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JP2004116148A - Toilet bowl flushing device - Google Patents

Toilet bowl flushing device Download PDF

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Publication number
JP2004116148A
JP2004116148A JP2002281487A JP2002281487A JP2004116148A JP 2004116148 A JP2004116148 A JP 2004116148A JP 2002281487 A JP2002281487 A JP 2002281487A JP 2002281487 A JP2002281487 A JP 2002281487A JP 2004116148 A JP2004116148 A JP 2004116148A
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JP
Japan
Prior art keywords
sensor
light
sensor means
light emitting
toilet
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.)
Pending
Application number
JP2002281487A
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Japanese (ja)
Inventor
Yoshiyuki Kaneko
金子 義行
Takahiro Kanomatsu
叶松 隆博
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Toto Ltd
Original Assignee
Toto Ltd
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Filing date
Publication date
Application filed by Toto Ltd filed Critical Toto Ltd
Priority to JP2002281487A priority Critical patent/JP2004116148A/en
Publication of JP2004116148A publication Critical patent/JP2004116148A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a toilet bowl flushing device capable of smoothly controlling an automatic flush, a manual flush and a function of the stop (cleaning mode) of the automatic flush by means of two sets of sensors. <P>SOLUTION: A first sensor means and a second sensor means project infrared light to a detection body by means of flood light projectors, reflected light from the detection body is received by a light receiving means to make a sensory decision in accordance with quantity of light to be received as active type infrared-ray sensors, the flood light projector of the first sensor means has a different direction from the flood light projector of the second sensor means in their flood light projection spheres, and both of them are crossed to install so as to partially overlap. A water supply controlling means includes an automatic flushing function to supply water when the first sensor means becomes a non-sensible state after it has continued a sensible state more than predetermined time, a manual flushing function to supply water when both first and second sensors simultaneously become a sensible state and a function for stopping the automatic flush when the first sensor means becomes a non-sensible state and when the second sensor means becomes a sensible state. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、人体検出センサ及び手かざしセンサを有する便器自動洗浄装置に関する。
【0002】
【従来の技術】
便器の使用者をセンサによって検出し、便器の洗浄を自動で行う便器自動洗浄装置は広く普及している。ここで使用されるセンサは、人体に向けて赤外光を放射し、その反射量で感知、非感知を判断する、赤外線センサが一般的である。
男性用小便器の自動洗浄の場合は、使用者が立ち去ると便器を洗浄するだけのものが多いが、大便器の場合はいくつかの洗浄パターンがある。
【0003】
大便器の場合、「使用前、使用中に洗浄したい」「便器から離れる前に洗浄したい」という様に、使用者の意志で任意に洗浄、すなわち手動洗浄したい場合がある。更に、大便器の場合は大小兼用であるため、大便に応じた多めの水量の洗浄(大洗浄)と、小便に応じた少ない水量の洗浄(小洗浄)に切り替えできた方が節水となって望ましい。また、男性用小便器でも、列車内のトイレの様に非常に狭い個室となっている場合は、使用者の意志で洗浄する機能もあった方が望ましい。
【0004】
そして、これらの操作は衛生面から非接触が望まれる場合が多く、自動洗浄と同様に、手動洗浄も赤外線センサによって操作される。手動洗浄の赤外線センサに手をかざすと、直ちに便器を洗浄する仕様である。
この手動洗浄を検出するセンサと、自動洗浄のために人体を検出するセンサを共用する考案がある(特許文献1参照)。
【0005】
また、便器の掃除をする際に自動洗浄機能を一時的に停止したいという要望がある。掃除担当者が簡単に設定できる方法が良いが、使用者が誤って自動洗浄機能を停止させると不都合が生じるため、これを防止する考案がなされている(特許文献2参照)。
【0006】
この考案では、人体センサが感知していない状態で、人体センサとは異なる方向に感知領域をもつ第2のセンサが感知すると自動洗浄機能を停止している。この考案を大便器の洗浄装置に応用すると図11のようになる。図11において人体センサ及び第2のセンサはセンサケース22に収められ、固定枠23で壁に固定されている。人体センサ(第1のセンサ)は水平より下向きに、第2のセンサは上向きに設置されており、人体センサに感知しないように便器からよけた状態で、第2のセンサの上の方に手をかざすことで自動洗浄機能を停止する事が出来る。
【0007】
【特許文献1】特開2000−273931号
【特許文献2】特願2001−288365号(19頁、図18)
【0008】
【発明が解決しようとする課題】
【0009】
以上の様に、便器洗浄には多彩な要求があり、これらはいずれもセンサによって非接触で操作できることが理想である。特許文献2の技術に特許文献1の技術を組み合わせると、機能的には、自動洗浄、手動洗浄、自動洗浄の禁止(掃除モード)の動作モードが実現できるが、センサの感知性能上、使い勝手が良くないという問題がある。
【0010】
まず特許文献1の、人体を検出するセンサと手を検出するセンサを共用する方法では、センサに対して手を極めて近くにしたとき、センサ出力が低下する場合がある。人体センサは、遠くにある人体を検出するため、感度を高くしなければならない。赤外線センサは、放射した赤外光の反射量で判断するが、センサの感度を高くすると、人体だけでなくセンサの表面の反射も影響する。図12のように、赤外光の投光素子5と受光素子6を近くに置くと、センサケース22の表面の汚れ等で反射が発生し、感度を高くしている場合は、この表面の反射だけで人体があると誤感知してしまう。
【0011】
そこで、遠距離の人体を検出するために感度を高くしてもセンサの表面での反射が影響しないようにするには、投光素子5と受光素子6の距離を離せば良い。これを図13に示す。その結果、センサの出力の距離特性は図14のように、距離が近づけば出力は増加するが、極めて近距離では逆に低下する傾向となる。よって、センサケース22の表面で反射した赤外光は受光素子6に入りにくくなる。しかし、同様に極めて近い距離では、手による反射量も低下する。よって、特許文献1のように一つのセンサの反射の大小で人体と手を判別する方法では、図14の▲2▼の領域で手を感知できるが、▲1▼のように手を近づけ過ぎると手を感知しないという状態になる恐れがある。
【0012】
なお、手だけを検出するセンサでは、手の反射量が大きいため感度は低目でよく、人体を検出するセンサのように投受光素子の間隔を広げる必要はない。よって、図15のような距離特性となり、手がセンサに完全に密着さえしなければ十分に手を検出できる。
【0013】
次に、特許文献2の構成では、図16のように人体と手を検出する2つのセンサの赤外光の放射ビーム(投光素子5及び受光素子6)が上下に分かれるため、センサ正面に手をかざすと、どちらのセンサにも感知できない場合がある。本来、センサの正面は感知し易いと思われるが、そのセンサ正面が最も感知し難い点が問題である。
【0014】
本発明は、上記課題を解決するためになされたもので、2組のセンサによって、自動洗浄、手動洗浄、自動洗浄の停止(掃除モード)の機能を、良好に操作できる便器洗浄装置を提供することにある。
【0015】
【課題を解決するための手段】
上記目的を達成するために請求項1は、便器の使用者を検出する第1のセンサ手段と、人体の一部を検出する第2のセンサ手段と、前記第1および第2のセンサ手段の出力に基づいて便器に流す洗浄水の給水制御を行う給水制御手段とを備えた便器洗浄装置において、前記第1のセンサ手段及び前記第2のセンサ手段は、検出体に向けて投光手段より赤外光を投光し、検出体からの反射光を受光手段で受光して、該受光量に応じて感知判断を行うアクティブ型赤外線センサであり、前記第1のセンサ手段の投光手段と前記第2のセンサ手段の投光手段の投光領域は、方向が異なり、かつ、一部が重複するように交差して設置され、前記給水制御手段は、前記第1のセンサ手段が所定時間以上感知状態が継続した後に非感知状態になると給水を行う自動洗浄機能と、前記第1のセンサと前記第2のセンサが同時に感知状態になると給水を行う手動洗浄機能と、前記第1のセンサ手段が非感知状態で前記第2のセンサ手段が感知状態となると、前記自動洗浄機能を停止する機能を備えたので、2組のセンサで自動洗浄、手動洗浄、自動洗浄停止の3つの洗浄モードを操作でき、それぞれの操作性も良好なものとなる。
【0016】
請求項2は、請求項1の便器洗浄装置において、前記第1のセンサ手段の投光領域は使用者に対して斜め下方向、前記第2のセンサ手段の投光領域は使用者に対して斜め上方向に設定され、前記第1のセンサ手段の投光手段は前記第2のセンサ手段の投光手段よりも上に配置したので、センサに手をかざす場合に、センサに対する手の上下の位置関係で機能を分けることができ、操作を覚えやすい。
【0017】
請求項3は、請求項1乃至2の便器洗浄装置において、前記第1のセンサ手段の投光手段と、前記第2のセンサ手段の受光手段を組み合わせた第3のセンサ手段と、前記第2のセンサ手段のと投光手段と、前記第1のセンサ手段の受光手段を組み合わせた第4のセンサ手段とを備え、第3のセンサ手段または第4のセンサ手段が感知状態となると、手動洗浄機能を作動するようにしたので、新たなセンサ素子を追加することなく、センサに手を密着するような操作でも良好に感知できる。
【0018】
請求項4は、請求項3の便器洗浄装置において、前記第3のセンサ手段が感知状態となった場合の洗浄時間と、前記第4のセンサが感知状態となった場合の洗浄時間が異なるようにしたので、新たなセンサ素子を追加することなく、大小洗浄の切替のような付加機能を実現できる。
【0019】
【発明の実施の形態】
本発明を図に示す実施形態に基づいて詳細に説明する。
図1は本発明の第1の実施例を説明するセンサ部分の構成図、図2は回路図である。
【0020】
図2において、1は水栓装置を制御する制御回路であり、マイコンを内蔵している。2は電源となる電池、4は水栓装置の水路を開閉する電磁弁(図不示)のソレノイドであり、3はソレノイド4を通電するソレノイド通電回路である。
【0021】
5および6は使用者を検出するセンサ1を構成する。5は、赤外投光ダイオードと定電流駆動回路から成るセンサの投光部であり、制御回路1によって駆動され、所定の出力の赤外光を、便器の使用者に向かってパルス投光する。
6はフォトダイオードと電流―電圧変換回路から成るセンサの受光部であり、便器の使用者からの赤外線の反射出力を制御回路1に出力する。
同様に、投光部9と受光部10は手を検出するセンサ2を構成する。図1のように7はセンサの感知状態を表示するLEDであり、センサの感知中に点灯する。
【0022】
これらのセンサ及び表示部の素子は図1のように配置されている。図1の各素子は図2と同じ番号としている。21は投受光素子ホルダ、22はセンサケースである。センサ1の投受光領域は水平より下向き、センサ2の投受光領域は水平より上向きになっている。更に、上向きのセンサ2の投光素子9と受光素子10は下側に、下向きのセンサ1の投光素子5と受光素子6は上側に配置されている。
【0023】
実施例1の動作を図3のフローチャートを用いて説明する。
ステップ1(以下S001)よりスタートする。S002でセンサ1の駆動を行う。この時、制御回路1は、投光部5をパルス駆動し、そのタイミングに同期して受光部6の出力レベルを読み込む。S003で受光部6の出力が人体感知の閾値以上かどうかをチェックし、閾値より大きい場合は人体感知と、小さい場合は人体非感知と判定する。
【0024】
非感知の場合、S006で表示LED7を消灯し、S007で感知時間が10秒以上かどうかを判定し、同時に感知時間カウントもリセットする。感知時間が10秒以上の場合、便器の使用があったと判断し、S008でソレノイド通電回路3を駆動して便器洗浄(自動洗浄)を行いS002に戻る。
【0025】
S007で10秒未満であった場合、S009に進む。これは、使用者が継続していない場合や、便器の前を人が横切り、その間の感知時間が数秒であった場合も便器の使用はなかったとしてS009に進む。S009で制御回路1は、投光部9をパルス駆動し、そのタイミングに同期して受光部10の出力レベルを読み込む。S010で受光部10の出力が閾値以上かどうかをチェックし、閾値より大きい場合は掃除係の手の感知と判定する。なお、センサ1で人体の感知と判定する閾値やセンサ2で手の感知と判断する閾値等は、センサを構成する投受光素子や回路の特性に依存するので、制御回路1に設定または調整すれば良く、同一である必要はない。
【0026】
S010で手の検出がされない場合、S002に戻る。S010で手が検出されると、すなわちセンサ1で人体感知がない状態でセンサ2が手を検出すると、S011からS012で、センサ2を駆動して手が離されるのを待ち、S013で10分が経過するか、S014からS015で再度、手が検出されるのを待つ。いずれかの条件が成立するとS002に戻る。このS013からS015のループが自動洗浄機能を禁止する掃除モードを形成する。
【0027】
S003で人体感知と判断した場合、更にS004でセンサ1の出力が人体の感知レベルよりも大きい、手の感知レベルに達しているかチェックする。S004で手の感知レベルに達している場合は、使用者が直ちに便器洗浄を行いたいという意志があるものとしてS008に進み、便器洗浄(手動洗浄)を行う。
【0028】
S004でセンサ1の出力が手の感知レベルに達していない場合は、S016でセンサ2の駆動を行う。S017でセンサ2が手を感知しているかチェックする。S017で手を感知した場合はS008に進み、便器洗浄(手動洗浄)を行う。S017で手を感知していない場合、S018で人体感知を示す表示LED7を点灯し、S019で感知時間のカウントを行い、S002へ戻ってループする。
【0029】
本実施例による手動洗浄の動作を図14を用いて説明する。
図14において、手とセンサの距離が▲2▼の領域にある場合、図3のS004で手の感知と判断され、S008の便器洗浄に進む。これは従来と同様の動作である。図14において、手とセンサの距離が更に近く▲1▼の領域にある場合、図3のS004で手の感知と判断されないが、S017でセンサ2が手の感知を判断し、S008の便器洗浄に進む。すなわち、センサ1及びセンサ2が同時に感知することで、センサの前面に手がかざされたと判断し、手動洗浄を行う。よって、図14の▲1▼の領域でも▲2▼の領域でも手動洗浄ができるため、使用者にとって使い勝手が良い。
【0030】
図4は本発明の第2の実施例を説明するセンサ部分の外観図、図5は回路図である。但し、図5の構成要素は図2と同じであり、図2に追加となるセンサ3、センサ4の組み合わせを示している。制御回路1は、投光部5をパルス駆動し、そのタイミングに同期して受光部10の出力レベルを読み込むことで、センサ3を機能させる。同様に、制御回路1は、投光部9をパルス駆動し、そのタイミングに同期して受光部6の出力レベルを読み込むことで、センサ4を機能させる。
【0031】
図6はセンサ3(センサ4も同様)の、センサ表面に密着するような近距離での検出状態を示す図である。また、図7はセンサ3(センサ4も同様)の出力の距離特性である。
【0032】
センサ3は、図6のように、投受光領域が上向き、下向きで交差する。よって、センサに密着した場合でも反射を検出することができるが、距離が遠くなると、投受光の領域の重なりがなくなるため、距離が離れるに従って急激に出力は低下する。
【0033】
図8に第2の実施例の動作フローチャートを示す。
S001からS019の動作は図3と同じである。S007の判断で自動洗浄が行われる場合、S004またはS017の判断で手動洗浄が行われる場合、S010で掃除モードに入る以外は、S020を通る。S020では、投光部5を駆動して受光部10の出力を検出し、センサ3を駆動する。S021でセンサ3が手を感知したかどうかをチェックし、感知している場合はS008に進んで便器洗浄(手動洗浄)を行う。
S021で手を感知しない場合、S022で投光部9を駆動して受光部6の出力を検出し、センサ4を駆動する。S023でセンサ4が手を感知したかどうかをチェックし、感知している場合はS008に進んで便器洗浄(手動洗浄)を行う。手を感知していない場合はS002に戻る。
【0034】
以上のように、実施例1の動作に加えて、センサに密着するように手をかざした場合であっても、センサ3及びセンサ4の駆動により、より確実に検出することができる。
【0035】
図9は第3の実施例を示すセンサの構成図である。
センサ表面に、大便用の洗浄を示す「大」をセンサ3の投受光間に、小便用の洗浄を示す「小」の字をセンサ4の投受光間に表示している。
実施例3の動作を図10のフローチャートを用いて説明する。図10は図7に対して、S020以降の処理が異なる。
まず、S024の便器洗浄の小洗浄というステップを設ける。これは小便用に少なめの洗浄を行うステップであり、S008に比較して短時間の洗浄を行う。S024が小洗浄であるため、S008の便器洗浄は、洗浄量の変化はないが大洗浄とする。
図10において、S021でセンサ3が手を感知した場合、実施例2と同じくS008の大洗浄を行う。S023でセンサ4が手を感知した場合、S024の小洗浄のステップに進む。
【0036】
図10の動作は、センサ4の感知時以外は図8と同じである。図9のセンサ4が感知する部分には「小」の文字が表示されており、使用者が意図的に小洗浄を選んでセンサケースに接触する程に操作した場合に限り小洗浄を行う。他の洗浄は、安全側の判断で大洗浄を行う。
【0037】
【発明の効果】
以上説明したように、上向きに感知領域を持つセンサをセンサケース下部に、下向きに感知領域を持つセンサをセンサケース上部に配置し、その組み合わせで判断することにより、自動洗浄、手動洗浄、自動洗浄停止の3つの洗浄モードが非接触で操作可能となる。
また、上向きに感知領域を持つセンサをセンサケース下部に、下向きに感知領域を持つセンサをセンサケース上部に配置することにより、センサ正面に手をかざした時の検出性能が向上し、より簡単に操作できる。
【0038】
また、上向きの投光素子と下向きの受光素子、または下向きの投光素子と上向きの受光素子を組み合わせてセンサとして機能させることにより、センサケースに接触する程に手を密着させた場合でも、手の検出が可能となる。
また、投受光素子の組み合わせに応じて機能を振り分けることにより、センサ素子を追加することなく、更に操作内容を増やすことができる。
【0039】
なお、実施例では2つのセンサを上下に配置したが、トイレのレイアウト次第では前後、左右の位置関係にしても良い。また、実施例1の場合は、受光部6と受光部10を共用することも可能である。
【0040】
【図面の簡単な説明】
【図1】本発明の第1の実施例に係るセンサ部の構成を示す外観図である。
【図2】本発明の第1の実施例に係るセンサ部の回路図である。
【図3】本発明の第1の実施例に係るセンサ部の動作を表すフローチャートである。
【図4】本発明の第2の実施例に係るセンサ部の構成を示す外観図である。
【図5】本発明の第2乃至第3の実施例に係るセンサ部の回路図である。
【図6】本発明の第2乃至第3の実施例に係るセンサ部の密着状態の感知を示す断面図である。
【図7】本発明の第2乃至第3の実施例に係るセンサ3及び4の距離 特性である。
【図8】本発明の第2の実施例に係るセンサ部の動作を表すフローチャートである。
【図9】本発明の第3の実施例に係るセンサ部の構成を示す外観図である。
【図10】本発明の第3の実施例に係るセンサ部の動作を表すフローチャートである。
【図11】従来の大便器の自動洗浄を停止する動作を表す図である。
【図12】投受光素子の間隔が狭いセンサの感知状態を示す図である。
【図13】投受光素子の間隔が広いセンサの感知状態を示す図である。
【図14】投受光素子の間隔が広いセンサの距離特性である。
【図15】投受光素子の間隔が狭いセンサの距離特性である。
【図16】従来のセンサの正面に手をかざした時の断面図である。
【符号の説明】
1…マイコン、2…電池、3…ソレノイド通電回路、
4…ソレノイド、5…投光素子(下向き)、6…受光素子(下向き)
7…表示LED、9…投光素子(上向き)、10…受光素子(上向き)
21…投受光素子ホルダ、22…センサケース、23…固定枠
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an automatic toilet flushing device having a human body detection sensor and a hand sensor.
[0002]
[Prior art]
2. Description of the Related Art Toilet automatic cleaning devices that detect a user of a toilet with a sensor and automatically wash the toilet are widely used. The sensor used here is generally an infrared sensor that emits infrared light toward the human body and determines whether to sense or not based on the amount of reflection.
In the case of automatic flushing of urinals for men, many simply wash the toilet bowl when the user leaves, but there are several flushing patterns for toilets.
[0003]
In the case of a toilet, there is a case where the user desires to perform arbitrary cleaning, that is, manual cleaning, such as "want to wash before use or during use" or "want to wash before leaving the toilet". Furthermore, in the case of a toilet bowl, since it is used for both large and small, the one that can switch between washing with a large amount of water according to the stool (large washing) and washing with a small amount of water according to the urine (small washing) saves water. desirable. Also, in the case of a urinal for men, if the private room is very narrow like a toilet in a train, it is desirable that the urinal has a function of washing at the will of the user.
[0004]
In these operations, non-contact is often desired from a sanitary point of view, and manual cleaning is also operated by an infrared sensor similarly to automatic cleaning. It is a specification that flushes the toilet immediately when the hand is held over the infrared sensor for manual cleaning.
There is a device in which a sensor for detecting this manual cleaning and a sensor for detecting a human body for automatic cleaning are shared (see Patent Document 1).
[0005]
Further, there is a demand to temporarily stop the automatic cleaning function when cleaning the toilet. Although a method in which the person in charge of cleaning can easily make the setting is good, a problem arises if the user stops the automatic cleaning function by mistake, and a device for preventing this has been devised (see Patent Document 2).
[0006]
In this invention, the automatic cleaning function is stopped when a second sensor having a sensing area in a direction different from the direction of the human body sensor senses while the human body sensor is not sensing. When this invention is applied to a toilet flushing device, it becomes as shown in FIG. In FIG. 11, the human body sensor and the second sensor are housed in a sensor case 22 and fixed to a wall by a fixing frame 23. The human body sensor (first sensor) is installed downward from the horizontal, and the second sensor is installed upward. When the human body sensor is kept away from the toilet so as not to detect the human body sensor, a hand is placed on the upper side of the second sensor. The automatic cleaning function can be stopped by holding it up.
[0007]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2000-273931 [Patent Document 2] Japanese Patent Application No. 2001-288365 (p. 19, FIG. 18)
[0008]
[Problems to be solved by the invention]
[0009]
As described above, there are various demands for toilet flushing, and it is ideal that all of them can be operated in a non-contact manner by a sensor. When the technology of Patent Document 2 is combined with the technology of Patent Document 2, operation modes of automatic cleaning, manual cleaning, and prohibition of automatic cleaning (cleaning mode) can be realized. However, in terms of sensor performance, usability is increased. There is a problem that it is not good.
[0010]
First, in the method of sharing a sensor for detecting a human body and a sensor for detecting a hand disclosed in Patent Literature 1, when the hand is extremely close to the sensor, the sensor output may decrease. The human body sensor must have high sensitivity to detect a distant human body. The infrared sensor determines the amount of reflection of the emitted infrared light. However, if the sensitivity of the sensor is increased, not only the human body but also the reflection of the surface of the sensor is affected. As shown in FIG. 12, when the light emitting element 5 and the light receiving element 6 for infrared light are placed close to each other, reflection occurs due to dirt on the surface of the sensor case 22. It is erroneously detected that there is a human body only by reflection.
[0011]
In order to prevent the reflection on the sensor surface from affecting even if the sensitivity is increased for detecting a human body at a long distance, the distance between the light projecting element 5 and the light receiving element 6 may be increased. This is shown in FIG. As a result, as shown in FIG. 14, the output characteristic of the sensor output increases as the distance decreases, but tends to decrease at an extremely short distance. Therefore, the infrared light reflected on the surface of the sensor case 22 does not easily enter the light receiving element 6. However, at very short distances, the amount of reflection by the hand also decreases. Therefore, in the method of discriminating the hand from the human body based on the magnitude of the reflection of one sensor as in Patent Document 1, the hand can be detected in the area (2) in FIG. 14, but the hand is too close as in (1). May not be able to detect the hand.
[0012]
Note that a sensor that detects only the hand has a low sensitivity because the amount of reflection of the hand is large, and it is not necessary to increase the interval between the light emitting and receiving elements, unlike a sensor that detects a human body. Therefore, the distance characteristics as shown in FIG. 15 are obtained, and the hand can be sufficiently detected if the hand does not completely adhere to the sensor.
[0013]
Next, in the configuration of Patent Document 2, as shown in FIG. 16, the infrared radiation beams (the light projecting element 5 and the light receiving element 6) of the two sensors for detecting the human body and the hand are separated into upper and lower parts. If you hold your hand, you may not be able to detect with either sensor. Originally, the front of the sensor seems to be easy to detect, but the problem is that the front of the sensor is most difficult to detect.
[0014]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and provides a toilet flushing device capable of satisfactorily operating the functions of automatic cleaning, manual cleaning, and automatic cleaning stop (cleaning mode) by two sets of sensors. It is in.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 is a first sensor means for detecting a user of a toilet bowl, a second sensor means for detecting a part of a human body, and the first and second sensor means. And a water supply control unit for controlling water supply of the flush water flowing to the toilet based on the output, wherein the first sensor unit and the second sensor unit are arranged such that the first sensor unit and the second sensor unit emit light toward a detection body. An active infrared sensor that emits infrared light, receives reflected light from a detection object by a light receiving unit, and performs a sensing determination according to the amount of received light. The light projecting areas of the light projecting means of the second sensor means are installed so as to intersect with different directions and partially overlap with each other, and the water supply control means determines that the first sensor means has been operated for a predetermined time. If the state becomes non-sensing after the sensing state continues, An automatic cleaning function, a manual cleaning function of supplying water when the first sensor and the second sensor are simultaneously in a sensing state, and a sensing function of the second sensor means when the first sensor means is not sensing. When the state is reached, the function of stopping the automatic cleaning function is provided, so that three cleaning modes of automatic cleaning, manual cleaning, and automatic cleaning stop can be operated by two sets of sensors, and the operability of each of them is also good. .
[0016]
According to a second aspect of the present invention, in the toilet bowl washing apparatus of the first aspect, the light emitting area of the first sensor means is obliquely downward with respect to the user, and the light emitting area of the second sensor means is arranged with respect to the user. It is set to be obliquely upward, and the light emitting means of the first sensor means is disposed above the light emitting means of the second sensor means. Functions can be divided according to the positional relationship, making it easy to remember operations.
[0017]
Claim 3 is the toilet bowl cleaning device according to Claims 1 or 2, wherein the light emitting means of the first sensor means, the third sensor means combining the light receiving means of the second sensor means, and the second sensor means. The sensor means, the light projecting means, and the fourth sensor means in combination with the light receiving means of the first sensor means. When the third sensor means or the fourth sensor means is in the sensing state, manual cleaning is performed. Since the function is activated, it is possible to satisfactorily sense even an operation in which the hand is in close contact with the sensor without adding a new sensor element.
[0018]
According to a fourth aspect of the present invention, in the toilet flushing device of the third aspect, the washing time when the third sensor means is in the sensing state is different from the washing time when the fourth sensor is in the sensing state. Therefore, additional functions such as switching between large and small cleaning can be realized without adding a new sensor element.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described in detail based on an embodiment shown in the drawings.
FIG. 1 is a configuration diagram of a sensor portion for explaining a first embodiment of the present invention, and FIG. 2 is a circuit diagram.
[0020]
In FIG. 2, reference numeral 1 denotes a control circuit for controlling the faucet device, which has a built-in microcomputer. Reference numeral 2 denotes a battery serving as a power supply, 4 denotes a solenoid of an electromagnetic valve (not shown) for opening and closing a water channel of the faucet device, and 3 denotes a solenoid energizing circuit for energizing the solenoid 4.
[0021]
5 and 6 constitute a sensor 1 for detecting a user. Reference numeral 5 denotes a light emitting portion of a sensor including an infrared light emitting diode and a constant current drive circuit, which is driven by the control circuit 1 and emits a predetermined output of infrared light in a pulsed manner toward a toilet user. .
Reference numeral 6 denotes a light receiving unit of a sensor including a photodiode and a current-voltage conversion circuit, and outputs a reflection output of infrared rays from a user of the toilet to the control circuit 1.
Similarly, the light projecting unit 9 and the light receiving unit 10 constitute the sensor 2 that detects a hand. As shown in FIG. 1, reference numeral 7 denotes an LED that indicates the sensing state of the sensor, and is turned on while the sensor is sensing.
[0022]
These sensors and elements of the display unit are arranged as shown in FIG. Each element in FIG. 1 has the same number as in FIG. 21 is a light emitting / receiving element holder, and 22 is a sensor case. The light emitting / receiving area of the sensor 1 faces downward from the horizontal, and the light emitting / receiving area of the sensor 2 faces upward from the horizontal. Further, the light emitting element 9 and the light receiving element 10 of the upward sensor 2 are arranged on the lower side, and the light emitting element 5 and the light receiving element 6 of the downward sensor 1 are arranged on the upper side.
[0023]
The operation of the first embodiment will be described with reference to the flowchart of FIG.
It starts from Step 1 (hereinafter S001). In S002, the sensor 1 is driven. At this time, the control circuit 1 drives the light emitting unit 5 in a pulsed manner, and reads the output level of the light receiving unit 6 in synchronization with the timing. In S003, it is checked whether or not the output of the light receiving unit 6 is equal to or more than the threshold value of the human body detection. If the output is larger than the threshold value, it is determined that the human body is detected.
[0024]
In the case of non-sensing, the display LED 7 is turned off in S006, and it is determined whether the sensing time is 10 seconds or more in S007, and the sensing time count is reset at the same time. If the sensing time is 10 seconds or longer, it is determined that the toilet has been used, and in S008, the solenoid energizing circuit 3 is driven to wash the toilet (automatic cleaning), and the process returns to S002.
[0025]
If it is less than 10 seconds in S007, the process proceeds to S009. The process proceeds to S009 even when the user has not continued, or when a person crosses in front of the toilet and the sensing time during that time is several seconds, the toilet is not used, and the process proceeds to S009. In S009, the control circuit 1 drives the light emitting unit 9 in a pulsed manner, and reads the output level of the light receiving unit 10 in synchronization with the timing. In S010, it is checked whether or not the output of the light receiving unit 10 is equal to or greater than a threshold value. The threshold value for determining that the sensor 1 detects the human body and the threshold value for determining that the hand senses the sensor 2 depend on the characteristics of the light emitting and receiving elements and the circuits constituting the sensor. It does not have to be the same.
[0026]
If the hand is not detected in S010, the process returns to S002. If a hand is detected in S010, that is, if the sensor 2 detects a hand in a state where the sensor 1 does not detect a human body, in steps S011 to S012, the sensor 2 is driven to wait until the hand is released. Elapses, or waits for a hand to be detected again from S014 to S015. When any of the conditions is satisfied, the process returns to S002. The loop from S013 to S015 forms a cleaning mode in which the automatic cleaning function is prohibited.
[0027]
If it is determined in step S003 that a human body is detected, it is further checked in step S004 whether the output of the sensor 1 has reached the hand detection level, which is higher than the human body detection level. If the hand has reached the sensing level in S004, it is determined that the user has a desire to immediately perform toilet cleaning, and the process advances to S008 to perform toilet cleaning (manual cleaning).
[0028]
If the output of the sensor 1 has not reached the hand sensing level in S004, the sensor 2 is driven in S016. In S017, it is checked whether the sensor 2 senses a hand. When the hand is detected in S017, the process proceeds to S008, where the toilet is washed (manual washing). If the hand is not detected in S017, the display LED 7 indicating the human body detection is turned on in S018, the sensing time is counted in S019, and the process returns to S002 to loop.
[0029]
The operation of the manual cleaning according to the present embodiment will be described with reference to FIG.
In FIG. 14, when the distance between the hand and the sensor is in the area of {circle around (2)}, it is determined that the hand is sensed in S004 of FIG. 3, and the process proceeds to toilet washing in S008. This is the same operation as the conventional operation. In FIG. 14, when the distance between the hand and the sensor is further closer to the area of {circle around (1)}, it is not determined that the hand is detected in S004 of FIG. Proceed to. That is, when the sensor 1 and the sensor 2 sense at the same time, it is determined that the hand is held over the front of the sensor, and the manual cleaning is performed. Therefore, since the manual cleaning can be performed in the area (1) and the area (2) in FIG. 14, the usability is good for the user.
[0030]
FIG. 4 is an external view of a sensor portion for explaining a second embodiment of the present invention, and FIG. 5 is a circuit diagram. However, the components in FIG. 5 are the same as those in FIG. 2, and FIG. 2 shows an additional combination of the sensors 3 and 4. The control circuit 1 makes the sensor 3 function by pulse driving the light projecting unit 5 and reading the output level of the light receiving unit 10 in synchronization with the timing. Similarly, the control circuit 1 causes the sensor 4 to function by pulse-driving the light projecting unit 9 and reading the output level of the light receiving unit 6 in synchronization with the timing.
[0031]
FIG. 6 is a diagram illustrating a detection state of the sensor 3 (the same applies to the sensor 4) at a short distance such that the sensor 3 is in close contact with the sensor surface. FIG. 7 shows the distance characteristics of the output of the sensor 3 (the same applies to the sensor 4).
[0032]
As shown in FIG. 6, the sensor 3 intersects the light emitting and receiving areas upward and downward. Therefore, reflection can be detected even when the sensor is in close contact with the sensor. However, when the distance is long, the overlapping of the light emitting and receiving areas is eliminated, and the output sharply decreases as the distance increases.
[0033]
FIG. 8 shows an operation flowchart of the second embodiment.
The operations from S001 to S019 are the same as those in FIG. If the automatic cleaning is performed in the determination of S007, or if the manual cleaning is performed in the determination of S004 or S017, the process goes through S020 except for entering the cleaning mode in S010. In S020, the light emitting unit 5 is driven to detect the output of the light receiving unit 10, and the sensor 3 is driven. In S021, it is checked whether or not the sensor 3 has sensed a hand. If so, the process proceeds to S008 to perform toilet flushing (manual washing).
If the hand is not sensed in S021, the light emitting unit 9 is driven to detect the output of the light receiving unit 6 and the sensor 4 is driven in S022. In S023, it is checked whether or not the sensor 4 has sensed a hand. If the sensor has sensed, the process proceeds to S008 to perform toilet flushing (manual flushing). If no hand is detected, the process returns to S002.
[0034]
As described above, in addition to the operation of the first embodiment, even when the hand is held so as to be in close contact with the sensor, the detection can be performed more reliably by driving the sensors 3 and 4.
[0035]
FIG. 9 is a configuration diagram of a sensor according to the third embodiment.
“Large” indicating cleaning for stool is displayed between the light emitting and receiving of the sensor 3 and “Small” indicating cleaning for urine is displayed between the light emitting and receiving of the sensor 4 on the sensor surface.
The operation of the third embodiment will be described with reference to the flowchart of FIG. FIG. 10 is different from FIG. 7 in the processing after S020.
First, a step of small cleaning of the toilet bowl in S024 is provided. This is a step of performing a small amount of cleaning for urination, and cleaning is performed in a shorter time than in S008. Since S024 is a small flush, the toilet flush in S008 is a large flush although there is no change in the flush amount.
In FIG. 10, when the sensor 3 detects a hand in S021, the large cleaning in S008 is performed as in the second embodiment. When the sensor 4 detects the hand in S023, the process proceeds to the small cleaning step in S024.
[0036]
The operation of FIG. 10 is the same as that of FIG. The word "small" is displayed in the portion where the sensor 4 in FIG. 9 senses, and the small cleaning is performed only when the user intentionally selects the small cleaning and operates the touch panel so as to come into contact with the sensor case. For other cleaning, large cleaning is performed according to the judgment of the safety side.
[0037]
【The invention's effect】
As described above, the sensor having an upward sensing area is arranged at the lower part of the sensor case, and the sensor having a downward sensing area is arranged at the upper part of the sensor case. The three washing modes of stop can be operated without contact.
In addition, by placing the sensor with the sensing area upward at the bottom of the sensor case and the sensor with the sensing area downward at the top of the sensor case, the detection performance when the hand is held in front of the sensor is improved, making it easier Can operate.
[0038]
In addition, by combining an upward light emitting element and a downward light receiving element or a combination of a downward light emitting element and an upward light receiving element to function as a sensor, even if the hands are brought into close contact with the sensor case, Can be detected.
Further, by allocating the functions according to the combination of the light emitting and receiving elements, the operation content can be further increased without adding a sensor element.
[0039]
In the embodiment, two sensors are arranged vertically, but depending on the layout of the toilet, a front-rear, left-right positional relationship may be adopted. Further, in the case of the first embodiment, the light receiving unit 6 and the light receiving unit 10 can be shared.
[0040]
[Brief description of the drawings]
FIG. 1 is an external view illustrating a configuration of a sensor unit according to a first embodiment of the present invention.
FIG. 2 is a circuit diagram of a sensor unit according to the first embodiment of the present invention.
FIG. 3 is a flowchart illustrating an operation of the sensor unit according to the first embodiment of the present invention.
FIG. 4 is an external view showing a configuration of a sensor unit according to a second embodiment of the present invention.
FIG. 5 is a circuit diagram of a sensor unit according to the second and third embodiments of the present invention.
FIG. 6 is a cross-sectional view illustrating sensing of a contact state of a sensor unit according to second and third embodiments of the present invention.
FIG. 7 shows distance characteristics of sensors 3 and 4 according to the second and third embodiments of the present invention.
FIG. 8 is a flowchart illustrating an operation of the sensor unit according to the second embodiment of the present invention.
FIG. 9 is an external view illustrating a configuration of a sensor unit according to a third embodiment of the present invention.
FIG. 10 is a flowchart illustrating an operation of a sensor unit according to a third embodiment of the present invention.
FIG. 11 is a diagram illustrating an operation of stopping a conventional automatic flush of a toilet.
FIG. 12 is a diagram illustrating a sensing state of a sensor having a small interval between light emitting and receiving elements.
FIG. 13 is a diagram showing a sensing state of a sensor having a large interval between light emitting and receiving elements.
FIG. 14 shows a distance characteristic of a sensor having a large interval between light emitting and receiving elements.
FIG. 15 shows a distance characteristic of a sensor in which a distance between light emitting and receiving elements is small.
FIG. 16 is a cross-sectional view when a hand is held over the front of a conventional sensor.
[Explanation of symbols]
1 ... microcomputer, 2 ... battery, 3 ... solenoid energizing circuit,
4 ... solenoid, 5 ... light emitting element (downward), 6 ... light receiving element (downward)
7: display LED, 9: light emitting element (upward), 10: light receiving element (upward)
21: Projector / light receiving element holder, 22: Sensor case, 23: Fixed frame

Claims (4)

便器の使用者を検出する第1のセンサ手段と、人体の一部を検出する第2のセンサ手段と、前記第1および第2のセンサ手段の出力に基づいて便器に流す洗浄水の給水制御を行う給水制御手段とを備えた便器洗浄装置において、前記第1のセンサ手段及び前記第2のセンサ手段は、検出体に向けて投光手段より赤外光を投光し、検出体からの反射光を受光手段で受光して、該受光量に応じて感知判断を行うアクティブ型赤外線センサであり、前記第1のセンサ手段の投光手段と前記第2のセンサ手段の投光手段の投光領域は、方向が異なり、かつ、一部が重複するように交差して設置され、前記給水制御手段は、前記第1のセンサ手段が所定時間以上感知状態が継続した後に非感知状態になると給水を行う自動洗浄機能と、前記第1のセンサと前記第2のセンサが同時に感知状態になると給水を行う手動洗浄機能と、前記第1のセンサ手段が非感知状態で前記第2のセンサ手段が感知状態となると、前記自動洗浄機能を停止する機能を備えたことを特徴とする便器洗浄装置。First sensor means for detecting a user of the toilet, second sensor means for detecting a part of the human body, and water supply control for flush water flowing to the toilet based on outputs of the first and second sensor means The first sensor means and the second sensor means project infrared light from a light projecting means toward a detection body, and supply the infrared light from the detection body. An active infrared sensor that receives reflected light with a light receiving unit and performs a sensing determination according to the amount of received light. The active infrared sensor is a type of an infrared sensor that emits light from the light emitting unit of the first sensor unit and the light emitting unit of the second sensor unit. The light areas have different directions and are installed so as to intersect so that a part thereof overlaps, and the water supply control means is configured to be in a non-sensing state after the first sensor means has been in a sensing state for a predetermined time or more. An automatic cleaning function for supplying water, and the first sensor A manual washing function for supplying water when the second sensor is simultaneously in a sensing state, and a function for stopping the automatic washing function when the second sensor means is in a sensing state while the first sensor means is not sensing. A toilet flushing device comprising: 請求項1の便器洗浄装置において、前記第1のセンサ手段の投光領域は使用者に対して斜め下方向、前記第2のセンサ手段の投光領域は使用者に対して斜め上方向に設定され、前記第1のセンサ手段の投光手段は前記第2のセンサ手段の投光手段よりも上に配置されていることを特徴とする便器洗浄装置。2. The toilet flushing device according to claim 1, wherein the light emitting area of the first sensor means is set obliquely downward with respect to the user, and the light emitting area of the second sensor means is set obliquely upward with respect to the user. The light emitting means of the first sensor means is disposed above the light emitting means of the second sensor means. 請求項1乃至2の便器洗浄装置において、前記第1のセンサ手段の投光手段と、前記第2のセンサ手段の受光手段を組み合わせた第3のセンサ手段と、前記第2のセンサ手段の投光手段と、前記第1のセンサ手段の受光手段を組み合わせた第4のセンサ手段とを備え、第3のセンサ手段または第4のセンサ手段が感知状態となると、給水を行う手動洗浄機能を備えたことを特徴とする便器洗浄装置。3. The toilet flushing apparatus according to claim 1, wherein the light emitting means of the first sensor means, the light receiving means of the second sensor means are combined with a third sensor means, and the light emitting means of the second sensor means is provided. A light sensor and a fourth sensor unit combining the light receiving unit of the first sensor unit; and a manual washing function of supplying water when the third sensor unit or the fourth sensor unit is in a sensing state. A toilet flushing device characterized by the following. 請求項3の便器洗浄装置において、前記第3のセンサ手段が感知状態となった場合の洗浄時間と、前記第4のセンサが感知状態となった場合の洗浄時間が異なることを特徴とする便器洗浄装置。4. The toilet bowl cleaning apparatus according to claim 3, wherein a cleaning time when said third sensor means is in a sensing state is different from a cleaning time when said fourth sensor is in a sensing state. Cleaning equipment.
JP2002281487A 2002-09-26 2002-09-26 Toilet bowl flushing device Pending JP2004116148A (en)

Priority Applications (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006304127A (en) * 2005-04-25 2006-11-02 Nec Corp Image scanner apparatus, control method therefor, image scanner apparatus control program, and recording medium
CN103806518A (en) * 2012-11-02 2014-05-21 科勒公司 Improved non-contact flushing system and method
CN113940576A (en) * 2021-10-14 2022-01-18 上海利康消毒高科技有限公司 Liquid discharging method of infrared non-contact liquid discharging device
US11859375B2 (en) 2009-12-16 2024-01-02 Kohler Co. Touchless faucet assembly and method of operation
US12493355B2 (en) 2022-04-14 2025-12-09 Kohler Co. Touchless plumbing control system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006304127A (en) * 2005-04-25 2006-11-02 Nec Corp Image scanner apparatus, control method therefor, image scanner apparatus control program, and recording medium
US11859375B2 (en) 2009-12-16 2024-01-02 Kohler Co. Touchless faucet assembly and method of operation
CN103806518A (en) * 2012-11-02 2014-05-21 科勒公司 Improved non-contact flushing system and method
CN103806518B (en) * 2012-11-02 2015-09-30 科勒公司 Improved non-contact flushing system and method
US9657471B2 (en) 2012-11-02 2017-05-23 Kohler Co. Touchless flushing systems and methods
US10851532B2 (en) 2012-11-02 2020-12-01 Kohler Co. Touchless flushing systems and methods
US11560702B2 (en) 2012-11-02 2023-01-24 Kohler Co. Touchless flushing systems and methods
US12098534B2 (en) 2012-11-02 2024-09-24 Kohler Co. Touchless flushing systems and methods
CN113940576A (en) * 2021-10-14 2022-01-18 上海利康消毒高科技有限公司 Liquid discharging method of infrared non-contact liquid discharging device
CN113940576B (en) * 2021-10-14 2023-08-15 上海利康消毒高科技有限公司 A liquid discharge method of an infrared non-contact liquid discharge device
US12493355B2 (en) 2022-04-14 2025-12-09 Kohler Co. Touchless plumbing control system

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