JP2947872B2 - Optical dustproof device - Google Patents
Optical dustproof deviceInfo
- Publication number
- JP2947872B2 JP2947872B2 JP2121210A JP12121090A JP2947872B2 JP 2947872 B2 JP2947872 B2 JP 2947872B2 JP 2121210 A JP2121210 A JP 2121210A JP 12121090 A JP12121090 A JP 12121090A JP 2947872 B2 JP2947872 B2 JP 2947872B2
- Authority
- JP
- Japan
- Prior art keywords
- thickness
- dustproof
- mounting
- seal
- 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.)
- Expired - Fee Related
Links
Landscapes
- Control Or Security For Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は複写機、プリンタ等の画像形成装置の光学系
の光出口部に設けられる光学系防塵装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical dustproof device provided at a light outlet of an optical system of an image forming apparatus such as a copying machine or a printer.
従来の技術 複写機等の画像形成装置では一般に、光学系により画
像に対応する光ビームを発生させ、これを感光体等の潜
像形成部材に照射して潜像を形成させ、この潜像をトナ
ーにより現像して画像を形成する。この場合、感光体や
現像装置のある作像部ではトナー等の塵埃が発生するの
で、これらが光学系に侵入するのを防止する必要があ
り、光学系の光出口部には防塵部材が設けられる。この
防塵部材は塵埃により経時に汚れてくるので、一定時期
にこれを着脱して清掃等の保守を行う必要がある。2. Description of the Related Art Generally, in an image forming apparatus such as a copying machine, a light beam corresponding to an image is generated by an optical system, and the light beam is irradiated on a latent image forming member such as a photoconductor to form a latent image. An image is formed by developing with toner. In this case, dust such as toner is generated in an image forming section where the photoconductor and the developing device are provided. Therefore, it is necessary to prevent the dust from entering the optical system, and a dustproof member is provided at a light exit portion of the optical system. Can be Since the dust-proof member becomes soiled with dust over time, it is necessary to attach and detach the dust-proof member at a certain time and perform maintenance such as cleaning.
このような防塵部材としては例えば、着脱の容易なよ
うに、光透過部と把持部と着脱時の摺動案内部とを一体
的に形成し、製作の容易化、コストの低減及び耐久性の
向上を図ったものが提案されている（特開昭61−144621
号公報参照）。As such a dustproof member, for example, a light transmitting portion, a grip portion, and a sliding guide portion at the time of attachment / detachment are integrally formed so as to be easily attached / detached, thereby facilitating production, reducing cost and improving durability. An improved one has been proposed (JP-A-61-144621).
Reference).
発明が解決しようとする課題 防塵部材は前述の如く一定時期には着脱するので、光
学系本体部との間をシールするシール部材が着脱時に損
傷されやすく、経時に防塵効果を低下させる可能性があ
る。Problems to be Solved by the Invention Since the dustproof member is attached and detached at a certain time as described above, the seal member for sealing between the optical system body and the optical member is easily damaged at the time of attachment and detachment, and the dustproof effect may be reduced with time. is there.
しかしながら、従来の光学系防塵装置では、防塵部材
着脱時におけるシール部材の剥がれ等の損傷について対
策を講じたものはない。However, in the conventional optical dustproof device, no countermeasure has been taken against damage such as peeling of the seal member when attaching and detaching the dustproof member.
そこで本発明は、従来技術に於ける上記問題を解決
し、着脱時に防塵部材を損傷させず長期にわたり防塵効
果を維持することができる光学系防塵装置を提供するこ
とを課題とする。Therefore, an object of the present invention is to solve the above-mentioned problems in the prior art and to provide an optical dustproof device capable of maintaining the dustproof effect for a long time without damaging the dustproof member at the time of attachment and detachment.
課題を解決するための手段 本発明は上記課題を解決するために、請求項１の発明
は、光学系の光出口部に設けられる光学系防塵装置にお
いて、前記光出口部に設けられた開口部に挿入及び引抜
きにより着脱可能な防塵部材と、前記開口部側に形成さ
れた前記防塵部材を装着する装着部とから成り、前記防
塵部材は、前記装着部へ装着される被装着部を備えた枠
と、該枠内に取り付けられた光透過部と、前記被装着部
の一面側に固着されたシール部材とを有し、前記被装着
部はシール部材が固着された面とその反対面とで形成さ
れる厚みが挿入方向の先端側から後端側に向かって順次
大きくなっている第一厚み部と第二厚み部と第三厚み部
とこれら厚み部の間の傾斜部とを備え、前記装着部は、
前記防塵部材が前記開口部に装着されたとき、前記被装
着部の前記シール部材が固着された面と対向するシール
面部と、前記シール部材が固着された面の反対面と対向
しこれを案内するガイド部とを有し、該ガイド部は前記
シール面部に対して前記被装着部の挿入方向の先端側か
ら後端側に向かって第一間隔を形成する第一平行部と前
記第一間隔より大きい第二間隔を形成する第二平行部と
これらの間の傾斜部とを備え、前記第一間隔は前記第一
厚み部より大きく且つ該第一厚み部に前記シール部材の
厚みを加えた値より小さく、前記第二間隔は前記第二厚
み部に前記シール部材の厚みを加えた値より大きいと共
に前記第三厚み部より大きく且つ該第三厚み部に前記シ
ール部材の厚みを加えた値より小さく、前記防塵部材の
被装着部を前記装着部に装着したときに前記第一厚み部
と前記第一平行部とが接触し、且つ前記第三厚み部と前
記第二平行部とが接触することを特徴とし、請求項２の
発明は、請求項１の発明において、前記シール部材が前
記防塵部材の一面側に固着されていることに代えて、該
シール部材が前記装着部の前記シール面部側に固着され
ていることを特徴とする。Means for Solving the Problems In order to solve the above problems, the present invention is directed to an optical dustproof device provided at a light exit of an optical system, wherein an opening provided at the light exit is provided. A dustproof member that can be attached and detached by inserting and extracting the dustproof member, and a mounting portion for mounting the dustproof member formed on the opening side, wherein the dustproof member has a mounted portion mounted to the mounting portion. A frame, a light transmitting portion mounted in the frame, and a seal member fixed to one surface side of the mounted portion, wherein the mounted portion has a surface to which the seal member is fixed and an opposite surface thereof. The thickness formed in the first thickness portion, the second thickness portion and the third thickness portion and gradually inclined from the front end side to the rear end side in the insertion direction, and an inclined portion between these thickness portions, The mounting part is
When the dustproof member is mounted in the opening, the sealing surface of the mounted portion facing the surface to which the seal member is fixed, and the surface opposite to the surface to which the seal member is fixed are guided and guided. A first parallel portion that forms a first distance from a front end side to a rear end side in the insertion direction of the mounted portion with respect to the seal surface portion, and the first space. A second parallel portion forming a larger second interval and an inclined portion therebetween, wherein the first interval is larger than the first thickness portion and the thickness of the sealing member is added to the first thickness portion. Smaller than the value, the second interval is larger than the value obtained by adding the thickness of the sealing member to the second thickness portion, and is larger than the third thickness portion and the value obtained by adding the thickness of the sealing member to the third thickness portion. Smaller, the mounting portion of the dustproof member is Wherein the first thickness portion and the first parallel portion are in contact with each other when attached to the portion, and wherein the third thickness portion and the second parallel portion are in contact with each other. The invention according to claim 1 is characterized in that the seal member is fixed to the seal surface side of the mounting portion instead of being fixed to the one surface side of the dustproof member.
作用 本発明によれば、上記の如き構成にするので、防塵部
材を装着部へ挿入するときには、第二厚みとシール部材
の厚みとの合計より大きい第二間隔から第一厚み（第二
厚みより小さい）にシール部材の厚みを加えた厚みを有
する先端部を挿入することになり、挿入時に十分な間隙
が生じシール部材が装着部に当たり剥がされたりするこ
とがない。According to the present invention, since the above configuration is adopted, when the dustproof member is inserted into the mounting portion, the first thickness (from the second thickness, which is larger than the sum of the second thickness and the thickness of the seal member). In this case, a tip having a thickness obtained by adding the thickness of the seal member to the small portion is inserted, and a sufficient gap is generated at the time of insertion, so that the seal member does not hit the mounting portion and is not peeled off.
次に防塵部材の挿入中においては、第二間隔が第二厚
みとシール部材の厚みとの合計より大きいのでシール部
材がシール部と摺動することなく挿入が行われ、同様に
シール部材が剥がされたりすることがない。Next, during the insertion of the dustproof member, since the second interval is larger than the sum of the second thickness and the thickness of the seal member, the seal member is inserted without sliding with the seal portion, and the seal member is similarly peeled. It is not done.
更に防塵部材を所定位置まで挿入したときには、第二
間隔が第三厚みより大きいこと及び第一間隔が第一厚み
より大きいことにより第一厚み部及び第三厚み部をそれ
ぞれ第一間隔及び第二間隔内に挿入することができると
共に、第一間隔が第一厚みとシール部材の厚みとの合計
の厚みより小さいこと及び第二間隔が第三厚みとシール
部材の厚みとの合計の厚みより小さいことにより第一厚
み部及び第三厚み部がそれぞれ第一平行部及び第二平行
部に接触してシール部材を圧縮し、シール性を確保して
防塵部材が装着部に装着されることになる。Further, when the dustproof member is inserted to the predetermined position, the second gap is larger than the third thickness and the first gap is larger than the first thickness, so that the first thickness portion and the third thickness portion are respectively the first gap and the second thickness. While being able to be inserted in the interval, the first interval is smaller than the total thickness of the first thickness and the thickness of the sealing member, and the second interval is smaller than the total thickness of the third thickness and the thickness of the sealing member. As a result, the first thickness portion and the third thickness portion come into contact with the first parallel portion and the second parallel portion, respectively, to compress the seal member, secure the sealing performance, and attach the dustproof member to the mounting portion. .
なおそれぞれの厚み又は間隔が変化する所は傾斜部に
なっているので、防塵部材の挿入及び引抜きが滑らかに
行われる。In addition, since the place where each thickness or space | interval changes is an inclined part, insertion and extraction of a dust-proof member are performed smoothly.
実 施 例 第１図は本発明を適用することができる画像形成装置
の一例であるレーザプリンタの光学系の一例を示す。FIG. 1 shows an example of an optical system of a laser printer which is an example of an image forming apparatus to which the present invention can be applied.
書込み信号に応じてレーザ光を出射する半導体レーザ
１から出射されたレーザ光はコリメートレンズ２を経て
回転多面鏡３に達し、ここで連続的に出射方向を変えら
れて走査方向へ振られる。このレーザ光は、ｆθレンズ
４、第１ミラー５及び第２ミラー６により順次反射さ
れ、光学系出口部に設けられた防塵部材としての防塵板
７の光透過部7bを経て感光体８上を照射する。Laser light emitted from a semiconductor laser 1 that emits laser light in response to a write signal reaches a rotary polygon mirror 3 via a collimating lens 2, where the emission direction is continuously changed and swung in the scanning direction. The laser light is sequentially reflected by the fθ lens 4, the first mirror 5 and the second mirror 6, and passes through the light transmitting portion 7b of the dustproof plate 7 provided as a dustproof member provided at the exit of the optical system. Irradiate.
第２図はレーザプリンタの主要部の概略構造を示す。 FIG. 2 shows a schematic structure of a main part of the laser printer.
前述した半導体レーザ１、コリメートレンズ２、回転
多面鏡３、ｆθレンズ４、第１ミラー５、第２ミラー６
等は光学系のユニットケース９内に配設されている。The aforementioned semiconductor laser 1, collimating lens 2, rotating polygon mirror 3, fθ lens 4, first mirror 5, second mirror 6
Are disposed in the unit case 9 of the optical system.
光学系のユニットケース９のレーザ光出口部には開口
部が設けられ、開口部の両側には防塵板７を支持し且つ
着脱時にこれを案内するガイド部としてのガイド部材10
が取り付けられていて、ユニットケース９とガイド部材
10との間で防塵板７の装着部を形成している。An opening is provided at the laser light exit portion of the unit case 9 of the optical system, and a guide member 10 is provided on both sides of the opening to support the dustproof plate 7 and guide the dustproof plate 7 at the time of attachment and detachment.
Is mounted, and the unit case 9 and the guide member
A mounting portion of the dustproof plate 7 is formed between the mounting portion 10 and the mounting portion 10.
防塵板７の光透過部7bから出射されたレーザ光は帯電
チャージャ11により予め帯電された感光体８上に静電潜
像を形成させる。この静電潜像は現像装置12によってト
ナー像として現像され、図示しない搬送手段により搬送
されてくる転写紙上に転写チャージャ13によって転写さ
れ、図示しない定着装置によって定着されて画像が完成
される。防塵板７は、このような動作をなす作像部から
のトナー等の異物が光学系に侵入することを防止する。The laser light emitted from the light transmitting portion 7b of the dustproof plate 7 forms an electrostatic latent image on the photoreceptor 8 charged in advance by the charging charger 11. The electrostatic latent image is developed as a toner image by the developing device 12, transferred onto a transfer paper conveyed by a conveying means (not shown) by a transfer charger 13, and fixed by a fixing device (not shown) to complete the image. The dustproof plate 7 prevents foreign matter such as toner from the image forming unit performing such an operation from entering the optical system.
第３図は防塵板７の概略構造を示す。 FIG. 3 shows a schematic structure of the dustproof plate 7.
枠としてのホルダ7a内には、光透過率の高い例えばメ
タクリル樹脂等からなる光透過部7bが設けられている。Inside the holder 7a as a frame, there is provided a light transmitting portion 7b made of, for example, methacrylic resin having a high light transmittance.
防塵板７のユニットケース９に取り付けられる部分で
ある被装着部の一面側である上面7cには、ゴム等のシー
ル部材7dが接着等により固着されている。A sealing member 7d made of rubber or the like is fixed to an upper surface 7c, which is one surface side of the mounting portion, which is a portion of the dustproof plate 7 attached to the unit case 9, by an adhesive or the like.
又被装着部の他の一面側である下面は、ユニットケー
ス９の装着部に装着される部分において、挿入方向（第
３図において右側）の先端側から上面7cとの間で形成す
る厚みが順次大きくなっている第一厚み部7e、第二厚み
部7f、第三厚み部7g及び傾斜部7h、7iにより構成されて
いる。The lower surface, which is the other surface side of the mounting portion, has a thickness formed between the top surface 7c and the distal end in the insertion direction (the right side in FIG. 3) in the portion mounted on the mounting portion of the unit case 9. It is composed of a first thickness portion 7e, a second thickness portion 7f, a third thickness portion 7g, and inclined portions 7h and 7i that are sequentially increased.
第４図（ａ）乃至（ｆ）は、このような防塵板７をユ
ニットケース９の装着部に装着するときの状態を示す。4 (a) to 4 (f) show a state in which such a dustproof plate 7 is mounted on the mounting portion of the unit case 9. FIG.
第４図（ａ）は装着前の状態である。ガイド部材10は
図示の如く、挿入方向先端側からユニットケース９のシ
ール面部9aとの間隔d1をなす第一平行部10aと、これよ
り広い間隔d2をなす第二平行部10bと、その間の傾斜部1
0cとにより形成されている。FIG. 4A shows a state before mounting. Guide member 10 as illustrated, the first parallel portion 10a that forms the gap d 1 from the insertion direction leading end side and the seal surface portion 9a of the unit case 9, the second parallel portion 10b which forms a wider distance d 2 which, during Slope 1
0c.
そしてこの場合、防塵板７の第一、第二、第三厚み部
7e、7f、7gの厚みをそれぞれT1、T2、T3、シール部材7d
の厚みをｔとすると、 d2＞d1、T3＞T2＞T1で且つ T1＋ｔ＞d1＞T1、 T3＋ｔ＞d2＞T2＋ｔ、 d2＞T3 になるように各部の寸法を定めている。In this case, the first, second, and third thickness portions of the dustproof plate 7
7e, 7f, T 1 7g of the thickness, respectively, T 2, T 3, the sealing member 7d
When the thickness and t, d 2> d 1, T 3> T 2> and at T 1 T 1 + t> d 1> T 1, T 3 + t> d 2> T 2 + t, a d 2> T 3 The dimensions of each part are determined so as to be as follows.
同図（ｂ）は挿入時を示し、この状態ではd2＞T2＋
ｔ、従ってd2は（T1＋ｔ）より十分大きいので、シール
部材7dがシール面部9aに当たらず剥がされたり傷ついた
りすることがない。FIG. 7B shows the state at the time of insertion, and in this state, d 2 > T 2 +
t, hence d 2 is sufficiently greater than (T 1 + t), never seal member 7d is or damaged peeled without hitting the seal surface portion 9a.
同図（ｃ）及び（ｄ）は防塵部材７の挿入中の状態を
示す。d2＞T2＋ｔであるから、この状態でもシール部材
7dはシール面部9aに接触せず、従って両者間の摺動によ
り剥がれが生じない。FIGS. 9C and 9D show a state where the dustproof member 7 is being inserted. Since d 2 > T 2 + t, the sealing member is still in this state.
7d does not come into contact with the sealing surface portion 9a, and therefore does not peel off due to sliding between them.
同図（ｅ）及び（ｆ）は挿入後防塵部材７を所定位置
にセットするときの状態を示す。この時にはd1＞T1で且
つd2＞T3であるから、傾斜部7h及び7iに沿って第一及び
第三厚み部7e及び7gをそれぞれd1及びd2の間隙部に挿入
することができると共に、d1＞T1＋ｔで且つd2＜T3＋ｔ
であるから、傾斜部に沿ってシール部材7dが次第にシー
ル面部9aに押しつけられることになり、挿入時にシール
部材7dを上面7cから剥がすことなくシール性を十分確保
することができる。FIGS. 7E and 7F show a state in which the dustproof member 7 is set at a predetermined position after insertion. At this time, since d 1 > T 1 and d 2 > T 3 , the first and third thickness portions 7 e and 7 g are inserted into the gaps between d 1 and d 2 along the inclined portions 7 h and 7 i, respectively. And d 1 > T 1 + t and d 2 <T 3 + t
Therefore, the sealing member 7d is gradually pressed against the sealing surface 9a along the inclined portion, and sufficient sealing performance can be secured without peeling the sealing member 7d from the upper surface 7c during insertion.
なお以上ではシール部材7dを防塵板７に取り付けた場
合について説明したが、これを装着部であるユニットケ
ース９のシール面部9a側に取り付けることも当然可能で
あり、この場合にも同様の効果が得られる。Although the case where the sealing member 7d is attached to the dustproof plate 7 has been described above, it is naturally possible to attach this to the sealing surface 9a side of the unit case 9 which is a mounting portion, and the same effect is obtained in this case. can get.
又以上においては、レーザプリンタの光出口部に本発
明の光学系防塵装置を設けた場合について説明したが、
電子写真複写機等の他の画像形成装置の光学系に対して
も本発明を適用できることは勿論である。更に、画像形
成装置の光学系以外の装置においても、着脱を必要とす
るシール部に対しては本発明の技術を適用することが可
能である。In the above description, the case where the optical dustproof device of the present invention is provided at the light exit portion of the laser printer has been described.
Of course, the present invention can be applied to an optical system of another image forming apparatus such as an electrophotographic copying machine. Further, even in a device other than the optical system of the image forming apparatus, the technology of the present invention can be applied to a seal portion that needs to be attached and detached.
効果 以上の如く本発明によれば、簡単な構成により防塵部
材着脱時におけるシール部材の剥離、損傷を防止し、シ
ール性を維持して光学系防塵装置の耐久性を向上させる
ことができる。Effects As described above, according to the present invention, it is possible to prevent peeling and damage of the seal member at the time of attaching and detaching the dustproof member with a simple configuration, maintain the sealing performance, and improve the durability of the optical dustproof device.
