JPH0410702Y2 - - Google Patents

Description

【考案の詳細な説明】 産業上の利用分野 本考案は個別に形成された発光装置と受光装置
とを対向させて配置したフオトカプラに関連す
る。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a photocoupler in which a separately formed light emitting device and a light receiving device are placed facing each other.

従来の技術 個別に形成された発光装置と受光装置とを対向
させて構成したフオトカプラは公知である。この
種の従来のフオトカプラは、第９図に示すように
発光装置１と受光装置２が樹脂製ケース３に収納
される構成を有する。発光装置１及び受光装置２
には、リード電極４が設けられると共に、台座部
５とドーム状のレンズ部６とが一体に樹脂封止体
７で形成される。リード電極４の先端部には発光
素子８及び受光素子９が固着される。発光素子８
と受光素子９は、リード電極４の先端部と共に樹
脂封止体７で封止される。組立に際し、発光装置
１と受光装置２が樹脂製ケース３の下方の開口か
ら樹脂製ケース３内に挿入される。このとき、発
光装置１と受光装置２のドーム状レンズ部６が対
向するように配置される。次に、樹脂製板１０が
図中下方から挿入されて発光装置１と受光装置２
の位置決め及び光軸合わせが行われる。その後、
樹脂１１が注入されて封止が行われる。樹脂製ケ
ース３及び樹脂製板１０が遮光性の黒色樹脂で形
成され樹脂製ケース３と樹脂製板１０との隙間が
同じく黒色の樹脂１１で密封されるため、発光装
置１及び受光装置２は外光から遮断される。2. Description of the Related Art A photocoupler is known in which a light-emitting device and a light-receiving device, which are separately formed, are arranged facing each other. This type of conventional photocoupler has a structure in which a light emitting device 1 and a light receiving device 2 are housed in a resin case 3, as shown in FIG. Light emitting device 1 and light receiving device 2
A lead electrode 4 is provided therein, and a pedestal portion 5 and a dome-shaped lens portion 6 are integrally formed of a resin sealing body 7. A light emitting element 8 and a light receiving element 9 are fixed to the tip of the lead electrode 4. Light emitting element 8
The light receiving element 9 and the tip of the lead electrode 4 are sealed with a resin sealing body 7. During assembly, the light emitting device 1 and the light receiving device 2 are inserted into the resin case 3 from the lower opening of the resin case 3. At this time, the dome-shaped lens portions 6 of the light emitting device 1 and the light receiving device 2 are arranged to face each other. Next, the resin plate 10 is inserted from the bottom in the figure, and the light emitting device 1 and the light receiving device 2 are inserted.
positioning and optical axis alignment are performed. after that,
Resin 11 is injected and sealing is performed. Since the resin case 3 and the resin plate 10 are made of light-shielding black resin, and the gap between the resin case 3 and the resin plate 10 is sealed with the same black resin 11, the light emitting device 1 and the light receiving device 2 are It is shielded from outside light.

考案が解決しようとする問題点 この従来のフオトカプラは、発光装置１及び受
光装置２を樹脂製板１０により樹脂製ケース３の
内部の壁に押圧して固定する構造を有するので、
第９図に示す受光装置２のようにリード電極４の
曲げ角度が不充分な場合には、樹脂製板１０で押
圧しても発光装置１及び受光装置２を所望の位置
に固定することは困難であつた。即ち、発光装置
１と受光装置２の光軸を一致させかつドーム状レ
ンズ部６を所望の間隔で配置することが困難であ
り、フオトカプラの光結合効率の低下を招来し
た。このため、第１０図に示すようにスペーサ１
２を挿入して発光装置１及び受光装置２を位置決
めする試みも行われている。しかし、この構造で
は、新たな別部材としてスペーサ１２を必要とす
るため、構造が複雑化し組立工数が増加する欠点
があつた。Problems to be Solved by the Invention This conventional photocoupler has a structure in which the light emitting device 1 and the light receiving device 2 are pressed against the inner wall of the resin case 3 by the resin plate 10 and fixed.
If the bending angle of the lead electrode 4 is insufficient as in the light receiving device 2 shown in FIG. It was difficult. That is, it is difficult to align the optical axes of the light emitting device 1 and the light receiving device 2 and to arrange the dome-shaped lens portions 6 at desired intervals, resulting in a decrease in the optical coupling efficiency of the photocoupler. Therefore, as shown in FIG.
Attempts have also been made to position the light emitting device 1 and the light receiving device 2 by inserting the light emitting device 1 and the light receiving device 2. However, this structure requires the spacer 12 as a new separate member, which has the drawback of complicating the structure and increasing the number of assembly steps.

本考案は上記欠点を解消し、組立が容易で素子
の光軸一致及び位置決めを正確に行い得るフオト
カプラを提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks and to provide a photocoupler that is easy to assemble and allows accurate alignment and positioning of optical axes of elements.

問題点を解決するための手段 本考案によるフオトカプラは、一方に開放面を
有する遮光性ケースと、遮光性ケース内に配置さ
れ且つ個別に形成された発光装置および受光装置
と、遮光性ケースの開放面を閉鎖する樹脂製板と
を有し、発光装置と受光装置の各々が、樹脂封止
体と、樹脂封止体から導出されたリード電極とを
備えている。樹脂封止体の各々は、台座部と、台
座部から延びるレンズ部と、台座部からレンズ部
より突出して且つレンズ部の外側に形成された側
壁部とを有する。発光装置と受光装置は、それら
のレンズ部が互いに一定間隔離間して対向するよ
うに側壁部が互いに当接し且つ側壁部が開放面に
対向するように遮光性ケース内に収容されてい
る。発光装置と受光装置のリード電極は発光装置
と受光装置の樹脂封止体に当接して配置された樹
脂製板の開孔を通つて遮光性ケースの外部に導出
されている。Means for Solving the Problems The photocoupler according to the present invention includes a light-shielding case having an open surface on one side, a light-emitting device and a light-receiving device arranged inside the light-shielding case and formed individually, and an opening of the light-shielding case. The light emitting device and the light receiving device each include a resin sealing body and a lead electrode led out from the resin sealing body. Each of the resin sealing bodies includes a pedestal, a lens part extending from the pedestal, and a side wall projecting from the pedestal and formed on the outside of the lens part. The light-emitting device and the light-receiving device are housed in a light-shielding case such that their lens portions face each other at a certain distance, their side walls abut each other, and their side walls face the open surface. Lead electrodes of the light-emitting device and the light-receiving device are led out of the light-shielding case through holes in a resin plate placed in contact with the resin-sealed bodies of the light-emitting device and the light-receiving device.

作 用 発光装置及び受光装置の少なくとも一方に形成
された側壁部は、相対する前記発光装置又は受光
装置の他方の一部に当接し、対向する発光装置及
び受光装置の位置を互いに正確に位置決めする。
このため、特別な部材を使用せず、発光装置と受
光装置の光軸が正確に一致しかつ所望のレンズ部
間隔が得られる。Function: The side wall portion formed on at least one of the light emitting device and the light receiving device contacts the other part of the opposing light emitting device and the light receiving device, and accurately positions the opposing light emitting device and light receiving device relative to each other. .
Therefore, the optical axes of the light emitting device and the light receiving device can be accurately aligned and a desired distance between the lens parts can be obtained without using any special members.

実施例 以下本考案の好適な実施例を第１図〜第７図に
よつて説明する。Embodiment A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

第１図は、本考案の実施例のフオトカプラを示
し、ａはリード電極に沿う側断面図、ｂは横断面
図である。第１図において、樹脂製ケース１３内
に発光装置１４と受光装置１５とが対向して配置
され、樹脂製板１６と樹脂１７で封止されてい
る。発光装置１４のリード電極１８は樹脂製板１
６に設けられた開孔１９を貫通して外方に導出さ
れ、受光装置１５のリード電極２０は樹脂製板１
６に設けられた開孔２１を貫通して外方に導出さ
れる。発光装置１４には、光軸方向に突出して形
成されたドーム状レンズ部２２、これと一体に樹
脂成形された側壁部２３，２４及び台座部２５が
設けられる。レンズ部２２と側壁部２３，２４と
の間には切欠き部が形成される。同様に受光装置
１５にも光軸方向に突出して形成されたドーム状
レンズ部２６、これと一体に樹脂成形された側壁
部２７，２８及び台座部２９が設けられる。レン
ズ部２６と側壁部２７，２８との間には切欠き部
が形成される。リード電極１８，２０の先端には
それぞれ半導体チツプ３０，３１が固着される。 FIG. 1 shows a photocoupler according to an embodiment of the present invention, in which a is a side cross-sectional view taken along a lead electrode, and b is a cross-sectional view. In FIG. 1, a light emitting device 14 and a light receiving device 15 are arranged facing each other in a resin case 13, and are sealed with a resin plate 16 and a resin 17. The lead electrode 18 of the light emitting device 14 is made of a resin plate 1
The lead electrode 20 of the light receiving device 15 penetrates the opening 19 provided in the resin plate 1 and is led out.
It passes through an opening 21 provided in 6 and is led out. The light emitting device 14 is provided with a dome-shaped lens portion 22 formed to protrude in the optical axis direction, side wall portions 23 and 24 integrally molded with resin, and a pedestal portion 25. A notch portion is formed between the lens portion 22 and the side wall portions 23 and 24. Similarly, the light receiving device 15 is also provided with a dome-shaped lens portion 26 formed to protrude in the optical axis direction, side walls 27 and 28 and a pedestal portion 29 integrally molded with resin. A cutout portion is formed between the lens portion 26 and the side wall portions 27 and 28. Semiconductor chips 30 and 31 are fixed to the tips of lead electrodes 18 and 20, respectively.

第２図ａは、発光装置１４の正面図である。図
示のように、発光装置１４は、上方の側壁部２３
と下方の側壁部２４がドーム状レンズ部２２を挟
んで対向して設けられると共に、リード電極１８
の一端側が台座部２５を形成する樹脂中に埋設さ
れる。第２図ｂは、発光装置１４の側面図であ
る。同図において３２は上方の側壁部２３に設け
られた凹部であり、３３は下方の側壁部２４に設
けられた凸部を示す。ドーム状レンズ部２２の両
側面の一部は垂直方向に切り欠かれ、この切り欠
かれた部分は台座部２５の側面と略同一平面をな
している。第２図ｃは、発光装置１４の平面図で
ある。ドーム状レンズ部２２の頂部の位置は、側
壁部２３，２４の先端位置よりも少し下がつてい
る。リード電極１８に接続される半導体チツプ３
０としては、赤外発光ダイオードを構成する
GaAsチツプが通常使用される。また、側壁部２
３，２４、ドーム状レンズ部２２及び台座部２５
は、周知のトランスフアーモールド法又はポツテ
イング法により一体成形される。尚、受光装置１
５に用いる半導体チツプ３１は、フオトトランジ
スタを構成するSiチツプである。受光装置１５の
形状は発光装置１４と略同一のため、説明を省
く。 FIG. 2a is a front view of the light emitting device 14. As illustrated, the light emitting device 14 includes an upper side wall portion 23
and a lower side wall portion 24 are provided facing each other with the dome-shaped lens portion 22 in between, and the lead electrode 18
One end side is embedded in the resin forming the pedestal portion 25. FIG. 2b is a side view of the light emitting device 14. In the figure, 32 is a recess provided in the upper side wall portion 23, and 33 is a convex portion provided in the lower side wall portion 24. Parts of both side surfaces of the dome-shaped lens portion 22 are cut out in the vertical direction, and these cut portions are substantially flush with the side surfaces of the pedestal portion 25 . FIG. 2c is a plan view of the light emitting device 14. The position of the top of the dome-shaped lens portion 22 is slightly lower than the tip positions of the side wall portions 23 and 24. Semiconductor chip 3 connected to lead electrode 18
0 constitutes an infrared light emitting diode
GaAs chips are commonly used. In addition, the side wall portion 2
3, 24, dome-shaped lens part 22 and pedestal part 25
are integrally molded by the well-known transfer molding method or potting method. In addition, the light receiving device 1
The semiconductor chip 31 used in 5 is a Si chip constituting a phototransistor. The shape of the light receiving device 15 is substantially the same as that of the light emitting device 14, so a description thereof will be omitted.

第３図ａ，ｂは、対向して配置した発光装置１
４と受光装置１５から成る組立体３４の正面図及
び平面図である。発光装置１４の側壁部２３，２
４に形成された凹部３２、凸部３３と受光装置１
５の側壁部２７，２８に形成された凸部３５、凹
部３６とがそれぞれ嵌合し、かつ側壁部２３，２
７の先端同志及び側壁部２４，２８の先端同志が
接着剤（図示せず）により固着されている。この
結果、組立体３４は、所望の間隔でドーム状レン
ズ部２２，２６が対向し、かつ発光装置１４と受
光装置１５の光軸が一致して配置されている。
尚、側壁部２３，２７と側壁部２４，２８は光軸
に沿つて連続して延在し、互いにドーム状レンズ
部２２，２６を挟んで対向している。また、発光
装置１４及び受光装置１５を収納する樹脂製ケー
ス１３の形状に適合するように、組立に先立つて
発光装置１４及び受光装置１５のリード電極１
８，２０は折曲げられる。組立に際しては、第１
図に示す樹脂製ケース１３内に組立体３４を収納
した後、開孔１９，２１を貫通してリード電極１
８，２０を外部に導出させながら樹脂製板１６で
蓋をし、その後で樹脂１７を注入して封止する。
尚、組立体３４の上面部３７は樹脂製ケース１３
の底面１３ａに当接し、組立体３４の下面部３８
は樹脂製板１６の上面１６ａに当接する。また、
組立体３４の両側面３９，４０は樹脂製ケース１
３の内側面１３ｂに略当接する。 FIGS. 3a and 3b show light-emitting devices 1 disposed facing each other.
4 and a front view and a plan view of an assembly 34 consisting of a light receiving device 15. Side wall portions 23, 2 of light emitting device 14
4 and the concave portion 32 and convex portion 33 formed in the light receiving device 1
The convex portion 35 and the concave portion 36 formed on the side wall portions 27 and 28 of No. 5 fit together, respectively, and the side wall portions 23 and 2
7 and the ends of the side wall portions 24 and 28 are fixed together with an adhesive (not shown). As a result, in the assembly 34, the dome-shaped lens portions 22 and 26 face each other at a desired interval, and the optical axes of the light emitting device 14 and the light receiving device 15 are aligned.
Note that the side wall portions 23, 27 and the side wall portions 24, 28 extend continuously along the optical axis, and face each other with the dome-shaped lens portions 22, 26 in between. In addition, the lead electrodes 1 of the light emitting device 14 and the light receiving device 15 are prepared before assembly so as to fit the shape of the resin case 13 that houses the light emitting device 14 and the light receiving device 15.
8 and 20 are bent. When assembling, the first
After housing the assembly 34 in the resin case 13 shown in the figure, the lead electrode 1 is inserted through the openings 19 and 21.
8 and 20 are led out to the outside and covered with a resin plate 16, and then resin 17 is injected for sealing.
Note that the upper surface 37 of the assembly 34 is connected to the resin case 13.
The bottom surface 38 of the assembly 34 is in contact with the bottom surface 13a of the assembly 34.
comes into contact with the upper surface 16a of the resin plate 16. Also,
Both sides 39 and 40 of the assembly 34 are made of resin case 1.
substantially abuts on the inner surface 13b of No. 3.

要するに、発光装置１４及び受光装置１５の
各々に設けられたレンズ部２２，２６はそれぞれ
台座部２５，２９から延びており、発光装置１４
及び受光装置１５の各々に設けられたレンズ部２
２，２６を挟む平行な二つの平面を想定したと
き、側壁部２３，２４及び２７，２８と台座部２
５，２９のそれぞれの一方及び他方の側面がそれ
ぞれ前記平行な二つの平面に略一致する。これら
の二つの平面は発光装置１４及び受光装置１５に
設けられたレンズ部２２，２６に略外接する。 In short, the lens parts 22 and 26 provided in each of the light emitting device 14 and the light receiving device 15 extend from the pedestal parts 25 and 29, respectively, and the light emitting device 14
and a lens section 2 provided in each of the light receiving devices 15.
When assuming two parallel planes sandwiching 2 and 26, the side walls 23, 24 and 27, 28 and the pedestal 2
One side and the other side of each of 5 and 29 substantially coincide with the two parallel planes. These two planes substantially circumscribe the lens portions 22 and 26 provided in the light emitting device 14 and the light receiving device 15.

第１図に示す実施例のフオトカプラは、次の効
果を有する。 The photocoupler of the embodiment shown in FIG. 1 has the following effects.

側壁部２３と２７及び側壁部２４と２８の固着
により発光装置１４と受光装置１５が結合され
る。従つて、所定のレンズ部間隔が保たれ、かつ
光軸が正確に一致するので、光結合特性が良好で
ある。 The light emitting device 14 and the light receiving device 15 are coupled by fixing the side walls 23 and 27 and the side walls 24 and 28. Therefore, a predetermined distance between the lens parts is maintained and the optical axes are accurately aligned, resulting in good optical coupling characteristics.

ドーム状レンズ部２２，２６の両側面の一部が
垂直方向に切り欠かれるので、組立体３４及びフ
オトカプラが薄形化され、フオトカプラの実装密
度を向上することができる。尚、ドーム状レンズ
部２２，２６を切り欠かない場合も含めて、ドー
ム状レンズ部２２，２６の最大幅から突出しない
ように側壁部２３，２４，２７，２８及び台座部
２５，２９を形成することにより、フオトカプラ
の薄形化が達成できる。 Since parts of both side surfaces of the dome-shaped lens parts 22 and 26 are cut out in the vertical direction, the assembly 34 and the photocoupler can be made thinner, and the mounting density of the photocoupler can be improved. In addition, including the case where the dome-shaped lens parts 22, 26 are not cut out, the side wall parts 23, 24, 27, 28 and the pedestal parts 25, 29 are formed so as not to protrude from the maximum width of the dome-shaped lens parts 22, 26. By doing so, the photocoupler can be made thinner.

側壁部２３，２４，２７，２８が発光装置１４
及び受光装置１５と一体に成形されるので、組立
に際しスペーサ等の別部材を必要としない。しか
も、凹部３２，３６と凸部３３，３５との嵌合に
より組立体３４の製作が容易である。このため、
組立作業が簡易で生産効率の良いフオトカプラが
得られる。 The side wall portions 23, 24, 27, and 28 are the light emitting device 14.
Since it is molded integrally with the light receiving device 15, separate members such as spacers are not required during assembly. Moreover, the assembly 34 can be easily manufactured by fitting the concave portions 32, 36 and the convex portions 33, 35. For this reason,
A photocoupler that is easy to assemble and has high production efficiency can be obtained.

従来では、樹脂製板１６の外側から樹脂１７を
注入した時にドーム状レンズ部２２，２６の対面
空間内に樹脂１７が流入する欠点があつたが、側
壁部２４，２８は、樹脂製ケース１３の内側面１
３ｂに略当接して、ドーム状レンズ部２２，２６
の対面空間への樹脂１７の流入を確実に防止す
る。 Conventionally, when the resin 17 was injected from the outside of the resin plate 16, the resin 17 flowed into the facing space of the dome-shaped lens parts 22 and 26. inner surface 1
3b, the dome-shaped lens portions 22, 26
To reliably prevent the resin 17 from flowing into the facing space.

側壁部２３，２４，２７，２８が光軸に沿つて
ドーム状レンズ部２２，２６の側方に延在するの
で、発光装置１４及び受光装置１５を透明の樹脂
で成形しても側壁部２３，２４，２７，２８上で
行われる光反射作用により、優れた光結合特性の
フオトカプラが得られる。 Since the side wall portions 23, 24, 27, and 28 extend along the optical axis to the sides of the dome-shaped lens portions 22 and 26, even if the light emitting device 14 and the light receiving device 15 are molded from transparent resin, the side wall portion 23 , 24, 27, and 28, a photocoupler with excellent optical coupling characteristics can be obtained.

発光装置１４と受光装置１５とは、全く同一の
外形で樹脂成形され、リード電極１８，２０の折
曲げ方向を反対として、凹部３２，３６と凸部３
３，３５とを対応させている。従つて、樹脂成形
型を発光装置１４と受光装置１５で共用できる。 The light-emitting device 14 and the light-receiving device 15 are resin-molded to have exactly the same external shape, and the lead electrodes 18 and 20 are bent in opposite directions so that the concave portions 32 and 36 and the convex portion 3 are formed.
3 and 35 are made to correspond. Therefore, the resin mold can be shared by the light emitting device 14 and the light receiving device 15.

第４図及び第５図は本考案によるフオトカプラ
の他の実施例を示す。これらの図面では第１図〜
第３図と同様の箇所には同一符号を付して、その
説明を省略する。第４図ａ，ｂは発光装置１４の
正面図及び側面図である。図示のように、側壁部
４１は略同心円状に多少の間隔を置いてドーム状
レンズ部２２を包囲する。受光装置１５にも、同
じくドーム状レンズ部２６を包囲する側壁部４２
を形成する。発光装置１４と受光装置１５は、第
３図の場合と同様に、凹部３２，３６と凸部３
３，３５を嵌合させて接着剤（図示せず）で一体
化され、円筒形の組立体３４が作成される。第５
図は、組立体３４の外周に樹脂層４３を形成して
完成したフオトカプラの正面図である。樹脂層４
３は黒色エポキシ樹脂等の遮光性樹脂の粉体塗装
により形成されるのが適当であが、組立体３４の
遮光手段としては種々のものを利用できる。 4 and 5 show other embodiments of the photocoupler according to the present invention. In these drawings, Figure 1~
Components similar to those in FIG. 3 are designated by the same reference numerals, and their explanations will be omitted. 4a and 4b are a front view and a side view of the light emitting device 14. FIG. As shown in the figure, the side wall portion 41 surrounds the dome-shaped lens portion 22 approximately concentrically with some spacing therebetween. The light receiving device 15 also includes a side wall portion 42 surrounding the dome-shaped lens portion 26.
form. As in the case of FIG.
3 and 35 are fitted together and integrated with an adhesive (not shown) to create a cylindrical assembly 34. Fifth
The figure is a front view of a photocoupler completed by forming a resin layer 43 on the outer periphery of the assembly 34. Resin layer 4
3 is suitably formed by powder coating of a light-shielding resin such as black epoxy resin, but various types of light-shielding means can be used as the light-shielding means for the assembly 34.

第５図に示すフオトカプラは、第１図に示すフ
オトカプラの効果を有すると共に、ドーム状レン
ズ部２２，２６が外部に露出しないので粉体塗装
等の手段により樹脂製ケースを使用せず遮光が可
能であり、安価に製作できる。更に、ドーム状レ
ンズ部２２，２６が側壁部４１，４２により完全
に包囲されるので、素子の光指向性に優れ、光結
合特性も良好なものとなる。尚、側壁部４１，４
２にてドーム状レンズ部２２，２６を完全に包囲
しない構成とすることも可能であるが、この場合
は適当な樹脂製ケースで周囲を遮光する必要があ
る。 The photocoupler shown in Fig. 5 has the effect of the photocoupler shown in Fig. 1, and since the dome-shaped lens parts 22 and 26 are not exposed to the outside, light can be blocked by means such as powder coating without using a resin case. and can be manufactured at low cost. Furthermore, since the dome-shaped lens parts 22 and 26 are completely surrounded by the side walls 41 and 42, the element has excellent light directivity and good optical coupling characteristics. In addition, the side wall portions 41, 4
2, it is also possible to adopt a configuration in which the dome-shaped lens portions 22 and 26 are not completely surrounded, but in this case, it is necessary to shield the surrounding area from light with a suitable resin case.

次に第６図〜第８図により本考案の変形例を説
明する。第６図と第７図は組立体３４の状態を示
し、第１図〜第５図のいずれの実施例にも応用可
能な変形例である。第８図はフオトカプラの状態
を図示し第１図〜第５図の実施例に応用可能な変
形例である。 Next, a modification of the present invention will be explained with reference to FIGS. 6 to 8. 6 and 7 show the state of the assembly 34, which is a modification that can be applied to any of the embodiments shown in FIGS. 1-5. FIG. 8 illustrates the state of the photocoupler and is a modification that can be applied to the embodiments of FIGS. 1 to 5.

第６図は、側壁部４３，４４を有する発光装置
１４と、側壁部を持たない受光装置１５との組合
せによりフオトカプラを構成した例を示す。側壁
部４３，４４の先端部には図示せぬ凹凸部が形成
され、受光装置１５の台座部２９に形成された図
示せぬ凹凸部と嵌合している。 FIG. 6 shows an example in which a photocoupler is configured by a combination of a light emitting device 14 having side walls 43 and 44 and a light receiving device 15 having no side walls. Unillustrated uneven portions are formed at the tips of the side wall portions 43 and 44, and are fitted with unillustrated uneven portions formed on the pedestal portion 29 of the light receiving device 15.

第７図は、一方側に側壁部４５を有する発光装
置１４と他方側に側壁部４６を有する受光装置１
５によりフオトカプラを構成した例を示す。 FIG. 7 shows a light emitting device 14 having a side wall portion 45 on one side and a light receiving device 1 having a side wall portion 46 on the other side.
An example in which a photocoupler is configured using 5 is shown below.

第８図は、樹脂製板１６を用いずに発光装置１
４と受光装置１５との組立体３４を樹脂製ケース
１３に収納して成る例を示す。樹脂製ケース１３
の開口部に近い側壁部４８，５０の厚みを反対側
の側壁部４７，４９より増加させているので、ド
ーム状レンズ部２２，２６の対面する空間内への
樹脂１７の流入を更に効果的に防止できる。本考
案に係るフオトカプラでは、発光装置と受光装置
とを互いに接着せずに、樹脂製ケース内で単に組
合せて固定することも可能である。 FIG. 8 shows the light emitting device 1 without using the resin plate 16.
4 and a light receiving device 15 are housed in a resin case 13. Resin case 13
Since the thickness of the side wall portions 48, 50 near the opening of the lens is made larger than that of the side wall portions 47, 49 on the opposite side, the inflow of the resin 17 into the space where the dome-shaped lens portions 22, 26 face each other is made more effective. can be prevented. In the photocoupler according to the present invention, it is also possible to simply combine and fix the light emitting device and the light receiving device within the resin case without adhering them to each other.

尚、本考案に係るフオトカプラは、ドーム状レ
ンズ部２２，２６、側壁部２３，２４，２７，２
８等及び台座部２５，２９を透明のエポキシ樹脂
で成形し、また、樹脂製ケース１３と樹脂製板１
６を遮光性に優れた黒色のポリカーボネート樹脂
で成形するのが望ましい。ケース内に注入する樹
脂１７としては黒色のエポキシ樹脂が望ましい。
更に、リード電極１８，２０は鉄を芯材とし、銅
−ニツケル−銀の順にメツキしたものが好適に用
いられる。また、側壁部を白色樹脂にて形成する
ことも可能である。この場合、ドーム状レンズ部
と側壁部との成形を２段階に行う必要が生じる
が、光結合効率を増大させることが可能となる。 The photocoupler according to the present invention includes dome-shaped lens portions 22, 26, side wall portions 23, 24, 27, 2.
8 etc. and the pedestals 25 and 29 are molded with transparent epoxy resin, and the resin case 13 and the resin plate 1 are molded with transparent epoxy resin.
6 is desirably molded from a black polycarbonate resin with excellent light-shielding properties. The resin 17 injected into the case is preferably black epoxy resin.
Furthermore, the lead electrodes 18 and 20 are preferably made of iron as a core material and plated with copper, nickel, and silver in this order. Moreover, it is also possible to form the side wall part with white resin. In this case, although it is necessary to mold the dome-shaped lens portion and the side wall portion in two steps, it is possible to increase the optical coupling efficiency.

更に、ドーム状レンズ部を透明の樹脂で形成
し、優れた遮光性樹脂で側壁部及び台座部の全体
又は外周部を形成してもよい。この場合、第５図
のフオトカプラに適用したとき、組立体３４の遮
光手段が容易となる利点を有する。また、側壁部
よりも高い光反射率を有する部材を側壁部の内面
に当接させたり、塗装等により高光反射率の層を
側壁部の内面に形成してもよい。この場合、更に
優れた光結合効率のフオトカプラを提供できる。 Furthermore, the dome-shaped lens portion may be formed of a transparent resin, and the entire side wall portion and the pedestal portion or the outer peripheral portion may be formed of an excellent light-shielding resin. In this case, when applied to the photocoupler of FIG. 5, there is an advantage that the light shielding means of the assembly 34 can be easily provided. Further, a member having a higher light reflectance than the side wall portion may be brought into contact with the inner surface of the side wall portion, or a layer having a high light reflectance may be formed on the inner surface of the side wall portion by painting or the like. In this case, a photocoupler with even better optical coupling efficiency can be provided.

考案の効果 以上のように本考案は、発光装置と受光装置の
光軸合わせ及び位置決めを正確に行うことができ
ると共に組立の容易なフオトカプラを提供でき
る。Effects of the Invention As described above, the present invention can provide a photocoupler that can accurately align and position the optical axis of a light emitting device and a light receiving device, and is easy to assemble.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は、本考案の実施例のフオトカプラを示
し、ａはリード電極に沿う断面図、ｂは横断面
図、第２図ａは発光装置の正面図、ｂは発光装置
の側面図、ｃは発光装置の平面図、第３図ａは発
光装置と受光装置とから成る組立体の正面図、ｂ
は平面図、第４図ａは本考案の他の実施例で使用
する発光装置の正面図、ｂは側面図、第５図は第
４図の発光装置を使用して組立たフオトカプラの
正面図、第６図、第７図及び第８図は本考案のそ
れぞれ別の実施例を示す断面図、第９図及び第１
０図は異なる従来のフオトカプラの断面図を示
す。 １４……発光装置、１５……受光装置、２２，
２６……レンズ部、２３，２４，２７，２８……
側壁部、３２，３６……凹部、３３，３５……凸
部。 FIG. 1 shows a photocoupler according to an embodiment of the present invention, in which a is a cross-sectional view taken along the lead electrode, b is a cross-sectional view, FIG. 2 a is a front view of the light-emitting device, b is a side view of the light-emitting device, and c 3 is a plan view of a light emitting device, FIG. 3a is a front view of an assembly consisting of a light emitting device and a light receiving device, and b
4 is a plan view, FIG. 4 a is a front view of a light emitting device used in another embodiment of the present invention, b is a side view, and FIG. 5 is a front view of a photocoupler assembled using the light emitting device of FIG. 4. , FIG. 6, FIG. 7, and FIG. 8 are sectional views showing different embodiments of the present invention, and FIG. 9 and FIG.
Figure 0 shows a cross-sectional view of a different conventional photocoupler. 14... Light emitting device, 15... Light receiving device, 22,
26... Lens section, 23, 24, 27, 28...
Side wall portion, 32, 36... recess, 33, 35... protrusion.

Claims (1)

【実用新案登録請求の範囲】 (1) 一方に開放面を有する遮光性ケースと、該遮
光性ケース内に配置され且つ個別に形成された
発光装置および受光装置と、前記遮光性ケース
の開放面を閉鎖する樹脂製板とを有し、前記発
光装置と受光装置の各々が、樹脂封止体と、該
樹脂封止体から導出されたリード電極とを備え
たフオトカプラにおいて、 前記樹脂封止体の各々は、台座部と、該台座
部から延びるレンズ部と、前記台座部から前記
レンズ部より突出して且つ前記レンズ部の外側
に形成された側壁部とを有し、 前記発光装置と前記受光装置は、それらの前
記レンズ部が互いに一定間隔離間して対向する
ように前記側壁部が互いに当接し且つ前記側壁
部が前記開放面に対向するように前記遮光性ケ
ース内に収容され、 前記発光装置と受光装置の前記リード電極は
前記発光装置と前記受光装置の前記樹脂封止体
に当接して配置された前記樹脂製板の開孔を通
つて前記遮光性ケースの外部に導出されている
ことを特徴とするフオトカプラ。 (2) 前記発光装置と受光装置の前記レンズ部と前
記側壁部との間には切欠き部が形成された実用
新案登録請求の範囲第(1)項に記載のフオトカプ
ラ。[Claims for Utility Model Registration] (1) A light-shielding case having an open surface on one side, a light-emitting device and a light-receiving device disposed within the light-shielding case and formed individually, and an open surface of the light-shielding case. and a resin plate for closing the photocoupler, and each of the light emitting device and the light receiving device includes a resin sealing body and a lead electrode led out from the resin sealing body, wherein the resin sealing body each has a pedestal part, a lens part extending from the pedestal part, and a side wall part projecting from the pedestal part from the lens part and formed on the outside of the lens part, the light emitting device and the light receiving device The device is housed in the light-shielding case so that the side wall portions are in contact with each other so that the lens portions face each other with a certain distance from each other, and the side wall portions face the open surface, and the light emitting The lead electrodes of the device and the light-receiving device are led out to the outside of the light-shielding case through holes in the resin plate that are arranged in contact with the resin sealing bodies of the light-emitting device and the light-receiving device. A photocoupler characterized by: (2) The photocoupler according to claim 1, wherein a notch is formed between the lens portion and the side wall portion of the light emitting device and the light receiving device.