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Publication number
JPH0481811A
JPH0481811A JP19703890A JP19703890A JPH0481811A JP H0481811 A JPH0481811 A JP H0481811A JP 19703890 A JP19703890 A JP 19703890A JP 19703890 A JP19703890 A JP 19703890A JP H0481811 A JPH0481811 A JP H0481811A
Authority
JP
Japan
Prior art keywords
case
light source
drive board
signal detection
detection sensor
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
Application number
JP19703890A
Other languages
Japanese (ja)
Inventor
Izumi Ogawa
泉 小川
Masaru Fukase
深瀬 勝
Kaiji Uchida
内田 海司
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba TEC Corp
Original Assignee
Tokyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Electric Co Ltd filed Critical Tokyo Electric Co Ltd
Priority to JP19703890A priority Critical patent/JPH0481811A/en
Publication of JPH0481811A publication Critical patent/JPH0481811A/en
Pending legal-status Critical Current

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  • Mechanical Optical Scanning Systems (AREA)

Abstract

PURPOSE:To prevent soiling of a synchronizing signal detecting sensor and scanning optical system by holding the synchronizing signal detecting sensor with a part of a motor driving substrate for driving a polygon mirror. CONSTITUTION:A light source driving substrate 16 connected to the juncture of the motor driving substrate 13 is mounted to one side of a case 1 by a cable 18. A semiconductor laser 3 is held on this light source driving substrate 16 and a driving circuit for driving this semiconductor laser 3 is formed. One end of the above-mentioned motor driving substrate 13 is extended to the lateral side of the case 1 and a holding part 17 to hold the synchronizing signal detecting sensor 14 is provided in the extended part. A synchronizing signal detecting circuit (not shown) is connected to this synchronizing signal detecting sensor 14 is formed. The mirror 15 may be omitted by disposing the sensor 14 in the position of the mirror 15. The substrate 13 is extended to the right side and the holding part 17 to hold the sensor 14 is provided in this extended part.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、光源から照射されたビーム光をポリゴンミラ
ーにより走査するスキャナ装置に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a scanner device that scans a beam of light emitted from a light source using a polygon mirror.

従来の技術 この種の従来例を第3図及び第4図に基づいて説明する
。1は上面開口のケースで、このケース1の内部には走
査光学系2が設けられている。この走査光学系2は、光
源である半導体レーザ3から照射された光を通すコリメ
ータレンズ4及び集光レンズ5と、この集光レンズ5を
通してミラー6により反射された光を反射するポリゴン
ミラー7と、このポリゴンミラー7に対向するミラー8
と、このミラー8に対向するミラー9と、このミラー9
と像担持体10との間に位置する非球面レンズ11とよ
りなる(第4図参照)。前記ポリゴンミラー7が直結さ
れたモータ12を駆動するモータ駆動回路は、前記ケー
ス1に固定されたモータ駆動基板13に形成されている
。さらに、前記ケース1の内部には、前記走査光学系2
の走査領域外の光、すなわち、前記ミラー8の端部で反
射された光を同期信号検出センサ14に反射するミラー
15が設けられている。そして、前記ケース1の側面に
は、ケーブル18により前記モータ駆動基板13の接続
部に接続された光源駆動基板20が螺子21により固定
され、この光源駆動基板21には、前記半導体レーザ3
と前記同期信号検出センサ14とが保持され、この同期
信号検出センサ14に対向する開口部22が前記ケース
Iの側面に形成されている。さらに、第4図に示すよう
に、ケースlの上面はカバー19により閉塞されている
Prior Art A conventional example of this type will be explained with reference to FIGS. 3 and 4. Reference numeral 1 denotes a case with an opening on the top surface, and a scanning optical system 2 is provided inside this case 1. The scanning optical system 2 includes a collimator lens 4 and a condensing lens 5 that pass light emitted from a semiconductor laser 3 as a light source, and a polygon mirror 7 that reflects the light reflected by a mirror 6 through the condensing lens 5. , a mirror 8 facing this polygon mirror 7
, a mirror 9 facing this mirror 8, and this mirror 9
and an aspherical lens 11 located between the image carrier 10 and the image carrier 10 (see FIG. 4). A motor drive circuit for driving the motor 12 to which the polygon mirror 7 is directly connected is formed on a motor drive board 13 fixed to the case 1. Furthermore, inside the case 1, the scanning optical system 2 is provided.
A mirror 15 is provided to reflect light outside the scanning area, that is, light reflected at the end of the mirror 8, to the synchronization signal detection sensor 14. A light source drive board 20 connected to the connection part of the motor drive board 13 by a cable 18 is fixed to the side surface of the case 1 with screws 21, and the light source drive board 21 has the semiconductor laser 3
and the synchronous signal detection sensor 14 are held, and an opening 22 facing the synchronous signal detection sensor 14 is formed in the side surface of the case I. Further, as shown in FIG. 4, the upper surface of the case l is closed by a cover 19.

したがって、半導体レーザ3からの光はコリメータレン
ズ4により平行化され、集光レンズ5により集光され、
ミラー6によりポリゴンミラー7に照射される。回転す
るポリゴンミラー7によって反射された光はミラー8に
より反射され、ミラー15により反射された走査領域外
の光は同期信号検出センサ14により検出される。これ
により、走査スタートの検出信号が出力される。この検
出信号の出力時から一定時間経過後に半導体し−ザ3か
ら画像信号に基づく光信号が発光される。この光は、前
述した光路を経て、さらに、ミラー9に反射され非球面
レンズ11を通り像担持体10に結像される。
Therefore, the light from the semiconductor laser 3 is collimated by the collimator lens 4 and condensed by the condensing lens 5,
The light is irradiated by the mirror 6 onto the polygon mirror 7. The light reflected by the rotating polygon mirror 7 is reflected by the mirror 8, and the light reflected by the mirror 15 outside the scanning area is detected by the synchronization signal detection sensor 14. As a result, a scan start detection signal is output. After a certain period of time has elapsed since the output of this detection signal, an optical signal based on the image signal is emitted from the semiconductor laser 3. This light passes through the optical path described above, is further reflected by the mirror 9, passes through the aspherical lens 11, and is imaged on the image carrier 10.

発明が解決しようとする課題 光源駆動基板20はモータ駆動基板13とともに外部回
路に接続するためにケース1の外部に取り付けられてい
るが、この光源駆動基板20には、半導体レーザ3と、
この半導体レーザ3を駆動する駆動回路(図示せず)と
、同期信号検出センサ14と、この同期信号検出センサ
14に接続された同期信号検出回路(図示せず)とを設
けるため、光源駆動基板2oが大きくなる。このため、
ケースlをレーザープリンタ等の装置の本体に取り付け
る際に自由度が低くなる。また、同期信号検出センサ1
4はケース1の外側面に位置するため汚れ易く、さらに
、同期信号検出センサ14に対向する開口部22から侵
入する塵埃により走査光学系2を汚すおそれがある。
Problems to be Solved by the Invention The light source drive board 20 is attached to the outside of the case 1 together with the motor drive board 13 for connection to an external circuit.
In order to provide a drive circuit (not shown) for driving this semiconductor laser 3, a synchronous signal detection sensor 14, and a synchronous signal detection circuit (not shown) connected to this synchronous signal detection sensor 14, a light source driving board is provided. 2o becomes larger. For this reason,
This reduces the degree of freedom when attaching the case l to the main body of a device such as a laser printer. In addition, the synchronization signal detection sensor 1
4 is located on the outer surface of the case 1 and therefore easily gets dirty, and there is also a risk that the scanning optical system 2 may be contaminated by dust entering through the opening 22 facing the synchronization signal detection sensor 14.

課題を解決するための手段 モータに連結されたポリゴンミラーを含む走査光学系と
前記モータを駆動するモータ駆動基板とが内蔵されたケ
ースと、前記ポリゴンミラーの外周に対向する光源を保
持して前記ケースの外面に取り付けられた光源駆動基板
と、前記走査光学系の走査領域外の光路に位置する同期
信号検出センサと、前記モータ駆動基板の一部に形成さ
れて前記同期信号検出センサを保持する保持部とにより
構成した。
Means for Solving the Problems A case incorporating a scanning optical system including a polygon mirror connected to a motor and a motor drive board for driving the motor, and a case that holds a light source facing the outer circumference of the polygon mirror, A light source drive board attached to the outer surface of the case, a synchronization signal detection sensor located on an optical path outside the scanning area of the scanning optical system, and a part of the motor drive board to hold the synchronization signal detection sensor. It consists of a holding part.

作用 ポリゴンミラーを駆動するためのモータ駆動基板の一部
で同期信号横比センサを保持することができるため、同
期信号検出センサをケース内に収納するとともに走査光
学系からの光を通す開口部をケースに形成する必要性を
なくすことができ、したがって、同期信号検出センサ及
び走査光学系の汚れを防止することができ、また、光源
駆動基板を小型化することができるため、装置の本体に
対するケースの取り付は構造の自由度を増すことができ
る。
Since the synchronous signal side ratio sensor can be held in a part of the motor drive board for driving the working polygon mirror, the synchronous signal detection sensor is housed inside the case, and an opening through which the light from the scanning optical system passes is provided. It is possible to eliminate the need to form a case on the main body of the device, thus preventing the synchronization signal detection sensor and the scanning optical system from becoming dirty, and making it possible to downsize the light source drive board. The installation of can increase the degree of freedom of the structure.

実施例 本発明の一実施例を第1図及び第2図に基づいて説明す
る。第3図及び第4図において説明した部分と同一部分
は同一符号を用い説明も省略する。
Embodiment An embodiment of the present invention will be explained based on FIGS. 1 and 2. Components that are the same as those described in FIGS. 3 and 4 are designated by the same reference numerals, and description thereof will be omitted.

ケーブル18によりモータ駆動基板13の接続部に接続
された光源駆動基板16がケース1の一側に取り付けら
れている。この光源駆動基板16には、半導体レーザ3
が保持されているとともに、この半導体レーザ3を駆動
する駆動回路(図示せず)が形成されている。また、前
記モータ駆動基板13の一端はケース1の側方に延出さ
れ、その延出部分には同期信号検出センサ14を保持す
る保持部17が設けられているとともに、この同期信号
検量センサ14に接続された同期信号検出回路(図示せ
ず)が形成されている。
A light source drive board 16 is attached to one side of the case 1 and is connected to a connection portion of the motor drive board 13 via a cable 18 . This light source drive board 16 includes a semiconductor laser 3
is held, and a drive circuit (not shown) for driving this semiconductor laser 3 is formed. Further, one end of the motor drive board 13 is extended to the side of the case 1, and a holding part 17 for holding the synchronization signal detection sensor 14 is provided on the extension part. A synchronous signal detection circuit (not shown) connected to is formed.

このような構成において、ポリゴンミラー7を駆動する
ためのモータ駆動基板13の一部となる保持部17て同
期信号検出センサ14を保持することができるため、同
期信号検出センサ14をケース1内に収納するとともに
走査光学系2からの光を通す開口部をケース1に形成す
る必要性をなくすことができる。したがって、同期信号
検量センサ14及び走査光学系2の汚れを防止すること
ができる。また、光源駆動基板16は同期信号検出セン
サ14を保持する必要がないため小型化を図ることがで
き、これにより、装置の本体に対するケースlの取り付
は構造の自由度を増すことができる。
In such a configuration, the synchronous signal detection sensor 14 can be held by the holding part 17 that is a part of the motor drive board 13 for driving the polygon mirror 7. It is possible to eliminate the need to form an opening in the case 1 to accommodate the light from the scanning optical system 2. Therefore, it is possible to prevent the synchronization signal calibration sensor 14 and the scanning optical system 2 from becoming dirty. Further, since the light source drive board 16 does not need to hold the synchronization signal detection sensor 14, it can be made smaller, and thereby the case l can be attached to the main body of the device with increased structural freedom.

なお、ミラー15の位置に同期信号検量センサ14を配
置してミラー15を省略してもよい。この場合にはモー
タ駆動基板13を右側に延出し、その延出部に同期信号
検出センサ14を保持する保持部17を設ける。
Note that the mirror 15 may be omitted by disposing the synchronous signal calibration sensor 14 at the position of the mirror 15. In this case, the motor drive board 13 is extended to the right, and a holding part 17 for holding the synchronization signal detection sensor 14 is provided on the extended part.

発明の効果 本発明は上述のように、モータに連結されたポリゴンミ
ラーを含む走査光学系と前記モータを駆動するモータ駆
動基板とが内蔵されたケースと、前記ポリゴンミラーの
外周に対向する光源を保持して前記ケースの外面に取り
付けられた光源駆動基板と、前記走査光学系の走査領域
外の光路に位置する同期信号検出センサと、前記モータ
駆動基板の一部に形成されて前記同期信号検出センサを
保持する保持部とにより構成したので、ポリゴンミラー
を駆動するためのモータ駆動基板の一部で同期信号検量
センサを保持することができるため、同期信号検出セン
サをケース内に収納するとともに走査光学系からの光を
通す開口部をケースに形成する必要性をなくすことがで
き、したがって、同期信号検出センサ及び走査光学系の
汚れを防止することができ、また、光源駆動基板を小型
化することができるため、装置の本体に対するケースの
取り付は構造の自由度を増すことができる等の効果を有
する。
Effects of the Invention As described above, the present invention includes a case incorporating a scanning optical system including a polygon mirror connected to a motor and a motor drive board for driving the motor, and a light source facing the outer periphery of the polygon mirror. a light source drive board held and attached to the outer surface of the case; a synchronization signal detection sensor located on the optical path outside the scanning area of the scanning optical system; and a synchronization signal detection sensor formed on a part of the motor drive board to detect the synchronization signal. Since it is configured with a holding part that holds the sensor, the synchronous signal calibration sensor can be held in a part of the motor drive board for driving the polygon mirror, so the synchronous signal detection sensor can be stored in the case and the scanning It is possible to eliminate the need to form an opening in the case through which light from the optical system passes, and therefore it is possible to prevent the synchronization signal detection sensor and the scanning optical system from becoming dirty, and it is also possible to downsize the light source driving board. Therefore, attaching the case to the main body of the device has the effect of increasing the degree of freedom in structure.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図及び第2図は本発明の一実施例を示すもので、第
1図は平面図、第2図は同期信号検出センサの支持構造
を示す正面図、第3図及び第4図は従来例を示すもので
、第3図は平面図、第4図は縦断側面図である。 1・・・ケース、2・・・走査光学系、3・・・光源、
7・ポリゴンミラー、12・・・モータ、13・・・モ
ータ駆動基板、14・・・同期信号検出センサ、16・
・・光源駆動基板、17・・・保持部
1 and 2 show an embodiment of the present invention. FIG. 1 is a plan view, FIG. 2 is a front view showing the support structure of the synchronous signal detection sensor, and FIGS. 3 and 4 are A conventional example is shown in which FIG. 3 is a plan view and FIG. 4 is a longitudinal sectional side view. 1... Case, 2... Scanning optical system, 3... Light source,
7. Polygon mirror, 12. Motor, 13. Motor drive board, 14. Synchronous signal detection sensor, 16.
...Light source drive board, 17...Holding part

Claims (1)

【特許請求の範囲】[Claims] モータに連結されたポリゴンミラーを含む走査光学系と
前記モータを駆動するモータ駆動基板とが内蔵されたケ
ースと、前記ポリゴンミラーの外周に対向する光源を保
持して前記ケースの外面に取り付けられた光源駆動基板
と、前記走査光学系の走査領域外の光路に位置する同期
信号検出センサと、前記モータ駆動基板の一部に形成さ
れて前記同期信号検出センサを保持する保持部とよりな
ることを特徴とするスキャナ装置。
A case has a built-in scanning optical system including a polygon mirror connected to a motor and a motor drive board for driving the motor, and a light source is attached to the outer surface of the case while holding a light source facing the outer periphery of the polygon mirror. A light source drive board, a synchronization signal detection sensor located on an optical path outside the scanning area of the scanning optical system, and a holding part formed on a part of the motor drive board to hold the synchronization signal detection sensor. Characteristic scanner device.
JP19703890A 1990-07-25 1990-07-25 Scanner Pending JPH0481811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19703890A JPH0481811A (en) 1990-07-25 1990-07-25 Scanner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19703890A JPH0481811A (en) 1990-07-25 1990-07-25 Scanner

Publications (1)

Publication Number Publication Date
JPH0481811A true JPH0481811A (en) 1992-03-16

Family

ID=16367695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19703890A Pending JPH0481811A (en) 1990-07-25 1990-07-25 Scanner

Country Status (1)

Country Link
JP (1) JPH0481811A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013228587A (en) * 2012-04-26 2013-11-07 Canon Inc Optical scanner and image forming apparatus including the optical scanner

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03226710A (en) * 1990-01-31 1991-10-07 Canon Inc Scanning optical device
JPH0421810A (en) * 1990-05-16 1992-01-24 Ricoh Co Ltd Optical scanner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03226710A (en) * 1990-01-31 1991-10-07 Canon Inc Scanning optical device
JPH0421810A (en) * 1990-05-16 1992-01-24 Ricoh Co Ltd Optical scanner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013228587A (en) * 2012-04-26 2013-11-07 Canon Inc Optical scanner and image forming apparatus including the optical scanner

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