JPH0614380Y2 - Shield structure of photo detector - Google Patents
Shield structure of photo detectorInfo
- Publication number
- JPH0614380Y2 JPH0614380Y2 JP1987063144U JP6314487U JPH0614380Y2 JP H0614380 Y2 JPH0614380 Y2 JP H0614380Y2 JP 1987063144 U JP1987063144 U JP 1987063144U JP 6314487 U JP6314487 U JP 6314487U JP H0614380 Y2 JPH0614380 Y2 JP H0614380Y2
- Authority
- JP
- Japan
- Prior art keywords
- shield member
- electromagnetic shield
- light receiving
- receiving element
- optical fiber
- 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
- Switches Operated By Changes In Physical Conditions (AREA)
- Electronic Switches (AREA)
- Optical Communication System (AREA)
Description
この考案は、光ファイバ式光電スイッチ等に用いられる
受光装置におけるシールド構造に関する。The present invention relates to a shield structure in a light receiving device used for an optical fiber type photoelectric switch or the like.
この種のシールド構造として、実開昭６１−１６８３４
号公報に記載のものがある。これは、光電変換素子の周
側面をシールド板で包囲し、このシールド板の前面と光
ファイバの先端との間に平板状の透明な電磁シールド部
材を介挿したものである。As a shield structure of this type, the actual construction is 61-16834.
There is one described in the publication. In this, the peripheral side surface of the photoelectric conversion element is surrounded by a shield plate, and a flat plate-shaped transparent electromagnetic shield member is interposed between the front surface of the shield plate and the tip of the optical fiber.
ところが、上記公報の記載にもみられるように、受光素
子の前面に光ファイバが挿入される受光装置において
は、光ファイバ挿入時の押圧力により、電磁シールド部
材がこれに対向するシールド板に突き当たって擦られ、
導電被膜が剥離してシールド機能を損なうという問題が
あった。 この考案は、光ファイバを電磁シールド部材に繰り返し
密着させても電磁シールド部材の導電被膜が擦られるこ
とがなく、したがって導電被膜の損傷が生じない受光装
置のシールド構造を提供することを目的とするものであ
る。However, as seen in the description of the above publication, in the light receiving device in which the optical fiber is inserted in the front surface of the light receiving element, the pressing force at the time of inserting the optical fiber causes the electromagnetic shield member to hit the shield plate facing the electromagnetic shield member. Rubbed,
There is a problem that the conductive film peels off and the shield function is impaired. An object of the present invention is to provide a shield structure for a light receiving device in which the conductive coating of the electromagnetic shield member is not rubbed even if the optical fiber is repeatedly brought into close contact with the electromagnetic shield member, and therefore the conductive coating is not damaged. It is a thing.
この考案は、受光素子の前方に透明な電磁シールド部材
を配置した受光装置のシールド構造において、受光素子
の外側に導電ゴムの筒体を被嵌し、この筒体に電磁シー
ルド部材を保持させるものとする。This invention is a shield structure of a light-receiving device in which a transparent electromagnetic shield member is arranged in front of a light-receiving element, and a conductive rubber tube body is fitted on the outer side of the light-receiving element to hold the electromagnetic shield member in the tube body. And
この考案によれば、電磁シールド部材は可撓性のあるゴ
ム質の筒体に接しているので、光ファイバから電磁シー
ルド部材に押圧力が加わっても、導電ゴムの伸縮により
電磁シールド部材と筒体との接触面の擦れが大幅に軽減
される。According to the present invention, since the electromagnetic shield member is in contact with the flexible rubber cylinder, even if a pressing force is applied to the electromagnetic shield member from the optical fiber, the conductive rubber expands and contracts to prevent the electromagnetic shield member and the cylinder from being compressed. Rubbing of the contact surface with the body is greatly reduced.
第１図は、光ファイバ式光電スイッチにおけるこの考案
の実施例を示すものである。 図において、１は受光素子で、本体２の上面にホトダイ
オードあるいはホトトランジスタのチップ３が搭載さ
れ、さらにその上に透明カバー４が取り付けられてい
る。また本体２の周縁には金属被膜が形成され、さらに
底部にはこの金属被膜に電気的に接続された金属ベース
５が設けられている。金属ベース５は、図示してしない
が、直接あるいはコンデンサを介して受光装置本体６の
基準電位部に接続されている。 ７は導電ゴムの円筒で、受光素子本体の金属被膜上に圧
入され、これと電気的に接続されている。 円筒７の内側には周溝８が形成されており、この周溝８
に、受光素子１の前方に配置される電磁シールド部材９
の周縁が嵌め込まれている。 電磁シールド部材９は、透明ガラスあるいは透明プラス
チックを基材として作られ、受光素子１に面する側に酸
化インジウムあるいは金などの被膜が施されている。 １０は光ファイバで、その先端が電磁シールド部材９の
前面に突き当たるように、受光素子１と光軸を一致させ
て配置されている。 光ファイバ１０と受光素子１との光学的結合は両者を接
近させるほど良くなるので、光ファイバ１０の装着時に
は電磁シールド部材９は受光素子１側に押し付けられる
ことになる。また場合によっては、光ファイバ１０は繰
り返し抜き差しされることもある。その際、電磁シール
ド部材９の導電被膜は接触面９ａを介して筒体７に押圧
されるが、筒体７は弾性変形してその押圧力を吸収す
る。FIG. 1 shows an embodiment of the present invention in an optical fiber type photoelectric switch. In the figure, reference numeral 1 is a light receiving element, on which a chip 3 of a photodiode or a phototransistor is mounted on the upper surface of a main body 2, and a transparent cover 4 is further mounted thereon. A metal coating is formed on the peripheral edge of the main body 2, and a metal base 5 electrically connected to the metal coating is provided on the bottom. Although not shown, the metal base 5 is connected to the reference potential part of the light receiving device body 6 directly or via a capacitor. Reference numeral 7 denotes a conductive rubber cylinder which is press-fitted onto the metal coating of the light receiving element body and electrically connected thereto. A circumferential groove 8 is formed inside the cylinder 7, and the circumferential groove 8
And an electromagnetic shield member 9 arranged in front of the light receiving element 1.
The peripheral edge of is fitted. The electromagnetic shield member 9 is made of transparent glass or transparent plastic as a base material, and the side facing the light receiving element 1 is coated with a film of indium oxide, gold, or the like. Reference numeral 10 denotes an optical fiber, which is arranged with its optical axis aligned with that of the light-receiving element 1 so that its tip abuts on the front surface of the electromagnetic shield member 9. The optical coupling between the optical fiber 10 and the light receiving element 1 becomes better as the optical fiber 10 and the light receiving element 1 are brought closer to each other. In some cases, the optical fiber 10 may be repeatedly inserted and removed. At that time, the conductive coating of the electromagnetic shield member 9 is pressed against the cylindrical body 7 via the contact surface 9a, but the cylindrical body 7 is elastically deformed and absorbs the pressing force.
この考案は、電磁シールド部材を導電ゴムの筒体に保持
させるようにしたので、光ファイバから電磁シールド部
材に押圧力が加わっても導電ゴムの伸縮により電磁シー
ルド部材と筒体との接触面の擦れが大幅に軽減される。
したがって、電磁シールド部材の導電膜は基材から剥離
することがなく、電磁シールド部材と導電ゴムの筒体と
の電気的導通を安定して維持することができる。In this invention, since the electromagnetic shield member is held by the conductive rubber cylinder, even if a pressing force is applied from the optical fiber to the electromagnetic shield member, the expansion and contraction of the conductive rubber causes the contact surface between the electromagnetic shield member and the cylindrical body to expand. Rubbing is greatly reduced.
Therefore, the conductive film of the electromagnetic shield member is not separated from the base material, and the electrical continuity between the electromagnetic shield member and the conductive rubber cylinder can be stably maintained.
第１図はこの考案の実施例を示す断面図である。 １：受光素子、７：導電ゴムの筒体、９：電磁シールド
部材、１０：光ファイバ。FIG. 1 is a sectional view showing an embodiment of the present invention. 1: light receiving element, 7: cylindrical body of conductive rubber, 9: electromagnetic shield member, 10: optical fiber.
Claims (1)
を配置した受光装置のシールド構造において、受光素子
の外側に導電ゴムの筒体を被嵌し、この筒体に電磁シー
ルド部材を保持させるようにしたことを特徴とする受光
装置のシールド構造。1. In a shield structure of a light receiving device in which a transparent electromagnetic shield member is arranged in front of a light receiving element, a conductive rubber cylinder is fitted on the outside of the light receiving element, and the electromagnetic shield member is held by this cylinder. A shield structure for a light-receiving device characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987063144U JPH0614380Y2 (en) | 1987-04-25 | 1987-04-25 | Shield structure of photo detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987063144U JPH0614380Y2 (en) | 1987-04-25 | 1987-04-25 | Shield structure of photo detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63171937U JPS63171937U (en) | 1988-11-09 |
| JPH0614380Y2 true JPH0614380Y2 (en) | 1994-04-13 |
Family
ID=30898096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987063144U Expired - Lifetime JPH0614380Y2 (en) | 1987-04-25 | 1987-04-25 | Shield structure of photo detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0614380Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6784933B2 (en) * | 2016-05-13 | 2020-11-18 | Toto株式会社 | Water spouting device and photoelectric sensor |
-
1987
- 1987-04-25 JP JP1987063144U patent/JPH0614380Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63171937U (en) | 1988-11-09 |
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