JPS6120541Y2 - - Google Patents
Info
- Publication number
- JPS6120541Y2 JPS6120541Y2 JP778779U JP778779U JPS6120541Y2 JP S6120541 Y2 JPS6120541 Y2 JP S6120541Y2 JP 778779 U JP778779 U JP 778779U JP 778779 U JP778779 U JP 778779U JP S6120541 Y2 JPS6120541 Y2 JP S6120541Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical path
- blocking member
- light source
- blocking
- 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
Links
- 230000000903 blocking effect Effects 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920004943 Delrin® Polymers 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Description
【考案の詳細な説明】
本考案は光電検出装置に関し、更に詳しくはこ
れら光源と受光素子間の光路を遮断する位置にあ
る光路遮断部材の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a photoelectric detection device, and more particularly to an improvement in an optical path blocking member located at a position that blocks the optical path between the light source and the light receiving element.
従来広く利用されている検出装置として光源と
受光素子を有し、該光源からの光路を遮ることに
より変位又は変化量を検知するものがある。この
ような装置例を第１図に示すと、図において検出
装置基部１は発光ダイオードやランプ等の光源２
と、該光源２に対応するフオトトランジスタや
CdS等の受光素子３とを有し、更にこれら光源２
と素子３との間には外力により回転運動する遮断
部材４が介在する。該遮断部材４は遮断ユニツト
５の一部にあり、該ユニツト５は回転支軸６を中
心に回転可能で、上記ユニツト５の部材４側とは
反対側のカム部７を時計方向に回転すると同時に
遮断部材４を時計方向に回転させ、該部材４は光
路を完全に遮断して検知信号を発する。なお図の
装置は発光ダイオードとフオトトランジスタを使
用する場合の例で、各素子はモールド成形により
樹脂内に埋め込まれ、図中８は各素子からの信号
を検知信号として出力するためのプリント基板を
示す。また、ユニツト５の駆動はシート材の通過
や、シート材を集積したカセツトの存在、更に原
稿の存在や現像剤の重量等により行なつても良
い。 2. Description of the Related Art Conventionally, there is a widely used detection device that includes a light source and a light receiving element, and detects displacement or the amount of change by blocking the optical path from the light source. An example of such a device is shown in FIG. 1. In the figure, a detection device base 1 is a light source 2 such as a light emitting diode or a lamp.
and a phototransistor corresponding to the light source 2.
It has a light receiving element 3 such as CdS, and furthermore, these light sources 2
A blocking member 4 that rotates due to an external force is interposed between the element 3 and the element 3 . The blocking member 4 is a part of a blocking unit 5, and the unit 5 is rotatable around a rotating shaft 6. When the cam portion 7 of the unit 5 on the side opposite to the member 4 is rotated clockwise, At the same time, the blocking member 4 is rotated clockwise so that the blocking member 4 completely blocks the optical path and emits a detection signal. The device shown in the figure is an example in which a light emitting diode and a phototransistor are used. Each element is embedded in resin by molding, and 8 in the figure is a printed circuit board for outputting signals from each element as detection signals. show. Further, the unit 5 may be driven by the passage of the sheet material, the presence of a cassette in which the sheet materials are accumulated, the presence of an original, the weight of the developer, etc.
ところで上記の如くモールド成形で作成した検
出装置部１は、光源２と受光素子３との間隙が一
般的に比較的狭く、５mm以下や更に数mm程度であ
る。従つて、これら素子間に介在させる遮断部材
４の厚さは更に薄くなり、材料として薄い金属板
が使用される。ところで上記遮断ユニツト５の形
状が小型で複雑化したり、または組立て工程数の
低減や製作費の低減を考慮した場合、遮断部材を
も樹脂によりモールド成形することが有利であ
る。しかし、従来の樹脂を数mm以下の薄板に成形
した場合、先の透過量が多くなり遮断部材として
作用しなくなる。これは従来用いられた成形用樹
脂に黒色願料を混合して得た黒色樹脂に関しても
言え、特に遮断部材を１mm以下にした場合は上記
問題が顕著なものとなつてくる。 By the way, in the detection device section 1 produced by molding as described above, the gap between the light source 2 and the light receiving element 3 is generally relatively narrow, being 5 mm or less, or even several mm. Therefore, the thickness of the blocking member 4 interposed between these elements is further reduced, and a thin metal plate is used as the material. By the way, if the shape of the shutoff unit 5 is small and complicated, or if consideration is given to reducing the number of assembly steps and manufacturing costs, it is advantageous to mold the shutoff member from resin as well. However, when conventional resin is molded into a thin plate of several millimeters or less, the amount of permeation increases and it no longer functions as a blocking member. This also applies to the black resin obtained by mixing a black coating material with a conventionally used molding resin, and the above-mentioned problem becomes particularly noticeable when the thickness of the blocking member is 1 mm or less.
本考案の目的は上記従来技術の問題点を解決す
ることにあり、樹脂により極薄状の遮断部材を実
現することである。 The purpose of the present invention is to solve the problems of the prior art described above, and to realize an ultra-thin blocking member using resin.
上記の目的を達成する本考案は、上記光路遮断
部材を光拡散部材を含む樹脂で構成し、該遮断部
材を外部の駆動力により上記光路を遮るか、又は
光路から離脱させることにより物体の変位量を検
知するものである。本考案によりランプCdSを用
いた多光量タイプの光電検出装置においても、上
記遮断部材を従来のものより厚くすることなくモ
ールド成形することが可能となり、更に発光ダイ
オード等の少光量タイプの光電検出装置において
も、これら素子間に介在させることが可能な遮断
部材を樹脂により成形することができる。これに
より組立工程数の低下による製作費の低減、安価
な小型光電検出装置の実言が可能となる。 In order to achieve the above object, the present invention comprises the optical path blocking member made of a resin containing a light diffusing member, and the blocking member blocks the optical path using an external driving force or is moved away from the optical path to displace the object. It detects the amount. This invention makes it possible to mold the above-mentioned blocking member without making it thicker than conventional ones even in high-light-intensity type photoelectric detection devices using lamp CdS, and also in low-light-intensity type photoelectric detection devices such as light-emitting diodes. Also, a blocking member that can be interposed between these elements can be molded from resin. This makes it possible to reduce manufacturing costs by reducing the number of assembly steps, and to realize an inexpensive, compact photoelectric detection device.
本考案の実施例においては上記第１図に示した
遮断ユニツト５を製作してみた。実際には光源と
受光素子との間隙が３mmであつたため１mmの遮断
部材４を有する遮断ユニツト５をモールド成形す
ることにした。材料にはホルムアルデヒド重合体
であるポリアセタール樹脂（商品名：デルリン）
１c.c.に対し、直径７〜９μの球状の光拡散効果を
有するグラスフアイバを約0.5ｇ添加した。その
結果、遮断部材４が１mm以下0.5mmとなつても通
常の発光ダイオードの光を遮断することができ
た。 In an embodiment of the present invention, the shutoff unit 5 shown in FIG. 1 was manufactured. Actually, since the gap between the light source and the light receiving element was 3 mm, it was decided to mold the blocking unit 5 having the blocking member 4 of 1 mm. The material is polyacetal resin (product name: Delrin), which is a formaldehyde polymer.
Approximately 0.5 g of glass fiber having a spherical light-diffusing effect with a diameter of 7 to 9 μm was added to 1 c.c. As a result, even if the blocking member 4 was 1 mm or less and 0.5 mm thick, it was possible to block light from a normal light emitting diode.
なお、上記実施例に用いた樹脂以外でも、従来
からモールド成形が可能な樹脂であれば、上記の
如く遮光機能がなくとも光拡散部材との併用によ
り使用可能となる。更に光を吸収する上記のよう
な黒等の願料を併用すれば更に良い効果を得るこ
とができる。なお上記遮断部材の作動は回転運動
に限られず、往復移動によることもあるのは言う
までもない。 In addition to the resins used in the above embodiments, any resin that can be conventionally molded can be used in combination with the light diffusing member even if it does not have a light shielding function as described above. Furthermore, even better effects can be obtained by using a coating material such as the above-mentioned black which absorbs light. It goes without saying that the operation of the blocking member is not limited to rotational movement, but may also be reciprocating movement.
第１図は光遮断装置及びユニツトの斜視図で、
図中２は光源、３は受光素子、４は遮断部材、５
は遮断ユニツトを示す。
Figure 1 is a perspective view of the light blocking device and unit.
In the figure, 2 is a light source, 3 is a light receiving element, 4 is a blocking member, and 5
indicates a cut-off unit.
Claims (1)
源と受光素子間の光路を遮断する位置に移動可能
な光路遮断部材を有する透過型光電検出装置にお
いて、 上記光路遮断部材を光拡散部材を含む樹脂で構
成し、該遮断部材を上記光路を遮るか、又は光路
から離脱させることにより検知することを特徴と
する光電検出装置。[Scope of Claim for Utility Model Registration] A transmission type photoelectric detection device having a light source, a light receiving element corresponding to the light source, and an optical path blocking member movable to a position to block the optical path between the light source and the light receiving element, A photoelectric detection device characterized in that the member is made of a resin containing a light diffusing member, and detection is performed by blocking the optical path with the blocking member or separating the optical path from the optical path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP778779U JPS6120541Y2 (en) | 1979-01-23 | 1979-01-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP778779U JPS6120541Y2 (en) | 1979-01-23 | 1979-01-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55106813U JPS55106813U (en) | 1980-07-25 |
| JPS6120541Y2 true JPS6120541Y2 (en) | 1986-06-20 |
Family
ID=28815927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP778779U Expired JPS6120541Y2 (en) | 1979-01-23 | 1979-01-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6120541Y2 (en) |
-
1979
- 1979-01-23 JP JP778779U patent/JPS6120541Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55106813U (en) | 1980-07-25 |
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