JP5828073B2

JP5828073B2 - Infrared sensor

Info

Publication number: JP5828073B2
Application number: JP2011232169A
Authority: JP
Inventors: 研治安達; 壮山本; 尚紀柴田; 北地　範行; 範行北地; 伊藤　良泰; 良泰伊藤; 朋弘穐田
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2011-10-21
Filing date: 2011-10-21
Publication date: 2015-12-02
Anticipated expiration: 2031-10-21
Also published as: JP2013088403A

Description

本発明は、物体検知センサとして用いられる赤外線センサに関するものである。 The present invention relates to an infrared sensor used as an object detection sensor.

従来から、物体検知センサとして赤外線センサが用いられている(例えば特許文献１参照)。この赤外線センサからなる物体検知センサ１は、図６に示すように、基板１０上に赤外線の発光部２と受光部３とが装着されている。そして、基板１０（発光部２と受光部３）から所定の距離離れた位置に手等の物体が位置する時に、発光部２から発光された赤外線が前記物体で反射して受光部３で最も強く受光されるように、発光方向と受光方向とが調節される。 Conventionally, infrared sensors have been used as object detection sensors (see, for example, Patent Document 1). As shown in FIG. 6, the object detection sensor 1 including the infrared sensor has an infrared light emitting unit 2 and a light receiving unit 3 mounted on a substrate 10. When an object such as a hand is positioned at a predetermined distance from the substrate 10 (the light emitting unit 2 and the light receiving unit 3), the infrared light emitted from the light emitting unit 2 is reflected by the object and is most reflected by the light receiving unit 3. The light emitting direction and the light receiving direction are adjusted so that the light is strongly received.

発光方向と受光方向の調節は、リード線２５が曲げられることで発光素子２２から最も強く発光する方向が調節され、リード線３５が曲げられることで受光素子３２が最も強く受光する方向が調節されて行われている。 The light emitting direction and the light receiving direction are adjusted by adjusting the direction in which the light emitting element 22 emits the strongest light by bending the lead wire 25, and adjusting the direction in which the light receiving element 32 receives the strongest light by bending the lead wire 35. Has been done.

特開２００１−３２９５８３号公報JP 2001-329583 A

しかしながら、リード線２５、３５が曲げられることで発光方向と受光方向の調節が行われる場合、方向の調節が難しいものであった。 However, when the light emitting direction and the light receiving direction are adjusted by bending the lead wires 25 and 35, it is difficult to adjust the direction.

本発明は上記従来の問題点に鑑みて発明したものであって、その目的とするところは、基板に装着される発光部の発光方向と受光部の受光方向の調節が容易に行われる赤外線センサを提供することを課題とするものである。 The present invention has been invented in view of the above-described conventional problems, and an object of the present invention is to provide an infrared sensor that can easily adjust the light emitting direction of the light emitting unit mounted on the substrate and the light receiving direction of the light receiving unit. It is a problem to provide.

上記課題を解決するために、本発明は、以下のような構成とする。 In order to solve the above problems, the present invention has the following configuration.

赤外線の発光部と受光部とが装着される基板を備え、前記基板は、前記発光部と前記受光部とが装着される略平坦な被装着面を有し、前記発光部と前記受光部はそれぞれ、底面が前記被装着面に装着される略平坦な装着面となるケーシングと、前記基板が収容され遮光部材で形成される内ケースと、前記内ケースが収容され透光部材からなる外ケースとを備え、前記発光部は、最も強く発光する発光方向が前記底面と垂直な方向となる発光素子を前記ケーシングに備え、前記受光部は、最も強く受光する受光方向が前記底面と垂直な方向となる受光素子を前記ケーシングに備え、前記発光素子を起点として前記最も強く発光する発光方向に進む線上にのみ、前記発光素子から発光して前記最も強く発光する発光方向に進行する赤外線を、前記受光素子が位置する側に傾斜して進行するように屈折させる屈折部が設けられ、前記内ケースは、前記発光部と前記受光部の発光方向と受光方向に対応する部分に穿設される透光部を有し、各屈折部が前記透光部に嵌るように前記外ケースに一体に設けられることを特徴とする。 An infrared light emitting unit and a light receiving unit are mounted on the substrate, the substrate having a substantially flat mounting surface on which the light emitting unit and the light receiving unit are mounted, and the light emitting unit and the light receiving unit are A casing whose bottom surface is a substantially flat mounting surface to be mounted on the mounting surface, an inner case in which the substrate is accommodated and formed of a light shielding member, and an outer case in which the inner case is accommodated and made of a translucent member The light emitting unit includes a light emitting element in which the light emitting direction in which light is emitted most strongly is a direction perpendicular to the bottom surface, and the light receiving unit is in a direction in which the light receiving direction in which light is most strongly received is perpendicular to the bottom surface. become a light receiving element to said casing, said light emitting element on the line proceed to the light emitting direction of the strongest emission starting only, infrared rays traveling in the direction of light emission of the strongest luminescence emitted from the light emitting element, wherein Refracting portion for refracting is provided to the optical device progresses inclined side located, the inner case is permeable to be formed in the portion corresponding to the light emitting direction and the light receiving direction of the light emitting unit and the light receiving unit It has a light unit, and wherein the Rukoto provided integrally with the outer casing so that each bent portion is fitted to said transparent portion.

また、赤外線の発光部と受光部とが装着される基板を備え、前記基板は、前記発光部と前記受光部とが装着される略平坦な被装着面を有し、前記発光部と前記受光部はそれぞれ、底面が前記被装着面に装着される略平坦な装着面となるケーシングと、前記基板が収容され遮光部材で形成される内ケースと、前記内ケースが収容され透光部材からなる外ケースとを備え、前記発光部は、最も強く発光する発光方向が前記底面と垂直な方向となる発光素子を前記ケーシングに備え、前記受光部は、最も強く受光する受光方向が前記底面と垂直な方向となる受光素子を前記ケーシングに備え、前記受光素子を終点として前記最も強く受光する受光方向に進む線上にのみ、前記発光素子が位置する側から略受光素子に向けて傾斜して進行する赤外線を、前記最も強く受光する受光方向に屈折させて前記受光素子に至らせる屈折部が設けられ、前記内ケースは、前記発光部と前記受光部の発光方向と受光方向に対応する部分に穿設される透光部を有し、各屈折部が前記透光部に嵌るように前記外ケースに一体に設けられることを特徴とする。 The substrate includes a substrate on which an infrared light emitting unit and a light receiving unit are mounted, the substrate having a substantially flat mounting surface on which the light emitting unit and the light receiving unit are mounted, and the light emitting unit and the light receiving unit. Each of the parts includes a casing whose bottom surface is a substantially flat mounting surface mounted on the mounted surface, an inner case that accommodates the substrate and is formed of a light shielding member, and a light-transmitting member that accommodates the inner case. An outer case, and the light emitting unit includes a light emitting element in the casing in which a light emitting direction that emits the strongest light is perpendicular to the bottom surface, and the light receiving unit has a light receiving direction that receives the strongest light in a direction perpendicular to the bottom surface. The casing is provided with a light receiving element that has a different direction, and proceeds in an inclined manner from the side where the light emitting element is located toward the light receiving element only on a line that travels in the light receiving direction where the light receiving element is the strongest light receiving point. Infrared Refracting unit to bring the light receiving element by refracting the light receiving direction is provided to the strongest received, the inner case is formed in a portion corresponding to the light emitting direction and the light receiving direction of the light emitting unit and the light receiving unit It has a light transmitting portion, and wherein the Rukoto provided integrally with the outer casing so that each bent portion is fitted to said transparent portion.

また、赤外線の発光部と受光部とが装着される基板を備え、前記基板は、前記発光部と前記受光部とが装着される略平坦な被装着面を有し、前記発光部と前記受光部はそれぞれ、底面が前記被装着面に装着される略平坦な装着面となるケーシングと、前記基板が収容され遮光部材で形成される内ケースと、前記内ケースが収容され透光部材からなる外ケースとを備え、前記発光部は、最も強く発光する発光方向が前記底面と垂直な方向となる発光素子を前記ケーシングに備え、前記受光部は、最も強く受光する受光方向が前記底面と垂直な方向となる受光素子を前記ケーシングに備え、前記発光素子を起点として前記最も強く発光する発光方向に進む線上に、前記発光素子から発光して前記最も強く発光する発光方向に進行する赤外線を、前記受光素子が位置する側に傾斜して進行するように屈折させる屈折部が設けられ、前記受光素子を終点として前記最も強く受光する受光方向に進む線上に、前記発光素子が位置する側から略受光素子に向けて傾斜して進行する赤外線を、前記最も強く受光する受光方向に屈折させて前記受光素子に至らせる屈折部が設けられ、前記内ケースは、前記発光部と前記受光部の発光方向と受光方向に対応する部分に穿設される透光部を有し、各屈折部が前記透光部に嵌るように前記外ケースに一体に設けられることを特徴とする。 The substrate includes a substrate on which an infrared light emitting unit and a light receiving unit are mounted, the substrate having a substantially flat mounting surface on which the light emitting unit and the light receiving unit are mounted, and the light emitting unit and the light receiving unit. Each of the parts includes a casing whose bottom surface is a substantially flat mounting surface mounted on the mounted surface, an inner case that accommodates the substrate and is formed of a light shielding member, and a light-transmitting member that accommodates the inner case. An outer case, and the light emitting unit includes a light emitting element in the casing in which a light emitting direction that emits the strongest light is perpendicular to the bottom surface, and the light receiving unit has a light receiving direction that receives the strongest light in a direction perpendicular to the bottom surface. In the casing, the light receiving element having a different direction is provided on the casing, and the infrared ray that travels in the light emitting direction that emits light from the light emitting element and emits the strongest light on the line that travels in the light emitting direction that emits the strongest light from the light emitting element, Previous A refracting section is provided that refracts the light receiving element so that the light advances toward the side where the light receiving element is located, and substantially receives light from the side where the light emitting element is located on a line that travels in the light receiving direction where the light receiving element is the strongest light receiving point. There is provided a refracting part for refracting infrared rays traveling toward the element in the light receiving direction for receiving the strongest light and reaching the light receiving element, and the inner case includes light emitting directions of the light emitting part and the light receiving part. and has a light transmitting portion that is formed in the portion corresponding to the light-receiving direction, the refraction portion is characterized Rukoto provided integrally with the outer case to fit the light transmitting portion.

本発明にあっては、基板に装着される発光部の発光方向と受光部の受光方向の調節が容易に行われる。 In the present invention, the light emission direction of the light emitting unit mounted on the substrate and the light reception direction of the light receiving unit are easily adjusted.

本発明の赤外線センサの一実施形態の断面図である。It is sectional drawing of one Embodiment of the infrared sensor of this invention. 他の実施形態の断面図である。It is sectional drawing of other embodiment. 更に他の実施形態の断面図である。It is sectional drawing of other embodiment. 更に他の実施形態の断面図である。It is sectional drawing of other embodiment. 赤外線センサが設けられたスパウト部の斜視図である。It is a perspective view of the spout part provided with the infrared sensor. 従来の赤外線センサの断面図である。It is sectional drawing of the conventional infrared sensor.

以下、本発明の第一の実施形態について図１、図５に基いて説明する。 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 5.

スパウト部６は、キッチンカウンターのシンクの周辺部や、洗面化粧台のボウルの周辺部等に設けられる、筒状をしてカランの外殻をなすカバーとなるもので、シンクやボウル等の周辺部の上面が、スパウト部６が突設される被取付面となる。スパウト部６は、図５に示すように、被取付面から上方または斜め上方に向けて突出され、途中で曲げられて、下流端の開口は下方または斜め下方を向くように設置される。本実施形態では、側面視略逆Ｊ字状をしたものである。なお、スパウト部６の側面視形状は前記逆Ｊ字状に限定されず、逆Ｌ字状等であってもよい。 The spout unit 6 is a cover that is provided in the peripheral part of the sink of the kitchen counter, the peripheral part of the bowl of the vanity, etc., and forms the outer shell of the currant. The upper surface of the part becomes a mounted surface on which the spout part 6 is projected. As shown in FIG. 5, the spout portion 6 protrudes upward or obliquely upward from the surface to be attached, is bent in the middle, and the downstream end opening is installed to face downward or obliquely downward. In this embodiment, it is a substantially inverted J shape in side view. In addition, the side view shape of the spout part 6 is not limited to the inverted J shape, and may be an inverted L shape or the like.

スパウト部６は、その内部空間に湯や水が流れる管が挿通される。そして、スパウト部６に物体検知センサ１が設けられるもので、本実施形態では、側面視略逆Ｊ字状をした頂部の上面部に設けられる。スパウト部６の頂部の上面部には、開口が形成され、この開口によりスパウト部６の内外が連通される。前記開口には透光部材（後述する外ケース１４）が嵌め込まれ、水をはじめとする物質がスパウト部６外から内部に侵入するのを阻止するとともに、電磁波を自在に透過させる。物体検知センサ１は赤外線反射型センサであり、本体部となる基板１０がスパウト部６内に収容される。 The spout portion 6 is inserted with a pipe through which hot water or water flows in its internal space. And the object detection sensor 1 is provided in the spout part 6, and in this embodiment, it is provided in the upper surface part of the top part which carried out the side view substantially reverse J shape. An opening is formed in the upper surface of the top portion of the spout portion 6, and the inside and outside of the spout portion 6 communicate with each other through this opening. A light-transmitting member (an outer case 14 to be described later) is fitted in the opening to prevent substances such as water from entering the spout portion 6 from the outside and to allow the electromagnetic waves to freely pass therethrough. The object detection sensor 1 is an infrared reflection type sensor, and a substrate 10 serving as a main body is accommodated in the spout unit 6.

基板１０は、図１に示すように、赤外線の発光部２と受光部３とを備えるもので、本実施形態ではプリント基板で構成され、発光部２と受光部３とが装着される。基板１０は、発光部２と受光部３とが装着される略平坦な面からなる被装着面１１を備えている。発光部２は、底面２１が略平坦な装着面となるケーシング２０を備え、ケーシング２０に発光素子２２が設けられている。また、受光部３は、底面３１が略平坦な装着面となるケーシング３０を備え、ケーシング３０に受光素子３２が設けられている。発光部２のケーシング２０と受光部３のケーシング３０は、所定の間隔をあけて基板１０に実装される。 As shown in FIG. 1, the substrate 10 includes an infrared light emitting unit 2 and a light receiving unit 3. In the present embodiment, the substrate 10 is formed of a printed circuit board, and the light emitting unit 2 and the light receiving unit 3 are mounted. The substrate 10 includes a mounting surface 11 that is a substantially flat surface on which the light emitting unit 2 and the light receiving unit 3 are mounted. The light emitting unit 2 includes a casing 20 whose bottom surface 21 is a substantially flat mounting surface, and the light emitting element 22 is provided in the casing 20. The light receiving unit 3 includes a casing 30 having a bottom surface 31 that is a substantially flat mounting surface, and the light receiving element 32 is provided in the casing 30. The casing 20 of the light emitting unit 2 and the casing 30 of the light receiving unit 3 are mounted on the substrate 10 at a predetermined interval.

発光素子２２の発光方向は、ケーシング２０の底面２１と垂直な方向２３に最も強く発光されるように設定されているが、底面２１と垂直な方向２３を中心として幾らかの広がりを有する。また、受光素子３２の受光方向も、赤外線の強さが同じで方向が異なる場合、ケーシング３０の底面３１と垂直な方向３３に入射した時に最も強く受光されるように設定されているが、底面３１と垂直な方向３３を中心として幾らかの広がりを有する。以下、発光素子２２において最も強く発光される方向２３を「発光方向２３」といい、受光素子３２において最も強く受光させる方向３３を「受光方向３３」というものとする。 The light emitting direction of the light emitting element 22 is set so as to emit the strongest light in the direction 23 perpendicular to the bottom surface 21 of the casing 20, but has a certain extent around the direction 23 perpendicular to the bottom surface 21. The light receiving direction of the light receiving element 32 is also set so as to receive the strongest light when entering the direction 33 perpendicular to the bottom surface 31 of the casing 30 when the intensity of infrared rays is the same and the directions are different. It has some spread around a direction 33 perpendicular to 31. Hereinafter, the direction 23 in which the light emitting element 22 emits the strongest light is referred to as “light emitting direction 23”, and the direction 33 in which the light receiving element 32 receives the strongest light is referred to as “light receiving direction 33”.

発光素子２２を起点として発光方向２３に進む線２４上には、屈折部４が設けられる。この屈折部４は、発光素子２２から発光し発光方向２３に進行する赤外線を、受光素子３２が位置する側に傾斜して進行するように屈折させるものである。前記屈折する角度は、発光方向２３に進行する赤外線が、基板１０から所定の距離離れた位置７０における、発光部２と受光部３の中間線上の点７１の方に方向転換するように設定される。ここで、前記所定の距離離れた位置７０は、使用者がカラン（スパウト部６）からの吐出の開始／停止の切り替えのためにスパウト部６にかざす手のスパウト部６からの設計上の距離に基づいて決められるもので、本実施形態では１５〜３０ｍｍ程度に設計される。 The refracting section 4 is provided on a line 24 that starts in the light emitting direction 23 from the light emitting element 22. The refracting unit 4 refracts infrared light emitted from the light emitting element 22 and traveling in the light emitting direction 23 so as to travel while being inclined toward the side where the light receiving element 32 is located. The angle at which the light is refracted is set so that the infrared rays traveling in the light emitting direction 23 change direction toward a point 71 on the intermediate line between the light emitting unit 2 and the light receiving unit 3 at a position 70 away from the substrate 10 by a predetermined distance. The Here, the position 70 apart from the predetermined distance is a design distance from the spout unit 6 of the hand that the user holds over the spout unit 6 to switch the start / stop of discharge from the currant (spout unit 6). In this embodiment, it is designed to be about 15 to 30 mm.

また、受光素子３２を終点として受光方向３３に進む線３４上にも、屈折部５が設けられる。この屈折部５は、発光素子２２が位置する側から略受光素子３２に向けて傾斜して（すなわち受光方向３３から傾斜して）進行してきた赤外線を、受光方向３３に進行して受光素子３２に至るように屈折させるものである。前記屈折する角度は、前記点７１から屈折部５に進行してきた赤外線が受光方向３３に方向転換するように設定される。 Further, the refracting part 5 is also provided on a line 34 that travels in the light receiving direction 33 with the light receiving element 32 as an end point. The refracting portion 5 travels in the light receiving direction 33 by traveling infrared light that has been inclined toward the light receiving element 32 from the side where the light emitting element 22 is located (that is, inclined from the light receiving direction 33). It is refracted so as to reach. The angle at which the light is refracted is set so that the infrared rays that have traveled from the point 71 to the refracting unit 5 are turned in the light receiving direction 33.

本実施形態では、基板１０は、遮光部材で形成される内ケース１２内に収容され、基板１０に設けられた発光部２と受光部３の発光方向２３と受光方向３３とに対応する部分に、所定の大きさの開口が穿設されて透光部１３が形成されている。また、この内ケース１２は外ケース１４内に収容されるもので、外ケース１４は、スパウト部６の上記開口に嵌め込まれる上記透光部材からなり、可視光を遮光し赤外線を透過させる可視光カットフィルターとして機能するものである。そして、本実施形態では、外ケース１４の裏面の一部にプリズムとなる傾斜が設けられることで、このプリズムが屈折部４、５として外ケース１４に一体に形成されている。 In the present embodiment, the substrate 10 is accommodated in an inner case 12 formed of a light shielding member, and is provided at portions corresponding to the light emitting direction 23 and the light receiving direction 33 of the light emitting unit 2 and the light receiving unit 3 provided on the substrate 10. An opening having a predetermined size is formed to form a light transmitting portion 13. Further, the inner case 12 is accommodated in the outer case 14, and the outer case 14 is made of the above-described translucent member fitted into the opening of the spout portion 6, and is visible light that blocks visible light and transmits infrared light. It functions as a cut filter. In the present embodiment, the prism is formed integrally with the outer case 14 as the refracting portions 4 and 5 by providing a part of the back surface of the outer case 14 with an inclination that becomes a prism.

上記のように、屈折部４、５が設けられることで、発光部２と受光部３が、その発光方向２３と受光方向３３が基板１０の被装着面１１に対して垂直となるように装着されても、所定の距離離れた位置７０よりも基板１０に近い位置で反射した赤外線の受光状態が良好になる。 As described above, by providing the refracting portions 4 and 5, the light emitting portion 2 and the light receiving portion 3 are mounted such that the light emitting direction 23 and the light receiving direction 33 are perpendicular to the mounting surface 11 of the substrate 10. Even so, the light receiving state of the infrared light reflected at a position closer to the substrate 10 than the position 70 separated by a predetermined distance is improved.

すなわち、発光部２から発光方向２３に発光された赤外線は、屈折部４において、点７１の方に向けて最も強く進行する。そして、使用者が前記点７１にかざした手により、屈折部４から点７１に向けて進行してきた赤外線が反射し、その一部が屈折部５の方へ向けて進行し、屈折部５にて受光方向３３へ方向転換して、受光部３にて受光される。 That is, the infrared light emitted from the light emitting unit 2 in the light emitting direction 23 travels most strongly toward the point 71 in the refracting unit 4. The user's hand over the point 71 reflects the infrared light traveling from the refracting part 4 toward the point 71, and part of the infrared light travels toward the refracting part 5. Then, the direction is changed to the light receiving direction 33 and the light receiving unit 3 receives the light.

次に、所定の距離離れた位置７０よりも基板１０に近い位置で赤外線が反射する場合について説明する。発光部２から発光方向２３に発光された赤外線が、屈折部４において、所定の距離離れた位置７０よりも基板１０に近い位置で且つ発光部２と受光部３の中間線上の点７２の方に屈折した場合、この点７２の方に向けて進行する赤外線は発光部２から発光される最も強い赤外線ではなく、点７１に向けて進行する赤外線よりも弱い。そして、その弱くなる程度は、基板１０に近い位置である程大きくなる。しかしながら、この場合、赤外線が発光部２から受光部３に至る距離が短くなって減衰が小さくなるため、結果的に、点７２で反射し受光部３で受光される赤外線の受光強さと、点７１で反射し受光部３で受光される赤外線の受光強さは大きく違わないものとなる。 Next, the case where infrared rays are reflected at a position closer to the substrate 10 than the position 70 separated by a predetermined distance will be described. Infrared light emitted from the light emitting unit 2 in the light emitting direction 23 is closer to the substrate 10 in the refracting unit 4 than the position 70 that is a predetermined distance away, and the point 72 on the intermediate line between the light emitting unit 2 and the light receiving unit 3. When the light is refracted, the infrared ray traveling toward the point 72 is not the strongest infrared ray emitted from the light emitting unit 2 but is weaker than the infrared ray traveling toward the point 71. The degree of weakening increases as the position is closer to the substrate 10. However, in this case, since the distance from the light emitting unit 2 to the light receiving unit 3 becomes short and the attenuation becomes small in this case, as a result, the received light intensity of the infrared light reflected by the point 72 and received by the light receiving unit 3 is increased. The intensity of the received infrared light reflected by 71 and received by the light receiving unit 3 is not significantly different.

次に、所定の距離離れた位置７０よりも基板１０に遠い位置で赤外線が反射する場合について説明する。発光部２から発光方向２３に発光された赤外線が、屈折部４において、所定の距離離れた位置７０よりも基板１０に遠い位置で且つ発光部２と受光部３の中間線上の点７３の方に屈折した場合、この点７３の方に向けて進行する赤外線は発光部２から発光される最も強い赤外線ではなく、点７１に向けて進行する赤外線よりも弱い。そして、その弱くなる程度は、基板１０から遠い位置である程大きくなる。しかもこの場合、赤外線が発光部２から受光部３に至る距離が長くなって減衰が大きくなるため、点７３で反射し受光部３で受光される赤外線の受光強さは、点７１で反射し受光部３で受光される赤外線の受光強さと比べて、著しく低下する。 Next, a case where infrared rays are reflected at a position farther from the substrate 10 than the position 70 separated by a predetermined distance will be described. Infrared light emitted from the light emitting unit 2 in the light emitting direction 23 is farther from the substrate 10 in the refracting unit 4 than the position 70 that is a predetermined distance away, and the point 73 on the intermediate line between the light emitting unit 2 and the light receiving unit 3. When the light is refracted, the infrared ray traveling toward the point 73 is not the strongest infrared ray emitted from the light emitting unit 2 but is weaker than the infrared ray traveling toward the point 71. The degree of weakening increases as the position is farther from the substrate 10. In addition, in this case, since the distance from the light emitting unit 2 to the light receiving unit 3 becomes longer and the attenuation increases, the intensity of the infrared light reflected by the point 73 and received by the light receiving unit 3 is reflected by the point 71. This is significantly lower than the infrared light receiving intensity received by the light receiving unit 3.

このようにして、上記位置７０よりも近い位置にかざされた手により反射した赤外線は、受光部３で良好に受光されるのに対し、上記位置７０よりも遠い位置にかざされた手により反射した赤外線は、受光部３での受光状態が著しく低下するため、吐出の開始／停止の切り替えのためにかざされる手の有効範囲が明確になる。 In this way, the infrared light reflected by the hand held close to the position 70 is well received by the light receiving unit 3, but reflected by the hand held farther than the position 70. Since the received light in the light receiving unit 3 is remarkably lowered, the effective range of the hand held for switching the start / stop of the discharge becomes clear.

そして、上記構成により、発光部２と受光部３とが基板１０に装着されるにあたり、略平坦な装着面となる底面２１が略平坦な被装着面１１に装着されるだけでよい。このため、従来のように発光部２と受光部３のリード線の曲げ角度が調節される必要がなく、発光部２と受光部３の基板１０への装着が容易となるものである。また、従来のように発光部２と受光部３のリード線が曲げられることにより、発光部２と受光部３とそのリード線が基板１０上の大きな容積を占めることもない。 With the above configuration, when the light emitting unit 2 and the light receiving unit 3 are mounted on the substrate 10, it is only necessary to mount the bottom surface 21, which is a substantially flat mounting surface, to the substantially flat mounting surface 11. Therefore, it is not necessary to adjust the bending angle of the lead wires of the light emitting unit 2 and the light receiving unit 3 as in the prior art, and the light emitting unit 2 and the light receiving unit 3 can be easily mounted on the substrate 10. In addition, since the lead wires of the light emitting unit 2 and the light receiving unit 3 are bent as in the prior art, the light emitting unit 2, the light receiving unit 3, and the lead wires do not occupy a large volume on the substrate 10.

次に、他の実施形態について図２に基づいて説明する。図１に示す上記実施形態と同じ構成については同符号を付して説明を省略し、主に異なる構成について説明する。 Next, another embodiment will be described with reference to FIG. The same components as those in the above embodiment shown in FIG. 1 are denoted by the same reference numerals, description thereof is omitted, and different components are mainly described.

図１に示す上記実施形態においては、屈折部４、５は可視光カットフィルターとして機能する外ケース１４に形成されるプリズムにて構成され、外ケース１４に一体に形成されていた。これに対し、本実施形態では、外ケース１４（および内ケース１２）とは別体のレンズからなるもので、レンズの形状は特に限定されない。このようにすることで、外ケース１４にプリズムが形成される必要がなく、外ケース１４の設計上の自由度が増す。 In the above-described embodiment shown in FIG. 1, the refracting portions 4 and 5 are configured by a prism formed on the outer case 14 that functions as a visible light cut filter, and are formed integrally with the outer case 14. On the other hand, in this embodiment, it consists of a lens separate from the outer case 14 (and the inner case 12), and the shape of the lens is not particularly limited. By doing in this way, it is not necessary to form a prism in the outer case 14, and the freedom degree in the design of the outer case 14 increases.

次に、更に他の実施形態について図３に基づいて説明する。図２に示す上記実施形態と同じ構成については同符号を付して説明を省略し、主に異なる構成について説明する。 Next, still another embodiment will be described with reference to FIG. The same components as those in the above-described embodiment shown in FIG. 2 are denoted by the same reference numerals, description thereof is omitted, and different components are mainly described.

図２に示す上記実施形態においては、発光部２と受光部３の両方に対応するように、外ケース１４とは別体のレンズからなる屈折部４、５が設けられていた。これに対し、本実施形態では、発光部２にのみ屈折部４が設けられ、受光部３には屈折部５が設けられないものである。この場合、受光部３に屈折部５が設けられる場合と比べて若干感度が低下するものの、受光部３に屈折部５が設けられる場合と比べて屈折部４の屈折角度を大きくしておけば、吐出の開始／停止の切り替えのためにかざされる手の有効範囲を、図１に示す実施形態とほぼ同じにすることができる。またこの場合、受光部３に屈折部５が設けられる必要がなく、製造コストの低減化が図られる。また、本実施形態においても、屈折部４が可視光カットフィルターとして機能する外ケース１４に形成されるプリズムにて構成されてもよい。 In the embodiment shown in FIG. 2, the refracting portions 4 and 5 made of a lens separate from the outer case 14 are provided so as to correspond to both the light emitting portion 2 and the light receiving portion 3. On the other hand, in this embodiment, the refracting part 4 is provided only in the light emitting part 2, and the refracting part 5 is not provided in the light receiving part 3. In this case, although the sensitivity is slightly lowered as compared with the case where the light receiving unit 3 is provided with the refracting part 5, if the refraction angle of the refracting part 4 is increased as compared with the case where the light receiving part 3 is provided with the refracting part 5. The effective range of the hand held for switching the start / stop of discharge can be made substantially the same as that of the embodiment shown in FIG. Further, in this case, it is not necessary to provide the refracting portion 5 in the light receiving portion 3, and the manufacturing cost can be reduced. Also in this embodiment, the refracting portion 4 may be configured by a prism formed on the outer case 14 that functions as a visible light cut filter.

次に、更に他の実施形態について図４に基づいて説明する。図２に示す上記実施形態と同じ構成については同符号を付して説明を省略し、主に異なる構成について説明する。 Next, still another embodiment will be described with reference to FIG. The same components as those in the above-described embodiment shown in FIG. 2 are denoted by the same reference numerals, description thereof is omitted, and different components are mainly described.

図２に示す上記実施形態においては、発光部２と受光部３の両方に対応するように、外ケース１４とは別体のレンズからなる屈折部４、５が設けられていた。これに対し、本実施形態では、受光部３にのみ屈折部５が設けられ、発光部２には屈折部４が設けられないものである。この場合、発光部２に屈折部４が設けられる場合と比べて若干感度が低下するものの、発光部２に屈折部４が設けられる場合と比べて屈折部５の屈折角度を大きくしておけば、吐出の開始／停止の切り替えのためにかざされる手の有効範囲を、図１に示す実施形態とほぼ同じにすることができる。またこの場合も、発光部２に屈折部４が設けられる必要がなく、製造コストの低減化が図られる。また、本実施形態においても、屈折部５が可視光カットフィルターとして機能する外ケース１４に形成されるプリズムにて構成されてもよい。 In the embodiment shown in FIG. 2, the refracting portions 4 and 5 made of a lens separate from the outer case 14 are provided so as to correspond to both the light emitting portion 2 and the light receiving portion 3. On the other hand, in the present embodiment, the refracting part 5 is provided only in the light receiving part 3, and the refracting part 4 is not provided in the light emitting part 2. In this case, although the sensitivity is slightly lowered as compared with the case where the light-emitting portion 2 is provided with the refracting portion 4, the refraction angle of the refracting portion 5 is increased as compared with the case where the light-emitting portion 2 is provided with the refracting portion 4. The effective range of the hand held for switching the start / stop of discharge can be made substantially the same as that of the embodiment shown in FIG. Also in this case, it is not necessary to provide the refracting part 4 in the light emitting part 2, and the manufacturing cost can be reduced. Also in this embodiment, the refracting portion 5 may be configured by a prism formed on the outer case 14 that functions as a visible light cut filter.

１物体検知センサ
１０基板
１１被装着面
１２内ケース
１３透光部
１４外ケース
２発光部
２０ケーシング
２１底面
２２発光素子
２３発光方向
３受光部
３０ケーシング
３１底面
３２受光素子
３３受光方向
４屈折部
５屈折部
６スパウト部 DESCRIPTION OF SYMBOLS 1 Object detection sensor 10 Board | substrate 11 Mounted surface 12 Inner case 13 Translucent part 14 Outer case 2 Light emitting part 20 Casing 21 Bottom face 22 Light emitting element 23 Light emitting direction 3 Light receiving part 30 Casing 31 Bottom face 32 Light receiving element 33 Light receiving direction 4 Refraction part 5 Refraction part 6 Spout part

Claims

An infrared light emitting unit and a light receiving unit are mounted on the substrate, the substrate having a substantially flat mounting surface on which the light emitting unit and the light receiving unit are mounted, and the light emitting unit and the light receiving unit are A casing whose bottom surface is a substantially flat mounting surface to be mounted on the mounting surface, an inner case in which the substrate is accommodated and formed of a light shielding member, and an outer case in which the inner case is accommodated and made of a translucent member The light emitting unit includes a light emitting element in which the light emitting direction in which light is emitted most strongly is a direction perpendicular to the bottom surface, and the light receiving unit is in a direction in which the light receiving direction in which light is most strongly received is perpendicular to the bottom surface. become a light receiving element to said casing, said light emitting element on the line proceed to the light emitting direction of the strongest emission starting only, infrared rays traveling in the direction of light emission of the strongest luminescence emitted from the light emitting element, wherein Refracting portion for refracting is provided to the optical device progresses inclined side located, the inner case is permeable to be formed in the portion corresponding to the light emitting direction and the light receiving direction of the light emitting unit and the light receiving unit It has a light unit, an infrared sensor, wherein Rukoto each bent portion is provided integrally with the outer case to fit the light transmitting portion.

An infrared light emitting unit and a light receiving unit are mounted on the substrate, the substrate having a substantially flat mounting surface on which the light emitting unit and the light receiving unit are mounted, and the light emitting unit and the light receiving unit are A casing whose bottom surface is a substantially flat mounting surface to be mounted on the mounting surface, an inner case in which the substrate is accommodated and formed of a light shielding member, and an outer case in which the inner case is accommodated and made of a translucent member The light emitting unit includes a light emitting element in which the light emitting direction in which light is emitted most strongly is a direction perpendicular to the bottom surface, and the light receiving unit is in a direction in which the light receiving direction in which light is most strongly received is perpendicular to the bottom surface. The light receiving element is provided on the casing, and the infrared light traveling at an inclination toward the light receiving element from the side where the light emitting element is located is only on the line that travels in the light receiving direction where the light receiving element is the strongest light with the light receiving element as an end point. The above Refracting portion to bring said light receiving element is provided by refracting the light receiving direction for receiving even stronger, the inner case is permeable to be formed in the portion corresponding to the light emitting direction and the light receiving direction of the light emitting unit and the light receiving unit It has a light unit, an infrared sensor, wherein Rukoto each bent portion is provided integrally with the outer case to fit the light transmitting portion.

An infrared light emitting unit and a light receiving unit are mounted on the substrate, the substrate having a substantially flat mounting surface on which the light emitting unit and the light receiving unit are mounted, and the light emitting unit and the light receiving unit are A casing whose bottom surface is a substantially flat mounting surface to be mounted on the mounting surface, an inner case in which the substrate is accommodated and formed of a light shielding member, and an outer case in which the inner case is accommodated and made of a translucent member The light emitting unit includes a light emitting element in which the light emitting direction in which light is emitted most strongly is a direction perpendicular to the bottom surface, and the light receiving unit is in a direction in which the light receiving direction in which light is most strongly received is perpendicular to the bottom surface. The casing is provided with a light receiving element to be used, and infrared light that travels in the light emitting direction that emits light from the light emitting element and that emits the strongest light is emitted on the line that travels in the light emitting direction that emits the strongest light starting from the light emitting element. A refracting portion is provided that refracts so as to travel in an inclined manner toward the side where the child is located, and is substantially light-receiving element from the side where the light-emitting element is located on the line that proceeds in the light-receiving direction where the light-receiving element is the most strongly received light. A refracting portion for refracting infrared rays traveling toward the light receiving direction to receive the strongest light and reaching the light receiving element, and the inner case includes a light emitting portion and a light emitting direction of the light receiving portion. It has a light transmitting portion that is formed in the portion corresponding to the light-receiving direction, an infrared sensor, wherein Rukoto each bent portion is provided integrally with the outer case to fit the light transmitting portion.