第１図は実施例のレーザプリンタの光学系の斜視図、第
２図はそのレーザプリンタの主要部の説明図、第３図は
防塵部材の一例を示す斜視図、第４図（ａ）乃至（ｆ）
は防塵部材を光学系の装着部に装着する場合の説明図で
ある。 ７……防塵板（防塵部材） 7a……ホルダ（枠） 7b……光透過部 7c……上面（一面側） 7d……シール部材 7e、7f、7g、……第一、第二、第三、第三厚み部 7h、7i……傾斜部 ９……ユニットケース（光学系本体） 9a……シール面部 10……ガイド部材（ガイド部） 10a、10b……第一、第二平行部 10c……傾斜部FIG. 1 is a perspective view of an optical system of a laser printer according to an embodiment, FIG. 2 is an explanatory view of a main part of the laser printer, FIG. 3 is a perspective view showing an example of a dustproof member, and FIGS. (F)
FIG. 4 is an explanatory diagram when a dustproof member is mounted on a mounting portion of an optical system. 7: Dustproof plate (dustproof member) 7a: Holder (frame) 7b: Light transmitting portion 7c: Upper surface (one side) 7d: Sealing member 7e, 7f, 7g ... First, second, and second Third, third thickness portion 7h, 7i: inclined portion 9: unit case (optical system body) 9a: sealing surface portion 10: guide member (guide portion) 10a, 10b: first and second parallel portions 10c …… Slope
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G03G 15/04 - 15/04 120 G03G 21/00 530 - 540 G03G 21/20 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) G03G 15/04-15/04 120 G03G 21/00 530-540 G03G 21/20
Claims (2)
装置において、 前記光出口部に設けられた開口部に挿入及び引抜きによ
り着脱可能な防塵部材と、前記開口部側に形成された前
記防塵部材を装着する装着部とから成り、 前記防塵部材は、前記装着部へ装着される被装着部を備
えた枠と、該枠内に取り付けられた光透過部と、前記被
装着部の一面側に固着されたシール部材とを有し、前記
被装着部はシール部材が固着された面とその反対面とで
形成される厚みが挿入方向の先端側から後端側に向かっ
て順次大きくなっている第一厚み部と第二厚み部と第三
厚み部とこれら厚み部の間の傾斜部とを備え、 前記装着部は、前記防塵部材が前記開口部に装着された
とき、前記被装着部の前記シール部材が固着された面と
対向するシール面部と、前記シール部材が固着された面
の反対面と対向しこれを案内するガイド部とを有し、該
ガイド部は前記シール面部に対して前記被装着部の挿入
方向の先端側から後端側に向かって第一間隔を形成する
第一平行部と前記第一間隔より大きい第二間隔を形成す
る第二平行部とこれらの間の傾斜部とを備え、 前記第一間隔は前記第一厚み部より大きく且つ該第一厚
み部に前記シール部材の厚みを加えた値より小さく、前
記第二間隔は前記第二厚み部に前記シール部材の厚みを
加えた値より大きいと共に前記第三厚み部より大きく且
つ該第三厚み部に前記シール部材の厚みを加えた値より
小さく、 前記防塵部材の被装着部を前記装着部に装着したときに
前記第一厚み部と前記第一平行部とが接触し、且つ前記
第三厚み部と前記第二平行部とが接触することを特徴と
する光学系防塵装置。1. An optical dustproof device provided at a light exit portion of an optical system, comprising: a dustproof member detachable by being inserted into and pulled out from an opening provided at the light exit portion; A mounting portion for mounting the dustproof member, wherein the dustproof member includes a frame having a mounted portion mounted to the mounting portion, a light transmitting portion mounted in the frame, and a mounting portion. A sealing member fixed to one surface side, wherein the mounted portion has a thickness formed by a surface to which the sealing member is fixed and a surface opposite to the sealing member sequentially increasing from the front end side to the rear end side in the insertion direction. A first thickened portion, a second thickened portion, a third thickened portion, and an inclined portion between these thickened portions. A sealing surface portion facing the surface of the mounting portion to which the seal member is fixed; A guide portion that opposes and guides the opposite surface of the surface on which the seal member is fixed, the guide portion being from the front end side to the rear end side in the insertion direction of the mounted portion with respect to the seal surface portion. A first parallel portion forming a first interval toward the first portion, a second parallel portion forming a second interval larger than the first interval, and an inclined portion therebetween, wherein the first interval is the first thickness portion The second gap is larger than the value obtained by adding the thickness of the seal member to the first thickness portion, and the second interval is larger than the value obtained by adding the thickness of the seal member to the second thickness portion. The first thickness portion and the first parallel portion are in contact with each other when the mounting portion of the dustproof member is mounted on the mounting portion, and the third thickness portion is large and smaller than a value obtained by adding the thickness of the sealing member to the third thickness portion. And the third thickness portion and the second parallel portion are in contact with each other. An optical dustproofing device.
