JP2544237Y2 - Photo interrupter - Google Patents
Photo interrupterInfo
- Publication number
- JP2544237Y2 JP2544237Y2 JP1841490U JP1841490U JP2544237Y2 JP 2544237 Y2 JP2544237 Y2 JP 2544237Y2 JP 1841490 U JP1841490 U JP 1841490U JP 1841490 U JP1841490 U JP 1841490U JP 2544237 Y2 JP2544237 Y2 JP 2544237Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- receiving element
- light receiving
- emitting element
- light emitting
- 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 - Lifetime
Links
Description
【考案の詳細な説明】 （イ）産業上の利用分野 本考案は、発光素子と受光素子を対向させて保持し、
その光路を横切る物体の検出に好適なホトインタラプタ
に関する。[Detailed description of the invention] (a) Industrial application field The invention holds a light emitting element and a light receiving element facing each other,
The present invention relates to a photointerrupter suitable for detecting an object crossing the optical path.
（ロ）従来の技術 従来より半導体素子を用いたホトインタラプタは、特
開昭57−62574号公報等に示されているが、第２図に示
す様に略凹字状のケース体15を用いて発光素子11と受光
素子12を対向保持し、ケース体15の内側に対向して設け
られたスリット16、17を介して光の授受を行い、その光
路を遮ぎる物体等の通過を検出している。2. Description of the Related Art A conventional photointerrupter using a semiconductor element is disclosed in Japanese Patent Application Laid-Open No. 57-62574, etc., but uses a substantially concave case body 15 as shown in FIG. The light emitting element 11 and the light receiving element 12 are held opposite to each other, and light is transmitted and received through slits 16 and 17 provided inside the case body 15 so as to detect the passage of an object or the like that interrupts the optical path. ing.
（ハ）考案が解決しようとする課題 斯る構成において、物体等がその光路を遮る時の感度
を敏感にするには、スリット16、17の幅を狭くする必要
があり、例えば２インチフロッピーディスク装置の位置
検出を他のスイッチ手段の併用なくホトインタラプタの
みで行う場合には、0.1mmの分解能が要求される。(C) Problems to be Solved by the Invention In such a configuration, in order to increase the sensitivity when an object or the like blocks the optical path, the width of the slits 16 and 17 needs to be reduced. When the position of the device is detected only by the photointerrupter without using other switch means, a resolution of 0.1 mm is required.
しかしケース体15の樹脂成形において、成型金型は樹
脂の圧力に耐えなければならないから、スリット16、17
の幅を狭くすることが出来ず、一般に0.20mm程度が成型
限界とされていた。However, in the resin molding of the case body 15, since the molding die must withstand the pressure of the resin, the slits 16 and 17 are formed.
It was not possible to reduce the width of the mold, and generally the molding limit was about 0.20 mm.
さらに、スリット16、17の幅が狭くなると、その間隙
等に塵埃がたまりやすく、光検出出力が早期低下した
り、検出誤動作を生じやすくなる。Further, when the widths of the slits 16 and 17 are reduced, dust easily accumulates in the gaps and the like, and the light detection output is reduced at an early stage and a detection malfunction is likely to occur.
（ニ）課題を解決するための手段 本考案は上述の点を考慮してなされたもので、ケース
体のスリットとして、発光素子と受光素子とを結ぶ直線
（いわゆる光軸中心線）と交叉する中心軸をもつ傾斜し
たスリットを設けたもので、より好ましくは発光素子側
のスリットの傾斜方向と受光素子側のスリットの傾斜方
向を同方向としたものである。(D) Means for Solving the Problems The present invention has been made in view of the above points, and intersects a straight line (so-called optical axis center line) connecting the light emitting element and the light receiving element as a slit of the case body. An inclined slit having a central axis is provided, and more preferably, the inclined direction of the slit on the light emitting element side and the inclined direction of the slit on the light receiving element side are the same.
