JPH0229802Y2 - - Google Patents
Info
- Publication number
- JPH0229802Y2 JPH0229802Y2 JP17160183U JP17160183U JPH0229802Y2 JP H0229802 Y2 JPH0229802 Y2 JP H0229802Y2 JP 17160183 U JP17160183 U JP 17160183U JP 17160183 U JP17160183 U JP 17160183U JP H0229802 Y2 JPH0229802 Y2 JP H0229802Y2
- Authority
- JP
- Japan
- Prior art keywords
- polygon mirror
- motor
- rotating polygon
- window glass
- mirror
- 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.)
- Expired
Links
- 238000009423 ventilation Methods 0.000 claims description 6
- 239000005357 flat glass Substances 0.000 description 7
- 238000011109 contamination Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Motor Or Generator Frames (AREA)
Description
【考案の詳細な説明】
本考案は、回転多面鏡モータの内面曇り防止構
造に関するものである。[Detailed Description of the Invention] The present invention relates to a structure for preventing internal fogging of a rotating polygon mirror motor.
一般に、回転多面鏡モータ（レーザ光のスキヤ
ン〔走査〕の為に用いられるもの）の構造には、
大きく分けて２通りがある。１つは従来技術（第
１図）のように、レーザ光の入出射側口に窓ガラ
スを設け密閉的な構造にしたもの（防塵を目的）
と、もう１つは、入出射口に何も付けない開放的
構造のものである。塵、異物混入によるミラー面
反射率の低下やベアリングへの異物混入による回
転異常を防止する目的で多くは前者の密閉的構造
が一般的であり、又信頼性の点で優れている。 In general, the structure of a rotating polygon mirror motor (used for scanning laser light) is as follows:
There are two main ways. One is the conventional technology (Fig. 1), which has a window glass at the entrance and exit side of the laser beam to create an airtight structure (for dustproofing purposes).
The other type has an open structure in which nothing is attached to the entrance and exit ports. The former type of sealed structure is common in order to prevent a decrease in the reflectance of the mirror surface due to contamination of dust or foreign matter, or abnormal rotation due to contamination of the bearing with foreign matter, and is superior in terms of reliability.
しかし、第１図に示す密閉的構造においては、
高湿度環境に長期間放置されると、使用に際して
モータの温度が上昇するに伴ないモータ内の吸湿
性の高い部品から保管期間中に吸つた水分が蒸発
し窓ガラス内面やミラー表面に曇り（結露）を生
じさせ、かつ一旦曇りが生じると、なかなか消失
しないという欠点がある。 However, in the closed structure shown in Figure 1,
If the motor is left in a high humidity environment for a long period of time, as the temperature of the motor rises during use, the moisture absorbed during storage from the highly hygroscopic parts inside the motor will evaporate, causing fogging (fog) on the inside of the window glass and mirror surface. It also has the disadvantage that once cloudiness occurs, it does not disappear easily.
本考案は、上記した従来技術の欠点をなくすと
共に併せて従来技術の持つ防塵機能を損わないよ
うにすることである。 The present invention aims to eliminate the above-mentioned drawbacks of the prior art and at the same time not to impair the dustproof function of the prior art.
本考案は、モータを開放的構造にすれば曇りが
発生しない、または、一時的に曇りが発生しても
短時間の動作によつて消える事に着目し、モータ
の一部に通気孔を設け、かつ防塵機能を損わない
ようにする為、この通気孔にフイルタを取付ける
ようしたものである。 This invention focuses on the fact that if the motor has an open structure, fogging will not occur, or even if fogging occurs temporarily, it will disappear after a short period of operation, and a ventilation hole is provided in a part of the motor. , and in order not to impair the dustproof function, a filter is attached to this ventilation hole.
本考案の実施例を第３図および第４図に示す。
第３図は本考案によるミラーキヤツプの断面構造
図を示す。第３図において５は、入射側窓ガラス
を、６は出射側窓ガラスを、１０はフイルタを示
す。第４図は、本考案による改良された回転多面
鏡モータの外観図を示す。図において、１はミラ
ーキヤツプ（上側キヤツプ）、２はケーシング、
３はエンドキヤツプ（下側キヤツプ）を、４，５
は窓ガラスを、１０はフイルタを示す。フイルタ
１０の目の粗さは、レーザプリンタにおいて主な
塵の要因となるトナーの粒径（平均粒径12μm）
を考慮し、決定している。なお、フイルタの数は
１コに限るものではない。 An embodiment of the invention is shown in FIGS. 3 and 4.
FIG. 3 shows a sectional view of the mirror cap according to the present invention. In FIG. 3, 5 indicates an entrance side window glass, 6 indicates an exit side window glass, and 10 indicates a filter. FIG. 4 shows an external view of the improved rotary polygon mirror motor according to the present invention. In the figure, 1 is the mirror cap (upper cap), 2 is the casing,
3 is the end cap (lower cap), 4,5
10 indicates a window glass, and 10 indicates a filter. The coarseness of the filter 10 corresponds to the particle size of toner (average particle size 12 μm), which is the main cause of dust in laser printers.
The decision has been taken into consideration. Note that the number of filters is not limited to one.
また、通気孔の取付位置および大きさ形状は、
回転多面鏡の構造から決定されるべきもので、第
３図は一実施例を示したに過ぎない。 In addition, the installation position, size and shape of the ventilation hole are as follows:
This should be determined based on the structure of the rotating polygon mirror, and FIG. 3 only shows one embodiment.
本考案により、回転多面鏡モータが高湿度環境
に長期間さらされても、通気孔を設けたので、回
転多面鏡内に高湿の空気が封じ込められることが
なくなり、使用に際して窓ガラス、ミラーの曇り
を防止できる、または万一曇りが発生しても速や
かに除去することができる。 With this invention, even if the rotating polygon mirror motor is exposed to a high-humidity environment for a long period of time, the ventilation holes are provided so that high-humidity air will not be trapped inside the rotating polygon mirror. It is possible to prevent fogging, or even if fogging occurs, it can be quickly removed.
第１図は本考案の従来技術例を示す斜視図、第
２図は、モータ内の回転多面鏡付軸を示す斜視図
である。第３図は本考案ミラーキヤツプの横断面
図、第４図は本案実施例の斜視図である。
１はミラーキヤツプ、２はケーシング、３はエ
ンドキヤツプ、４は入射側窓ガラス、５は出射
側、窓ガラス、６は回転多面鏡、７はナツト、８
は軸、９はロータ、１０はフイルタ、である。
FIG. 1 is a perspective view showing a prior art example of the present invention, and FIG. 2 is a perspective view showing a shaft with a rotating polygon mirror in a motor. FIG. 3 is a cross-sectional view of the mirror cap of the present invention, and FIG. 4 is a perspective view of an embodiment of the present invention. 1 is a mirror cap, 2 is a casing, 3 is an end cap, 4 is an incident side window glass, 5 is an exit side window glass, 6 is a rotating polygon mirror, 7 is a nut, 8
is a shaft, 9 is a rotor, and 10 is a filter.
Claims (1)
容するとともに、走査光の入射出窓を有する回転
多面鏡モータにおいて、モータのハウジングに１
コ又は複数個の通気孔を設け、この通気孔にフイ
ルタを設けてなる回転多面鏡モータ。 In a rotary polygon mirror motor that houses a rotating polygon mirror and a drive motor in a housing and has an entrance/exit window for scanning light, a
A rotary polygon mirror motor having one or more ventilation holes and a filter provided in the ventilation holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17160183U JPS6079252U (en) | 1983-11-05 | 1983-11-05 | Rotating polygon mirror motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17160183U JPS6079252U (en) | 1983-11-05 | 1983-11-05 | Rotating polygon mirror motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6079252U JPS6079252U (en) | 1985-06-01 |
| JPH0229802Y2 true JPH0229802Y2 (en) | 1990-08-10 |
Family
ID=30374295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17160183U Granted JPS6079252U (en) | 1983-11-05 | 1983-11-05 | Rotating polygon mirror motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6079252U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5006129B2 (en) * | 2007-07-19 | 2012-08-22 | 株式会社ニデック | Scanning laser ophthalmoscope |
| JP5223722B2 (en) * | 2009-02-23 | 2013-06-26 | 株式会社リコー | Optical scanning apparatus and image forming apparatus |
-
1983
- 1983-11-05 JP JP17160183U patent/JPS6079252U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6079252U (en) | 1985-06-01 |
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