JP6552171B2 - Scanning optical apparatus, image forming apparatus - Google Patents

Scanning optical apparatus, image forming apparatus Download PDF

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JP6552171B2
JP6552171B2 JP2014184514A JP2014184514A JP6552171B2 JP 6552171 B2 JP6552171 B2 JP 6552171B2 JP 2014184514 A JP2014184514 A JP 2014184514A JP 2014184514 A JP2014184514 A JP 2014184514A JP 6552171 B2 JP6552171 B2 JP 6552171B2
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optical box
lid member
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polygon mirror
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充広 太田
充広 太田
章宏 福冨
章宏 福冨
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Description

本発明は、走査光学装置、走査光学装置を備える画像形成装置に関するものである。   The present invention relates to a scanning optical device and an image forming apparatus provided with the scanning optical device.

走査光学装置として、例えば、特許文献１に示すようなものが提案されている。特許文献１に示す走査光学装置においては、まず画像信号に応じて光源ユニットから光変調され出射したレーザビームを偏向手段としての回転多面鏡によって周期的に偏向させている。そして、回転多面鏡に偏向されたレーザビームを、ｆθ特性を有する結像光学素子によって感光ドラム等の被走査体上にスポット状に集束させ、静電潜像の形成を行っている。ここで、回転多面鏡や結像光学素子などの各光学部品は光学箱に収容されており、光学箱の開口は蓋部材によって閉塞されている。また、光学箱には、回転多面鏡を高速回転駆動するための駆動源としてのモータが設けられている。   As a scanning optical device, for example, a device as shown in Patent Document 1 has been proposed. In the scanning optical device disclosed in Patent Document 1, first, a laser beam that is light-modulated and emitted from a light source unit according to an image signal is periodically deflected by a rotating polygon mirror as a deflecting unit. Then, an electrostatic latent image is formed by focusing the laser beam deflected by the rotating polygon mirror into a spot shape on a scan target such as a photosensitive drum by an imaging optical element having an fθ characteristic. Here, each optical component such as a rotating polygon mirror and an imaging optical element is accommodated in an optical box, and the opening of the optical box is closed by a lid member. Further, the optical box is provided with a motor as a drive source for driving the rotary polygon mirror to rotate at high speed.

ここで、モータによって回転多面鏡を高速回転駆動させた時に、モータの回転振動によって光学箱が振動してしまう場合がある。光学箱の振動は蓋部材に伝わり、蓋部材の振動によって走査光学装置の稼動音が大きくなってしまうという問題がある。   Here, when the rotary polygon mirror is driven to rotate at a high speed by the motor, the optical box may vibrate due to the rotational vibration of the motor. The vibration of the optical box is transmitted to the lid member, and there is a problem that the operating sound of the scanning optical device becomes loud due to the vibration of the lid member.

そこで、特許文献１では、蓋部材の共振周波数をモータの回転周波数から回避するために、共振回避部材を取り付ける構成を採用している。その結果、蓋部材の共振周波数を変えることができ、蓋部材の共振による稼働音を抑えることが可能となる。また、特許文献２では、回転多面鏡を駆動するモータの軸の下端を光学箱に圧入し、他端を蓋部材とビス固定することによって蓋部材の振動を低減させている。   Therefore, Patent Document 1 adopts a configuration in which a resonance avoidance member is attached in order to avoid the resonance frequency of the lid member from the rotation frequency of the motor. As a result, the resonance frequency of the lid member can be changed, and operating noise due to resonance of the lid member can be suppressed. In Patent Document 2, the vibration of the lid member is reduced by press-fitting the lower end of the shaft of the motor that drives the rotary polygon mirror into the optical box and fixing the other end to the lid member with screws.

特開２００３−１５０７１号公報Japanese Patent Application Laid-Open No. 2003-15071 特開２００１−２５５４８７号公報JP 2001-255487 A

しかしながら、特許文献１の技術においては、蓋部材に共振回避部材を取り付ける必要があり、部品点数が増え、組立工数が増えるという課題がある。また、特許文献２に開示される構成のように、光学箱の開口の縁全周と蓋部材とが当接する場合、長時間の使用により走査光学装置の温度が上昇して光学箱または蓋が変形し、光学箱の開口の縁全周において蓋部材との間に隙間が生じる場合がある。その隙間で蓋部材が局所的に振動すると、蓋部材と光学箱との衝突に伴う音が発生し、稼動音が大きくなるという課題がある。   However, in the technique of Patent Document 1, it is necessary to attach a resonance avoiding member to the lid member, and there is a problem that the number of parts increases and the number of assembly steps increases. Further, as in the configuration disclosed in Patent Document 2, when the entire periphery of the opening of the optical box abuts on the lid member, the temperature of the scanning optical device rises due to long-term use, and the optical box or the lid It may be deformed and a gap may be formed between the optical box and the lid member around the entire periphery of the opening. When the lid member locally vibrates in the gap, there is a problem that a sound is generated due to the collision between the lid member and the optical box, and the operating noise is increased.

そこで、本発明は、光学箱を備える走査光学装置において、光学箱を覆う蓋部材の振動による稼動音を低減することを目的とする。   Therefore, an object of the present invention is to reduce operating noise due to vibration of a lid member covering an optical box in a scanning optical device including the optical box.

上記目的を達成するため本発明に係る走査光学装置は、
光源と、回転駆動することで前記光源から照射されるレーザ光を偏向する回転多面鏡と、前記回転多面鏡を回転駆動させる駆動部と、を収容し、画像形成装置の装置本体に対して固定される光学箱と、
前記光学箱に設けられた支持部に支持され、前記光学箱を覆う蓋部材と、
を有する走査光学装置であって、
前記支持部は、前記回転多面鏡の回転軸方向から見て、前記光学箱が前記装置本体に固定される前記光学箱の底面の四隅に設けられた固定部の近傍に設けられており、
前記支持部は、前記蓋部材が前記光学箱を覆った状態において前記蓋部材に向けて突き出るように前記光学箱に設けられた複数の突起であって、前記突起の先端面で前記蓋部材を支持する複数の突起であり、
前記蓋部材は、前記蓋部材が前記光学箱を覆った状態において前記突起が嵌る穴を有し、前記穴の底面において前記突起の前記先端面に載せられていることを特徴とする走査光学装置。
上記目的を達成するため本発明に係る走査光学装置は、
光源と、回転駆動することで前記光源から照射されるレーザ光を偏向する回転多面鏡と、前記回転多面鏡を回転駆動させる駆動部と、を収容し、画像形成装置の装置本体に対して固定される光学箱と、
前記光学箱に設けられた支持部に支持され、前記光学箱を覆う蓋部材と、
を有する走査光学装置であって、
前記支持部は、前記回転多面鏡の回転軸方向から見て、前記光学箱が前記装置本体に固定される前記光学箱の底面の四隅に設けられた固定部の近傍に設けられており、
前記支持部は、前記蓋部材が前記光学箱を覆った状態において前記蓋部材に向けて突き出るように前記光学箱に設けられた複数の突起であって、前記突起の先端面で前記蓋部材を支持する複数の突起であり、
前記蓋部材は、前記蓋部材が前記光学箱を覆った状態において前記複数の突起のうち少なくとも２つの突起がそれぞれ嵌る２つの穴を有し、前記穴の底面において前記突起の前記先端面に載せられていることを特徴とする。
上記目的を達成するため本発明に係る走査光学装置は、
光源と、回転駆動することで前記光源から照射されるレーザ光を偏向する回転多面鏡と、前記回転多面鏡を回転駆動させる駆動部と、を収容し、画像形成装置の装置本体に対して固定される光学箱と、
前記光学箱に設けられた支持部に支持され、前記光学箱を覆う蓋部材と、
を有する走査光学装置であって、
前記支持部は、前記回転多面鏡の回転軸方向から見て、前記光学箱が前記装置本体に固定される前記光学箱の底面の四隅に設けられた固定部の近傍に設けられており、
前記蓋部材は、前記蓋部材が前記光学箱を覆った状態において前記光学箱に向けて突き出た複数の突起を有し、
前記支持部は、前記突起の先端面に当接することで前記蓋部材を支持し、
前記光学箱は、前記支持部に当接した前記突起が嵌る穴を有し、前記穴の底面において前記突起の前記先端面に当接することを特徴とする。
上記目的を達成するため本発明に係る走査光学装置は、
光源と、回転駆動することで前記光源から照射されるレーザ光を偏向する回転多面鏡と、前記回転多面鏡を回転駆動させる駆動部と、を収容し、画像形成装置の装置本体に対して固定される光学箱と、
前記光学箱に設けられた支持部に支持され、前記光学箱を覆う蓋部材と、を有する走査光学装置であって、
前記支持部は、前記回転多面鏡の回転軸方向から見て、前記光学箱が前記装置本体に固定される前記光学箱の底面の四隅に設けられた固定部の近傍に設けられており、
前記蓋部材は、前記蓋部材が前記光学箱を覆った状態において前記光学箱に向けて突き出た複数の突起を有し、
前記支持部は、前記突起の先端面に当接することで前記蓋部材を支持し、
前記光学箱は、前記支持部に当接した前記複数の突起のうち少なくとも２つの突起が嵌る少なくとも２つの穴を有し、前記穴の底面において前記突起の前記先端面に当接することを特徴とする。 In order to achieve the above object, a scanning optical device according to the present invention includes:
A light source, a rotary polygon mirror that deflects laser light emitted from the light source by being driven to rotate, and a drive unit that rotates the rotary polygon mirror are accommodated and fixed to the apparatus main body of the image forming apparatus. With optical box,
A lid member supported by a support provided on the optical box and covering the optical box;
A scanning optical device having
The support portion is provided in the vicinity of the fixing portions provided at the four corners of the bottom surface of the optical box where the optical box is fixed to the apparatus main body as seen from the rotation axis direction of the rotary polygon mirror.
Said support portion, it plurality of projections der provided in a state in which the cover member covers the optical box to the optical box so as to protrude toward the cover member, the cover member in the distal end surface of the projection a plurality of protrusions der supporting the is,
The lid member, the lid member have a hole in which the projection is fitted in a state of covering the optical box, the scanning optical device according to claim Rukoto at the bottom of the hole it has been placed on the tip surface of the projection .
In order to achieve the above object, a scanning optical device according to the present invention includes:
A light source, a rotary polygon mirror that deflects laser light emitted from the light source by being driven to rotate, and a drive unit that rotates the rotary polygon mirror are accommodated and fixed to the apparatus main body of the image forming apparatus. An optical box to be
A lid member that is supported by a support provided in the optical box and covers the optical box;
A scanning optical device having
The support portion is provided in the vicinity of the fixing portions provided at the four corners of the bottom surface of the optical box where the optical box is fixed to the apparatus main body as seen from the rotation axis direction of the rotary polygon mirror.
Said support portion, it plurality of projections der provided in a state in which the cover member covers the optical box to the optical box so as to protrude toward the cover member, the cover member in the distal end surface of the projection a plurality of protrusions der supporting the is,
The lid member, wherein in a state where the lid member covers the optical box plurality of at least two projections of the projections have a two holes fitted respectively, placed on the front end surface of the projection at the bottom of the hole It is characterized that you have.
In order to achieve the above object, a scanning optical device according to the present invention includes:
A light source, a rotary polygon mirror that deflects laser light emitted from the light source by being driven to rotate, and a drive unit that rotates the rotary polygon mirror are accommodated and fixed to the apparatus main body of the image forming apparatus. With optical box,
A lid member that is supported by a support provided in the optical box and covers the optical box;
A scanning optical device having
The support portion is provided in the vicinity of the fixing portions provided at the four corners of the bottom surface of the optical box where the optical box is fixed to the apparatus main body as seen from the rotation axis direction of the rotary polygon mirror.
The lid member has a plurality of protrusions protruding toward the optical box in a state where the lid member covers the optical box,
The support portion supports the lid member by abutting on a tip end surface of the protrusion,
The optical box may have a hole contact with the projections on the support section is fitted, characterized in that it abuts against the front end surface of the projection at the bottom of the hole.
In order to achieve the above object, a scanning optical device according to the present invention includes:
A light source, a rotary polygon mirror that deflects a laser beam emitted from the light source by driving to rotate, and a drive unit to drive the rotary polygon mirror to rotate are accommodated and fixed to the main body of the image forming apparatus With optical box,
A scanning optical device having a lid member supported by a support portion provided in the optical box and covering the optical box,
The support portion is provided in the vicinity of the fixing portions provided at the four corners of the bottom surface of the optical box where the optical box is fixed to the apparatus main body as seen from the rotation axis direction of the rotary polygon mirror.
The lid member has a plurality of protrusions protruding toward the optical box in a state where the lid member covers the optical box,
The support portion supports the lid member by abutting on a tip end surface of the protrusion,
Characterized in that said optical box, the one of the plurality of projections in contact with the support portion have at least two holes at least two projections are fitted, it abuts against the front end surface of the projection at the bottom of the hole I assume.

また、本発明に係る画像形成装置は、
上記走査光学装置と、
前記走査光学装置から照射されるレーザ光により表面に静電潜像が形成される像担持体と、
を有し、
前記静電潜像を現像することで形成された現像剤像を転写材に転写し、転写材上に画像形成を行うことを特徴とする。 An image forming apparatus according to the present invention is
The scanning optical device;
An image carrier on which an electrostatic latent image is formed on the surface by laser light emitted from the scanning optical device;
Have
A developer image formed by developing the electrostatic latent image is transferred to a transfer material, and an image is formed on the transfer material.

本発明によれば、光学箱を備える走査光学装置において、光学箱を覆う蓋部材の振動による稼動音を低減することができる。   ADVANTAGE OF THE INVENTION According to this invention, in the scanning optical apparatus provided with an optical box, the operating sound by vibration of the cover member which covers an optical box can be reduced.

本実施例に係る画像形成装置の構成を示す概略断面図FIG. 1 is a schematic cross-sectional view showing the configuration of an image forming apparatus according to the present embodiment. 実施例１の走査光学装置を上方から見た斜視図The perspective view which looked at the scanning optical device of Example 1 from the upper part 実施例１の走査光学装置を下方から見た斜視図The perspective view which looked at the scanning optical device of Example 1 from the lower part 実施例１の走査光学装置を示す上面図Top view showing the scanning optical device of Example 1 実施例１の走査光学装置を示す斜視図A perspective view showing a scanning optical device of Example 1 実施例１の走査光学装置を示す斜視図A perspective view showing a scanning optical device of Example 1 実施例１の走査光学装置の断面図Sectional view of the scanning optical device of Example 1 変形例の走査光学装置を示す斜視図The perspective view which shows the scanning optical device of the modification 実施例２の走査光学装置を示す上面図Top view showing a scanning optical device of Example 2 実施例２の走査光学装置を示す斜視図The perspective view which shows the scanning optical device of Example 2 実施例２の走査光学装置を示す斜視図The perspective view which shows the scanning optical device of Example 2 実施例２の走査光学装置の断面図Sectional view of the scanning optical device of Example 2

以下に図面を参照して、この発明を実施するための形態を、実施例に基づいて例示的に詳しく説明する。ただし、この実施の形態に記載されている構成部品の寸法、材質、形状それらの相対配置などは、発明が適用される装置の構成や各種条件により適宜変更されるべきものである。すなわち、この発明の範囲を以下の実施の形態に限定する趣旨のものではない。   Hereinafter, with reference to the drawings, modes for carrying out the present invention will be exemplarily described in detail based on examples. However, the dimensions, materials, shapes, and relative arrangements of the components described in this embodiment should be appropriately changed according to the configuration of the apparatus to which the invention is applied and various conditions. That is, it is not intended to limit the scope of the present invention to the following embodiments.

まず、図１を参照して、本発明の実施例（以下、本実施例）に係る画像形成装置の概略について説明する。図１は、本実施例に係る画像形成装置の構成を示す概略断面図である。図１に示すように、本実施例に係る画像形成装置の装置本体１は、紙等の転写材Ｐを積載する給紙部４、給紙ローラ５、転写ローラ６、定着器７等を有している。また、転写ローラ６に対向する位置に、画像形成プロセスを行うためのプロセス手段を有するプロセスカートリッジ８が、画像形成装置の装置本体１に着脱可能に設けられている。さらに、画像形成装置の装置本体１内には、プロセスカートリッジ８の上部に走査光学装置２が設けられている。走査光学装置２は、画像形成装置１の枠体の一部である光学台３に固定して設置されている。なお、本実施例において、装置本体１とは、画像形成装置のうちプロセスカートリッジ８を除いた部分をいう。   First, an outline of an image forming apparatus according to an embodiment of the present invention (hereinafter, this embodiment) will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view showing the configuration of the image forming apparatus according to the present embodiment. As shown in FIG. 1, the apparatus main body 1 of the image forming apparatus according to the present embodiment includes a paper feeding unit 4 on which a transfer material P such as paper is stacked, a paper feeding roller 5, a transfer roller 6, a fixing device 7, and the like. doing. A process cartridge 8 having process means for performing an image forming process is detachably provided at a position facing the transfer roller 6 in the apparatus main body 1 of the image forming apparatus. Further, a scanning optical device 2 is provided above the process cartridge 8 in the apparatus main body 1 of the image forming apparatus. The scanning optical device 2 is fixedly installed on an optical bench 3 that is a part of the frame of the image forming apparatus 1. In this embodiment, the apparatus main body 1 refers to a portion of the image forming apparatus excluding the process cartridge 8.

プロセスカートリッジ８は、プロセス手段として、像担持体としての感光ドラム９、帯電器８ａ、現像ローラ８ｂを有している。感光ドラム９の表面は、帯電器８ａによって所
定の電位に均一に帯電される。そして、帯電された感光ドラム９の表面に対して、走査光学装置２がレーザ光Ｌを走査することで、感光ドラム９の表面上に静電潜像が形成される。その後、現像ローラ８ｂによって感光ドラム９の表面上に形成された静電潜像にトナーが供給され、現像剤像としてのトナー像が形成される。 The process cartridge 8 includes a photosensitive drum 9 as an image carrier, a charger 8a, and a developing roller 8b as process means. The surface of the photosensitive drum 9 is uniformly charged to a predetermined potential by the charger 8a. Then, the scanning optical device 2 scans the surface of the charged photosensitive drum 9 with the laser light L, whereby an electrostatic latent image is formed on the surface of the photosensitive drum 9. Thereafter, toner is supplied to the electrostatic latent image formed on the surface of the photosensitive drum 9 by the developing roller 8b, and a toner image as a developer image is formed.

一方、転写材Ｐは、給紙ローラ５によって給紙部４から転写ローラ６へと給送され、転写ローラ６によって感光ドラム９上に形成されたトナー像が転写される。その後、定着器７において、転写材Ｐ上（転写材上）のトナー像は、熱と圧力によって転写材Ｐ上に定着される。トナー像が定着された転写材Ｐは、排紙ローラ１０によって装置本体１の外部へと排出される。   On the other hand, the transfer material P is fed from the paper feed unit 4 to the transfer roller 6 by the paper feed roller 5, and the toner image formed on the photosensitive drum 9 is transferred by the transfer roller 6. Thereafter, in the fixing device 7, the toner image on the transfer material P (on the transfer material) is fixed on the transfer material P by heat and pressure. The transfer material P on which the toner image is fixed is discharged to the outside of the apparatus main body 1 by the paper discharge roller 10.

（実施例１）
次に、図２〜図７を参照して、本発明の実施例１の走査光学装置の詳細について説明する。図２は、実施例１の走査光学装置を上方（回転多面鏡２２の回転軸方向）から見た斜視図であって、蓋で開口を塞いでいない状態を示す図である。ここで、上方とは光学箱の開口側であり、下方とは光学箱の底部側である。 Example 1
Next, details of the scanning optical apparatus according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a perspective view of the scanning optical apparatus according to the first exemplary embodiment as viewed from above (in the direction of the rotation axis of the rotary polygon mirror 22), and illustrates a state where the opening is not blocked by the lid. Here, the upper side is the opening side of the optical box, and the lower side is the bottom side of the optical box.

図２に示すように、走査光学装置２は、光源ユニット１１、シリンドリカルレンズ１５、光偏向器１８、ｆθレンズ１９、折り返しミラー２０、回転多面鏡２２等を有しており、それら各光学部品を光学箱１３に収容して構成される。光源ユニット１１から出射されたレーザビームＬ１は、シリンドリカルレンズ１５によって副走査方向のみに集光される。さらに、レーザビームＬ１は、黒色樹脂から成る光学箱１３に形成される光学絞り１４によって所定のビーム径に制限され、回転多面鏡２２の反射面１７に主走査方向に長い線状に集光される。   As shown in FIG. 2, the scanning optical device 2 has a light source unit 11, a cylindrical lens 15, a light deflector 18, an fθ lens 19, a folding mirror 20, a rotating polygon mirror 22 and the like, The optical box 13 is configured to be accommodated. The laser beam L1 emitted from the light source unit 11 is condensed only in the sub-scanning direction by the cylindrical lens 15. Further, the laser beam L1 is limited to a predetermined beam diameter by the optical diaphragm 14 formed in the optical box 13 made of black resin, and is focused on the reflecting surface 17 of the rotating polygon mirror 22 in a long linear shape in the main scanning direction. Ru.

回転多面鏡２２は、駆動部としてのモータを備える光偏向器１８によって回転駆動され、反射面１７に照射されたレーザビームＬ１を偏向する。偏向されたレーザビームＬ２は、ｆθレンズ１９を通過し、長尺の折り返しミラー２０で反射され、感光ドラム９上に集光、走査される。その結果、帯電器８ａによって表面が帯電されていた感光ドラム９上に静電潜像が形成される。   The rotary polygon mirror 22 is rotationally driven by the light deflector 18 including a motor as a drive unit, and deflects the laser beam L1 irradiated to the reflecting surface 17. The deflected laser beam L2 passes through the fθ lens 19, is reflected by the long folding mirror 20, and is condensed and scanned on the photosensitive drum 9. As a result, an electrostatic latent image is formed on the photosensitive drum 9 whose surface is charged by the charger 8a.

ここで、図２に示すように、光学箱１３は、底部（底面）と、底部の周りを囲むよう底面から立設された側壁を備える。光学箱１３の底部に対向する側は開口している。この開口は、樹脂や板金からなる蓋部材１２によって覆われて閉塞される。各光学部品は、光学箱１３の底部側に備えられており、蓋部材１２によって開口が閉塞されることで、光学箱１３の内部に外部から塵埃等が侵入するのが抑制される。また、後述するが、実施例１において、支持部としての突起１３３は側壁側に設けられている。   Here, as shown in FIG. 2, the optical box 13 includes a bottom portion (bottom surface) and side walls erected from the bottom surface so as to surround the bottom portion. The side facing the bottom of the optical box 13 is open. This opening is covered and closed by a lid member 12 made of resin or sheet metal. Each optical component is provided on the bottom side of the optical box 13, and the opening thereof is closed by the lid member 12, whereby intrusion of dust or the like from the outside into the inside of the optical box 13 is suppressed. Moreover, although mentioned later, in Example 1, the protrusion 133 as a support part is provided in the side wall side.

さらに、図３を参照して、走査光学装置２を画像形成装置１の光学台３に固定する方法について説明する。図３は、実施例１の走査光学装置を下方から見た斜視図である。   Further, a method of fixing the scanning optical device 2 to the optical bench 3 of the image forming apparatus 1 will be described with reference to FIG. FIG. 3 is a perspective view of the scanning optical device of Example 1 as viewed from below.

図３に示すように、光学箱１３の底部の裏面には、孔４２ａ、４２ｂ、４２ｃ、４２ｄの周囲に形成される取付基準面１３１ａ、１３１ｂ、１３１ｃ、１３１ｄが設けられている。それらに対向する位置において、光学台３には、ビス孔３１ａ、３１ｂ、３１ｃ、３１ｄが設けられている。また、光学箱１３の底部の裏面には、ピン１３２ａ、１３２ｂが設けられている。それらに対向する位置において、光学台３には、丸穴３２ａ、長丸穴３２ｂが設けられている。   As shown in FIG. 3, attachment reference planes 131 a, 131 b, 131 c, 131 d formed around the holes 42 a, 42 b, 42 c, 42 d are provided on the back surface of the bottom of the optical box 13. Screw holes 31a, 31b, 31c and 31d are provided in the optical bench 3 at positions facing them. Further, on the back surface of the bottom of the optical box 13, pins 132a and 132b are provided. At positions facing them, the optical bench 3 is provided with a round hole 32a and an oblong hole 32b.

光学箱１３のピン１３２ａ、１３２ｂを、光学台３の丸穴３２ａ、長丸穴３２ｂに対してそれぞれ嵌合することによって、光学台３に対する光学箱１３の位置決めがされる。位
置決めがされた状態で、ビス４１ａ、４１ｂ、４１ｃ、４１ｄを孔４２ａ、４２ｂ、４２ｃ、４２ｄを介して、ビス孔３１ａ、３１ｂ、３１ｃ、３１ｄに締結する。このようにビス締結によって、光学箱１３は光学台３に対して固定される。光学箱１３と装置本体１が備える光学台３とが固定される箇所を以下、固定部とする。 The pins 132a and 132b of the optical box 13 are fitted into the round hole 32a and the oblong hole 32b of the optical bench 3, respectively, so that the optical box 13 is positioned with respect to the optical bench 3. The screws 41a, 41b, 41c, and 41d are fastened to the screw holes 31a, 31b, 31c, and 31d through the holes 42a, 42b, 42c, and 42d in the positioned state. Thus, the optical box 13 is fixed to the optical bench 3 by screw fastening. Hereinafter, a portion where the optical box 13 and the optical bench 3 provided in the apparatus main body 1 are fixed will be referred to as a fixed portion.

さらに、図４〜図７を参照して、光学箱への蓋部材の組み付けについて説明する。図４は、実施例１の走査光学装置を示す上面図である。図５は、実施例１の走査光学装置を示す斜視図であって、蓋部材を組み付ける前の状態を示す図である。図６は、実施例１の走査光学装置を示す斜視図であって、蓋部材を組み付けた状態を示す図である。図７は、実施例１の走査光学装置の断面図であって、蓋部材を組み付けた状態を示す図である。なお、説明の便宜上、図４において蓋部材は不図示とした。   Furthermore, with reference to FIGS. 4-7, the assembly | attachment of the cover member to an optical box is demonstrated. FIG. 4 is a top view showing the scanning optical apparatus of the first embodiment. FIG. 5 is a perspective view illustrating the scanning optical device according to the first embodiment, and illustrates a state before the lid member is assembled. FIG. 6 is a perspective view illustrating the scanning optical device according to the first embodiment, and illustrates a state in which a lid member is assembled. FIG. 7 is a cross-sectional view of the scanning optical device according to the first embodiment, illustrating a state where a lid member is assembled. In addition, the cover member was not shown in FIG. 4 for convenience of explanation.

図４、図５に示すように、光学箱１３は、蓋部材１２に対向する位置に円柱状の支持部としての突起１３３ａ、１３３ｂ、１３３ｃ、１３３ｄ（複数の突起）を有し、側壁において外側に突出する被係止部１３４ａ、１３４ｂ、１３４ｃ、１３４ｄを有している。一方、蓋部材１２は、図５に示すように、光学箱１３に対向する位置に基準丸穴１２２ｂ、基準長丸穴１２２ｄを有し、被係止部１３４ａ、１３４ｂ、１３４ｃ、１３４ｄにそれぞれ係止可能な係止部１２３ａ、１２３ｂ、１２３ｃ、１２３ｄを有している。   As shown in FIGS. 4 and 5, the optical box 13 has projections 133a, 133b, 133c, and 133d (plurality of projections) as cylindrical support portions at positions facing the lid member 12, and the outer side wall There are to-be-latched portions 134a, 134b, 134c, and 134d protruding in the direction. On the other hand, as shown in FIG. 5, the cover member 12 has a reference round hole 122b and a reference long round hole 122d at a position facing the optical box 13, and is engaged with the engaged portions 134a, 134b, 134c and 134d. It has the latching | locking part 123a, 123b, 123c, 123d which can be stopped.

突起１３３ｂ、１３３ｄは、蓋部材１２が光学箱１３を覆った状態において、基準丸穴１２２ｂ、基準長丸穴１２２ｄにそれぞれ嵌合する位置にある。光学箱１３の突起１３３ｂ、１３３ｄが、蓋部材１２の基準丸穴１２２ｂ、基準長丸穴１２２ｄに嵌合することで、蓋部材１２の平面１２５（図５中のクロスハッチング部）に平行な方向における位置が決まる。また、突起１３３ａ、１３３ｂ、１３３ｃ、１３３ｄに平面１２５を当接させることによって、突起１３３ａ、１３３ｂ、１３３ｃ、１３３ｄが光学箱１３を支持し、蓋部材１２の平面１２５に垂直な方向における位置が決まる。   The protrusions 133b and 133d are in positions where they are fitted into the reference round hole 122b and the reference long circular hole 122d, respectively, in a state where the cover member 12 covers the optical box 13. The protrusions 133 b and 133 d of the optical box 13 are fitted in the reference round holes 122 b and the reference long round holes 122 d of the lid member 12, whereby a direction parallel to the plane 125 (cross hatched portion in FIG. 5) of the lid member 12. The position in Further, by bringing the flat surface 125 into contact with the protrusions 133a, 133b, 133c, and 133d, the protrusions 133a, 133b, 133c, and 133d support the optical box 13, and the position in the direction perpendicular to the flat surface 125 of the lid member 12 is determined. .

実施例１において、蓋部材１２と光学箱１３とは、突起１３３ａ、１３３ｂ、１３３ｃ、１３３ｄ以外の部分で当接しない構成となっている。すなわち、蓋部材１２は突起１３３ａ、１３３ｂ、１３３ｃ、１３３ｄのみによって光学箱１３に支持されている。   In the first embodiment, the lid member 12 and the optical box 13 are configured not to contact at portions other than the protrusions 133a, 133b, 133c, and 133d. That is, the lid member 12 is supported by the optical box 13 only by the protrusions 133a, 133b, 133c, and 133d.

また、図６に示すように、蓋部材１２が光学箱１３を覆った状態において、蓋部材１２の係止部１２３ａ、１２３ｂ、１２３ｃ、１２３ｄが、光学箱１３の被係止部１３４ａ、１３４ｂ、１３４ｃ、１３４ｄにそれぞれ係止する。係止部１２３と被係止部１３４とは、蓋部材１２が光学箱１３を覆った状態で通常は当接していない。係止部１２３と被係止部１３４は、走査光学装置２に衝撃が加わった場合、蓋部材１２が光学箱１３から外れることを防止するために設けられるものである。   Further, as shown in FIG. 6, in the state where the lid member 12 covers the optical box 13, the locking portions 123 a, 123 b, 123 c, 123 d of the lid member 12 are engaged with the locked portions 134 a, 134 b, It locks to 134c and 134d respectively. The locking portion 123 and the locked portion 134 are not normally in contact with each other when the lid member 12 covers the optical box 13. The locking portion 123 and the locked portion 134 are provided to prevent the lid member 12 from being detached from the optical box 13 when an impact is applied to the scanning optical device 2.

また、実施例１においては、図７の断面図に示すように、蓋部材１２と光学箱１３との間には突起１３３の高さ分の隙間である隙間ｅ１が形成される。隙間ｅ１は、０．５ｍｍ程度である。また、蓋部材１２には二重壁１２１（第１壁部１２１ｂ、第２壁部１２１ａ）が形成されている。第１壁部１２１ｂは、光学箱１３の側壁１３５に沿って側壁１３５よりも光学箱１３の外側において、側壁１３５の縁部１３５ａよりも下方に延びて形成される。第２壁部１２１ａは、光学箱１３の側壁１３５に沿って側壁１３５よりも光学箱１３の内側において、第１壁部１２１ｂと共に側壁１３５を挟み込むように側壁１３５の縁部１３５ａよりも下方に延びて形成される。   Further, in the first embodiment, as shown in the cross-sectional view of FIG. 7, a gap e1 which is a gap corresponding to the height of the protrusion 133 is formed between the lid member 12 and the optical box 13. The clearance e1 is about 0.5 mm. Further, the lid member 12 is formed with a double wall 121 (first wall portion 121b, second wall portion 121a). The first wall 121 b is formed along the side wall 135 of the optical box 13 so as to extend below the edge 135 a of the side wall 135 on the outer side of the optical box 13 than the side wall 135. The second wall 121a extends below the edge 135a of the side wall 135 so as to sandwich the side wall 135 together with the first wall 121b on the inner side of the side wall 135 along the side wall 135 of the optical box 13 with the first wall 121b. It is formed.

蓋部材１２の上面からの距離である二重壁１２１の高さＨ１は、蓋部材１２と光学箱１３の隙間ｅ１よりも十分に大きく、５．０ｍｍ程度である。なお、光学箱１３の外周の側壁１３５と、蓋部材１２の二重壁１２１とは互いに接触しておらず、外周の側壁１３５の
縁部１３５ａと蓋部材１２との間にも同様に隙間ｅ１が形成される構成とした。このように、側壁１３５と蓋部材１２との間には隙間が形成されており、光学箱１３の内部と外部が完全に塞がれる構成とはなっていない。しかし、図７に示すように、実施例１においては、蓋部材１２が二重壁構造となっているため、光学箱１３内へ外部から塵埃が入りにくい構成となっている。 The height H1 of the double wall 121, which is the distance from the upper surface of the lid member 12, is sufficiently larger than the gap e1 between the lid member 12 and the optical box 13, and is about 5.0 mm. The side wall 135 on the outer periphery of the optical box 13 and the double wall 121 of the lid member 12 do not contact each other, and the gap e1 is similarly formed between the edge 135a of the side wall 135 on the outer periphery and the lid member 12 Was formed. Thus, a gap is formed between the side wall 135 and the lid member 12, and the inside and the outside of the optical box 13 are not completely closed. However, as shown in FIG. 7, in the first embodiment, the lid member 12 has a double wall structure, so that it is difficult for dust to enter the optical box 13 from the outside.

次に、実施例１の特徴について説明する。上述したように、実施例１においては、光学箱１３と蓋部材１２は、突起１３３ａ、１３３ｂ、１３３ｃ、１３３ｄでのみ当接しており、光学箱１３の振動は、突起１３３ａ、１３３ｂ、１３３ｃ、１３３ｄを介してのみ、蓋部材１２へと伝わる。   Next, the features of the first embodiment will be described. As described above, in the first embodiment, the optical box 13 and the cover member 12 are in contact with each other only at the protrusions 133a, 133b, 133c, and 133d, and the vibration of the optical box 13 is performed by the protrusions 133a, 133b, 133c, and 133d. Only to the cover member 12.

光学箱１３は、取付基準面１３１ａ、１３１ｂ、１３１ｃ、１３１ｄで装置本体１が備える光学台３にビス締結され、固定されている。この取付基準面１３１ａ、１３１ｂ、１３１ｃ、１３１ｄ近傍（すなわち、固定部近傍）においては、光偏向器１８の備える駆動部としてのモータの回転駆動に伴う光学箱１３の振動は小さい。   The optical box 13 is screwed and fixed to the optical bench 3 included in the apparatus main body 1 at the mounting reference surfaces 131a, 131b, 131c, and 131d. In the vicinity of the attachment reference surfaces 131a, 131b, 131c, and 131d (that is, in the vicinity of the fixed portion), the vibration of the optical box 13 due to the rotational drive of the motor as the drive portion provided in the optical deflector 18 is small.

実施例１においては、比較的振動の小さい取付基準面１３１ａ、１３１ｂ、１３１ｃ、１３１ｄ近傍に、蓋部材１２と接触する突起１３３ａ、１３３ｂ、１３３ｃ、１３３ｄを設けた。このような構成を採用することで、光学箱１３から突起１３３ａ、１３３ｂ、１３３ｃ、１３３ｄを介して蓋部材１２へと伝わる振動を抑えることができ、蓋部材１２の振動による稼動音を低減することができる。
特に、取付基準面１３１ａ〜ｄが光学箱１３の底部側、突起１３３ａ〜ｄと蓋部材１２との接触点は光学箱の開口側に設けられている場合は、回転多面鏡２２の回転軸方向から見て、取付基準面１３１ａ〜ｄの近傍に突起１３３ａ〜ｄが設けられていればよい。 In the first embodiment, the protrusions 133a, 133b, 133c, and 133d that contact the lid member 12 are provided in the vicinity of the attachment reference surfaces 131a, 131b, 131c, and 131d that have relatively small vibrations. By adopting such a configuration, it is possible to suppress the vibration transmitted from the optical box 13 to the lid member 12 via the projections 133a, 133b, 133c, and 133d, and to reduce the operation noise due to the vibration of the lid member 12. Can do.
In particular, when the attachment reference surfaces 131a to 131d are provided on the bottom side of the optical box 13 and the contact points between the projections 133a to 133d and the lid member 12 are on the opening side of the optical box, the rotational axis direction of the rotary polygon mirror 22 As long as the projections 133a to d are provided near the attachment reference surfaces 131a to 131d.

更に、長時間の使用により走査光学装置２の温度が上昇して光学箱１３や蓋部材１２が変形しても、光学箱１３と蓋部材１２との間には隙間ｅ１が空いており、突起１３３ａ、１３３ｂ、１３３ｃ、１３３ｄ以外での蓋部材１２と光学箱１３との衝突が抑えられる。その結果、光学箱１３の振動に伴う蓋部材１２と光学箱１３との衝突の増加に応じて大きくなる稼動音の悪化を低減することができる。   Furthermore, even if the temperature of the scanning optical device 2 rises due to long-term use and the optical box 13 and the cover member 12 are deformed, the gap e1 is open between the optical box 13 and the cover member 12, Collisions between the lid member 12 and the optical box 13 other than 133a, 133b, 133c, and 133d are suppressed. As a result, it is possible to reduce the deterioration of the operating noise that increases as the collision between the lid member 12 and the optical box 13 due to the vibration of the optical box 13 increases.

また、高さＨ１は隙間ｅ１に対して十分大きいため、二重壁１２１によって、光学箱１３の外にある塵埃が光学箱１３と蓋部材１２との隙間ｅ１を通り光学箱１３の内部へ侵入するのを抑えることが出来る。すなわち、蓋部材１２と光学箱１３の当接箇所が限定されても、防塵性能を維持することが可能となる。   Further, since the height H1 is sufficiently larger than the gap e1, dust outside the optical box 13 penetrates the inside of the optical box 13 through the gap e1 between the optical box 13 and the lid member 12 by the double wall 121. You can suppress doing. That is, even if the contact portion between the lid member 12 and the optical box 13 is limited, the dustproof performance can be maintained.

また、蓋部材１２が反って被係止部１３４が光学箱１３の係止部１２３に当接しても、実施例１においては被係止部１３４をビス４１による固定部近傍に設ける構成としたため、蓋部材１２が大きく振動することはない。   Further, even if the lid member 12 is warped and the locked portion 134 abuts on the locking portion 123 of the optical box 13, in the first embodiment, the locked portion 134 is provided in the vicinity of the fixed portion by the screw 41. The lid member 12 does not vibrate greatly.

また、実施例１では、蓋部材１２と光学箱１３の当接部と、走査光学装置２と光学台３との固定部とがそれぞれ４つの例で説明したがこれに限られるものではない。すなわち、蓋部材１２と光学箱１３の当接部が、走査光学装置２と光学台３との固定部近傍に設けられる構成であれば数は何個であっても良い。   Moreover, in Example 1, although the contact part of the cover member 12 and the optical box 13 and the fixing | fixed part of the scanning optical apparatus 2 and the optical bench 3 were each demonstrated by four examples, it is not restricted to this. That is, the number of the contact members between the lid member 12 and the optical box 13 may be any number as long as the contact member is provided in the vicinity of the fixed portion between the scanning optical device 2 and the optical bench 3.

また、実施例１では突起を光学箱１３に設けたが、図８のように、蓋部材１２に突起１２４ａ、１２４ｂ、１２４ｃ、１２４ｄを設けても実施例１と同様の効果を得られる。この場合、蓋部材１２が光学箱１３を覆った状態において、光学箱１３のうち突起１２４ａ、１２４ｂ、１２４ｃ、１２４ｄと当接する部分が本発明の支持部に対応する構成となる。   In the first embodiment, the projections are provided on the optical box 13. However, as shown in FIG. In this case, when the cover 12 covers the optical box 13, the portion of the optical box 13 in contact with the projections 124a, 124b, 124c, 124d corresponds to the support of the present invention.

（実施例２）
次に、図９〜図１２を参照して、実施例２について説明する。実施例２においては、蓋部材６２が光学箱６３に対してビス締結されている点で実施例１と異なる。画像形成装置の全体構成等については実施例１と同様であるため、その説明は省略する。 (Example 2)
Next, Example 2 will be described with reference to FIGS. The second embodiment is different from the first embodiment in that the lid member 62 is screwed to the optical box 63. The entire configuration of the image forming apparatus is the same as that of the first embodiment, and thus the description thereof is omitted.

図９は、実施例２の走査光学装置を示す上面図である。なお、図９においては、説明の便宜上、蓋部材は省略した。図１０は、実施例２の走査光学装置を示す斜視図であって、蓋部材を開いた状態を示す図である。図１１は、実施例２の走査光学装置を示す斜視図であって、蓋部材を閉じた状態を示す図である。図１２は、実施例２の走査光学装置を示す断面図である。   FIG. 9 is a top view showing the scanning optical apparatus of the second embodiment. In addition, in FIG. 9, the cover member is abbreviate | omitted for convenience of explanation. FIG. 10 is a perspective view illustrating the scanning optical device according to the second embodiment and illustrates a state in which the lid member is opened. FIG. 11 is a perspective view illustrating the scanning optical device according to the second embodiment and illustrates a state in which the lid member is closed. FIG. 12 is a cross-sectional view showing the scanning optical device of the second embodiment.

図９に示すように、光学箱６３は、円柱状の支持部としての突起６３３ａ、６３３ｂと、支持部としての蓋座面６３５ａ、６３５ｂを有する。また、光学箱６３は、実施例１と同様に被係止部６３４ａ、６３４ｂ、６３４ｃ、６３４ｄを有している。一方、図１０に示すように、蓋部材６２は、基準丸穴６２２ｂ、基準長丸穴６２２ｄを有している。この基準丸穴６２２ｂ、基準長丸穴６２２ｄに突起６３３ａ、突起６３３ｄがそれぞれ嵌合することで、蓋部材６２の光学箱６３に対する位置決めがされる。また、図１０に示すように、蓋部材６２は、実施例１と同様に、係止部６２３ａ、６２３ｂ、６２３ｃ、６２３ｄを有している。   As shown in FIG. 9, the optical box 63 has protrusions 633a and 633b as columnar support portions and lid seat surfaces 635a and 635b as support portions. Further, the optical box 63 has locked portions 634a, 634b, 634c, and 634d as in the first embodiment. On the other hand, as shown in FIG. 10, the lid member 62 has a reference round hole 622b and a reference long round hole 622d. The protrusion 633a and the protrusion 633d are fitted into the reference round hole 622b and the reference long circular hole 622d, respectively, so that the lid member 62 is positioned with respect to the optical box 63. As shown in FIG. 10, the lid member 62 has locking portions 623a, 623b, 623c, and 623d as in the first embodiment.

蓋部材６２が光学箱６３を覆った状態において、蓋部材６２の係止部６２３ａ、６２３ｂ、６２３ｃ、６２３ｄが、光学箱６３の被係止部６３４ａ、６３４ｂ、６３４ｃ、６３４ｄにそれぞれ係止する。蓋部材６２が光学箱６３を覆った状態において、係止部６２３と被係止部６３４とは通常は当接していない。係止部６２３と被係止部６３４は、走査光学装置５２に衝撃が加わった場合、蓋部材６２が光学箱６３から外れることを防止するために設けられるものである。   In a state where the cover member 62 covers the optical box 63, the locking portions 623a, 623b, 623c and 623d of the cover member 62 lock with the locked portions 634a, 634b, 634c and 634d of the optical box 63, respectively. In a state where the lid member 62 covers the optical box 63, the locking portion 623 and the locked portion 634 are not normally in contact with each other. The locking portion 623 and the locked portion 634 are provided to prevent the lid member 62 from being detached from the optical box 63 when an impact is applied to the scanning optical device 52.

実施例２において、図１１に示すように、蓋部材６２は、蓋ビス６４ａ、６４ｂによって、光学箱６３の蓋座面６３５ａ、６３５ｂに固定される。突起６３３ａ、６３３ｂと蓋座面６３５ａ、６３５ｂは、蓋部材６２に向けて突起しており、光学箱６３は、突起６３３ａ、６３３ｂと蓋座面６３５ａ、６３５ｂのみで蓋部材６２と当接している。   In the second embodiment, as shown in FIG. 11, the lid member 62 is fixed to the lid seat surfaces 635a and 635b of the optical box 63 by the lid screws 64a and 64b. The projections 633a and 633b and the lid seat surfaces 635a and 635b project toward the lid member 62, and the optical box 63 is in contact with the lid member 62 only by the projections 633a and 633b and the lid seat surfaces 635a and 635b. .

また、実施例２においては、図１２の断面図に示すように、蓋部材６２と光学箱６３との間には突起６３３、蓋座面６３５の高さ分の隙間である隙間ｅ２が形成される。隙間ｅ２は、０．５ｍｍ程度である。また、蓋部材６２には光学箱６３の外周の側壁６３６を挟むように二重壁（第１壁部６２１ｂ、第２壁部６２１ａ）が下方に伸びて形成されている。蓋部材６２の上面からの距離である二重壁６２１の高さＨ２は、蓋部材６２と光学箱６３の隙間ｅ２よりも大きく、５．０ｍｍ程度である。なお、光学箱６３の外周の側壁６３６と、蓋部材６２の二重壁６２１とは互いに接触しておらず、外周の側壁６３６の縁部６３６ａと蓋部材６２との間にも同様に隙間ｅ２が形成される構成とした。このように、側壁６３６と蓋部材６２との間には隙間が形成されており、光学箱６３の内部と外部が完全に塞がれる構成とはなっていない。しかし、図１２に示すように、二重壁構造となっているため、光学箱６３内へ外部から塵埃が入りにくい構成となっている。   Further, in the second embodiment, as shown in the sectional view of FIG. 12, a gap e2 which is a gap corresponding to the height of the projection 633 and the lid seat surface 635 is formed between the lid member 62 and the optical box 63. Ru. The clearance e2 is about 0.5 mm. Further, double walls (a first wall portion 621 b and a second wall portion 621 a) are formed on the lid member 62 so as to sandwich the side wall 636 on the outer periphery of the optical box 63. The height H2 of the double wall 621, which is the distance from the upper surface of the lid member 62, is larger than the gap e2 between the lid member 62 and the optical box 63, and is about 5.0 mm. The side wall 636 on the outer periphery of the optical box 63 and the double wall 621 of the lid member 62 are not in contact with each other, and the gap e2 is similarly provided between the edge 636a of the side wall 636 on the outer periphery and the lid member 62. Was formed. As described above, a gap is formed between the side wall 636 and the lid member 62, and the inside and the outside of the optical box 63 are not completely closed. However, as shown in FIG. 12, since it has a double wall structure, the optical box 63 has a structure in which dust does not easily enter from the outside.

実施例２においては、蓋ビス６４ａ、６４ｂで蓋部材６２を光学箱６３に対して固定している。蓋部材６２の振動モードは蓋部材６２のサイズや重量など蓋部材６２の構成によって変わるため、場合によっては蓋ビス６４ａ、６４ｂで蓋部材６２を固定した方が稼働音を更に抑えることが可能となる。したがって、実施例２において蓋部材６２の振動をより抑えることが出来る可能性が高い。その結果、実施例２によって更に稼働音を改善した
走査光学装置、およびそれを用いた画像形成装置を提供することが可能となる。 In the second embodiment, the lid member 62 is fixed to the optical box 63 with the lid screws 64a and 64b. Since the vibration mode of the lid member 62 changes depending on the size and weight of the lid member 62 depending on the configuration of the lid member 62, in some cases it is possible to further suppress the operation noise by fixing the lid member 62 with the lid screws 64a and 64b. Become. Therefore, there is a high possibility that the vibration of the lid member 62 can be further suppressed in the second embodiment. As a result, it is possible to provide a scanning optical device that further improves operating sound according to the second embodiment and an image forming apparatus using the same.

１…装置本体、１１…光源ユニット（光源）、１２…蓋部材、１３…光学箱、２２…回転多面鏡 DESCRIPTION OF SYMBOLS 1 ... Apparatus main body, 11 ... Light source unit (light source), 12 ... Cover member, 13 ... Optical box, 22 ... Rotating polygon mirror

Claims (12)

光源と、回転駆動することで前記光源から照射されるレーザ光を偏向する回転多面鏡と、前記回転多面鏡を回転駆動させる駆動部と、を収容し、画像形成装置の装置本体に対して固定される光学箱と、
前記光学箱に設けられた支持部に支持され、前記光学箱を覆う蓋部材と、
を有する走査光学装置であって、
前記支持部は、前記回転多面鏡の回転軸方向から見て、前記光学箱が前記装置本体に固定される前記光学箱の底面の四隅に設けられた固定部の近傍に設けられており、
前記支持部は、前記蓋部材が前記光学箱を覆った状態において前記蓋部材に向けて突き出るように前記光学箱に設けられた複数の突起であって、前記突起の先端面で前記蓋部材を支持する複数の突起であり、
前記蓋部材は、前記蓋部材が前記光学箱を覆った状態において前記突起が嵌る穴を有し、前記穴の底面において前記突起の前記先端面に載せられていることを特徴とする走査光学装置。 A light source, a rotary polygon mirror that deflects laser light emitted from the light source by being driven to rotate, and a drive unit that rotates the rotary polygon mirror are accommodated and fixed to the apparatus main body of the image forming apparatus. An optical box to be
A lid member supported by a support provided on the optical box and covering the optical box;
A scanning optical device having
The support portion is provided in the vicinity of the fixing portions provided at the four corners of the bottom surface of the optical box where the optical box is fixed to the apparatus main body as seen from the rotation axis direction of the rotary polygon mirror.
Said support portion, it plurality of projections der provided in a state in which the cover member covers the optical box to the optical box so as to protrude toward the cover member, the cover member in the distal end surface of the projection a plurality of protrusions der supporting the is,
The lid member, the lid member have a hole in which the projection is fitted in a state of covering the optical box, the scanning optical device according to claim Rukoto at the bottom of the hole it has been placed on the tip surface of the projection . 光源と、回転駆動することで前記光源から照射されるレーザ光を偏向する回転多面鏡と、前記回転多面鏡を回転駆動させる駆動部と、を収容し、画像形成装置の装置本体に対して固定される光学箱と、
前記光学箱に設けられた支持部に支持され、前記光学箱を覆う蓋部材と、
を有する走査光学装置であって、
前記支持部は、前記回転多面鏡の回転軸方向から見て、前記光学箱が前記装置本体に固定される前記光学箱の底面の四隅に設けられた固定部の近傍に設けられており、
前記支持部は、前記蓋部材が前記光学箱を覆った状態において前記蓋部材に向けて突き出るように前記光学箱に設けられた複数の突起であって、前記突起の先端面で前記蓋部材を支持する複数の突起であり、
前記蓋部材は、前記蓋部材が前記光学箱を覆った状態において前記複数の突起のうち少なくとも２つの突起がそれぞれ嵌る２つの穴を有し、前記穴の底面において前記突起の前記先端面に載せられていることを特徴とする走査光学装置。 A light source, a rotary polygon mirror that deflects laser light emitted from the light source by being driven to rotate, and a drive unit that rotates the rotary polygon mirror are accommodated and fixed to the apparatus main body of the image forming apparatus. An optical box to be
A lid member that is supported by a support provided in the optical box and covers the optical box;
A scanning optical device having
The support portion is provided in the vicinity of the fixing portions provided at the four corners of the bottom surface of the optical box where the optical box is fixed to the apparatus main body as seen from the rotation axis direction of the rotary polygon mirror.
Said support portion, it plurality of projections der provided in a state in which the cover member covers the optical box to the optical box so as to protrude toward the cover member, the cover member in the distal end surface of the projection a plurality of protrusions der supporting the is,
The lid member, wherein in a state where the lid member covers the optical box plurality of at least two projections of the projections have a two holes fitted respectively, placed on the front end surface of the projection at the bottom of the hole It is optionally scanning optical apparatus according to claim Rukoto. 光源と、回転駆動することで前記光源から照射されるレーザ光を偏向する回転多面鏡と
、前記回転多面鏡を回転駆動させる駆動部と、を収容し、画像形成装置の装置本体に対して固定される光学箱と、
前記光学箱に設けられた支持部に支持され、前記光学箱を覆う蓋部材と、
を有する走査光学装置であって、
前記支持部は、前記回転多面鏡の回転軸方向から見て、前記光学箱が前記装置本体に固定される前記光学箱の底面の四隅に設けられた固定部の近傍に設けられており、
前記蓋部材は、前記蓋部材が前記光学箱を覆った状態において前記光学箱に向けて突き出た複数の突起を有し、
前記支持部は、前記突起の先端面に当接することで前記蓋部材を支持し、
前記光学箱は、前記支持部に当接した前記突起が嵌る穴を有し、前記穴の底面において前記突起の前記先端面に当接することを特徴とする走査光学装置。 A light source, a rotary polygon mirror that deflects laser light emitted from the light source by being driven to rotate, and a drive unit that rotates the rotary polygon mirror are accommodated and fixed to the apparatus main body of the image forming apparatus. An optical box to be
A lid member supported by a support provided on the optical box and covering the optical box;
A scanning optical device having
The support portion is provided in the vicinity of the fixing portions provided at the four corners of the bottom surface of the optical box where the optical box is fixed to the apparatus main body as seen from the rotation axis direction of the rotary polygon mirror.
The lid member has a plurality of protrusions protruding toward the optical box in a state where the lid member covers the optical box,
The support portion supports the lid member by abutting on a tip end surface of the protrusion,
The optical box, the support portion have a bore which abuts the protrusion is fitted, the scanning optical apparatus, characterized by contact with the tip surface of the projection at the bottom of the hole. 光源と、回転駆動することで前記光源から照射されるレーザ光を偏向する回転多面鏡と、前記回転多面鏡を回転駆動させる駆動部と、を収容し、画像形成装置の装置本体に対して固定される光学箱と、
前記光学箱に設けられた支持部に支持され、前記光学箱を覆う蓋部材と、
を有する走査光学装置であって、
前記支持部は、前記回転多面鏡の回転軸方向から見て、前記光学箱が前記装置本体に固定される前記光学箱の底面の四隅に設けられた固定部の近傍に設けられており、
前記蓋部材は、前記蓋部材が前記光学箱を覆った状態において前記光学箱に向けて突き出た複数の突起を有し、
前記支持部は、前記突起の先端面に当接することで前記蓋部材を支持し、
前記光学箱は、前記支持部に当接した前記複数の突起のうち少なくとも２つの突起が嵌る少なくとも２つの穴を有し、前記穴の底面において前記突起の前記先端面に当接することを特徴とする走査光学装置。 A light source, a rotary polygon mirror that deflects laser light emitted from the light source by being driven to rotate, and a drive unit that rotates the rotary polygon mirror are accommodated and fixed to the apparatus main body of the image forming apparatus. With optical box,
A lid member that is supported by a support provided in the optical box and covers the optical box;
A scanning optical device comprising:
The support portion is provided in the vicinity of the fixing portions provided at the four corners of the bottom surface of the optical box where the optical box is fixed to the apparatus main body as seen from the rotation axis direction of the rotary polygon mirror.
The lid member has a plurality of protrusions protruding toward the optical box in a state where the lid member covers the optical box;
The support portion supports the lid member by abutting on a tip end surface of the protrusion,
The optical box, the one of the plurality of projections in contact with the supporting portion have at least two holes at least two projections are fitted, that you contact the front end surface of the projection at the bottom of the hole A scanning optical device. 前記光学箱は、前記支持部でのみ前記蓋部材と接触することを特徴とする請求項１乃至４のいずれか１項に記載の走査光学装置。   The scanning optical device according to claim 1, wherein the optical box is in contact with the lid member only at the support portion. 前記蓋部材は、前記光学箱を覆った状態において、前記光学箱の側壁よりも前記光学箱の外側において前記側壁に沿って前記側壁の縁部よりも下方に延びる第１壁部を有することを特徴とする請求項１乃至５のいずれか１項に記載の走査光学装置。   The lid member has a first wall extending along the side wall and below the edge of the side wall outside the side wall of the optical box, in a state of covering the optical box. The scanning optical device according to any one of claims 1 to 5, characterized in that: 前記蓋部材は、前記光学箱を覆った状態において、前記側壁よりも前記光学箱の内側において前記側壁に沿って前記縁部よりも下方に延びて、前記第１壁部と共に前記側壁を挟み込む第２壁部を有することを特徴とする請求項６に記載の走査光学装置。   The cover member extends below the edge along the side wall inside the optical box with respect to the side wall and sandwiches the side wall together with the first wall portion in a state of covering the optical box. 7. The scanning optical apparatus according to claim 6, having two walls. 前記光学箱は底部と前記底部に立設された側壁を備え、前記固定部は前記光学箱の前記底部の下面に設けられ、前記支持部は前記光学箱の前記側壁の上端面に設けられていることを特徴とする請求項１乃至７のいずれか１項に記載の走査光学装置。   The optical box comprises a bottom portion and a side wall erected on the bottom portion, the fixing portion is provided on the lower surface of the bottom portion of the optical box, and the support portion is provided on an upper end surface of the side wall of the optical box The scanning optical device according to any one of claims 1 to 7, characterized in that: 前記蓋部材は、前記光学箱に設けられる被係止部を係止する係止部を有し、
前記係止部は、前記回転多面鏡の回転軸方向から見て、前記光学箱の底面の四隅に設けられた前記固定部の近傍に設けられることを特徴とする請求項１乃至８のいずれか１項に記載の走査光学装置。 The lid member has a locking portion for locking a locked portion provided on the optical box,
The said latching | locking part is provided in the vicinity of the said fixing | fixed part provided in the four corners of the bottom face of the said optical box seeing from the rotating shaft direction of the said rotary polygon mirror. The scanning optical device according to item 1. 前記装置本体に対する前記光学箱の固定はビス締結により行われることを特徴とする請求項１乃至９のいずれか１項に記載の走査光学装置。   The scanning optical apparatus according to claim 1, wherein the optical box is fixed to the apparatus main body by screw fastening. 前記蓋部材が前記光学箱に対してビス締結により固定されることを特徴とする請求項１
乃至１０のいずれか１項に記載の走査光学装置。 The lid member is fixed to the optical box by screw fastening.
The scanning optical device according to any one of 1 to 10. 請求項１乃至１１のいずれか１項に記載の走査光学装置と、
前記走査光学装置から照射されるレーザ光により表面に静電潜像が形成される像担持体と、
を有し、
前記静電潜像を現像することで形成された現像剤像を転写材に転写し、転写材上に画像形成を行うことを特徴とする画像形成装置。 A scanning optical device according to any one of claims 1 to 11,
An image carrier on which an electrostatic latent image is formed on the surface by laser light emitted from the scanning optical device;
Have
An image forming apparatus, comprising: transferring a developer image formed by developing the electrostatic latent image onto a transfer material; and forming an image on the transfer material.
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US6005703A (en) * 1998-05-29 1999-12-21 Lexmark International, Inc. Optical system for light beam scanning
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