JP2800172B2 - Photo-interrupter - Google Patents
Photo-interrupterInfo
- Publication number
- JP2800172B2 JP2800172B2 JP19366792A JP19366792A JP2800172B2 JP 2800172 B2 JP2800172 B2 JP 2800172B2 JP 19366792 A JP19366792 A JP 19366792A JP 19366792 A JP19366792 A JP 19366792A JP 2800172 B2 JP2800172 B2 JP 2800172B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- receiving element
- lens
- printed circuit
- emitting element
- 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
Landscapes
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はフォトインタラプタに係
り、光経路にレンズ板を設けて反射型を作り込む構造に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photo interrupter, and more particularly to a structure in which a lens plate is provided in an optical path to form a reflection type.
【０００２】[0002]
【従来の技術】光を電気へ或いは電気を光への変換を総
称して光電変換と呼び、電気的には絶縁され、光で結合
されている発光部と受光部をもつ光電変換素子を光結合
素子といっており、光結合素子はフォトカプラ、フォト
インタラプタ、フォトセンサに大別される。いずれの素
子でも発光部は赤外発光ダイオード、受光部はシリコン
フォトトランジスタという組み合わせが一般的である。
光結合素子であるフォトインタラプタは、図３（Ａ）に
示すように一般的には透過型のセンサーであり、ハウジ
ング１６の上端部に所要の間隔を在して設けられた一対
の突起部内に、それぞれ発光部１４及びと受光部１５と
が相対向して配設され、突起部の相対向する面に形成し
た透過孔１７を通して、突起間に位置するものを検出す
ることができる構造となっており、モーターの回転数制
御、カード読取り装置やＦＡを目的とした装置などに使
用されていが、図３（Ｂ）に示すように反射型もある。
反射型においては、図に示すように 左右に対称に設け
られた内側に傾斜した凹部内に、それぞれ発光部２４及
び受光部２５が配設され、発光部２４から発生した光が
検出物１７に当たり、検出物１８で反射した光を受光部
２５が検出することができる構造となっており、検出物
が薄い紙や、プラスチックカードのように光をある程度
透過するものを透過型フォトインタラプタで検出すると
検出ミスが起こることがあり、この場合は反射型を使用
する。従来のフォトインタラプタにおいては、プリント
配線基板への実装はディスクリート部品である発光素子
及び受光素子をプリント配線基板にそれぞれを挿入し、
半田処理をする方式が一般的に採用されているが、これ
らをより量産的に、安価に生産するためにはチップ部品
化された発光素子及び受光素子をプリント基板に実装
し、リフロー半田付処理をするＳＭＴ（表面実装技術）
を利用した方式が優れている。ところが、ＳＭＴを利用
した方式では、チップ部品である発光素子及び受光素子
は、それぞれプリント基板上に同一方向に向いた位置に
装着されるため、この構造では発光部からの光を受光部
が直接受光するこが出来ないという問題点がある。2. Description of the Related Art The conversion of light into electricity or the conversion of electricity into light is collectively referred to as photoelectric conversion. A photoelectric conversion element having a light-emitting portion and a light-receiving portion which are electrically insulated and coupled by light is referred to as a photoelectric conversion device. It is called a coupling element, and the optical coupling element is roughly classified into a photocoupler, a photointerrupter, and a photosensor. In any element, a combination of an infrared light emitting diode as a light emitting portion and a silicon phototransistor as a light receiving portion is common.
The photo-interrupter, which is an optical coupling element, is generally a transmissive sensor as shown in FIG. 3 (A), and is provided in a pair of protrusions provided at an upper end of the housing 16 at a predetermined interval. The light-emitting unit 14 and the light-receiving unit 15 are disposed so as to face each other, and a structure located between the protrusions can be detected through the transmission holes 17 formed in the opposing surfaces of the protrusions. It is used for controlling the number of rotations of a motor, a card reader, an apparatus for FA, and the like, but there is also a reflection type as shown in FIG. 3 (B).
In the reflection type, a light emitting unit 24 and a light receiving unit 25 are provided in concave portions which are provided symmetrically to the left and right as shown in the figure, and light emitted from the light emitting unit 24 hits the detection object 17. The light receiving unit 25 has a structure in which the light reflected by the detection object 18 can be detected. When the detection object detects a light-transmitting light interrupter such as a thin paper or a plastic card with a transmission type photo interrupter. In some cases, a detection error occurs. In this case, the reflection type is used. In the conventional photo interrupter, the light emitting element and the light receiving element, which are discrete components, are mounted on the printed wiring board by inserting the light emitting element and the light receiving element into the printed wiring board,
The method of soldering is generally adopted, but in order to mass-produce them and to produce them at low cost, light-emitting elements and light-receiving elements made into chip parts are mounted on a printed circuit board, and reflow soldering processing is performed. SMT (Surface Mount Technology)
The method using is excellent. However, in the method using the SMT, the light emitting element and the light receiving element, which are chip components, are mounted on the printed circuit board at positions facing in the same direction. In this structure, the light from the light emitting section is directly received by the light receiving section. There is a problem that light cannot be received.
【０００３】[0003]
【発明が解決しようとする課題】本発明はこのような点
に鑑みなされたもので、ＳＭＴを利用した方式におい
て、プリント基板上の同一の方向に向いた位置に装着さ
れた発光素子及び受光素子の状態のままで、発光素子及
び受光素子が左右対称に内側に傾斜した位置に装着され
た状態と同等となるような反射型のフォトインタラプタ
の構造を提供するものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a light emitting element and a light receiving element mounted in a position facing the same direction on a printed circuit board in a system using SMT. In this state, a reflection type photointerrupter structure is provided which is equivalent to a state in which the light emitting element and the light receiving element are mounted symmetrically inwardly and inwardly.
【０００４】[0004]
【課題を解決するための手段】本発明は上述の課題を解
決するために、上端部に所要の間隔を在して相対向する
一対の突起部を備え、の同突起部の一側面の所定の位置
に取付孔を設けた樹脂からなるハウジングと、上ン端部
の両側に前記突起部に対応する凸部を備え、前記ハウジ
ング内に配設したＳにＭＴ用プリント基板と、前記突起
部の取付孔に対向するように、前記プリント基突板の凸
部にそれぞれ取付けた発光素子及び受光素子と、前記突
起部の取付孔にそズれぞれ前記発光素子及び受光素子と
対向するように取付けられ、同発光素子から素の光を検
出物に当て、検出物で反射した光を同受光素子に導く赤
外線透過性樹脂からなるレンズとから構成したことを特
徴とするフォトインタラプタを提供するものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a pair of opposing projections at a predetermined interval at an upper end, and a predetermined surface of one side of the projection. A housing made of a resin provided with mounting holes at the positions of: and a protrusion corresponding to the protrusion on both sides of the upper end, wherein a printed circuit board for MT is provided in S provided in the housing; The light emitting element and the light receiving element respectively attached to the projection of the printed base plate so as to face the mounting hole of the printed base plate, and the light emitting element and the light receiving element are respectively opposed to the mounting hole of the projection. A photointerrupter, comprising: a lens made of an infrared-transmissive resin that is attached and irradiates elementary light from the light-emitting element to a detection object and guides light reflected by the detection object to the light-receiving element. It is.
【０００５】[0005]
【作用】以上のように構成したので、本発明によるフォ
トインタラプタにおいては、発光素子から発光する光は
一方の取付孔に設けたレンズによって屈折して検出物に
当たり、この検出物からの反射光は他方の取付孔に設け
たレンズによって屈折することにより直進し、受光部に
て受光されるので、発光素子及び受光素子がプリント基
板上の同一方向に向いた位置に装着されていても、発光
素子からの光を受光素子に導くことが出来る。With the above construction, in the photointerrupter according to the present invention, the light emitted from the light emitting element is refracted by the lens provided in one of the mounting holes and hits the detected object, and the reflected light from the detected object is reflected by the light. Since the light travels straight by being refracted by the lens provided in the other mounting hole and is received by the light receiving unit, even if the light emitting element and the light receiving element are mounted in the same direction on the printed circuit board, the light emitting element Can be guided to the light receiving element.
【０００６】[0006]
【実施例】以下、図面に基づいて本発明による実施例を
詳細に説明する。図１は本発明によるフォトインタラプ
タの一実施例の斜視図であり、図２は本発明によるフォ
トインタラプタの一実施例の要部断面図であり、図２
（Ａ）は要部平面断面図、図２（Ｂ）は要部側面断面図
である。図において、１は樹脂からなるハウジングで、
上端部に相対向する一対の突起部２を備え、同突起部２
の一側面の所定の箇所に取付孔３を対称的に設け、また
両サイドに取付部４を設けてあり、５は前記ハウジング
１内に配設したＳＭＴ用プリント基板で、前記突起部２
に対応させて上端部に凸部６を備え、下端部にはリード
７が接続されている。また、前記ハウジング１の一側面
に設けた取付孔３に対向するように、前記プリント基板
５に備えられた凸部６にチップ部品である発光素子８及
び受光素子９がそれぞれ取付けられており、さらに、前
記ハウジング１の取付孔３に前記発光素子８及び受光素
子９と対向する面に、同発光素子８からの光を検出物１
１に当たるように屈折させるレンズ１０及び前記受光素
子９と対向する面に、検出物１１からの反射光を屈折さ
せて直進させるレンズ１０を取付ける。レンズ１０を取
付孔３に取付けるには、レンズ１０の厚い部分が内側を
向くように対称的に前記取付孔３にそれぞれ挿入し、フ
ランジ部分を前記取付孔３の内側に接着することにより
行う。光の経路については、まず発光素子８から発光す
る光は一方のレンズ１０屈折して検出物１１に当たり、
この検出物１１からの反射光は他方のレンズ１０で屈折
して直進し、受光素子９で受光される。なお、前記のハ
ウジングにおいて、光の経路となる部分のみ赤外線透過
性樹脂の部材を用い、前記の取付孔３に取付けたレンズ
１０の代わりに、鏡面の傾斜面を設けた反射板を傾斜面
が対向するように取付けることにより、透過型のフォト
インタラプタとすることが出来る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of one embodiment of a photointerrupter according to the present invention, and FIG. 2 is a sectional view of a main portion of one embodiment of a photointerrupter according to the present invention.
2A is a plan sectional view of a main part, and FIG. 2B is a side sectional view of a main part. In the figure, 1 is a housing made of resin,
An upper end is provided with a pair of opposing projections 2,
Mounting holes 3 are provided symmetrically at predetermined positions on one side surface, and mounting portions 4 are provided on both sides. Reference numeral 5 denotes an SMT printed circuit board disposed in the housing 1;
A projection 6 is provided at the upper end portion, and a lead 7 is connected to the lower end portion. Further, a light emitting element 8 and a light receiving element 9 as chip components are mounted on the convex portions 6 provided on the printed circuit board 5 so as to face the mounting holes 3 provided on one side surface of the housing 1, respectively. Further, the light from the light emitting element 8 is attached to the surface of the mounting hole 3 of the housing 1 which faces the light emitting element 8 and the light receiving element 9.
The lens 10 that refracts the reflected light from the detection object 11 and goes straight on the surface facing the light receiving element 9 and the lens 10 that refracts the light 1. The lens 10 is mounted in the mounting hole 3 by inserting the lens 10 symmetrically into the mounting hole 3 so that the thick portion of the lens 10 faces inward, and bonding the flange portion to the inside of the mounting hole 3. Regarding the light path, first, the light emitted from the light emitting element 8 is refracted by one of the lenses 10 and hits the detection object 11.
The reflected light from the detection object 11 is refracted by the other lens 10, travels straight, and is received by the light receiving element 9. In the housing, only a portion that becomes a light path uses an infrared transmissive resin member, and instead of the lens 10 attached to the attachment hole 3, a reflecting plate provided with a mirrored inclined surface is used. By mounting them so as to face each other, a transmission type photo interrupter can be obtained.
【０００７】[0007]
【発明の効果】以上に説明したように、本発明によるフ
ォトインタラプタにおいては、発光素子から発光する光
は一方の取付孔に設けたレンズにて屈折して検出物に当
たり、この検出物からの反射光は他方の取付孔に設けた
レンズにて屈折して受光部にて受光されるので、発光素
子及び受光素子がプリント基板上の同一方向に向いた位
置に装着されていても、発光素子からの光を受光素子で
受光することが出来るため、ＳＭＴを利用した方式によ
り量産的に、安価に生産することが出来る。なお、前記
のハウジングにおいて、光の経路となる部分のみ赤外線
透過性樹脂の部材を用い、前記の取付孔３に取付けたレ
ンズ１０の代わりに、鏡面の傾斜面を設けた反射板を傾
斜面が対向するように取付けることにより、透過型のフ
ォトインタラプタとすることが出来る。As described above, in the photointerrupter according to the present invention, the light emitted from the light emitting element is refracted by the lens provided in one of the mounting holes and hits the detection object, and is reflected from the detection object. Since light is refracted by the lens provided in the other mounting hole and received by the light receiving section, even if the light emitting element and the light receiving element are mounted in the same direction on the printed circuit board, the light is emitted from the light emitting element. Can be received by the light receiving element, so that it can be mass-produced inexpensively by a method using SMT. In the housing, only a portion of the housing that is a light path uses an infrared transmitting resin member, and instead of the lens 10 attached to the attachment hole 3, a reflecting plate having a mirrored inclined surface is used. By mounting them so as to face each other, a transmission type photo interrupter can be obtained.
【図１】本発明によるフォトインタラプタの一実施例の
斜視図である。FIG. 1 is a perspective view of one embodiment of a photointerrupter according to the present invention.
【図２】本発明によるフォトインタラプタの一実施例の
要部断面図である。FIG. 2 is a sectional view of a main part of one embodiment of a photointerrupter according to the present invention.
【図３】従来のフォトインタラプタの一例の要部断面図
である。FIG. 3 is a sectional view of a main part of an example of a conventional photointerrupter.
１ ハウジング ２ 突起部 ３ 取付孔 ４ 取付部 ５ プリント基板 ６ 凸部 ７ リード ８ 発光素子 ９ 受光素子 １０ レンズ １１ 検出物 DESCRIPTION OF SYMBOLS 1 Housing 2 Protrusion part 3 Mounting hole 4 Mounting part 5 Printed circuit board 6 Convex part 7 Lead 8 Light emitting element 9 Light receiving element 10 Lens 11 Detected object
Claims (2)
一対の突起部を備え、同突起部の一側面の所定の位置に
取付孔を設けた樹脂からなるハウジングと、上端部の両
側に前記突起部に対応する凸部を備え、前記ハウジング
内に配設したＳＭＴ用プリント基板と、前記突起部の取
付孔に対向するように、前記プリント基板の凸部にそれ
ぞれ取付けた発光素子及び受光素子と、前記突起部の取
付孔にそれぞれ前記発光素子及び受光素子と対向するよ
うに取付けられ、同発光素子からの光を検出物に当て、
検出物で反射した光を同受光素子に導く赤外線透過性樹
脂からなるレンズとから構成したことを特徴とするフォ
トインタラプタ。1. A housing made of a resin having a pair of projections facing each other at a predetermined interval at an upper end thereof, and having a mounting hole at a predetermined position on one side surface of the projections. SMT printed circuit boards provided on the both sides corresponding to the protrusions, the SMT printed circuit board disposed in the housing, and light emitting elements respectively mounted on the protrusions of the printed circuit board so as to face mounting holes of the protrusions. And light-receiving element, attached to the mounting hole of the protrusion so as to face the light-emitting element and light-receiving element, respectively, and shine light from the light-emitting element to a detection object,
A photointerrupter comprising: a lens made of an infrared-transmissive resin that guides light reflected by a detection object to the light-receiving element.
ズのみ可視光遮断の赤外線透過性樹脂を用いたことを特
徴とする請求項１記載のフォトインタラプタ。2. The photo-interrupter according to claim 1, wherein only a lens on a light receiving element side of the lens is made of an infrared transmitting resin that blocks visible light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19366792A JP2800172B2 (en) | 1992-07-21 | 1992-07-21 | Photo-interrupter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19366792A JP2800172B2 (en) | 1992-07-21 | 1992-07-21 | Photo-interrupter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0645638A JPH0645638A (en) | 1994-02-18 |
| JP2800172B2 true JP2800172B2 (en) | 1998-09-21 |
Family
ID=16311777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19366792A Expired - Lifetime JP2800172B2 (en) | 1992-07-21 | 1992-07-21 | Photo-interrupter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2800172B2 (en) |
-
1992
- 1992-07-21 JP JP19366792A patent/JP2800172B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0645638A (en) | 1994-02-18 |
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