固着されていることに代えて、該シール部材が前記装着
部の前記シール面部側に固着されていることを特徴とす
る請求項１に記載の光学系防塵装置。2. The device according to claim 1, wherein said seal member is fixed to one side of said dustproof member, and said seal member is fixed to said seal surface of said mounting portion. 2. The optical dustproof device according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2121210A JP2947872B2 (en) | 1990-05-14 | 1990-05-14 | Optical dustproof device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2121210A JP2947872B2 (en) | 1990-05-14 | 1990-05-14 | Optical dustproof device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0418574A JPH0418574A (en) | 1992-01-22 |
| JP2947872B2 true JP2947872B2 (en) | 1999-09-13 |
Family
ID=14805605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2121210A Expired - Fee Related JP2947872B2 (en) | 1990-05-14 | 1990-05-14 | Optical dustproof device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2947872B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8345077B2 (en) | 2009-06-12 | 2013-01-01 | Ricoh Company, Limited | Write device, image forming apparatus, and open/close control method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2580858B2 (en) * | 1990-08-08 | 1997-02-12 | オムロン株式会社 | Image reading device |
| US5521681A (en) * | 1994-04-15 | 1996-05-28 | Mita Industrial Co., Ltd. | Image forming apparatus |
| JP4848709B2 (en) * | 2005-09-08 | 2011-12-28 | 富士ゼロックス株式会社 | Image forming apparatus and exposure head |
| JP6919171B2 (en) * | 2016-10-12 | 2021-08-18 | 富士フイルムビジネスイノベーション株式会社 | Exposure window parts and exposure equipment and image forming equipment using them |
| JP2018063334A (en) * | 2016-10-12 | 2018-04-19 | 富士ゼロックス株式会社 | Exposure window structure and exposure device using the same, and image forming apparatus |
-
1990
- 1990-05-14 JP JP2121210A patent/JP2947872B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8345077B2 (en) | 2009-06-12 | 2013-01-01 | Ricoh Company, Limited | Write device, image forming apparatus, and open/close control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0418574A (en) | 1992-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4468261B2 (en) | Optical scanning apparatus and image forming apparatus | |
| JP2827142B2 (en) | Photoconductor cleaning device, cleaner / toner magazine, and image forming apparatus | |
| EP0236080A2 (en) | Laser Beam printer | |
| RU2399077C2 (en) | Image forming device | |
| JP2947872B2 (en) | Optical dustproof device | |
| JP3552973B2 (en) | Photoconductor unit and image forming apparatus | |
| JP3255339B2 (en) | Image forming device | |
| JP5896631B2 (en) | Light beam emitting device, optical scanning device provided with the light beam emitting device, and image forming device provided with the optical scanning device | |
| JPH09325659A (en) | Cleaning device for image forming device | |
| JPH01100566A (en) | Image forming device | |
| JP3283664B2 (en) | Electrophotographic recording device | |
| US4774531A (en) | Recording apparatus | |
| JPH04194973A (en) | Lamp device for eliminating electrostatic charging | |
| JP3048167B2 (en) | Image forming device | |
| JPS62127786A (en) | Image forming device | |
| JPH1063166A (en) | Image forming device | |
| JPH0442847Y2 (en) | ||
| JP2977326B2 (en) | Image forming device | |
| JP2022161435A (en) | Image forming apparatus | |
| JP4098953B2 (en) | Image forming apparatus | |
| JP2849511B2 (en) | Image forming device | |
| JP3135556B2 (en) | Electrophotographic equipment | |
| JP4603313B2 (en) | Dust-proof sheet and image forming apparatus | |
| JPH0634901A (en) | Image forming device | |
| JPH05150568A (en) | Electrostatic recorder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |