JPH0511527Y2 - - Google Patents
Info
- Publication number
- JPH0511527Y2 JPH0511527Y2 JP1985190757U JP19075785U JPH0511527Y2 JP H0511527 Y2 JPH0511527 Y2 JP H0511527Y2 JP 1985190757 U JP1985190757 U JP 1985190757U JP 19075785 U JP19075785 U JP 19075785U JP H0511527 Y2 JPH0511527 Y2 JP H0511527Y2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- light
- optical
- receiving
- 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
- 239000013307 optical fiber Substances 0.000 claims description 78
- 230000003287 optical effect Effects 0.000 claims description 40
- 238000005520 cutting process Methods 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Landscapes
- Light Guides In General And Applications Therefor (AREA)
Description
【考案の詳細な説明】
(a) 本考案の技術分野
この考案は、発光素子と受光素子との間の光路
を光フアイバによつて形成し、発光素子の光出力
を受光素子にもたらす構成の発光−受光回路にお
いて、光フアイバの各端を、発光素子のレンズ状
発光端および受光素子のレンズ状受光端にそれぞ
れ対面させて隙間なく固定連結するための光カプ
ラであつて、特に、光フアイバを切断する際、効
果的に作用する光フアイバ切断部を備えた光カプ
ラリンクホルダに関するものである。[Detailed description of the invention] (a) Technical field of the invention This invention is a structure in which an optical path between a light-emitting element and a light-receiving element is formed by an optical fiber, and the optical output of the light-emitting element is brought to the light-receiving element. An optical coupler for fixedly connecting each end of an optical fiber to a lenticular light-emitting end of a light-emitting element and a lenticular light-receiving end of a light-receiving element without any gaps in a light-emitting-light-receiving circuit. The present invention relates to an optical coupler link holder equipped with an optical fiber cutting section that works effectively when cutting the optical fiber.
(b) 従来の技術およびその問題点
周知のように、発光素子と受光素子とを組み合
せておき、発光素子からの光を光結合路を介して
受光素子で受光し、電気信号を光信号に変え、か
つ光信号を電気信号に変えて伝達させるようにし
た回路構成が多用されている。発光素子と受光素
子との間は光結合路により形成されるもので、発
光素子と受光素子が互いに遠隔の場所に配置され
ている場合には、光結合手段として光フアイバを
介在させる構成が知られている。この場合、光伝
達のロスをできるだけ少なくする目的において、
光フアイバの各端部をそれぞれ発光素子における
発光端ならびに受光素子における受光端に密着さ
せて確実に固定支持しておかなければならない。
しかも、発光素子と受光素子との間を光フアイバ
によつて光路接続する際、両者間の設置距離に応
じて光フアイバの長さを有効に設定して切断し、
かつその切断端面を当該光フアイバの軸方向に直
交するように形成しなければならないこと等の点
において、特別の治具を必要としていた。しかし
ながら、このような光カプラ装置の使用者は、光
フアイバの長さを種々変え、この光フアイバを多
様な用途に適用したい場合には上記治具を常備し
ておく必要があり、時間的、経済的な損失があつ
た。(b) Conventional technology and its problems As is well known, a light emitting element and a light receiving element are combined, the light from the light emitting element is received by the light receiving element via an optical coupling path, and an electrical signal is converted into an optical signal. A circuit configuration in which optical signals are converted into electrical signals and transmitted is often used. An optical coupling path is formed between the light-emitting element and the light-receiving element, and when the light-emitting element and the light-receiving element are located far from each other, a configuration in which an optical fiber is interposed as the optical coupling means is known. It is being In this case, for the purpose of minimizing loss in optical transmission,
Each end of the optical fiber must be firmly fixed and supported in close contact with the light-emitting end of the light-emitting element and the light-receiving end of the light-receiving element, respectively.
Moreover, when connecting the optical path between the light emitting element and the light receiving element using an optical fiber, the length of the optical fiber is effectively set and cut according to the installation distance between the two.
In addition, a special jig is required because the cut end surface must be formed perpendicular to the axial direction of the optical fiber. However, if the user of such an optical coupler device wants to change the length of the optical fiber and apply the optical fiber to various uses, it is necessary to keep the above-mentioned jig on hand, which requires time and effort. There was an economic loss.
(c) 本考案の技術的課題
そこで、この考案は、従来、光フアイバを光結
合路とする光電変換のための回路形成時に、特別
の治具を用いることなく、光フアイバを設定され
た長さに、かつ軸方向に垂直な端面として形成す
るようになした光フアイバ切断部を備えた光カプ
ラリンクホルダを提供することにある。(c) Technical issues of the present invention Therefore, the present invention aims to solve the problem of forming an optical fiber to a set length without using a special jig when forming a circuit for photoelectric conversion using an optical fiber as an optical coupling path. Another object of the present invention is to provide an optical coupler link holder having an optical fiber cutting portion formed as an end face perpendicular to the axial direction.
(d) 本考案の技術的手段
この考案は、上述する目的を達成するにあたつ
て、具体的には、発光素子のレンズ状発光端と、
受光素子のレンズ状受光端との間を、光フアイバ
を介在して光路接続するに際して、前記光フアイ
バの端面を前記発光素子の発光端あるいは受光素
子の受光端に密着させて固定支持するべく構成さ
れ、前記発光素子あるいは受光素子の頭部を収容
する素子収容室と、前記光フアイバを軸方向に収
容し、前記光フアイバの端面が前記素子収容室に
収容される素子の発光端あるいは受光端に達する
ように形成してある光フアイバ挿通孔を備えた光
カプラリンクホルダであつて、
前記光カプラリンクホルダのヘツド部分に、該
ヘツド部分の頂面側において開口し、前記光フア
イバ挿通孔に沿つてのび、前記光フアイバの外径
にほぼ等しい少なくとも一つの光フアイバ受入溝
と、前記ヘツド部分の頂面側において開口し、前
記光フアイバ受入溝に直交差していて、前記素子
収容室に収容される素子の発光端あるいは受光端
のレベル面に対して予め決められた面に沿つて形
成されるカツタガイドスリツトとを備えてなる光
フアイバ切断部を備えた光カプラリンクホルダを
構成する。(d) Technical Means of the Present Invention In order to achieve the above-mentioned object, the present invention specifically provides a lenticular light emitting end of a light emitting element;
When connecting an optical path between the lens-shaped light-receiving end of the light-receiving element and the light-receiving end of the light-receiving element through an optical fiber, the end face of the optical fiber is fixedly supported in close contact with the light-emitting end of the light-emitting element or the light-receiving end of the light-receiving element. an element accommodating chamber for accommodating the head of the light emitting element or the light receiving element; and an element accommodating chamber for axially accommodating the optical fiber, with an end face of the optical fiber being accommodated in the element accommodating chamber, and a light emitting end or a light receiving end of the element. An optical coupler link holder is provided with an optical fiber insertion hole formed to reach the optical fiber insertion hole, the optical coupler link holder having an opening in the head portion of the optical coupler link holder on the top surface side of the head portion, and an optical fiber insertion hole formed to reach the optical fiber insertion hole. at least one optical fiber receiving groove extending along the optical fiber and having a diameter substantially equal to the outer diameter of the optical fiber; and at least one optical fiber receiving groove opening on the top surface side of the head portion, perpendicularly intersecting the optical fiber receiving groove, and being accommodated in the element receiving chamber. An optical coupler link holder is provided with an optical fiber cutting section including a cutter guide slit formed along a plane predetermined with respect to a level plane of the light emitting end or the light receiving end of the device.
(e) 本考案の実施例
以下、この考案にかかる光フアイバ切断部を備
えた光カプラリンクホルダについて、図面に示す
具体的な実施例にもとづいて詳細に説明する。(e) Embodiments of the present invention Hereinafter, an optical coupler link holder equipped with an optical fiber cutting section according to the present invention will be described in detail based on specific embodiments shown in the drawings.
第１図は、この考案の一例に成る光フアイバ切
断部を備えた光カプラリンクホルダの概略的断面
図である。前記光カプラリンクホルダ１は、光を
伝達するための樹脂製光フアイバ２と、該光フア
イバ２の端部２ａを受け入れるホルダ本体３と、
前記ホルダ本体３に光フアイバ２を固定するため
のキヤツプナツト４とから成つている。この考案
に成る光カプラリンクホルダ１は、前記ホルダ本
体３の内部に発光ダイオード素子等の発光素子５
あるいはフオトトランジスタ等の受光素子６のい
ずれでも収容することができるようになつてい
る。すなわち、前記ホルダ本体３は、発光素子５
あるいは受光素子６の頭部を収容するに適した収
容室７を備えていて、互換可能な態様において構
成されている。前記ホルダ本体３およびキヤツプ
ナツト４は、不透明な樹脂財によつて成形加工さ
れたものが好ましい。前記ホルダ本体３は、発光
素子５におけるレンズ状に形成された発光端８の
向く方向に向けて外方に突出する突出部９を備え
ている。前記突出部９は、外周囲にネジ基部１
０、前記ネジ基部１０に連続する円錐面部分１
１、および前記突出部９の軸方向に沿つて複数の
スリツト１２を有している。前記突出部９の軸方
向に沿つて同心円的に光フアイバ挿通孔１３が穿
設されている。前記光フアイバ挿通孔１３は、前
記収容室７に達していて、前記光フアイバ１２
を、該光フアイバ挿通孔１３に挿着した際、前記
光フアイバ２の端部２ａを収容室７内に収容して
ある発光素子５の発光端８に当接させることがで
きるようになつている。一方、前記キヤツプナツ
ト４は、概して筒状のものであつて、一端内周部
に前記ホルダ３における突出部９の外周囲に設け
てあるネジ基部１０に螺合し合う雌ネジ部１４
と、前記雌ネジ部１４に連続して前記ホルダ本体
３における突出部９の外周囲に設けてある円錐面
部分１１に係合して合う内円錐面部１５と前記光
フアイバ２を軸方向に挿通する孔１６を備えてい
る。さらに詳述すると、前記キヤツプナツト４に
は、該キヤツプナツト４の締付時に、前記光フア
イバ２を軸方向に押し込む突起１７が設けてあ
り、前記ホルダ３における突出部９の頂端９ａ
に、前記突起１７に対応する面取り１８が設けて
ある。前記キヤツプナツト４の外周面１９は、ロ
ーレツト等のスベリ止めにより形成される。さら
に、この考案では、前記ホルダ本体３のヘツド部
分２０に、前記光フアイバの外径に等しい光フア
イバ受入溝２１と、前記受入溝２１に直交差する
カツタガイドスリツト２２とが設けてある。前記
光フアイバ受入溝２１は、図に示す具体例におい
て、前記ホルダ本体３に形成される光フアイバ挿
通孔１３に対して平行であるように二つ設けられ
ている。前記光フアイバ受入溝２１の溝底２３
は、光フアイバの横断面計状に合致する曲面によ
つて形成される。一方、前記カツタガイドスリツ
ト２２は、前記光フアイバ受入溝２１に直交差し
ていて、前記光フアイバ受入溝２１の溝底２３よ
り深い位置に終端２４を有している。前記カツタ
ガイドスリツト２２の溝幅は、一般的に使用され
るカツタ２５の刃２６が進入するに適した程度で
よく、約0.2〜0.5mm程度のものである。前記カツ
タガイドスリツト２２は、前記光カプラリンクホ
ルダ１内に収容される発光素子５におけるレンズ
状に形成された発光端８の端面レベル位置に合致
するように構成されている。 FIG. 1 is a schematic cross-sectional view of an optical coupler link holder equipped with an optical fiber cutting section, which is an example of this invention. The optical coupler link holder 1 includes a resin optical fiber 2 for transmitting light, a holder body 3 that receives an end 2a of the optical fiber 2,
and a cap nut 4 for fixing the optical fiber 2 to the holder body 3. The optical coupler link holder 1 according to this invention has a light emitting element 5 such as a light emitting diode element inside the holder main body 3.
Alternatively, any light receiving element 6 such as a phototransistor can be accommodated. That is, the holder main body 3 has a light emitting element 5
Alternatively, it is provided with a housing chamber 7 suitable for housing the head of the light-receiving element 6, and configured in an interchangeable manner. The holder main body 3 and cap nut 4 are preferably molded from an opaque resin material. The holder body 3 includes a protrusion 9 that protrudes outward in the direction toward which the lens-shaped light emitting end 8 of the light emitting element 5 faces. The protrusion 9 has a screw base 1 on its outer periphery.
0, conical surface portion 1 continuous to the screw base 10
1, and a plurality of slits 12 along the axial direction of the protrusion 9. An optical fiber insertion hole 13 is formed concentrically along the axial direction of the protrusion 9. The optical fiber insertion hole 13 reaches the accommodation chamber 7 and the optical fiber 12
When inserted into the optical fiber insertion hole 13, the end 2a of the optical fiber 2 can be brought into contact with the light emitting end 8 of the light emitting element 5 housed in the accommodation chamber 7. There is. On the other hand, the cap nut 4 has a generally cylindrical shape, and has a female threaded portion 14 at one end which is screwed into a threaded base 10 provided around the outer periphery of the protruding portion 9 of the holder 3.
Then, the optical fiber 2 is inserted in the axial direction through an inner conical surface portion 15 that is continuous with the female screw portion 14 and engages with a conical surface portion 11 provided around the outer periphery of the protruding portion 9 of the holder main body 3. The hole 16 is provided with a hole 16. More specifically, the cap nut 4 is provided with a protrusion 17 that pushes the optical fiber 2 in the axial direction when the cap nut 4 is tightened.
A chamfer 18 corresponding to the protrusion 17 is provided. The outer circumferential surface 19 of the cap nut 4 is formed with a non-slip material such as a knurl. Further, in this invention, the head portion 20 of the holder main body 3 is provided with an optical fiber receiving groove 21 having an outer diameter equal to the outer diameter of the optical fiber, and a cutter guide slit 22 that intersects perpendicularly with the receiving groove 21. In the specific example shown in the figure, two optical fiber receiving grooves 21 are provided so as to be parallel to the optical fiber insertion hole 13 formed in the holder main body 3. Groove bottom 23 of the optical fiber receiving groove 21
is formed by a curved surface that matches the cross-sectional shape of the optical fiber. On the other hand, the cutter guide slit 22 is perpendicular to the optical fiber receiving groove 21 and has a terminal end 24 at a position deeper than the groove bottom 23 of the optical fiber receiving groove 21. The groove width of the cutter guide slit 22 may be a width suitable for the blade 26 of a commonly used cutter 25 to enter, and is about 0.2 to 0.5 mm. The cutter guide slit 22 is configured to match the end surface level position of a lens-shaped light emitting end 8 of the light emitting element 5 housed in the optical coupler link holder 1.
以上の構成に成るこの考案の光カプラリンクホ
ルダは、一方のホルダ内に発光素子を収容し、他
方のホルダ内に受光素子を収容しておき、両ホル
ダ間を光フアイバを介して光路連結する。この
際、両ホルダ間の設置距離に応じて光フアイバの
長さを設定する。この作業は、光フアイバの一端
側を一方のホルダに連結し、他端側を他方のホル
ダのヘツド部分に設けた光フアイバ受入溝に位置
決めして、該光フアイバをカツタガイドスリツト
の部分で切断する。切断された光フアイバは、あ
らかじめ設定されているカツタガイドスリツトの
位置により、前記ホルダ内の発光素子の発光端に
整合されることができるとともに、光フアイバの
軸方向に直交した切断面をもたらすことができ
る。 The optical coupler link holder of this invention with the above structure houses a light emitting element in one holder, a light receiving element in the other holder, and connects the optical path between the two holders via an optical fiber. . At this time, the length of the optical fiber is set depending on the installation distance between both holders. This work involves connecting one end of the optical fiber to one holder, positioning the other end in the optical fiber receiving groove provided in the head of the other holder, and inserting the optical fiber into the cutter guide slit. disconnect. The cut optical fiber can be aligned with the light-emitting end of the light-emitting element in the holder by the preset position of the cutter guide slit, resulting in a cut plane perpendicular to the axial direction of the optical fiber. be able to.
(F) 本考案の効果
以上のように、この考案に成る光フアイバ切断
部を備えた光カプラリンクホルダは、発光素子と
受光素子との間の光路を光フアイバによつて形成
し、発光素子の光出力を受光素子にもたらす構成
の発光−受光回路を構成するに際して光フアイバ
を発光素子と受光素子の設置間隔に応じて、過不
足なくその有効長さに切断することができる。こ
の切断作業は、特別の治具を準備しておく必要が
なく、しかもきわめて容易に行うことができる。
切断された光フアイバの端面は、該光フアイバの
軸方向に直交する面として確実に形成され、発光
素子における発光端あるいは受光素子における受
光端に隙間なく接続することができる。(F) Effect of the present invention As described above, the optical coupler link holder with the optical fiber cutting part of this invention forms an optical path between a light emitting element and a light receiving element with an optical fiber, and when constructing a light emitting-light receiving circuit in which the optical output of the light emitting element is brought to the light receiving element, the optical fiber can be cut to its effective length just enough according to the installation distance between the light emitting element and the light receiving element. This cutting work does not require the preparation of a special jig, and can be done very easily.
The end face of the cut optical fiber is reliably formed as a surface perpendicular to the axial direction of the optical fiber, and can be connected without gaps to the light emitting end of the light emitting element or the light receiving end of the light receiving element.
さらに、この考案になる光フアイバ切断部を備
えた光カプラリンクホルダは、極めて簡単な構造
でなり、製造が容易で多量生産に適合する点にお
いて極めて有利であり、さらに、光フアイバを所
望の長さに切断処理した後、光フアイバを用いて
光路接続する場合に最も重要である光フアイバ切
断端面の切断状態を容易に確認することができ、
作業性の向上に有効に作用し、かつ光路接続部の
精度を高め得る点においても有効に作用するもの
といえる。 Furthermore, the optical coupler link holder with an optical fiber cutting section according to the present invention has an extremely simple structure, is easy to manufacture, and is extremely advantageous in that it is suitable for mass production. After cutting the optical fiber, you can easily check the state of the cut end of the optical fiber, which is most important when connecting optical paths using optical fibers.
It can be said that this method is effective in improving workability and also in improving the accuracy of the optical path connecting portion.
第１図は、この考案に成る光フアイバ切断部を
備えた光カプラリンクホルダの一例を示す概略的
側面図、第２図は、光フアイバの切断の態様を示
す斜視図、第３図は、一対の光カプラリンクホル
ダを光フアイバによつて光路連結した状態の斜視
図である。
１……光カプラリンクホルダ、２……光フアイ
バ、３……ホルダ本体、４……キヤツプナツト、
５……発光素子、６……受光素子、７……収容
室、２０……ホルダ本体のヘツド部分、２１……
光フアイバ受入溝、２２……カツタガイドスリツ
ト。
FIG. 1 is a schematic side view showing an example of an optical coupler link holder equipped with an optical fiber cutting section according to this invention, FIG. 2 is a perspective view showing a mode of cutting the optical fiber, and FIG. FIG. 3 is a perspective view of a pair of optical coupler link holders in which optical paths are connected by an optical fiber. 1... Optical coupler link holder, 2... Optical fiber, 3... Holder body, 4... Cap nut,
5... Light emitting element, 6... Light receiving element, 7... Storage chamber, 20... Head portion of holder main body, 21...
Optical fiber receiving groove, 22... cutter guide slit.
Claims (1)
ズ状受光端との間を、光フアイバを介在して光路
接続するに際して、前記光フアイバの端面を前記
発光素子の発光端あるいは受光素子の受光端に密
着させて固定支持するべく構成され、前記発光素
子あるいは受光素子の頭部を収容する素子収容室
と、前記光フアイバを軸方向に収容し、前記光フ
アイバの端面が前記素子収容室に収容される素子
の発光端あるいは受光端に達するように形成して
ある光フアイバ挿通孔を備えた光カプラリンクホ
ルダであつて、 前記光カプラリンクホルダのヘツド部分に、該
ヘツド部分の頂面側において開口し、前記光フア
イバ挿通孔に沿つてのび、前記光フアイバの外径
にほぼ等しい少なくとも一つの光フアイバ受入溝
と、前記ヘツド部分の頂面側において開口し、前
記光フアイバ受入溝に直交差していて、前記素子
収容室に収容される素子の発光端あるいは受光端
のレベル面に対して予め決められた面に沿つて形
成されるカツタガイドスリツトとを備えてなるこ
とを特徴とする光フアイバ切断部を備えた光カプ
ラリンクホルダ。[Claims for Utility Model Registration] When connecting an optical path between a lenticular light-emitting end of a light-emitting element and a lenticular light-receiving end of a light-receiving element through an optical fiber, the end face of the optical fiber is connected to the end face of the light-emitting element. an element accommodating chamber configured to be fixedly supported in close contact with the light emitting end or the light receiving end of the light receiving element and accommodating the head of the light emitting element or the light receiving element; and an element housing chamber accommodating the optical fiber in the axial direction; An optical coupler link holder comprising an optical fiber insertion hole formed such that an end surface reaches a light emitting end or a light receiving end of an element accommodated in the element housing chamber, the head portion of the optical coupler link holder having: at least one optical fiber receiving groove that is open on the top side of the head portion, extends along the optical fiber insertion hole, and is approximately equal to the outer diameter of the optical fiber; a cutter guide slit that is orthogonal to the optical fiber receiving groove and formed along a plane that is predetermined with respect to a level surface of a light emitting end or a light receiving end of the device accommodated in the device housing chamber; An optical coupler link holder equipped with an optical fiber cutting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985190757U JPH0511527Y2 (en) | 1985-12-10 | 1985-12-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985190757U JPH0511527Y2 (en) | 1985-12-10 | 1985-12-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6299010U JPS6299010U (en) | 1987-06-24 |
| JPH0511527Y2 true JPH0511527Y2 (en) | 1993-03-23 |
Family
ID=31144273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985190757U Expired - Lifetime JPH0511527Y2 (en) | 1985-12-10 | 1985-12-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0511527Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5840513A (en) * | 1981-06-22 | 1983-03-09 | ト−マス・アンド・ベツツ・コ−ポレ−シヨン | Apparatus for cutting and terminating optical fiber |
| JPS59119A (en) * | 1982-04-16 | 1984-01-05 | ト−マス アンド ベツツ コ−ポレ−シヨン | Fiber optical connector having freely operable fiber retaining means |
-
1985
- 1985-12-10 JP JP1985190757U patent/JPH0511527Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5840513A (en) * | 1981-06-22 | 1983-03-09 | ト−マス・アンド・ベツツ・コ−ポレ−シヨン | Apparatus for cutting and terminating optical fiber |
| JPS59119A (en) * | 1982-04-16 | 1984-01-05 | ト−マス アンド ベツツ コ−ポレ−シヨン | Fiber optical connector having freely operable fiber retaining means |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6299010U (en) | 1987-06-24 |
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