JP2992260B2 - Photoelectric key operation array - Google Patents
Photoelectric key operation arrayInfo
- Publication number
- JP2992260B2 JP2992260B2 JP10043499A JP4349998A JP2992260B2 JP 2992260 B2 JP2992260 B2 JP 2992260B2 JP 10043499 A JP10043499 A JP 10043499A JP 4349998 A JP4349998 A JP 4349998A JP 2992260 B2 JP2992260 B2 JP 2992260B2
- Authority
- JP
- Japan
- Prior art keywords
- infrared
- infrared light
- room
- transmitting plate
- light
- 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
- Switches Operated By Changes In Physical Conditions (AREA)
- Electronic Switches (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光電式キー操作ア
レイに関し、より詳細には、赤外線透過板の下面に赤外
線発光素子と赤外線受光素子とを並置して設け、赤外線
透過板の上面に指等の遮蔽物により操作する赤外線を用
いた光電式キー操作アレイに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photoelectric key operation array, and more particularly, to an infrared light transmitting element, in which an infrared light emitting element and an infrared light receiving element are juxtaposed on a lower surface of an infrared light transmitting plate, and a finger is provided on an upper surface of the infrared light transmitting plate. The present invention relates to a photoelectric key operation array using infrared light which is operated by a shield such as the above.
【０００２】[0002]
【従来の技術】石油製品や化学液体あるいは食品用液体
等の計量ならびに取引き，プラントの効率向上や運転管
理等のために不可欠な流量計は、流管に接続され、流速
に応じて出力される流量（流速）を検出して電気量に変
換して演算部に表示する測定装置である。通常、演算部
（変換器）は、目視可能なガラス板を有し、メータ定数
や流量設定等のパラメータを設定したり、零点等の調整
を操作するための設定回路を付加した種々のキー操作ア
レイを有しているが、その中で光電式キー操作アレイが
多く使用されている。2. Description of the Related Art A flow meter, which is indispensable for measuring and trading petroleum products, chemical liquids, food-grade liquids, etc., for improving plant efficiency and for operation control, etc., is connected to a flow pipe and outputted according to flow velocity. This is a measuring device that detects a flow rate (flow velocity), converts it into an electric quantity, and displays it on an arithmetic unit. Normally, the arithmetic unit (converter) has a visible glass plate, and various key operations including a setting circuit for setting parameters such as meter constants and flow rate settings, and adjusting zero points and the like. It has an array, of which a photoelectric keying array is often used.
【０００３】光電式キー操作アレイは、赤外線を透過す
る赤外線透過板の下面に設けられ、この赤外線透過板に
向けて発光する赤外線発光素子と、赤外線透過板の下面
に赤外線発光素子と並置して設けられ反射光を受光する
赤外線受光素子とからなり、赤外線透過板の上面に遮蔽
物を近接したとき、赤外線透過板の下面方向から発光さ
れる赤外線を遮蔽物により乱反射させ、乱反射した赤外
線を赤外線受光素子で検知し、光電変換信号として出力
するもので、通常、複数個のキーを備えている。The photoelectric key operation array is provided on the lower surface of an infrared transmitting plate that transmits infrared light, and an infrared light emitting element that emits light toward the infrared transmitting plate, and an infrared light emitting element that is juxtaposed on the lower surface of the infrared transmitting plate. An infrared light receiving element for receiving reflected light is provided.When a shield is brought close to the upper surface of the infrared transmission plate, the infrared light emitted from the lower surface of the infrared transmission plate is irregularly reflected by the shield, and the diffused infrared light is reflected by the infrared light. Detected by a light receiving element and output as a photoelectric conversion signal, usually provided with a plurality of keys.
【０００４】図３は、従来の光電式キー操作アレイの一
部断面図で、図中、２１は赤外線発光素子、２２は赤外
線受光素子、２３は赤外線不透過性シールド、２４は光
ガイド、２５は赤外線透過板、２６は指などの遮蔽物で
ある。FIG. 3 is a partial sectional view of a conventional photoelectric key operation array. In the figure, 21 is an infrared light emitting element, 22 is an infrared light receiving element, 23 is an infrared impermeable shield, 24 is a light guide, 25 Is an infrared transmitting plate, and 26 is a shield such as a finger.
【０００５】赤外線発光素子２１および赤外線受光素子
２２は赤外線透過板２５の下面側に配置され、赤外線発
光素子２１と赤外線受光素子２２との間には赤外線不透
過性シールド２３が設けられ赤外線発光素子２１から放
射された赤外線が直接赤外線受光素子２２に達しないよ
うにしている。赤外線発光素子２１から放射される赤外
線は赤外線透過板２５に対して垂直方向に集束されるよ
うにしている。[0005] The infrared light emitting element 21 and the infrared light receiving element 22 are arranged on the lower surface side of the infrared transmitting plate 25, and an infrared impermeable shield 23 is provided between the infrared light emitting element 21 and the infrared light receiving element 22. The infrared rays radiated from 21 do not directly reach the infrared light receiving element 22. The infrared light emitted from the infrared light emitting element 21 is focused on the infrared transmission plate 25 in the vertical direction.
【０００６】赤外線受光素子２２は赤外線をシールドす
る筒状の光ガイド２４に収められ赤外線透過板２５の屈
折や面反射等を考慮し、指などの遮蔽物２６により乱反
射した赤外線のみが赤外線受光素子２２に達し、それ以
外の赤外線は赤外線受光素子２２に達しないように、光
ガイド２４の赤外線透過板２５の下面に対する角度が定
められている。The infrared light receiving element 22 is accommodated in a cylindrical light guide 24 for shielding infrared light, and considering only the refraction and surface reflection of the infrared transmitting plate 25, only infrared light irregularly reflected by a shield 26 such as a finger is received by the infrared light receiving element. The angle of the light guide 24 with respect to the lower surface of the infrared transmission plate 25 is determined so that the light reaches the infrared light receiving element 22 and the other infrared light does not reach the infrared light receiving element 22.
【０００７】この構成の光電式キー操作アレイは、部品
性能のばらつきの影響を直接受けるという欠点があった
ため、これを改良した発明がなされた（特願平９−７６
８２１号）。この発明の技術（以下、従来技術という）
は、赤外線を透過する赤外線透過板の上面に指を近接し
たとき、赤外線透過板の下面にて反射される反射光に基
づいて光電式キーを複数備えた光電式キー操作アレイに
おいて、光電式キーを赤外線透過板の下面の第１の部屋
に設置した赤外線発光素子と、該第１の部屋に並置した
第２の部屋に収納され前記赤外線発光素子からの赤外線
を受光する赤外線受光素子と、前記第１の部屋の内面に
設けた赤外線吸収板と、前記第２の部屋の内面に設けた
赤外線反射板とから構成したことを特徴とし、もって、
有効な光束を得ることができ、乱反射した赤外線の赤外
線受光素子への集光効率が増加し、検出感度の向上を可
能にしたものである。[0007] The photoelectric key operation array having this configuration has a drawback that it is directly affected by variations in the performance of components, and an invention has been made to improve this disadvantage (Japanese Patent Application No. 9-76).
No. 821). Techniques of the present invention (hereinafter referred to as conventional techniques)
When a finger approaches an upper surface of an infrared transmitting plate that transmits infrared light, a photoelectric key operating array including a plurality of photoelectric keys based on reflected light reflected on the lower surface of the infrared transmitting plate. An infrared light emitting element installed in a first room on the lower surface of the infrared transmitting plate, an infrared light receiving element housed in a second room juxtaposed to the first room and receiving infrared light from the infrared light emitting element, An infrared absorbing plate provided on the inner surface of the first room and an infrared reflecting plate provided on the inner surface of the second room,
An effective luminous flux can be obtained, the efficiency of collecting irregularly reflected infrared rays on the infrared light receiving element is increased, and the detection sensitivity can be improved.
【０００８】図４は、従来技術による光電式キー操作ア
レイの一部断面図で、図中、３１は光電式キー操作アレ
イ、３２は赤外線透過板、３３は赤外線透過フィルタ、
３４は遮光壁、３５は赤外線発光素子、３６は赤外線受
光素子、３７は吸収板、３８は反射板、３９は指等の遮
蔽物である。FIG. 4 is a partial sectional view of a conventional photoelectric key operation array. In the figure, reference numeral 31 denotes a photoelectric key operation array, 32 denotes an infrared transmitting plate, 33 denotes an infrared transmitting filter,
34 is a light shielding wall, 35 is an infrared light emitting element, 36 is an infrared light receiving element, 37 is an absorbing plate, 38 is a reflecting plate, and 39 is a shield such as a finger.
【０００９】図４に示した光電式キー操作アレイ３１に
おいて、赤外線発光素子３５から放射された赤外線は赤
外線透過フィルタ３３および赤外線透過板３２を通り、
該赤外線透過板３２の上面に近接された指等の遮蔽物３
９で乱反射し、乱反射した赤外線の光束として再び赤外
線透過板３２および赤外線透過フィルタ３３を通り、直
接光および反射板３８に反射された反射光として赤外線
受光素子３６の受光可能範囲に集光する。In the photoelectric key operation array 31 shown in FIG. 4, infrared rays emitted from the infrared light emitting element 35 pass through the infrared transmission filter 33 and the infrared transmission plate 32,
Shielding object 3 such as a finger which is brought close to the upper surface of infrared transmitting plate 32
At 9, the light flux of the irregularly reflected infrared light again passes through the infrared transmitting plate 32 and the infrared transmitting filter 33, and is condensed as direct light and the reflected light reflected by the reflecting plate 38 in the receivable range of the infrared light receiving element 36.
【００１０】[0010]
【発明が解決しようとする課題】本発明者は、従来技術
について更に研究を重ねた結果、赤外線発光素子からの
赤外線は、上方に対して四方八方に拡散するため、ガラ
ス板（赤外線透過板）に鋭角に当たる光束に基づく反射
光が結果的に赤外線受光素子に到達する、また赤外線発
光素子の輝度，赤外線受光素子の感度にどうしてもばら
つきがあり、特に輝度は順電流の大きさに比例するた
め、順電流の誤差が輝度に影響し、これらが相まってス
イッチ感度のばらつきになることを見出した。As a result of further studies on the prior art, the present inventor has found that infrared rays from an infrared light emitting element diffuse in all directions upward, so that a glass plate (infrared transmitting plate) is used. The reflected light based on the luminous flux hitting the acute angle eventually reaches the infrared light receiving element, and the luminance of the infrared light emitting element and the sensitivity of the infrared light receiving element are inevitably varied. In particular, since the luminance is proportional to the magnitude of the forward current, It has been found that an error in the forward current affects the luminance, and these factors together cause variations in switch sensitivity.
【００１１】本発明は、上述のような実情に鑑みなされ
たもので、赤外線透過板に鋭角に当たる赤外線の影響を
受けにくくし、スイッチ感度のばらつきの影響を受けな
い光電式キー操作アレイを提供するものである。The present invention has been made in view of the above circumstances, and provides a photoelectric key operation array which is hardly affected by an infrared ray which strikes an infrared transmitting plate at an acute angle and which is not affected by variations in switch sensitivity. Things.
【００１２】[0012]
【課題を解決するための手段】請求項１の発明は、赤外
線を透過する赤外線透過板の上面に遮蔽物を近接するこ
とにより、前記赤外線透過板の下面方向から放射される
赤外線を乱反射させ、該乱反射する前記赤外線の反射光
に基づいて操作する光電式キーを複数備えた光電式キー
操作アレイにおいて、前記光電式キーは、前記赤外線透
過板の下面に設けられ、前記赤外線透過板に向け前記赤
外線を放射する赤外線発光素子と、前記赤外線透過板上
面から遮蔽物により乱反射された前記赤外線を受光する
赤外線受光素子と、前記赤外線発光素子を設置する第１
の部屋と前記赤外線受光素子を設置する第２の部屋を有
する遮光体から成り、前記赤外線受光素子は当該受光面
を前記赤外線発光素子に対して反対方向に向け、かつ前
記第２の部屋の設置面に対して所定角度傾斜すると共
に、前記第２の部屋は前記赤外線受光素子の受光面に対
向する面を前記赤外線を反射する赤外線反射面としたこ
とを特徴とし、もって、赤外線透過板に対して鋭角に当
たる光束の影響を受けにくくし、スイッチ感度のばらつ
きの影響をなくし、さらに所要のパス光の赤外線のみが
赤外線受光素子に到達するようにしたものである。According to the first aspect of the present invention, an infrared ray radiated from a lower surface direction of the infrared transmitting plate is irregularly reflected by bringing a shielding object close to an upper surface of the infrared transmitting plate that transmits infrared light. In a photoelectric key operation array including a plurality of photoelectric keys that are operated based on the reflected light of the infrared light that is irregularly reflected, the photoelectric key is provided on a lower surface of the infrared light transmitting plate and faces the infrared light transmitting plate. An infrared light emitting element that emits infrared light, an infrared light receiving element that receives the infrared light that is irregularly reflected by a shield from the upper surface of the infrared light transmitting plate, and a first light emitting element that includes the infrared light emitting element
And a light-shielding body having a second room for installing the infrared light receiving element, wherein the infrared light receiving element faces the light receiving surface in the opposite direction to the infrared light emitting element, and installs the second room. When inclined at a predetermined angle to the surface,
The second room is opposite to a light receiving surface of the infrared light receiving element.
The facing surface is an infrared reflecting surface that reflects the infrared light.
This feature makes it possible to apply an acute angle to the infrared transmitting plate.
Difficult to be affected by dripping light flux, variation in switch sensitivity
And eliminates only the infrared light of the required path light.
It reaches the infrared light receiving element .
【００１３】請求項２の発明は、請求項１の発明におい
て、前記遮光体の上面の少なくとも前記第１の部屋と前
記第２に部屋との間を赤外線吸収面としたことを特徴と
し、もって、赤外線受光素子方向への不要な赤外線の反
射を防止するようにしたものである。 According to a second aspect of the present invention, in the first aspect of the present invention, at least the first room and the front of the upper surface of the light shield are provided.
The second feature is that an infrared absorbing surface is provided between the room and the room.
Therefore, unnecessary infrared rays are reflected toward the infrared receiving element.
It is designed to prevent shooting.
【００１４】[0014]
【００１５】[0015]
【発明の実施の形態】図１は、本発明の一実施例を示す
光電式キー操作アレイの光電式キー部分の断面図で、図
中、１はＬＥＤ等の赤外線発光素子、２はフォトＩＣ等
の赤外線受光素子、３は遮光体、３ａ，３ｂは部屋、４
はプリント基板、５は遮光体の上面、６は部屋３ｂの赤
外線反射面、７は赤外線透過板、８は赤外線透過フィル
タ、９は指などの遮蔽物、Ｌは光路である。FIG. 1 is a cross-sectional view of a photoelectric key portion of a photoelectric key operation array showing one embodiment of the present invention. In the drawing, reference numeral 1 denotes an infrared light emitting element such as an LED, and 2 denotes a photo IC. Etc., 3 is a light shield, 3a and 3b are rooms, 4
Is a printed board, 5 is an upper surface of a light shield, 6 is an infrared reflecting surface of the room 3b, 7 is an infrared transmitting plate, 8 is an infrared transmitting filter, 9 is a shield such as a finger, and L is an optical path.
【００１６】光電式キー操作アレイは、赤外線透過板７
の下面に面平行な赤外線透過フィルタ８を配置し、該赤
外線透過フィルタ８の下面側に遮光体３内に対をなす赤
外線発光素子１と赤外線受光素子２が並置されたもの
で、少なくとも２個以上並置されている。The photoelectric key operation array includes an infrared transmitting plate 7.
A surface-parallel infrared transmission filter 8 is arranged on the lower surface of the light-transmitting filter 8, and a pair of infrared light-emitting elements 1 and infrared light-receiving elements 2 are juxtaposed in a light shielding body 3 on the lower surface side of the infrared transmission filter 8. These are juxtaposed.
【００１７】赤外線透過板７は、例えば、耐圧防爆規格
を満足する、爆発及び外部衝撃に耐えられる強度の板厚
が、例えば、５ｍｍ以上のガラス板で、指などの遮蔽物
９が近接可能になっている。この赤外線透過板７は、赤
外線以外の光を遮断し、太陽光等による誤動作を防止す
る。赤外線透過フィルタ８は、赤外線以外の光を遮断
し、太陽光等による誤作動を防止する。The infrared transmitting plate 7 is a glass plate which satisfies, for example, an explosion-proof standard and has a thickness of, for example, 5 mm or more that can withstand an explosion and an external impact. Has become. The infrared transmission plate 7 blocks light other than infrared light, and prevents malfunction due to sunlight or the like. The infrared transmission filter 8 blocks light other than infrared light and prevents malfunction due to sunlight or the like.
【００１８】遮光体３は、例えば、不透明な樹脂成形材
で、赤外線発光素子１を設置する部屋３ａと赤外線受光
素子２を設置する部屋３ｂを有し、部屋３ａと部屋３ｂ
との間は赤外線発光素子１から放射される赤外線を赤外
線受光素子２が直接受光しないように遮断されている。
部屋３ａ内には、ＬＥＤ（Light Emittion Diode）等の
赤外線を発光する赤外線発光素子１がプリント基板４に
設置され、部屋３ｂ内には、赤外線受光素子２がプリン
ト基板４に設置されるとともに、受光面を赤外線発光素
子１に対して反対方向に向け、かつプリント基板４に対
して所定角度（α）傾斜して取り付けられ設置されてい
る。The light-shielding body 3 is, for example, an opaque resin molding material, and has a room 3a in which the infrared light emitting element 1 is installed and a room 3b in which the infrared light receiving element 2 is installed.
Are blocked so that the infrared light receiving element 2 does not directly receive infrared light emitted from the infrared light emitting element 1.
In the room 3a, an infrared light emitting element 1 that emits infrared light such as an LED (Light Emittion Diode) is installed on a printed circuit board 4. In the room 3b, an infrared light receiving element 2 is installed on the printed circuit board 4. The light receiving surface is attached to the infrared light emitting element 1 in a direction opposite to that of the infrared light emitting element 1 and is inclined at a predetermined angle (α) with respect to the printed circuit board 4.
【００１９】上述の構造の光電式キー操作アレイにおい
て、赤外線発光素子１から放射された赤外線は赤外線透
過フィルタ８および赤外線透過板７を通り、該赤外線透
過板７の上面に近接する指等の遮蔽物９で乱反射し、乱
反射した赤外線は再び赤外線透過板７および赤外線透過
フィルタ８を通り、部屋３ｂの反射面６に反射された赤
外線として赤外線受光素子２に到達する。In the photoelectric key operation array having the above-described structure, infrared rays emitted from the infrared light emitting element 1 pass through the infrared light transmitting filter 8 and the infrared light transmitting plate 7 to shield a finger or the like close to the upper surface of the infrared light transmitting plate 7. The irregularly reflected infrared light from the object 9 passes through the infrared transmitting plate 7 and the infrared transmitting filter 8 again, and reaches the infrared light receiving element 2 as infrared light reflected on the reflecting surface 6 of the room 3b.
【００２０】このとき、赤外線受光素子２は、その受光
面を赤外線発光素子１に対して反対方向に向け、かつプ
リント基板４に対して所定角度（α）傾斜して取り付け
られているので、遮蔽物９が赤外線透過板７から感応し
ない距離（位置Ａ）にあるときは、赤外線発光素子１か
ら発光された赤外線が遮蔽物９に到達せず、かつ、赤外
線透過板７の下面で乱反射した赤外線も赤外線受光素子
２に到達しないので、キーはＯＦＦ状態である。遮蔽物
９が赤外線透過板７からの感応距離（位置Ｂ）に近づく
と、赤外線発光素子１から発光された赤外線は、赤外線
透過板７の上面で乱反射され、さらに部屋３ｂの反射面
６にて反射され、赤外線受光素子２に到達することによ
り、キーがＯＮ状態となる。特に、前記反射面６を白色
にしておくと、赤外線発光素子１からの赤外線の反射を
促進するので、所要の光束を確保できる。その結果、赤
外線透過板７に対して鋭角に当たる光束の影響を受けに
くくなると共に、部屋３ｂの反射面６で再反射した所要
の赤外線を受けることが可能となる。このことは、赤外
線発光素子１の輝度を上げた場合に有効である。角度α
は、鋭角、好ましくはα＝４５°〜６０°となるように
プリント基板４に固着することが望ましい。At this time, since the infrared light receiving element 2 is attached with its light receiving surface directed in the opposite direction to the infrared light emitting element 1 and inclined at a predetermined angle (α) with respect to the printed circuit board 4, it is shielded. When the object 9 is at a distance (position A) that is insensitive to the infrared transmitting plate 7, the infrared light emitted from the infrared light emitting element 1 does not reach the shield 9, and the infrared light reflected irregularly on the lower surface of the infrared transmitting plate 7. Key does not reach the infrared light receiving element 2, the key is in the OFF state. When the shield 9 approaches the sensitive distance (position B) from the infrared transmitting plate 7, the infrared light emitted from the infrared light emitting element 1 is irregularly reflected on the upper surface of the infrared transmitting plate 7, and further reflected on the reflecting surface 6 of the room 3b. The key is turned on by being reflected and reaching the infrared light receiving element 2. In particular, if the reflection surface 6 is white, reflection of infrared rays from the infrared light emitting element 1 is promoted, so that a required light flux can be secured. As a result, it is less likely to be affected by a light beam that strikes the infrared transmitting plate 7 at an acute angle, and it is possible to receive required infrared light that has been re-reflected by the reflecting surface 6 of the room 3b. This is effective when the luminance of the infrared light emitting element 1 is increased. Angle α
Is preferably fixed to the printed circuit board 4 at an acute angle, preferably α = 45 ° to 60 °.
【００２１】図２は、本発明の他の実施例を示す光電式
キー操作アレイの光電式キー部分の断面図で、図中、１
０は黒色テープ、１１は黒色チューブである。図１と同
じ構成部品には同じ参照番号を付し説明を省略する。黒
色テープ１０は、遮光体３の上面５の全体に、又は、少
なくとも第１の部屋と第２の部屋との間に貼付してあ
る。黒色チューブ１１は、赤外線発光素子１を取り囲む
ように赤外線発光素子１を収納した部屋３ａに取り付け
てある。FIG. 2 is a sectional view of a photoelectric key portion of a photoelectric key operation array showing another embodiment of the present invention.
0 is a black tape and 11 is a black tube. The same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. The black tape 10 is affixed to the entire upper surface 5 of the light shield 3 or at least between the first room and the second room. The black tube 11 is attached to the room 3 a in which the infrared light emitting element 1 is stored so as to surround the infrared light emitting element 1.
【００２２】図２の構成により、黒色テープ１０で赤外
線発光素子１から発光した赤外線のうち、赤外線受光素
子２方向への不要な赤外線の反射を防止し、黒色チュー
ブ１１で赤外線発光素子１を収納した部屋３ａ内におい
て赤外線発光素子１から発光した赤外線のうち、赤外線
透過板７方向以外の不要な赤外線を吸収する。With the configuration shown in FIG. 2, of the infrared light emitted from the infrared light emitting element 1 by the black tape 10, unnecessary reflection of infrared light toward the infrared light receiving element 2 is prevented, and the infrared light emitting element 1 is accommodated by the black tube 11. Of the infrared light emitted from the infrared light emitting element 1 in the room 3a, unnecessary infrared light other than the infrared light transmitting plate 7 is absorbed.
【００２３】[0023]
【発明の効果】請求項１に係る発明は、赤外線を透過す
る赤外線透過板の上面に遮蔽物を近接することにより、
前記赤外線透過板の下面方向から放射される赤外線を乱
反射させ、該乱反射する前記赤外線の反射光に基づいて
操作する光電式キーを複数備えた光電式キー操作アレイ
において、前記光電式キーは、前記赤外線透過板の下面
に設けられ、前記赤外線透過板に向け前記赤外線を放射
する赤外線発光素子と、前記赤外線透過板上面から遮蔽
物により乱反射された前記赤外線を受光する赤外線受光
素子と、前記赤外線発光素子を設置する第１の部屋と前
記赤外線受光素子を設置する第２の部屋を有する遮光体
から成り、前記赤外線受光素子は当該受光面を前記赤外
線発光素子に対して反対方向に向け、かつ前記第２の部
屋の設置面に対して所定角度傾斜すると共に、前記第２
の部屋は前記赤外線受光素子の受光面に対向する面を前
記赤外線を反射する赤外線反射面としたので、赤外線透
過板に対して鋭角に当たる光束の影響を受けにくくなる
と共に、遮光体の部屋の反射面で再反射した所要の赤外
線のみ受光することができ、このため、赤外線発光素子
の輝度を上げても、赤外線受光素子への集光が確実とな
り、従って、赤外線発光素子、赤外線受光素子等に製品
のばらつきによるスイッチ感度のばらつきがあった場合
でも、正確なスイッチング動作を行うことができる。さ
らに、前記第２の部屋の内面の赤外線受光素子の受光面
に対向する面を赤外線を反射する赤外線反射面としたの
で、赤外線受光素子に不要な光が入るのを防ぎ、所要の
光束の赤外線のみを確実に赤外線受光素子に到達させる
ことができる効果を奏するものである。 According to the first aspect of the present invention, a shielding object is brought close to the upper surface of an infrared transmitting plate that transmits infrared light.
In a photoelectric key operation array including a plurality of photoelectric keys for irregularly reflecting infrared light radiated from the lower surface direction of the infrared transmitting plate and operating based on the reflected light of the irregularly reflected infrared light, the photoelectric key operation includes: An infrared light emitting element provided on a lower surface of the infrared transmitting plate, for emitting the infrared light toward the infrared transmitting plate, an infrared light receiving element for receiving the infrared light irregularly reflected by a shield from the upper surface of the infrared transmitting plate, and the infrared light emitting element A light-shielding body having a first room for installing an element and a second room for installing the infrared light-receiving element, wherein the infrared light-receiving element faces the light-receiving surface in a direction opposite to the infrared light-emitting element, and In addition to being inclined at a predetermined angle with respect to the installation surface of the second room,
The room facing the light receiving surface of the infrared light receiving element
Since the infrared reflection surface reflects infrared light,
Being less susceptible to luminous flux that strikes the superplate at an acute angle
In addition, the required infrared light that has been re-reflected by the reflective surface of the light-shielding room
Can only receive light, and therefore infrared
Even if the brightness of the
Therefore, products such as infrared light emitting elements and infrared light receiving elements
When there is variation in switch sensitivity due to variation in
However, accurate switching operation can be performed. Sa
A light receiving surface of an infrared light receiving element on an inner surface of the second room;
The surface facing the surface is an infrared reflecting surface that reflects infrared light
This prevents unnecessary light from entering the infrared light receiving element,
Ensures that only the infrared rays of the light beam reach the infrared receiving element
It has an effect that can be done.
【００２４】請求項２に係る発明は、請求項１に係る発
明の効果に加えて、前記遮光体の上面の少なくとも第１
の部屋と第２の部屋との間を赤外線吸収面としたので、
赤外線受光素子方向への不要な赤外線の反射を防止する
ことができる According to a second aspect of the present invention, in addition to the effects of the first aspect of the invention , at least a first surface of the upper surface of the light shielding body is provided.
Since the space between the room and the second room was an infrared absorbing surface,
Prevents unnecessary reflection of infrared light toward the infrared light receiving element
be able to
【００２５】[0025]
【図面の簡単な説明】[Brief description of the drawings]
【図１】 本発明の一実施例を示す光電式キー操作アレ
イの光電式キー部分の断面図である。FIG. 1 is a cross-sectional view of a photoelectric key portion of a photoelectric key operation array showing one embodiment of the present invention.
【図２】 本発明の他の実施例を示す光電式キー操作ア
レイの光電式キー部分の断面図である。FIG. 2 is a sectional view of a photoelectric key portion of a photoelectric key operation array showing another embodiment of the present invention.
【図３】 従来の光電式キー操作アレイの一部断面図で
ある。FIG. 3 is a partial cross-sectional view of a conventional photoelectric key operation array.
【図４】 従来の他の光電式キー操作アレイの一部断面
図である。FIG. 4 is a partial cross-sectional view of another conventional photoelectric key operation array.
１…赤外線発光素子、２…赤外線受光素子、３…遮光
体、３ａ，３ｂ…部屋、４…プリント基板、５…遮光体
の上面、６…反射面、７…赤外線透過板、８…赤外線透
過フィルタ、９…指などの遮蔽物、１０…黒色テープ、
１１…黒色チューブ、２１…赤外線発光素子、２２…赤
外線受光素子、２３…赤外線不透過性シールド、２４…
光ガイド、２５…赤外線透過板、２６…指などの遮蔽
物、３１…光電式キー操作アレイ、３２…赤外線透過
板、３３…赤外線透過フィルタ、３４…遮光壁、３５…
赤外線発光素子、３６…赤外線受光素子、３７…吸収
板、３８…反射板、３９…指等の遮蔽物、Ｌ…光路。DESCRIPTION OF SYMBOLS 1 ... Infrared light emitting element, 2 ... Infrared light receiving element, 3 ... Light shielding body, 3a, 3b ... Room, 4 ... Printed circuit board, 5 ... Upper surface of light shielding body, 6 ... Reflection surface, 7 ... Infrared transmission plate, 8 ... Infrared transmission Filter, 9 ... Shielding material such as finger, 10 ... Black tape,
11: black tube, 21: infrared light emitting element, 22: infrared light receiving element, 23: infrared opaque shield, 24 ...
Light guide, 25: infrared transmitting plate, 26: shield such as finger, 31: photoelectric key operation array, 32: infrared transmitting plate, 33: infrared transmitting filter, 34: light shielding wall, 35 ...
Infrared light emitting element, 36: infrared light receiving element, 37: absorbing plate, 38: reflecting plate, 39: shielding object such as finger, L: optical path.
フロントページの続き (56)参考文献 特開 平７−335099（ＪＰ，Ａ) 特開 平４−154083（ＪＰ，Ａ) 特開 昭58−181223（ＪＰ，Ａ) 特開 平６−223685（ＪＰ，Ａ) 特開 昭64−67962（ＪＰ，Ａ) 実開 昭61−26236（ＪＰ，Ｕ) 実開 昭60−30419（ＪＰ，Ｕ) 実開 平２−111032（ＪＰ，Ｕ) 実開 平３−80942（ＪＰ，Ｕ) 実開 昭61−104305（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) H01H 35/00 H03K 17/74 - 17/98 Continuation of front page (56) References JP-A-7-335099 (JP, A) JP-A-4-1544083 (JP, A) JP-A-58-181223 (JP, A) JP-A-6-223685 (JP) JP-A-64-67962 (JP, A) JP-A-61-26236 (JP, U) JP-A-60-30419 (JP, U) JP-A-2-111032 (JP, U) JP-A 3-80942 (JP, U) Fully open 1986-104305 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) H01H 35/00 H03K 17/74-17/98
Claims (2)
遮蔽物を近接することにより、前記赤外線透過板の下面
方向から放射される赤外線を乱反射させ、該乱反射する
前記赤外線の反射光に基づいて操作する光電式キーを複
数備えた光電式キー操作アレイにおいて、前記光電式キ
ーは、前記赤外線透過板の下面に設けられ、前記赤外線
透過板に向け前記赤外線を放射する赤外線発光素子と、
前記赤外線透過板上面から遮蔽物により乱反射された前
記赤外線を受光する赤外線受光素子と、前記赤外線発光
素子を設置する第１の部屋と前記赤外線受光素子を設置
する第２の部屋を有する遮光体から成り、前記赤外線受
光素子は当該受光面を前記赤外線発光素子に対して反対
方向に向け、かつ前記第２の部屋の設置面に対して所定
角度傾斜すると共に、前記第２の部屋は前記赤外線受光
素子の受光面に対向する面を前記赤外線を反射する赤外
線反射面としたことを特徴とする光電式キー操作アレ
イ。1. An infrared light radiating from a lower surface direction of the infrared transmitting plate is irregularly reflected by bringing a shielding object close to an upper surface of the infrared transmitting plate transmitting the infrared light, based on the reflected light of the irregularly reflected infrared light. In a photoelectric key operation array including a plurality of photoelectric keys to be operated, the photoelectric key is provided on a lower surface of the infrared transmitting plate, and an infrared light emitting element that emits the infrared light toward the infrared transmitting plate,
An infrared light receiving element for receiving the infrared light irregularly reflected by a shield from the upper surface of the infrared transmitting plate, and a light shield having a first room for installing the infrared light emitting element and a second room for installing the infrared light receiving element. The infrared light receiving element faces the light receiving surface in the opposite direction to the infrared light emitting element, and is inclined at a predetermined angle with respect to the installation surface of the second room, and the second room receives the infrared light.
The surface opposite to the light receiving surface of the element is reflected by infrared light
A photoelectric key operation array having a line reflection surface .
の部屋と前記第２の部屋との間を赤外線吸収面としたこ
とを特徴とする請求項１に記載の光電式キー操作アレ
イ。 2. The light-shielding body according to claim 1, wherein at least the first portion of the upper surface of the light-shielding member is provided.
2. The photoelectric key operation array according to claim 1, wherein an infrared absorbing surface is provided between the room and the second room. 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10043499A JP2992260B2 (en) | 1998-02-25 | 1998-02-25 | Photoelectric key operation array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10043499A JP2992260B2 (en) | 1998-02-25 | 1998-02-25 | Photoelectric key operation array |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11242926A JPH11242926A (en) | 1999-09-07 |
| JP2992260B2 true JP2992260B2 (en) | 1999-12-20 |
Family
ID=12665418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10043499A Expired - Fee Related JP2992260B2 (en) | 1998-02-25 | 1998-02-25 | Photoelectric key operation array |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2992260B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002084177A (en) * | 2000-09-06 | 2002-03-22 | Aiphone Co Ltd | Optical proximity sensor device |
| US9525093B2 (en) | 2009-06-30 | 2016-12-20 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Infrared attenuating or blocking layer in optical proximity sensor |
| US8957380B2 (en) | 2009-06-30 | 2015-02-17 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Infrared attenuating or blocking layer in optical proximity sensor |
| US9733357B2 (en) * | 2009-11-23 | 2017-08-15 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Infrared proximity sensor package with improved crosstalk isolation |
| US8841597B2 (en) | 2010-12-27 | 2014-09-23 | Avago Technologies Ip (Singapore) Pte. Ltd. | Housing for optical proximity sensor |
-
1998
- 1998-02-25 JP JP10043499A patent/JP2992260B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11242926A (en) | 1999-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4051365A (en) | Photoelectric detector having an indicator for indicating the operating condition thereof | |
| US9007568B2 (en) | Distance detecting induction device | |
| EP1313222B1 (en) | Method and apparatus for self-monitoring of proximity sensors | |
| US3683196A (en) | Differential fluid level detector | |
| US8410421B2 (en) | Detector surface constructed from one or a plurality of planar optical waveguides | |
| EP0349694B1 (en) | A detecting apparatus | |
| US4880969A (en) | Optical touch panel with heat sink | |
| JP5583120B2 (en) | Photoelectric switch and method for detecting objects | |
| WO2010022664A1 (en) | Distance detection induction device | |
| WO2010022667A1 (en) | Distance detecting induction device | |
| EP1026485B1 (en) | Ultraviolet detector | |
| GB2159270A (en) | Flowmeter | |
| JP2992260B2 (en) | Photoelectric key operation array | |
| JP2000193586A (en) | Optical raindrop detector | |
| JP2004061482A (en) | Reflection type photosensor | |
| US4754150A (en) | Photoelectric smoke detector | |
| EP0175940B1 (en) | Photoelectric smoke detector | |
| JP2010040006A (en) | Photoelectric smoke sensor and lighting apparatus | |
| JP6448916B2 (en) | Reflector used in reflection mode detector | |
| JP3758181B2 (en) | Infrared switch device | |
| CN220207854U (en) | Photoelectric sensor | |
| JPH10122953A (en) | Reflection type photosensor | |
| JP3080630B2 (en) | Semiconductor vibration sensor | |
| JPS6339839Y2 (en) | ||
| JPH07103892A (en) | Photoelectric smoke detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081015 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081015 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091015 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101015 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101015 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111015 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121015 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131015 Year of fee payment: 14 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |