JPH09159955A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH09159955A JPH09159955A JP31505895A JP31505895A JPH09159955A JP H09159955 A JPH09159955 A JP H09159955A JP 31505895 A JP31505895 A JP 31505895A JP 31505895 A JP31505895 A JP 31505895A JP H09159955 A JPH09159955 A JP H09159955A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- optical system
- image forming
- vibration
- forming apparatus
- 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
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光束を光偏向器に
より偏向し被走査媒体上を走査する画像形成装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus for scanning a medium to be scanned by deflecting a light beam by an optical deflector.
【０００２】[0002]
【従来の技術】従来から、画像形成装置はファクシミリ
やコンピュータ等の出力機器として用いられ、特に最近
では高速かつ高解像度なものに対する要求が高まりつつ
ある。2. Description of the Related Art Conventionally, an image forming apparatus has been used as an output device such as a facsimile or a computer, and recently, a demand for high speed and high resolution has been increasing.
【０００３】以下に従来の画像形成装置について説明す
る。図４は従来の画像形成装置の概略斜視図、図５は従
来の画像形成装置の断面図である。A conventional image forming apparatus will be described below. FIG. 4 is a schematic perspective view of a conventional image forming apparatus, and FIG. 5 is a sectional view of the conventional image forming apparatus.
【０００４】図４及び図５において、光源１より出射さ
れた光束は第１結像光学系（シリンドリカルレンズな
ど）２により光偏向器であるポリゴンミラー３の反射面
４の近傍に線像として結像される。ポリゴンミラー３は
モータ５に回転軸、ベアリング等（図示せず）を介して
回転可能に支持され、その回転によって線像位置近傍に
反射面４を順次配置する。次に、反射面４により偏向さ
れた光束は、第２結像光学系（ｆθレンズ）６を経て被
走査媒体７の表面上に点像８として結像され、かつ、ポ
リゴンミラー３の回転に応じて点像８は走査線９上を走
査する。そして、光源１から第２結像光学系６に至る全
ての光学系が一つの筺体１０上に固定されている。ここ
で、点像８の走査線９上の走査を主走査と称し、主走査
と直交する方向すなわち被走査媒体７の移動方向を副走
査と称する。In FIGS. 4 and 5, the light beam emitted from the light source 1 is formed as a line image near the reflecting surface 4 of the polygon mirror 3 which is an optical deflector by the first image forming optical system (such as a cylindrical lens) 2. To be imaged. The polygon mirror 3 is rotatably supported by a motor 5 via a rotary shaft, a bearing and the like (not shown), and the rotation causes the reflecting surface 4 to be sequentially arranged near the line image position. Next, the light beam deflected by the reflecting surface 4 is imaged as a point image 8 on the surface of the medium to be scanned 7 through the second imaging optical system (fθ lens) 6 and the polygon mirror 3 is rotated. In response, the point image 8 scans on the scanning line 9. Then, all the optical systems from the light source 1 to the second imaging optical system 6 are fixed on one housing 10. Here, the scanning of the point image 8 on the scanning line 9 is called main scanning, and the direction orthogonal to the main scanning, that is, the moving direction of the medium 7 to be scanned is called sub-scanning.
【０００５】一方、反射面４の面倒れにより点像８が副
走査方向へずれないように、第２結像光学系６の副走査
方向断面の結像関係は、反射面４と点像８とが光学的に
共役な関係に保たれている。On the other hand, in order to prevent the point image 8 from being displaced in the sub-scanning direction due to the surface tilt of the reflecting surface 4, the image forming relationship of the cross section in the sub-scanning direction of the second imaging optical system 6 is the reflecting surface 4 and the point image 8. And are kept in an optically conjugate relationship.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら上記従来
の構成では、モータ５が高速回転すると筺体１０を介し
て、光源１から第２結像光学系６に至る全ての光学系が
振動するので、被走査媒体７の表面上に結像された点像
８が振動し画像品質が著しく劣化し、高速と高解像度が
両立しないという問題点を有していた。However, in the above-mentioned conventional configuration, when the motor 5 rotates at a high speed, all the optical systems from the light source 1 to the second imaging optical system 6 vibrate via the housing 10, so that There is a problem that the point image 8 formed on the surface of the scanning medium 7 vibrates and the image quality is remarkably deteriorated, and high speed and high resolution are not compatible with each other.
