで各々形成したことを
特徴とする請求項１記載の動圧軸受を有する光偏向装
置。5. A dynamic pressure bearing in which the rotating body is held by a plurality of thrust bearings via radial bearings, wherein the rotating body and one of the thrust bearings are made of a resin material, and the radial bearing is used. 2. The optical deflector having a dynamic pressure bearing according to claim 1, wherein the other thrust bearing among the thrust bearings is made of ceramics.
率−1.0〜4.0×10-5／℃、曲げ弾性率10000MPa以上の特
性を持った熱可塑性樹脂材であることを特徴とする請求
項１〜５のいずれか１項記載の動圧軸受を有する光偏向
装置。6. The resin material is a thermoplastic resin material having a water absorption rate of 0.1% or less, a linear expansion coefficient of −1.0 to 4.0 × 10 −5 / ° C., and a bending elastic modulus of 10,000 MPa or more. An optical deflector having the dynamic pressure bearing according to claim 1.
に設けたスラスト軸受とを有し、前記ラジアル軸受と、
前記スラスト軸受間に回転自在に設けられた回転体を有
する動圧軸受に於いて、樹脂材で形成された前記回転体
に、ガラス材及び／又はカーボン材が混入されているこ
とを特徴とする動圧軸受を有する光偏向装置。7. A radial bearing, and thrust bearings provided at both ends of the radial bearing, and the radial bearing,
In a dynamic pressure bearing having a rotating body rotatably provided between the thrust bearings, a glass material and / or a carbon material is mixed in the rotating body formed of a resin material. An optical deflector having a dynamic pressure bearing.
有する光偏向装置に於いて、前記回転体を樹脂材で形成
すると共に、前記回転体の一部に回転用マグネットを一
体形成したことを特徴とする動圧軸受を有する光偏向装
置。8. An optical deflector having a rotating body having a plurality of reflecting surfaces formed on a peripheral surface thereof, wherein the rotating body is made of a resin material, and a rotating magnet is integrally formed on a part of the rotating body. An optical deflecting device having a dynamic pressure bearing.
アル軸受の両端に設けたスラスト軸受とを有し、前記ラ
ジアル軸受と、前記スラスト軸受間に回転自在に設けら
れていることを特徴とする請求項８記載の動圧軸受を有
する光偏向装置。9. The rotating body has a radial bearing and thrust bearings provided at both ends of the radial bearing, and is rotatably provided between the radial bearing and the thrust bearing. An optical deflector having the dynamic pressure bearing according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23548194A JPH0893750A (en) | 1994-09-29 | 1994-09-29 | Light deflecting device having dynamic pressure bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23548194A JPH0893750A (en) | 1994-09-29 | 1994-09-29 | Light deflecting device having dynamic pressure bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0893750A true JPH0893750A (en) | 1996-04-09 |
Family
ID=16986707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23548194A Pending JPH0893750A (en) | 1994-09-29 | 1994-09-29 | Light deflecting device having dynamic pressure bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0893750A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1245989A2 (en) * | 2001-03-19 | 2002-10-02 | Konica Corporation | Optical deflection device and image forming apparatus equipped therewith. |
| US6619848B2 (en) | 2001-02-13 | 2003-09-16 | Ngk Spark Plug Co., Ltd. | Ceramic dynamic pressure bearing, motor with bearing, hard disc apparatus and polygon scanner |
| US6659647B2 (en) | 2001-03-08 | 2003-12-09 | Ngk Spark Plug Co., Ltd. | Ceramic dynamic pressure bearing, motor with bearing, hard disk device, and polygon scanner |
| JP2007162843A (en) * | 2005-12-14 | 2007-06-28 | Nidec Copal Electronics Corp | Gas dynamic pressure bearing, and motor such as polygon scanner motor provided with gas dynamic pressure bearing |
-
1994
- 1994-09-29 JP JP23548194A patent/JPH0893750A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6619848B2 (en) | 2001-02-13 | 2003-09-16 | Ngk Spark Plug Co., Ltd. | Ceramic dynamic pressure bearing, motor with bearing, hard disc apparatus and polygon scanner |
| US6659647B2 (en) | 2001-03-08 | 2003-12-09 | Ngk Spark Plug Co., Ltd. | Ceramic dynamic pressure bearing, motor with bearing, hard disk device, and polygon scanner |
| EP1245989A2 (en) * | 2001-03-19 | 2002-10-02 | Konica Corporation | Optical deflection device and image forming apparatus equipped therewith. |
| US6734892B2 (en) * | 2001-03-19 | 2004-05-11 | Konica Corporation | Optical deflection device and image forming apparatus equipped therewith |
| JP2007162843A (en) * | 2005-12-14 | 2007-06-28 | Nidec Copal Electronics Corp | Gas dynamic pressure bearing, and motor such as polygon scanner motor provided with gas dynamic pressure bearing |
| JP4686353B2 (en) * | 2005-12-14 | 2011-05-25 | 日本電産コパル電子株式会社 | Motor with gas dynamic pressure bearing |
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