JPH0197331U

JPH0197331U -

Info

Publication number: JPH0197331U
Application number: JP1987194324U
Authority: JP
Priority date: 1987-12-21
Filing date: 1987-12-21
Publication date: 1989-06-28

Description

[Brief explanation of the drawing]

第１図ないし第５図は本考案の一実施例を示す
ものであつて、第１図ａは発光ダイオードの位置
決構造を示す平面図、同図ｂはその―矢視断
面図、第２図は発光ダイオードとフオトトランジ
スタとで構成された検知機構の概略構成図、第３
図は複数の検知機構で構成された原稿サイズ検出
装置の説明図、第４図は原稿サイズの判断を行う
ＣＰＵおよび発光ダイオードなどを駆動する駆動
回路を示す回路構成図、第５図は原稿サイズの検
知フローチヤート、第６図および第７図は本考案
の他の実施例を示すものであつて、第６図はフオ
トトランジスタの位置決構造を示す要部の断面図
、第７図ａは素子側基準面を保持ブロツクに形成
した例を示す説明図、同図ｂは保持ブロツクに保
持されたフオトトランジスタの上面に素子側基準
面を形成した例を示す説明図である。１は複写装置、２は原稿載置面、３，４，５，
６はフオトトランジスタ（検知素子）、７，８，
９，１０は発光ダイオード（検知素子）、１１，
１２，１３，１４は検知機構、１５はＣＰＵ、１
６は駆動回路、２０はオリジナルカバー、２２，
２３はスリツト、２４は原稿、２５は基板（検知
素子の下方に位置する部材）、２６は切欠部、２
７は支持板（検知素子の上方に位置する部材）、
３１は保持ブロツク、７ｂは第１基準面（素子側
基準面）、７ｃは第２基準面（素子側基準面）、
２６ａは第３基準面（部材側基準面）、２５ａは
第４基準面（部材側基準面）、３１ａは第５基準
面（素子側基準面）、３ａは第５′基準面（素子
側基準面）、２７ａは第６基準面（部材側基準面
）である。 1 to 5 show an embodiment of the present invention, in which FIG. 1a is a plan view showing a positioning structure of a light emitting diode, FIG. The figure is a schematic configuration diagram of a detection mechanism composed of a light emitting diode and a phototransistor.
The figure is an explanatory diagram of a document size detection device composed of a plurality of detection mechanisms, FIG. 4 is a circuit configuration diagram showing a drive circuit that drives the CPU and light emitting diode, etc. that determine the document size, and FIG. 5 is a diagram showing the document size. The detection flowchart, FIGS. 6 and 7, show other embodiments of the present invention, in which FIG. 6 is a sectional view of the main part showing the positioning structure of the phototransistor, and FIG. An explanatory diagram showing an example in which the element-side reference plane is formed on a holding block, and FIG. 1 is a copying device, 2 is a document placement surface, 3, 4, 5,
6 is a phototransistor (sensing element), 7, 8,
9, 10 are light emitting diodes (sensing elements), 11,
12, 13, 14 are detection mechanisms, 15 is a CPU, 1
6 is the drive circuit, 20 is the original cover, 22,
23 is a slit, 24 is a document, 25 is a substrate (a member located below the sensing element), 26 is a notch, 2
7 is a support plate (a member located above the detection element);
31 is a holding block, 7b is a first reference surface (element side reference surface), 7c is a second reference surface (element side reference surface),
26a is the third reference plane (component side reference plane), 25a is the fourth reference plane (component side reference plane), 31a is the fifth reference plane (element side reference plane), and 3a is the 5' reference plane (element side reference plane). 27a is the sixth reference surface (member-side reference surface).

Claims

[Claims for Utility Model Registration] In a positioning structure for a detection element provided to detect the size of a document placed on a document placement surface, a resin molded body forming the appearance of the detection element is provided. An element-side reference surface is formed on one surface or one surface of the holding block that holds the sensing element, while
A member-side reference surface corresponding to the element-side reference surface is formed on one of the members located above and below the sensing element, and the sensing element and the member have their reference surfaces in contact with each other. 1. A positioning structure for a sensing element, characterized in that it is provided in a state in which the sensing element is positioned.