【０００７】本発明は上記従来の問題点を解決するもの
で、被走査媒体７の表面上に結像された点像８の振動を
低減し、高速と高解像度を両立させることができる画像
形成装置を提供することを目的としている。The present invention solves the above-mentioned conventional problems, and reduces the vibration of the point image 8 formed on the surface of the medium 7 to be scanned, thereby forming an image capable of achieving both high speed and high resolution. The purpose is to provide a device.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
に本発明は、光源から出射される光束を偏向する偏向手
段を支持する偏向手段支持部材と、偏向手段で偏向され
た光束を被走査媒体上に結像させる光学系を支持する光
学系支持部材と、偏向手段支持部材と光学系支持部材と
を接続する防振部材とを備えたもので、この構成により
被走査媒体の表面上に結像された点像の振動を低減し、
高速と高解像度を両立させることができる画像形成装置
が得られる。In order to solve the above problems, the present invention provides a deflecting means supporting member for supporting a deflecting means for deflecting a light beam emitted from a light source, and a light beam deflected by the deflecting means to be scanned. The optical system supporting member for supporting the optical system for forming an image on the medium, and the vibration isolating member for connecting the deflecting means supporting member and the optical system supporting member are provided. Reduces the vibration of the formed point image,
An image forming apparatus capable of achieving both high speed and high resolution can be obtained.
【０００９】[0009]
【発明の実施の形態】本発明の請求項１に記載の発明
は、光源から出射される光束を偏向する偏向手段と、こ
の偏向手段で偏向された光束を被走査媒体上に結像させ
る光学系とを有する画像形成装置において、偏向手段を
支持する偏向手段支持部材と、光学系を支持する光学系
支持部材と、これら偏向手段支持部材と光学系支持部材
とを接続する防振部材とを備えたものであり、被走査媒
体の表面上に結像された点像の振動を低減し、高速と高
解像度を両立させることができるという作用を有する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is an optical system for deflecting a light beam emitted from a light source, and an optical system for forming an image of the light beam deflected by the deflecting device on a medium to be scanned. And an optical system supporting member for supporting the optical system, and a vibration isolating member for connecting the deflecting means supporting member and the optical system supporting member. It is provided, and has an effect of reducing the vibration of the point image formed on the surface of the medium to be scanned and achieving both high speed and high resolution.
【００１０】以下、本発明の実施の形態について説明す
る。図１は本発明の一実施の形態による画像形成装置の
概略斜視図、図２は本発明の一実施の形態による画像形
成装置の断面図、図３は本発明の一実施の形態による画
像形成装置の締結部の断面図である。なお、従来の画像
形成装置と同一の構成には同一符号を付して説明を省略
する。Hereinafter, embodiments of the present invention will be described. 1 is a schematic perspective view of an image forming apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view of an image forming apparatus according to an embodiment of the present invention, and FIG. 3 is an image forming according to an embodiment of the present invention. It is sectional drawing of the fastening part of an apparatus. The same components as those of the conventional image forming apparatus are designated by the same reference numerals and the description thereof will be omitted.
【００１１】図１及び図２に示すように本発明では、モ
ータ５は筺体１０に直接固定されておらず筺体１１（例
えば、プリンタ本体の筺体）に固定されている。そし
て、筺体１０と筺体１１は防振部材を介して位置決め及
び弾力的な締結を行う締結手段１２により固定されてい
る。従って、モータ５の高速回転による振動が光源１か
ら第２結像光学系６に至る光学系（ポリゴンミラー３を
除く）に伝わらない。As shown in FIGS. 1 and 2, in the present invention, the motor 5 is not directly fixed to the housing 10 but is fixed to the housing 11 (for example, the housing of the printer body). The housing 10 and the housing 11 are fixed by a fastening means 12 that positions and elastically fastens them via a vibration-proof member. Therefore, the vibration caused by the high speed rotation of the motor 5 is not transmitted to the optical system (excluding the polygon mirror 3) from the light source 1 to the second imaging optical system 6.
【００１２】次に、筺体１０と筺体１１の締結手段１２
について説明する。図３において、１３は筺体１０より
突出しているシャフトで、筺体１１との位置決めと締結
を同時に行うものである。シャフト１３は筺体１０より
筺体１１の直前までは棒形状をしており、筺体１１側の
先端形状は筺体１１側に開いた円錐形状部１３Ａと円盤
形状部１３Ｂになっている。一方、筺体１１のシャフト
１３と向かい合う部分は筺体１０側に開いた円錐形状部
１４となっている。そして、シャフト１３の円錐形状部
１３Ａと筺体１１の円錐形状部１４の斜面同士は互いに
平行になっており、その斜面に当接するように、樹脂系
の材料からなる球形の防振部材１５が挟まっている。こ
の構成により、筺体１０と筺体１１とは位置決めされ
る。なお、前記の斜面の角度は約４５度が好ましい。Next, a fastening means 12 for connecting the casing 10 and the casing 11 together.
Will be described. In FIG. 3, reference numeral 13 denotes a shaft projecting from the housing 10, which simultaneously positions and fastens the housing 11. The shaft 13 has a rod shape from the housing 10 to a position immediately before the housing 11, and the tip shape on the housing 11 side is a conical portion 13A and a disk-shaped portion 13B that are open to the housing 11 side. On the other hand, the portion of the housing 11 that faces the shaft 13 is a conical portion 14 that opens toward the housing 10. The conical portions 13A of the shaft 13 and the conical portions 14 of the housing 11 are parallel to each other in slopes, and the spherical vibration-damping member 15 made of a resin-based material is sandwiched so as to contact the slopes. ing. With this configuration, the housing 10 and the housing 11 are positioned. The angle of the slope is preferably about 45 degrees.
【００１３】また、円盤形状部１３Ｂと筺体１１より突
出しかつ筺体１１と平行な板状部材１６の間に、弾性的
な防振部材１７を挟み、筺体１１と板状部材１６とをネ
ジ１８により締結している。Further, an elastic vibration-proof member 17 is sandwiched between the disk-shaped portion 13B and a plate-shaped member 16 protruding from the housing 11 and parallel to the housing 11, and the housing 11 and the plate-shaped member 16 are screwed together. It is concluded.
【００１４】この時、円盤形状部１３Ｂの強度は板状部
材１６より強く、ネジ１８の締結により防振部材１７を
介して掛かる力により変形しない強度になっている。そ
して、円盤形状部１３Ｂのネジ１８が通り抜ける部分は
ネジ１８が接触しないように穴を大きくし、モータ５の
振動が筺体１０に直接伝わらないようにしている。At this time, the strength of the disk-shaped portion 13B is stronger than that of the plate-shaped member 16 and is so strong that it is not deformed by the force applied through the vibration isolating member 17 by fastening the screw 18. A large hole is formed in the disk-shaped portion 13B through which the screw 18 passes so that the screw 18 does not come into contact with the disk-shaped portion 13B so that the vibration of the motor 5 is not directly transmitted to the housing 10.
【００１５】以上の構成により、筺体１０と筺体１１と
が防振部材１７を介して位置決め及び弾力的な締結をす
ることができる。With the above structure, the housing 10 and the housing 11 can be positioned and elastically fastened via the vibration isolating member 17.
【００１６】[0016]
【発明の効果】以上のように本発明によれば、被走査媒
体の表面上に結像された点像の振動を低減し、高速と高
解像度を両立させることができる。As described above, according to the present invention, it is possible to reduce the vibration of the point image formed on the surface of the medium to be scanned and to achieve both high speed and high resolution.
【図１】本発明の一実施の形態による画像形成装置の概
略斜視図FIG. 1 is a schematic perspective view of an image forming apparatus according to an embodiment of the present invention.
【図２】本発明の一実施の形態による画像形成装置の断
面図FIG. 2 is a sectional view of an image forming apparatus according to an embodiment of the present invention.
【図３】本発明の一実施の形態による画像形成装置の締
結部の断面図FIG. 3 is a sectional view of a fastening portion of the image forming apparatus according to the embodiment of the present invention.
【図４】従来の画像形成装置の概略斜視図FIG. 4 is a schematic perspective view of a conventional image forming apparatus.
【図５】従来の画像形成装置の断面図FIG. 5 is a sectional view of a conventional image forming apparatus.
１ 光源 ２ 第１結像光学系 ３ ポリゴンミラー ４ 反射面 ５ モータ ６ 第２結像光学系 ７ 被走査媒体 ８ 点像 ９ 走査線 １０ 筺体 １１ 筺体 １２ 締結手段 １３ シャフト １３Ａ 円錐形状部 １３Ｂ 円盤形状部 １４ 円錐形状部 １５ 防振部材 １６ 板状部材 １７ 防振部材 １８ ネジ 1 Light Source 2 First Imaging Optical System 3 Polygon Mirror 4 Reflecting Surface 5 Motor 6 Second Imaging Optical System 7 Scanned Medium 8 Point Image 9 Scanning Line 10 Housing 11 Housing 12 Fastening Means 13 Shaft 13A Cone Shaped Section 13B Disk Shape Part 14 Conical part 15 Anti-vibration member 16 Plate-like member 17 Anti-vibration member 18 Screw
───────────────────────────────────────────────────── フロントページの続き (72)発明者 野田 和彦 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 津留 哲浩 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Noda 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Tetsuhiro Tsuru, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.
Claims (1)
段と、前記偏向手段で偏向された光束を被走査媒体上に
結像させる光学系とを有する画像形成装置において、前
記偏向手段を支持する偏向手段支持部材と、前記光学系
を支持する光学系支持部材と、前記偏向手段支持部材と
前記光学系支持部材とを接続する防振部材とを備えたこ
とを特徴とする画像形成装置。1. An image forming apparatus having a deflecting means for deflecting a light beam emitted from a light source, and an optical system for forming an image of the light beam deflected by the deflecting means on a medium to be scanned. An image forming apparatus comprising: a deflecting unit supporting member, an optical system supporting member that supports the optical system, and a vibration isolating member that connects the deflecting unit supporting member and the optical system supporting member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31505895A JPH09159955A (en) | 1995-12-04 | 1995-12-04 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31505895A JPH09159955A (en) | 1995-12-04 | 1995-12-04 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09159955A true JPH09159955A (en) | 1997-06-20 |
Family
ID=18060937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31505895A Pending JPH09159955A (en) | 1995-12-04 | 1995-12-04 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09159955A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012008233A (en) * | 2010-06-23 | 2012-01-12 | Ricoh Co Ltd | Optical scanning device and image forming apparatus |
| US11237385B2 (en) | 2019-04-10 | 2022-02-01 | Konica Minolta, Inc. | Optical writing device and image forming apparatus |
-
1995
- 1995-12-04 JP JP31505895A patent/JPH09159955A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012008233A (en) * | 2010-06-23 | 2012-01-12 | Ricoh Co Ltd | Optical scanning device and image forming apparatus |
| US8754918B2 (en) | 2010-06-23 | 2014-06-17 | Ricoh Company, Ltd. | Optical scanner and image forming apparatus including same |
| US11237385B2 (en) | 2019-04-10 | 2022-02-01 | Konica Minolta, Inc. | Optical writing device and image forming apparatus |
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