（ホ）作用 これによりスリット幅は広くてもスリットを形成する
ケース体突出部により有効光束幅が狭められて分解能が
高くなる。(E) Action As a result, even if the slit width is wide, the effective light beam width is narrowed by the case body projecting portion forming the slit, and the resolution is increased.
（へ）実施例 第１図は本考案実施例のホトインタラプタの断面図
で、（１）（２）は各々GaAs,GaP等からなる発光素子と
Si等からなる受光素子で、図の紙面に垂直な方向に延在
するリード線（３）に載置配線されている。これらの発
光素子（１）と受光素子（２）は必要に応じて可視光遮
断特性をもつ透光性の樹脂（４）で各々が覆われてお
り、光授受面に凸レンズ若しくはフレネルレンズ又は凹
レンズ等のレンズ手段を有してもよい。(F) Embodiment FIG. 1 is a cross-sectional view of a photointerrupter according to an embodiment of the present invention, wherein (1) and (2) show light emitting elements made of GaAs, GaP, etc., respectively.
A light receiving element made of Si or the like is mounted and wired on a lead wire (3) extending in a direction perpendicular to the sheet of the drawing. Each of the light emitting element (1) and the light receiving element (2) is covered with a translucent resin (4) having a visible light blocking characteristic as necessary, and a convex lens, a Fresnel lens, or a concave lens is provided on the light transmitting / receiving surface. And the like.
（５）は樹脂成型品等からなるケース体で、側面略凹
字状をなし、図はその略凹字状突起部断面と底面橋絡部
を示している。このケース体（５）には上述した発光素
子（１）と受光素子（２）が対向するよう略凹字状突起
部に各々紙面裏側より圧入又は挿入係止され、ケース体
（５）には略凹字状突起部の内面対向部にスリット（透
孔）（６）（７）が設けてあるので、発光素子（１）と
受光素子（２）は光の授受を行うことができる。(5) is a case body made of a resin molded product or the like, and has a substantially concave side surface, and the figure shows a cross section of the substantially concave projection portion and a bottom bridge portion. The light-emitting element (1) and the light-receiving element (2) are press-fitted or inserted into the substantially concave protrusions from the back side of the paper so that the light-emitting element (1) and the light-receiving element (2) face each other. Since the slits (through holes) (6) and (7) are provided on the inner surface facing portions of the substantially concave projections, the light emitting element (1) and the light receiving element (2) can transmit and receive light.
この様な透孔付ケース体（５）は例えば実開昭53−12
6484号公報に詳細に開示されているが、本願において特
長的な事は、このスリット（６）（７）が傾斜している
事である。即ちスリット（６）（７）は紙面に垂直な方
向に直線的に設けられているが、その幅方向において、
図の如く、発光ダイオード（１）と受光素子（２）とを
結ぶ直線（光軸中心軸）と交叉する中心軸をもつよう
に、スリット（６）（７）を傾斜させたことである。こ
れにより、発光素子（１）から受光素子（２）に向う光
束は、スリットの幅に関わらず傾斜したスリット（６）
（７）の突出部によって制限され、光の授受に寄与する
ものは実質的に細い光束となる。Such a case body with a through hole (5) is described in, for example,
Although disclosed in detail in Japanese Patent No. 6484, a characteristic of the present application is that the slits (6) and (7) are inclined. That is, the slits (6) and (7) are provided linearly in a direction perpendicular to the paper surface, but in the width direction,
As shown in the drawing, the slits (6) and (7) are inclined so as to have a central axis crossing a straight line (optical axis central axis) connecting the light emitting diode (1) and the light receiving element (2). As a result, the luminous flux from the light emitting element (1) to the light receiving element (2) is changed regardless of the width of the slit (6).
What is constrained by the projection of (7) and contributes to the transmission and reception of light is a substantially thin light beam.
上述の例において、光軸中心軸に対するスリット中心
軸の方向は、同一方向でかつ略平行となる場合を例示し
たが、略平行である必要はないものの同一方向の方が好
ましい。その理由は、斯る発光素子（１）の放出光や受
光素子（２）の受光光は樹脂（４）やレンズの有無に関
わらず広がりをもつので、スリット中心軸の傾斜方向が
異なる方向に略八字状に配置された場合、八字状の広が
り方向から被検出物が進入してきた場合には検出精度よ
く受光素子（２）の出力変化が得られるが、八字状の狭
い方から被検出物が受発光素子間に侵入してきた場合に
は被検出物の先端における光反射によって受光素子
（２）が応答してしまう可能性が高いからである。In the above-described example, the case where the directions of the slit central axis with respect to the optical axis central axis are the same direction and are substantially parallel has been exemplified. The reason is that the emitted light of the light emitting element (1) and the received light of the light receiving element (2) have a spread regardless of the presence or absence of the resin (4) or the lens. In the case of a substantially eight-shaped arrangement, the output of the light receiving element (2) can be changed with high detection accuracy when the object enters from the eight-character spread direction. This is because if light enters between the light receiving and emitting elements, there is a high possibility that the light receiving element (2) will respond due to light reflection at the tip of the detected object.
（ト）考案の効果 上述の如く本考案は、ケース体のスリットそのものは
0.3〜1.5mmと広くても、実質的に授受に必要な光束を絞
ることが出来るので、幅0.1mm以下の分解能を得ること
ができる。さらにスリットの幅自体は広いので、検出誤
差を与える程には塵埃はたまらない。(G) Effect of the present invention As described above, in the present invention, the slit itself of the case body is
Even if it is as wide as 0.3 to 1.5 mm, it is possible to substantially narrow down the luminous flux required for transmission and reception, so that a resolution of 0.1 mm or less in width can be obtained. Further, since the width of the slit itself is wide, dust does not accumulate enough to give a detection error.
第１図は本考案実施例のホトインタラプタの断面図、第
２図は従来のホトインタラプタの断面図である。 （１）…発光素子、（２）…受光素子、（３）…リード
線、（４）…樹脂、（５）…ケース体、（６）（７）…
スリット。FIG. 1 is a sectional view of a photointerrupter according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional photointerrupter. (1) Light-emitting element, (2) Light-receiving element, (3) Lead wire, (4) Resin, (5) Case, (6) (7)
slit.
Claims (1)
と受光素子を対向させて保持するケース体とを有したホ
トインタラプタにおいて、前記ケース体は、前記発光素
子と受光素子とを結ぶ直線と交叉する中心軸をもつ傾斜
したスリットを具備した事を特徴とするホトインタラプ
タ。1. A photointerrupter having a light emitting element, a light receiving element, and a case body for holding the light emitting element and the light receiving element facing each other, wherein the case body is a straight line connecting the light emitting element and the light receiving element. A photo-interrupter having an inclined slit having a central axis intersecting with the photo-interrupter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1841490U JP2544237Y2 (en) | 1990-02-26 | 1990-02-26 | Photo interrupter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1841490U JP2544237Y2 (en) | 1990-02-26 | 1990-02-26 | Photo interrupter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03109358U JPH03109358U (en) | 1991-11-11 |
| JP2544237Y2 true JP2544237Y2 (en) | 1997-08-13 |
Family
ID=31521573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1841490U Expired - Lifetime JP2544237Y2 (en) | 1990-02-26 | 1990-02-26 | Photo interrupter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2544237Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5493674B2 (en) * | 2009-10-13 | 2014-05-14 | セイコーエプソン株式会社 | Photodetector, optical position detection device, and display device with position detection function |
| JP6010842B2 (en) * | 2012-06-26 | 2016-10-19 | 豊丸産業株式会社 | Photosensor support member and gaming machine provided with the photosensor support member |
-
1990
- 1990-02-26 JP JP1841490U patent/JP2544237Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03109358U (en) | 1991-11-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |