JPH0455032U - - Google Patents
Info
- Publication number
- JPH0455032U JPH0455032U JP9685290U JP9685290U JPH0455032U JP H0455032 U JPH0455032 U JP H0455032U JP 9685290 U JP9685290 U JP 9685290U JP 9685290 U JP9685290 U JP 9685290U JP H0455032 U JPH0455032 U JP H0455032U
- Authority
- JP
- Japan
- Prior art keywords
- document
- opening
- platen
- detection sensor
- degree
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 1
Landscapes
- Holders For Sensitive Materials And Originals (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
第１図は本考案の原稿サイズ検知装置の実施例
を示す概略側面図、第２図は同原稿サイズ検知装
置において使用される原稿検知センサの構成例を
示す概略断面図、第３図ａ，ｂ及びｃはプラテン
カバーと開閉度検出スイツチの状態との関係を示
す説明図、第４図は本考案の原稿サイズ検知装置
の回路例を示すブロツク図、第５図は第４図に示
す回路における動作を説明するためのフローチヤ
ート、第６図は本考案の原稿サイズ検知装置の他
の回路例を示すブロツク図、第７図は第６図に示
す回路における動作を説明するためのフローチヤ
ートである。
１……筐体、１ａ……天板、１ｂ……透孔、２
……プラテンガラス、３，４……原稿検知センサ
、５……発光素子、６，８……レンズ、７……可
視光遮断フイルタ、９……受光素子、１０……プ
ラテンカバー、１０ａ……基端部、１０ｂ……遊
端部、１１……軸、１２……支持部、１３……開
閉度検出スイツチ、１４……アクチユエータ、１
４ａ……一部、１４ｂ，１４ｃ……遮光部、１５
，１６……プラテンセンサ、１７……遅延回路、
１８……マイクロコンピユータ、１９，２０……
増幅器、２１，２２……比較器。
FIG. 1 is a schematic side view showing an embodiment of the document size detection device of the present invention, FIG. 2 is a schematic sectional view showing an example of the structure of a document detection sensor used in the document size detection device, and FIGS. b and c are explanatory diagrams showing the relationship between the platen cover and the state of the opening/closing detection switch, FIG. 4 is a block diagram showing an example of the circuit of the document size detection device of the present invention, and FIG. 5 is the circuit shown in FIG. 4. FIG. 6 is a block diagram showing another circuit example of the document size detection device of the present invention. FIG. 7 is a flow chart explaining the operation of the circuit shown in FIG. 6. It is. 1...Housing, 1a...Top plate, 1b...Through hole, 2
...Platen glass, 3, 4... Original detection sensor, 5... Light emitting element, 6, 8... Lens, 7... Visible light blocking filter, 9... Light receiving element, 10... Platen cover, 10a... Base end portion, 10b... Free end portion, 11... Shaft, 12... Support portion, 13... Opening/closing degree detection switch, 14... Actuator, 1
4a...part, 14b, 14c...shading part, 15
, 16... platen sensor, 17... delay circuit,
18...Microcomputer, 19,20...
Amplifier, 21, 22... comparator.
Claims (1)
られた原稿検知センサと、前記プラテンガラスを
開閉自在に覆うプラテンカバーと、該プラテンカ
バーの開閉度を検出する開閉度検出手段と、前記
プラテンカバーが一定の開度以下になつたときの
前記原稿検知センサの出力と前記プラテンカバー
が閉状態直前になつたときから所定時間経過後の
前記原稿検知センサの出力とを検出し両出力の関
係から前記原稿センサ位置における原稿の有無を
検出する演算手段とを設けたことを特徴とする原
稿サイズ検知装置。 a document detection sensor provided below a platen glass on which a document is placed; a platen cover that covers the platen glass in an openable and closable manner; an opening/closing degree detection means for detecting the degree of opening/closing of the platen cover; The output of the document detection sensor when the opening degree is below a certain level and the output of the document detection sensor after a predetermined time has elapsed since the platen cover is about to close are detected, and based on the relationship between the two outputs, What is claimed is: 1. A document size detection device comprising: arithmetic means for detecting the presence or absence of a document at a document sensor position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9685290U JPH0455032U (en) | 1990-09-14 | 1990-09-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9685290U JPH0455032U (en) | 1990-09-14 | 1990-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0455032U true JPH0455032U (en) | 1992-05-12 |
Family
ID=31836717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9685290U Pending JPH0455032U (en) | 1990-09-14 | 1990-09-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0455032U (en) |
-
1990
- 1990-09-14 JP JP9685290U patent/JPH0455032U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5968336U (en) | Document cover opening/closing detection device | |
| JPS58166629U (en) | focus detection camera | |
| JPH0455032U (en) | ||
| JPH03130661U (en) | ||
| JPH0326134U (en) | ||
| JPS58141254U (en) | Automatic copy start device for copiers | |
| JPH03123363U (en) | ||
| JPH0415353U (en) | ||
| JPH0310229U (en) | ||
| JPH02140389U (en) | ||
| JPH0495U (en) | ||
| JPS5849231U (en) | Direct reading detection display device | |
| JPS63185135U (en) | ||
| JPH0176093U (en) | ||
| JPS6218775U (en) | ||
| JPS62168528U (en) | ||
| JPH01142937U (en) | ||
| JPH0472238U (en) | ||
| JPS63162355U (en) | ||
| JPH0358093U (en) | ||
| JPS6365356U (en) | ||
| JPS6444457U (en) | ||
| JPH024836U (en) | ||
| JPS6110589U (en) | Infrared object detection device | |
| JPS5865557U (en) | Absorbance measuring device |