JPH04288514A - Polygon scanner motor - Google Patents
Polygon scanner motorInfo
- Publication number
- JPH04288514A JPH04288514A JP41592490A JP41592490A JPH04288514A JP H04288514 A JPH04288514 A JP H04288514A JP 41592490 A JP41592490 A JP 41592490A JP 41592490 A JP41592490 A JP 41592490A JP H04288514 A JPH04288514 A JP H04288514A
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- polyhedron
- fitted
- polygon scanner
- scanner motor
- 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
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000036316 preload Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はポリゴンスキャナモータ
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to polygon scanner motors.
【０００２】0002
【従来の技術】ポリゴンスキャナモータにおいて、ロー
タマグネットをヨークに固着し、該ヨークを、回転多面
体に取付ける場合、一般に、ヨークは磁性体（つまり、
鉄系）であり、ヨークが取付けられる被取付部は非鉄系
であった。2. Description of the Related Art In a polygon scanner motor, when a rotor magnet is fixed to a yoke and the yoke is attached to a rotating polyhedron, the yoke is generally made of a magnetic material (i.e.,
The part to which the yoke was attached was non-ferrous.
【０００３】0003
【発明が解説しようとする課題】従って、回転多面体が
回転することにより、このモータが発熱し、各部材は熱
膨張し、この場合、ヨークとその被取付部とは熱膨張率
が相違するので、該ヨークと被取付部との間にひずみが
生じ、回転多面体のミラー面が変形する場合が多かった
。[Problem to be solved by the invention] Therefore, as the rotating polyhedron rotates, this motor generates heat and each member thermally expands. In this case, the yoke and the part to which it is attached have different coefficients of thermal expansion. In many cases, distortion occurs between the yoke and the attached portion, and the mirror surface of the rotating polyhedron is deformed.
【０００４】そこで、本発明では、長時間使用した場合
においても、回転多面体のミラー面が変形しないポリゴ
ンスキャナモータを提供することを目的とする。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a polygon scanner motor in which the mirror surface of a rotating polyhedron does not deform even when used for a long time.
【０００５】[0005]
【課題を解決するための手段】上述の目的を達成するた
めに、本発明に係るポリゴンスキャナモータは、回転多
面体自体又はそれと一体に連設された部材に、嵌合部を
形成すると共に、ロータマグネットを固着したヨークの
一端縁部のみを、該嵌合部に嵌合して固着したものであ
る。[Means for Solving the Problems] In order to achieve the above-mentioned object, a polygon scanner motor according to the present invention has a fitting portion formed on the rotating polyhedron itself or a member integrally connected thereto, and a fitting portion formed on the rotor. Only one end edge of the yoke to which the magnet is fixed is fitted and fixed to the fitting part.
【０００６】[0006]
【作用】ヨークは、その一端縁部のみが嵌合部に嵌合し
ているので、一端縁部以外は他の部材と非接触状態とな
り、熱膨張差による各部材の変形は極めて少ないものと
なる。[Operation] Since only one edge of the yoke fits into the fitting part, the parts other than the one edge are not in contact with other members, and deformation of each member due to differences in thermal expansion is extremely small. Become.
【０００７】[0007]
【実施例】以下、実施例を示す図面に基づいて本発明を
詳説する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on drawings showing examples.
【０００８】図１は本発明に係るポリゴンスキャナモー
タの一実施例を示し、このモータは、枢支軸１が立設さ
れたハウジング２と、該枢支軸１に軸受３を介して回転
自在に回転多面体４と、該多面体４に一体に連設されて
ボス部を形成する部材５と、該部材５に固着されるヨー
ク６と、該ヨーク６に固着される平板状のロータマグネ
ット７と、ハウジング２に設けられて該ロータマグネッ
ト７に対向する平面型のステータ８と、を備えている。FIG. 1 shows an embodiment of a polygon scanner motor according to the present invention. A rotating polyhedron 4, a member 5 integrally connected to the polyhedron 4 and forming a boss portion, a yoke 6 fixed to the member 5, and a flat rotor magnet 7 fixed to the yoke 6. , a flat stator 8 provided in the housing 2 and facing the rotor magnet 7.
【０００９】しかして、回転多面体４は、その外周が多
角形とされ、その外周面がミラー面９とされる。また、
その軸心孔に段付部１１が形成されて大径部１２が形成
され、この大径部１２に軸受３が嵌合されている。なお
、ミラー面９は鏡面仕上げされ酸化シリコン等が蒸着さ
れる。[0009] The rotating polyhedron 4 has a polygonal outer circumference, and the outer circumferential surface thereof is a mirror surface 9. Also,
A stepped portion 11 is formed in the shaft center hole to form a large diameter portion 12, and the bearing 3 is fitted into this large diameter portion 12. Note that the mirror surface 9 is mirror-finished and silicon oxide or the like is deposited thereon.
【００１０】また、ボス部を形成する部材５には、嵌合
部１３が設けられ、該嵌合部１３にヨーク６が嵌合され
る。
つまり、部材５の回転多面体４側が大径部１４とされ、
該大径部１４の端面１５乃至部材５の小径である本体部
１６外周面１６ａの端面１５側をもって該嵌合部１３と
している。そして、この嵌合部１３にヨーク６の一端縁
部６ａを嵌合させ、回転多面体４の下面１７とヨーク６
の上面１８との間に隙間１９を設けている。即ち、ヨー
ク６は中心孔２０を有する円盤体からなり、その中心孔
２０を部材５に嵌着させ、その内周縁部（つまり、一端
縁部６ａ）を嵌合部１３に嵌合させている。Further, the member 5 forming the boss portion is provided with a fitting portion 13, and the yoke 6 is fitted into the fitting portion 13. In other words, the rotating polyhedron 4 side of the member 5 is the large diameter portion 14,
The end face 15 of the large diameter portion 14 and the end face 15 side of the outer peripheral surface 16a of the main body portion 16, which is the small diameter of the member 5, are defined as the fitting portion 13. Then, one end edge 6a of the yoke 6 is fitted into this fitting part 13, and the lower surface 17 of the rotating polyhedron 4 and the yoke 6 are fitted.
A gap 19 is provided between the upper surface 18 and the upper surface 18 of the holder. That is, the yoke 6 is made of a disk having a center hole 20, and the member 5 is fitted into the center hole 20, and the inner peripheral edge (that is, one end edge 6a) is fitted into the fitting part 13. .
【００１１】しかして、部材５の内周面には、段付部２
１が形成されて大径部２２が形成される。そして、この
大径部２２に軸受２３が嵌着される。また、枢支軸１は
、大径部１ａと小径部１ｂとからなり、該小径部１ｂが
、回転多面体４の軸心孔と部材５の軸心孔とで形成され
る軸心孔２４に挿入され、該小径部１ｂに軸受３，２３
が外嵌されている。[0011]The inner peripheral surface of the member 5 has a stepped portion 2.
1 is formed, and the large diameter portion 22 is formed. A bearing 23 is fitted into this large diameter portion 22. The pivot shaft 1 is composed of a large diameter portion 1a and a small diameter portion 1b, and the small diameter portion 1b is connected to the axial hole 24 formed by the axial hole of the rotating polyhedron 4 and the axial hole of the member 5. The bearings 3, 23 are inserted into the small diameter portion 1b.
is fitted externally.
【００１２】従って、軸受３の外輪３ａが段付部１１に
当接し、軸受２３の外輪２３ａが段付部２１に当接する
と共に該軸受２３の内輪２３ｂが枢支軸１の段付部２５
に当接している。Therefore, the outer ring 3a of the bearing 3 contacts the stepped portion 11, the outer ring 23a of the bearing 23 contacts the stepped portion 21, and the inner ring 23b of the bearing 23 contacts the stepped portion 25 of the pivot shaft 1.
is in contact with.
【００１３】しかして、枢支軸１の小径部１ｂの先端部
には、軸受３の内輪３ｂを軸心方向内方へ押圧する予圧
部材２６が付設されている。A preload member 26 is attached to the tip of the small diameter portion 1b of the pivot shaft 1 to press the inner ring 3b of the bearing 3 inward in the axial direction.
【００１４】即ち、図２に示すように、予圧部材２６は
、枢支軸１の先端面に取付けられる平板状の大ワッシャ
２７と、枢支軸１の小径部１ｂに外嵌されて軸受３の内
輪３ｂの外端面２８に当接する小ワッシャ２９と、該ワ
ッシャ２７，２９間に内装される皿状バネからなる弾発
部材３０と、を備えたものである。That is, as shown in FIG. 2, the preload member 26 includes a large flat washer 27 attached to the distal end surface of the pivot shaft 1, and a large washer 27 which is fitted onto the small diameter portion 1b of the pivot shaft 1 and is attached to the bearing 3. A small washer 29 that comes into contact with the outer end surface 28 of the inner ring 3b, and a resilient member 30 made of a disc-shaped spring installed between the washers 27 and 29.
【００１５】従って、弾発部材３０の弾発力は、小ワッ
シャ２９を介して軸受３の内輪３ｂに付加されるもので
、その押圧力は、内輪３ｂに対して均一に付加され、安
定した状態で軸受３に予圧を付加することができる。な
お、３２は大ワッシャ２７を枢支軸１に固着するための
ビス等の固着具である。Therefore, the elastic force of the elastic member 30 is applied to the inner ring 3b of the bearing 3 via the small washer 29, and the pressing force is applied uniformly to the inner ring 3b, resulting in a stable A preload can be applied to the bearing 3 in this state. Note that 32 is a fixing device such as a screw for fixing the large washer 27 to the pivot shaft 1.
【００１６】また、軸受３の近傍の軸心孔２４内周面に
は、周溝３１が形成されている。従って、この場合、ワ
ッシャ２７，２９がラビリンス効果を発揮して、軸受３
のグリース等の外部への飛散を防止し、さらに、仮に、
軸受３からグリース等が飛び出した場合にも、遠心力に
て該グリース等は周溝３１に溜まり、外部へ飛散するこ
とがない。Further, a circumferential groove 31 is formed on the inner circumferential surface of the shaft hole 24 near the bearing 3. Therefore, in this case, the washers 27 and 29 exert a labyrinth effect, and the bearing 3
This prevents grease, etc. from scattering to the outside, and even if
Even if grease or the like flies out from the bearing 3, it will accumulate in the circumferential groove 31 due to centrifugal force and will not scatter to the outside.
【００１７】次に、図３は他の実施例を示し、この場合
、ヨーク６は、円筒形状とされ、その一端縁部６ａを、
部材５の嵌合部１３に嵌合している。Next, FIG. 3 shows another embodiment, in which the yoke 6 has a cylindrical shape, and one end edge 6a of the yoke 6 has a cylindrical shape.
It fits into the fitting part 13 of the member 5.
【００１８】即ち、この場合、大径部１４の外周面１４
ａ乃至回転多面体４の大径部１４側の下面１７をもって
嵌合部１３を形成している。従って、この場合、ヨーク
６の内周面３３と部材５の本体部１６の外周面１６ａと
の間に隙間部３４が形成されることになる。That is, in this case, the outer peripheral surface 14 of the large diameter portion 14
The fitting portion 13 is formed by the lower surface 17 of the rotating polyhedron 4 on the large diameter portion 14 side. Therefore, in this case, a gap 34 is formed between the inner circumferential surface 33 of the yoke 6 and the outer circumferential surface 16a of the main body portion 16 of the member 5.
【００１９】また、この場合、ハウジング３５には、側
壁３６が立設され、該側壁３６の内周面３７にステータ
８が付設され、それに対向して、ヨーク６の外周面３９
にロータマグネット７が固着されている。なお、この場
合のステータ８は、周方向に沿って複数のティースが配
設されたステータコア８ａと、該コア８ａのティースに
巻設されるコイル８ｂとからなる。Further, in this case, a side wall 36 is provided upright on the housing 35, a stator 8 is attached to an inner circumferential surface 37 of the side wall 36, and an outer circumferential surface 39 of the yoke 6 is disposed opposite to the stator 8.
A rotor magnet 7 is fixed to the rotor magnet 7. Note that the stator 8 in this case includes a stator core 8a in which a plurality of teeth are arranged along the circumferential direction, and a coil 8b wound around the teeth of the core 8a.
【００２０】従って、この場合も図１に示すモータと同
様、ヨーク６はその一端縁部６ａのみが、嵌合部１３に
嵌合されるので、熱膨張率の差によるミラー面９の変形
がなくなる。Therefore, in this case as well, like the motor shown in FIG. 1, only one end edge 6a of the yoke 6 is fitted into the fitting part 13, so that deformation of the mirror surface 9 due to the difference in coefficient of thermal expansion is prevented. It disappears.
【００２１】また、図４はさらに別の実施例を示し、こ
の場合、回転多面体４には、嵌合部を有さないボス部４
０が一体に連設され、このボス部４０の軸心孔と回転多
面体４の軸心孔とで、枢支軸１の小径部１ｂが軸受３，
２３を介して挿入される軸心孔２４を形成している。FIG. 4 shows yet another embodiment, in which the rotating polyhedron 4 has a boss portion 4 having no fitting portion.
0 are integrally connected, and the small diameter portion 1b of the pivot shaft 1 is connected to the bearing 3,
A shaft center hole 24 is formed into which the shaft hole 24 is inserted through the hole 23 .
【００２２】しかして、この場合、回転多面体４のミラ
ー面９側の下面１７には、垂下壁４１が垂設され、該垂
下壁４１の外周面４１ａ乃至垂下壁４１近傍の下面１７
をもって嵌合部１３としている。即ち、回転多面体４自
体に嵌合部１３が形成されたことになる。In this case, a hanging wall 41 is provided vertically on the lower surface 17 of the rotating polyhedron 4 on the mirror surface 9 side, and the lower surface 17 in the vicinity of the hanging wall 41 from the outer circumferential surface 41a of the hanging wall 41
This is the fitting part 13. That is, the fitting portion 13 is formed in the rotating polyhedron 4 itself.
【００２３】そして、円筒形状とされるヨーク６の内周
面３３にはロータマグネット７が固着され、これに対向
して、ハウジング２には、円筒部４２が設けられ、この
円筒部４２にステータ８が外嵌されている。A rotor magnet 7 is fixed to the inner peripheral surface 33 of the cylindrical yoke 6. Opposed to this, the housing 2 is provided with a cylindrical portion 42, and a stator is attached to the cylindrical portion 42. 8 is fitted externally.
【００２４】従って、この実施例においても、ヨーク６
の一端縁部６ａのみが嵌合部１３に嵌合しているので、
熱膨張率の差によるミラー面９のひずみが生じない。Therefore, in this embodiment as well, the yoke 6
Since only one end edge 6a is fitted into the fitting part 13,
Distortion of the mirror surface 9 due to differences in thermal expansion coefficients does not occur.
【００２５】しかして、上述の各実施例によれば、回転
多面体４の内周面に直接軸受３の外輪３ａ外周面が当接
するものであるので、部品点数が少なくなると共に、多
面体４の取付精度の向上を図ることができる。According to each of the embodiments described above, the outer circumferential surface of the outer ring 3a of the bearing 3 is in direct contact with the inner circumferential surface of the rotating polyhedron 4, so the number of parts is reduced and the mounting of the polyhedron 4 is simplified. Accuracy can be improved.
【００２６】なお、本発明は上述の実施例に限定されず
、本発明の要旨を逸脱しない範囲で設計変更自由であり
、例えば、軸固定型とせず、軸回転型とするも好ましく
、また、図３と図４に示すモータにおいても、図１に示
すモータと同様、予圧部材２６及び周溝３１を設けるも
自由である。Note that the present invention is not limited to the above-described embodiments, and the design may be changed without departing from the gist of the present invention. For example, it is preferable to use a rotating shaft type instead of a fixed shaft type; In the motors shown in FIGS. 3 and 4 as well, the preload member 26 and the circumferential groove 31 may be provided as in the motor shown in FIG.
【００２７】[0027]
【発明の効果】本発明は上述の如く構成されているので
、次に記載する効果を奏する。[Effects of the Invention] Since the present invention is constructed as described above, it produces the following effects.
【００２８】長時間使用した場合においても、ヨーク６
と回転多面体４との熱膨張率差によるミラー面９の変形
が生じることがなく、このモータは常に精度よく機能す
ることができる。[0028] Even when used for a long time, the yoke 6
The mirror surface 9 is not deformed due to the difference in thermal expansion coefficient between the rotary polyhedron 4 and the rotary polyhedron 4, and this motor can always function with high precision.
【図１】本発明の一実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】要部拡大断面図である。FIG. 2 is an enlarged sectional view of main parts.
【図３】他の実施例を示す断面図である。FIG. 3 is a sectional view showing another embodiment.
【図４】さらに別の実施例を示す断面図である。FIG. 4 is a sectional view showing still another embodiment.
４ 回転多面体 ５ 部材 ６ ヨーク ６ａ 一端縁部 ７ ロータマグネット １３ 嵌合部 4 Rotating polyhedron 5 Components 6 York 6a One end edge 7 Rotor magnet 13 Fitting part
Claims (1)
設された部材５に、嵌合部１３を形成すると共に、ロー
タマグネット７を固着したヨーク６の一端縁部６ａのみ
を、該嵌合部１３に嵌合して固着したことを特徴とする
ポリゴンスキャナモータ。1. A fitting portion 13 is formed on the rotating polyhedron 4 itself or a member 5 integrally connected thereto, and only one end edge 6a of the yoke 6 to which the rotor magnet 7 is fixed is attached to the fitting portion. A polygon scanner motor characterized in that it is fitted and fixed to a polygon scanner motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP41592490A JP3002551B2 (en) | 1990-12-28 | 1990-12-28 | Polygon scanner motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP41592490A JP3002551B2 (en) | 1990-12-28 | 1990-12-28 | Polygon scanner motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04288514A true JPH04288514A (en) | 1992-10-13 |
| JP3002551B2 JP3002551B2 (en) | 2000-01-24 |
Family
ID=18524191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP41592490A Expired - Fee Related JP3002551B2 (en) | 1990-12-28 | 1990-12-28 | Polygon scanner motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3002551B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8223455B2 (en) | 2006-03-10 | 2012-07-17 | Nidec Corporation | Rotor hub, motor, and disk driving device |
-
1990
- 1990-12-28 JP JP41592490A patent/JP3002551B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8223455B2 (en) | 2006-03-10 | 2012-07-17 | Nidec Corporation | Rotor hub, motor, and disk driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3002551B2 (en) | 2000-01-24 |
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