JPH065909A - Photo-interrupter - Google Patents
Photo-interrupterInfo
- Publication number
- JPH065909A JPH065909A JP16263592A JP16263592A JPH065909A JP H065909 A JPH065909 A JP H065909A JP 16263592 A JP16263592 A JP 16263592A JP 16263592 A JP16263592 A JP 16263592A JP H065909 A JPH065909 A JP H065909A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light emitting
- light receiving
- housing
- 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.)
- Granted
Links
Landscapes
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
Abstract
(57)【要約】 （修正有）
【目的】 表面実装技術（ＳＭＴ）により発光素子及び
受光素子がプリント基板上に同一方向に装着されていて
も、発光素子からの光を受光素子が受光できるような構
造にした。
【構成】 赤外線透過性樹脂からなるハウジング１の上
端部に相対向する一対の突起部２を備え、これらの一側
面の所定の箇所に取付孔３を対称的に設け、ハウジング
１内に配設したＳＭＴ用プリント基板５は前記突起部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
が接続されている。また、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、
これらと対向する面に同発光素子８からの光を受光素子
９に導くための反射面１１を設けた反射板１０を取付け
る。
(57) [Summary] (Modified) [Purpose] Even if the light emitting element and the light receiving element are mounted on the printed circuit board in the same direction by the surface mounting technology (SMT), the light receiving element can receive the light from the light emitting element. It has a structure like this. A pair of protrusions 2 facing each other is provided at an upper end of a housing 1 made of an infrared permeable resin, and mounting holes 3 are symmetrically provided at predetermined positions on one side surface of the housing 1, and the mounting holes 3 are disposed in the housing 1. The printed circuit board 5 for SMT is the protrusion 2
Corresponding to the above, the upper end is provided with the convex portion 6, and the lower end is connected with the lead. Also, so as to face the mounting hole 3,
The light emitting element 8 and the light receiving element 9, which are chip parts, are attached to the convex portions 6 provided on the printed circuit board 5,
A reflecting plate 10 having a reflecting surface 11 for guiding the light from the light emitting element 8 to the light receiving element 9 is attached to the surface facing these.
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、光経路の反射板の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photo interrupter, and more particularly to a structure of a reflection plate in an optical path.
【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に示すよ
うにハウジング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
どに使用されている。従来のフォトインタラプタにおい
ては、発光部１４と受光部１５が向かい合った構造であ
るため、発光素子及び受光素子であるディスクリート部
品をプリント配線基板１８上にそれぞれを実装する方式
が一般的に採用されている。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、発光素子及び受光素子であ
るチップ部品は、プリント基板上の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 called photoelectric conversion, and a photoelectric conversion element having a light emitting portion and a light receiving portion which are electrically insulated and coupled by light is called an optical conversion element. It is called a coupling element, and the optical coupling element is roughly classified into a photo coupler, a photo interrupter, and a photo sensor. 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 generally used.
As shown in FIG. 3, the photointerrupter, which is an optical coupling element, has a light emitting portion 14 and a light receiving portion 15 opposed to each other in a pair of protrusions provided at a predetermined interval on the upper end of a housing 16. It has a structure that can detect objects located between the protrusions through the transmission holes 17 formed on the surfaces of the protrusions facing each other. It is used in intended devices. In the conventional photo interrupter, since the light emitting section 14 and the light receiving section 15 face each other, a method of mounting discrete components, which are the light emitting element and the light receiving element, on the printed wiring board 18 is generally adopted. There is. In order to mass-produce these devices at a low cost, a method using SMT (surface mounting technology) in which a chip component element is mounted on a printed board and a reflow soldering process is performed is excellent. However,
In the method using the SMT, the chip parts, which are the light emitting element and the light receiving element, are mounted at the positions facing the same direction on the printed circuit board. Therefore, in this structure, the light receiving section directly receives the light from the light emitting section. There is a problem that can not be done.
【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、発光部と受
光部が相対向したと同等の構造となるようなフォトイン
タラプタ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 in a method using SMT, a light emitting element and a light receiving element mounted in the same direction on a printed circuit board. The present invention provides a photointerrupter having the same structure as that of the light emitting portion and the light receiving portion facing each other in the state.
【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、同突起部の一側面の所定の位置に
取付孔を設けた赤外線透過性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取付けた反射板とからな
り、同反射板の前記発光素子及び受光素子と対向する面
に同発光素子からの光を受光素子に導くための反射面を
もうけてなる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。In order to solve the above-mentioned problems, the present invention comprises a pair of projecting portions at the upper end portion which face each other with a required space, and a predetermined side surface of the projecting portion is provided. A housing made of an infrared-transparent resin having a mounting hole at a position, and projections corresponding to the projections on both sides of the upper end,
A printed circuit board for SMT disposed in the housing,
A light emitting element and a light receiving element respectively attached to the convex portions of the printed circuit board so as to face the mounting holes of the protrusions,
A reflecting plate attached to each of the mounting holes of the protrusions, and a reflecting surface for guiding light from the light emitting element to the light receiving element is provided on a surface of the reflecting plate facing the light emitting element and the light receiving element. The present invention provides a photo interrupter characterized by the above.
【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反射板の反射面にて反射し、この
反射した光はハウジングの一方の突起部の壁面を透過し
て、ハウジングの外を通って再びハウジングの他方の突
起部の壁面を透過して他方の取付孔に設けた反射板の反
射面にて反射し、この反射した光が受光素子で受光され
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。With the above construction, in the photo interrupter according to the present invention, the light emitted from the light emitting element is reflected by the reflecting surface of the reflecting plate provided in one mounting hole, and this reflected light is reflected by the housing. The light passes through the wall surface of one of the protrusions, passes through the outside of the housing, again passes through the wall surface of the other protrusion of the housing, and is reflected by the reflection surface of the reflection plate provided in the other mounting hole. Since the light is received by the light receiving element, the light from the light emitting element can be received by the light receiving element even when the light emitting element and the light receiving element are mounted on the printed circuit board in positions facing in the same direction.
【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は赤外線透過性樹脂からなるハ
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
の光を受光素子９に導くための反射面１１設けた反射板
１０を取付ける。反射板１０を取付孔３に取付けるに
は、反射板１０に設けた傾斜している反射面１１が相対
向する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
する光は一方の反射板１０の反射面１１で反射し、この
反射した光はハウジング１の一方の突起部２の壁面を透
過して、ハウジング１の外を通って再びハウジング１の
他方の突起部２の壁面を透過して他方の反射板１０の反
射面１１で反射し、この反射した光は受光素子９で受光
される。なお、前記の赤外線透過性樹脂からなるのハウ
ジングにおいて、光の経路となる部分のみに赤外線透過
性樹脂の部材を用いることにより使用部材のコストダウ
ンが可能となる。Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a perspective view of an embodiment of the photo interrupter according to the present invention, and FIG. 2 is a cross-sectional view of a main part of the embodiment of the photo interrupter according to the present invention.
2A is a plan sectional view of a main part, and FIG. 2B is a side sectional view of the main part. In the figure, reference numeral 1 denotes a housing made of an infrared permeable resin, which has a pair of projecting portions 2 facing each other at its upper end portion, and mounting holes 3 are symmetrically provided at predetermined positions on one side surface of the projecting portion 2. Mounting parts 4 are provided on both sides, and 5 is a printed circuit board for SMT arranged in the housing 1, and is provided with a convex part 6 at the upper end corresponding to the projecting part 2.
The lead 7 is connected to the lower end. Further, so as to face the mounting hole 3 provided on one side surface of the housing 1,
The light emitting element 8 and the light receiving element 9 which are chip parts are attached to the convex portion 6 provided on the printed circuit board 5, respectively, and further, the light emitting element 8 and the light receiving element 9 are opposed to the attachment hole 3 of the housing 1. The reflecting plate 10 provided with the reflecting surface 11 for guiding the light from the light emitting element 8 to the light receiving element 9 is attached to the surface to be reflected. In order to mount the reflection plate 10 in the mounting hole 3, the reflection plates 10 are symmetrically inserted into the mounting holes 3 so that the inclined reflecting surfaces 11 provided on the reflection plate 10 face each other.
This is performed by adhering the flange portion to the inside of the mounting hole 3. Regarding the path of the light, first, the light emitted from the light emitting element 8 is reflected by the reflecting surface 11 of the one reflecting plate 10, and the reflected light is transmitted through the wall surface of the one protruding portion 2 of the housing 1, and the housing 1 Through the outside of the housing 1 and again through the wall surface of the other protruding portion 2 of the housing 1 to be reflected by the reflecting surface 11 of the other reflecting plate 10, and the reflected light is received by the light receiving element 9. In the housing made of the infrared transparent resin, the cost of the used member can be reduced by using the member of the infrared transparent resin only in the portion which becomes the light path.
【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反射板の反射面にて反射し、こ
の反射した光はハウジングの一方の突起部の壁面を透過
して、ハウジングの外を通って再びハウジングの他方の
突起部の壁面を透過して他方の取付孔に設けた反射板の
反射面にて反射し、この反射した光が受光素子で受光さ
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。As described above, in the photo interrupter according to the present invention, the light emitted from the light emitting element is reflected by the reflecting surface of the reflecting plate provided in one mounting hole, and the reflected light is stored in the housing. After passing through the wall surface of one of the protrusions, passing through the outside of the housing again and transmitting through the wall of the other protrusion of the housing, the light is reflected by the reflecting surface of the reflection plate provided in the other mounting hole. Since the received light is received by the light receiving element, the light from the light emitting element can be received by the light receiving element even when the light emitting element and the light receiving element are mounted on the printed circuit board in positions facing in the same direction. It is possible to mass-produce at low cost by the method using SMT.
【図１】本発明によるフォトインタラプタの構造の一実
施例の斜視図である。FIG. 1 is a perspective view of an embodiment of the structure of a photo interrupter according to the present invention.
【図２】本発明によるフォトインタラプタの構造の一実
施例の要部断面図である。FIG. 2 is a cross-sectional view of essential parts of an embodiment of the structure of the photo interrupter according to the present invention.
【図３】従来のフォトインタラプタの構造の一例の要部
断面図である。FIG. 3 is a main-portion cross-sectional view of an example of a structure of a conventional photo interrupter.
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 反射板 １１ 反射面 1 Housing 2 Protrusion 3 Mounting Hole 4 Mounting 5 Printed Circuit Board 6 Convex 7 Lead 8 Light Emitting Element 9 Light Receiving Element 10 Reflector 11 Reflective Surface
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
取付孔を設けた赤外線透過性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取付けた反射板とからな
り、同反射板の前記発光素子及び受光素子と対向する面
に同発光素子からの光を受光素子に導くための反射面を
もうけてなることを特徴とするフォトインタラプタ。1. A housing made of an infrared-transparent resin, which has a pair of protrusions at an upper end portion thereof and is opposed to each other with a required space, and has a mounting hole formed at a predetermined position on one side surface of the protrusions. Providing protrusions corresponding to the protrusions on both sides of the upper end,
A printed circuit board for SMT disposed in the housing,
A light emitting element and a light receiving element respectively attached to the convex portions of the printed circuit board so as to face the mounting holes of the protrusions,
A reflecting plate attached to each of the mounting holes of the protrusions, and a reflecting surface for guiding light from the light emitting element to the light receiving element is provided on a surface of the reflecting plate facing the light emitting element and the light receiving element. A photo interrupter characterized in that.
る部分にのみ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 an infrared transparent resin is used only in a portion of the housing that serves as a light path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16263592A JP2800170B2 (en) | 1992-06-22 | 1992-06-22 | Photo-interrupter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16263592A JP2800170B2 (en) | 1992-06-22 | 1992-06-22 | Photo-interrupter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH065909A true JPH065909A (en) | 1994-01-14 |
| JP2800170B2 JP2800170B2 (en) | 1998-09-21 |
Family
ID=15758365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16263592A Expired - Lifetime JP2800170B2 (en) | 1992-06-22 | 1992-06-22 | Photo-interrupter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2800170B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4830132A (en) * | 1985-10-14 | 1989-05-16 | Toyota Jidosha Kabushiki Kaisha | Four wheel drive power transmission system skidding control device and method |
-
1992
- 1992-06-22 JP JP16263592A patent/JP2800170B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4830132A (en) * | 1985-10-14 | 1989-05-16 | Toyota Jidosha Kabushiki Kaisha | Four wheel drive power transmission system skidding control device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2800170B2 (en) | 1998-09-21 |
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