JP2800171B2 - Photo-interrupter - Google Patents
Photo-interrupterInfo
- Publication number
- JP2800171B2 JP2800171B2 JP16263792A JP16263792A JP2800171B2 JP 2800171 B2 JP2800171 B2 JP 2800171B2 JP 16263792 A JP16263792 A JP 16263792A JP 16263792 A JP16263792 A JP 16263792A JP 2800171 B2 JP2800171 B2 JP 2800171B2
- Authority
- JP
- Japan
- Prior art keywords
- housing
- light
- inclined surface
- circuit board
- printed circuit
- 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 - Fee Related
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 light path reflector.
【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15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13と受光部
14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16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13と受光部14が向かい合った構造であ
るため、発光素子13及び受光素子14であるディスク
リート部品をプリント配線基板17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S
MT(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 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.
As shown in FIG. 3, the photo-interrupter, which is an optical coupling element, has a light-emitting portion 13 and a light-receiving portion 14 opposed to each other in a pair of protrusions provided at a predetermined interval on an upper end of a housing 15. It is arranged so that it can detect what is located between the projections through the transmission holes 16 formed on the opposing surfaces of the projections, and controls the rotation speed of the motor, the card reader and the FA. It is used for the intended equipment. In the conventional photointerrupter, since the light emitting unit 13 and the light receiving unit 14 face each other, a method of mounting discrete components, which are the light emitting element 13 and the light receiving element 14, on the printed wiring board 17 is generally adopted. Have been. In order to mass-produce these components at a low cost, mount the chip components into a printed circuit board and perform reflow soldering.
A method using MT (surface mounting technology) is excellent. However, in the method using SMT, the chip parts as the light emitting element and the light receiving element are mounted at the positions facing the same direction on the printed circuit board. In this structure, the light receiving section directly receives the light from the light emitting section. There is a problem that they cannot do this.
【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 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 photointerrupter having a structure equivalent to that of a light emitting unit and a light receiving unit facing each other is provided.
【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、同突起部の一側面に傾斜面を対称
的に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設け、前記ハ
ウジング内に配設したSMT用プリント基板と、前記ハ
ウジングの傾斜面に対向するように、前記プリント基板
の凸部にそれぞれ取り付けた発光素子及び受光素子と、
前記ハウジングの傾斜面に貼着けた反射板とからなるこ
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。According to the present invention, in order to solve the above-mentioned problems, a pair of protruding portions are provided at an upper end portion facing each other at a required interval, and an inclined surface is provided on one side surface of the protruding portions. A housing made of an infrared-transmissive resin provided symmetrically, a projection corresponding to the projection on both sides of the upper end, a printed circuit board for SMT disposed in the housing, and an inclined surface of the housing. A light-emitting element and a light-receiving element respectively attached to the convex portion of the printed board so as to face each other,
The present invention provides a photointerrupter comprising a reflector attached to an inclined surface of the housing.
【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
一方の傾斜面に取付けた反射板にて反射し、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傾斜面に取付けた反射板にて反射
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 photointerrupter according to the present invention, the light emitted from the light emitting element is reflected by the reflector attached to one of the inclined surfaces, and the reflected light is reflected on one of the protrusions of the housing. Through the wall of the housing, pass through the outside of the housing, pass through the wall of the other protrusion of the housing again, and are reflected by the reflector attached to the other inclined surface. The reflected light is received by the light receiving element. Therefore, even if the light emitting element and the light receiving element are mounted on the printed circuit board at positions facing in the same direction, light from the light emitting element can be received by 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、3を
備え、同突起部の一側面に傾斜面4、5を対称的に設
け、両サイドに取付孔を有する取付部6を設けてあり、
7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、3に対応させて上端部に凸部8を
設け、下端部にはリード9が接続されている。また、前
記ハウジング1の傾斜面4、5に対向するように、前記
プリント基板7に設けられた凸部8にチップ部品である
発光素子10及び受光素子11がそれぞれ取付けられて
おり、さらに、前記ハウジング1の傾斜面4、5に光を
反射させる反射板12が貼着けてある。光の経路につい
ては、先ず発光素子11から発光する光は傾斜面4で反
射し、この反射した光はハウジング1の突起部2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
の突起部3の壁面を透過して傾斜面5で反射し、この傾
斜面5で反射した光は受光素子11で受光される。な
お、前記のハウジング1の傾斜面4、5における反射板
12の貼着けを外側から行うと、ハウジングの内側を単
純な構造とすることが出来るため、割り型を使わないで
ハウジングの成形加工をすることが出来る。また、前記
の赤外線透過性樹脂製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製の部材を用いるこ
とにより使用部材のコストダウンが可能となる。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, reference numeral 1 denotes a housing made of an infrared transmitting resin, which is provided with a pair of opposing projections 2 and 3 at the upper end, and symmetrically provided with inclined surfaces 4 and 5 on one side of the projections. Is provided with a mounting portion 6 having a mounting hole,
Reference numeral 7 denotes a printed circuit board for SMT disposed in the housing 1. A projection 8 is provided at an upper end corresponding to the protrusions 2 and 3, and a lead 9 is connected to a lower end. Further, a light emitting element 10 and a light receiving element 11, which are chip components, are mounted on the convex portions 8 provided on the printed circuit board 7 so as to face the inclined surfaces 4, 5 of the housing 1, respectively. A reflecting plate 12 that reflects light is attached to the inclined surfaces 4 and 5 of the housing 1. Regarding the light path, first, the light emitted from the light emitting element 11 is reflected by the inclined surface 4, and the reflected light passes through the wall surface of the projection 2 of the housing 1, passes through the outside of the housing 1, and returns to the housing 1.
The light transmitted through the wall surface of the projection 3 is reflected by the inclined surface 5, and the light reflected by the inclined surface 5 is received by the light receiving element 11. If the reflection plate 12 is attached to the inclined surfaces 4 and 5 of the housing 1 from the outside, the inside of the housing can be made a simple structure, so that the housing can be formed without using a split mold. You can do it. Further, in the above-mentioned housing made of the infrared-transmissive resin, by using the member made of the infrared-transmissive resin only for a portion that becomes a light path, the cost of the members used can be reduced.
【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
は一方の傾斜面に取付けた反射板にて反射し、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傾斜面に取付けた反射板にて反
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ため、SMT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 photointerrupter according to the present invention, the light emitted from the light emitting element is reflected by the reflector attached to one of the inclined surfaces, and the reflected light is reflected on one side of the housing. Through the wall of the projection,
The light passes through the outside of the housing, passes through the wall surface of the other protrusion of the housing again, and is reflected by the reflector attached to the other inclined surface. The reflected light is received by the light receiving element. Even if the elements are mounted in the same direction on the printed circuit board, the light from the light emitting element can be received by the light receiving element.
It can be produced at low cost.
【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 one embodiment of the structure 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構造の一実
施例の要部断面図である。FIG. 2 is a cross-sectional view of a main part of one embodiment of the structure of the photointerrupter 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 sectional view of a main part of an example of the structure of a conventional photointerrupter.
1 ハウジング 2 突起部 3 突起部 4 傾斜面 5 傾斜面 6 取付部 7 プリント基板 8 凸部 9 リード 10 発光素子 11 受光素子 12 反射板 DESCRIPTION OF SYMBOLS 1 Housing 2 Projection part 3 Projection part 4 Inclined surface 5 Inclined surface 6 Mounting part 7 Printed circuit board 8 Convex part 9 Lead 10 Light emitting element 11 Light receiving element 12 Reflector
Claims (3)
一対の突起部を備え、同突起部の一側面に傾斜面を対称
的に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設け、前記ハ
ウジング内に配設したSMT用プリント基板と、前記ハ
ウジングの傾斜面に対向するように、前記プリント基板
の凸部にそれぞれ取り付けた発光素子及び受光素子と、
前記ハウジングの傾斜面に貼着けた反射板とからなるこ
とを特徴とするフォトインタラプタ。1. A housing made of an infrared-transmissive resin having a pair of projections facing each other at a predetermined interval at an upper end thereof, and having an inclined surface symmetrically provided on one side surface of the projections. Protrusions corresponding to the protruding portions are provided on both sides of the portion, and the SMT printed circuit board disposed in the housing and a light emitting device mounted on the protruded portion of the printed circuit board so as to face the inclined surface of the housing. An element and a light receiving element,
A photointerrupter, comprising: a reflector attached to an inclined surface of the housing.
外側に貼着してなる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 said reflection plate is attached to an outside of an inclined surface of said housing.
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。3. The photo-interrupter according to claim 1, wherein an infrared transmitting resin is used only in a portion of the housing that becomes a light path.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16263792A JP2800171B2 (en) | 1992-06-22 | 1992-06-22 | Photo-interrupter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16263792A JP2800171B2 (en) | 1992-06-22 | 1992-06-22 | Photo-interrupter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH065910A JPH065910A (en) | 1994-01-14 |
JP2800171B2 true JP2800171B2 (en) | 1998-09-21 |
Family
ID=15758407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16263792A Expired - Fee Related JP2800171B2 (en) | 1992-06-22 | 1992-06-22 | Photo-interrupter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2800171B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4492697B2 (en) | 2007-12-28 | 2010-06-30 | カシオ計算機株式会社 | Imaging apparatus and program |
JP5198190B2 (en) * | 2008-09-02 | 2013-05-15 | 株式会社タカデン | Photo-interrupter |
JP6296801B2 (en) | 2013-07-24 | 2018-03-20 | キヤノン株式会社 | IMAGING DEVICE, IMAGING DEVICE CONTROL METHOD, AND IMAGING DEVICE CONTROL PROGRAM |
-
1992
- 1992-06-22 JP JP16263792A patent/JP2800171B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH065910A (en) | 1994-01-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |