JP2004251665A - Ultrasonic sensor - Google Patents

Ultrasonic sensor Download PDF

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Publication number
JP2004251665A
JP2004251665A JP2003040148A JP2003040148A JP2004251665A JP 2004251665 A JP2004251665 A JP 2004251665A JP 2003040148 A JP2003040148 A JP 2003040148A JP 2003040148 A JP2003040148 A JP 2003040148A JP 2004251665 A JP2004251665 A JP 2004251665A
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Japan
Prior art keywords
ultrasonic sensor
ultrasonic
bumper
main body
housing
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JP2003040148A
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Japanese (ja)
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JP3975939B2 (en
Inventor
Naoya Azuma
直哉 東
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Priority to JP2003040148A priority Critical patent/JP3975939B2/en
Publication of JP2004251665A publication Critical patent/JP2004251665A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy-to-mount ultrasonic sensor for reducing problems on design without outstanding in appearance. <P>SOLUTION: This ultrasonic sensor comprises a bezel member A, a synthetic-resin molded article, inserted into a mounting hole Z bored through a bumper Y from the front side y1 of the bumper Y and fixed in the mounting hole Z, and an ultrasonic sensor body B mounted by being coupled to the bezel member A fixed/held in the mounting hole Z from the rear side y2 of the bumper Y. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、車両のバンパーに取り付けられる超音波センサに関するものである。
【0002】
【従来の技術】
超音波センサは、超音波を利用して障害物などのセンシングを行うものであり、超音波パルス信号を間欠的に送信し、周辺に存在する障害物からの反射波を受信することで障害物を検知する。
【0003】
超音波センサは検知範囲が限定できることや距離が測定できるという特徴を持ち、例えば図8に示すように車両XのバンパーYの隅部や車両Xの後部に取り付けられ、検知範囲S内の車や人、もしくは壁やガードレールなどの障害物を検知しドライバーに知らせる車両用障害物検知装置などに利用されてきた。
【0004】
超音波センサは一般に、図9に示すように、合成樹脂成形品のハウジング100内に超音波マイク101と電子回路部103とを収納している。
【0005】
超音波マイク101は、超音波の送波および受波を行うものであって、有底円筒状の保持ゴム102内に嵌められた後ハウジング100内に収納され、前面をハウジング100の一面から外部に露出させている。
【0006】
電子回路部103は、超音波を送波するための信号を発生して超音波マイク101に供給したり、超音波マイク101で受波した超音波を信号として受け取ったりするものであって、超音波マイク101と電気的に接続されている。
【0007】
また、ハウジング100の外面には、超音波センサを外部の制御装置などとハーネスを介して接続するためのコネクタ104が設けられている。
【0008】
さらに近年、2個の超音波マイクを内蔵し、三角測距の原理で距離と角度を求める超音波センサも考案されている(例えば、特許文献1、2参照。)。
【0009】
以上のように構成される超音波センサの取付構造においては、図10に示すようにバンパーYの表裏に貫通するように穿孔された取付孔Zに表面y1側から挿入して固定するタイプ1と、図11に示すように取付孔Zに裏面y2側から挿入して固定するタイプ2とに大きく分かれる。
【0010】
タイプ1の取付構造は、予め超音波センサのハウジング100の前端の外周縁にわたって突出片(フェーシャ部)100aが突設されており、バンパーYの表面y1側より超音波センサを挿入し、挿入後、突出片100aとの間にバンパーYを挟持する取付具(図示せず)をハウジング100に装着することでバンパーYに固定される(例えば、特許文献3参照。)。
【0011】
タイプ2の取付構造は、予めバンパーYの裏面y2において取付孔Zの開口縁部に取付用リブ200が複数立設されると共に、超音波センサのハウジング300の外周に凸部300aが複数突設されており、バンパーの裏面y2側から複数の取付用リブ200の間に超音波センサを挿入すると、取付用リブ200に設けられた孔200aとハウジング300に設けられた凸部300aとが凹凸嵌合することにより取り付けられる。
【0012】
【特許文献1】
特開2000−187075号公報(第3項、第5図)
【特許文献2】
特開2000−339595号公報(第4項、第3−5図)
【特許文献3】
特開平11−133136号公報(第1図)
【0013】
【発明が解決しようとする課題】
しかしながら、前記したタイプ1の取付構造においては、バンパーYに穿孔された取付孔Zから超音波センサを挿入して取り付けるため、取付孔Zの大きさを少なくとも超音波センサが通る大きさにする必要があり、超音波センサの大きさが大きくなると取付孔Zの大きさも大きくなり、外観的に目だったり見栄えが悪いなどデザイン的な問題があった。
【0014】
また、近年考案されている前記した2個の超音波マイクを内蔵する超音波センサにおいては、バンパーYにおける超音波センサの露出面積が大きくなり、デザイン的な問題が大きくなってきた。
【0015】
また、タイプ2の取付構造においては、バンパーYの裏側に予め取付用リブ200を設けておく必要があり、バンパーYの成形時に、取付用リブ200によるバンパー表面のひけなどの問題や、取付用リブ200が設けられていない箇所には取り付けることができないという問題があった。
【0016】
本発明は上記問題点に鑑みて為されたものであって、その目的とするところは、外観的に目立つことがなくデザイン的な問題を低減し、且つ簡単に取り付けることができる超音波センサを提供することにある。
【0017】
【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記載の超音波センサは、車両のバンパーの表裏に貫通するように穿孔された取付孔にバンパーの表側から挿入されバンパーを表裏から挟持する固定手段を備えたベゼル部材と、超音波マイクを収納した超音波センサ本体とからなり、該超音波センサ本体は前記ベゼル部材にバンパーの裏側から結合装着されてなるものとした。
【0018】
請求項2記載の超音波センサは、請求項1記載の発明において、前記ベゼル部材は、前記超音波センサ本体の前部が後瑞の開口から挿入される筒状の胴体部と、前記胴体部の後瑞部から延設され、前記胴体部から突出する前記超音波センサ本体の後部に形成された第1の係止手段と係合し前記超音波センサ本体を固定する第2の係止手段を備えた弾性変形可能なアーム部と、前記胴体部の前端の外周縁に沿って設けられ前記バンパーの表側の面と当接して前記胴体部の外周面と取付孔の内周面との間の隙間を目隠しするフェーシャ部とを備えたものとした。
【0019】
請求項3記載の超音波センサは、請求項2記載の発明において、前記胴体部の内面と前記胴体部に挿入される前記超音波センサ本体の前部の外面とのうち何れか一方に凸部を形成し、他方に前記凸部と凹凸嵌合し前記超音波センサ本体の上下方向の誤挿入を防止する誤挿入防止用凹部を形成したものとした。
【0020】
請求項4記載の超音波センサは、請求項2又は3記載の発明において、前記アーム部の先端を外側に屈曲した形状とした。
【0021】
請求項5記載の超音波センサは、請求項2乃至4の何れか記載の発明において、前記超音波センサ本体は、前面に収納孔が開口したハウジングを有し、前記収納孔に筒状の保持ゴムに嵌め込まれた前記超音波マイクが収納され、前記収納孔から外部に臨んだ前記超音波マイクの前面の周囲に、前記超音波マイクの前面側から反対側へ向かうにつれて外側に広がるように傾斜する第1の傾斜面が、前記保持ゴムから前記ハウジングに跨って形成され、前記ベゼル部材は、前記第1の傾斜面と当接する第2の傾斜面を有する突片が、前記胴体部の前端の開口に形成されたものとした。
【0022】
【発明の実施の形態】
以下、本発明を実施形態1、2によって説明する。
【0023】
(実施形態1)
図1に、本実施形態の超音波センサの側面断面図を示す。この超音波センサは、バンパーYの表裏に貫通するように穿孔された取付孔Z(図4参照。)にバンパーYの表面y1側から挿入され取付孔Zに固定される合成樹脂成形品のベゼル部材Aと、バンパーYに固定されたベゼル部材AにバンパーYの裏面y2側から結合装着される超音波センサ本体Bとから構成される。
【0024】
まず、超音波センサ本体Bについて説明する。
【0025】
本実施形態の超音波センサ本体Bは、図2(a)〜(d)に示すように、2個の超音波マイク101a,101bを内蔵するタイプであり、合成樹脂成形品のハウジング1内に超音波マイク101a,101bと電子回路部103(図1参照。)とを収納している。
【0026】
ハウジング1は、直方体形状のハウジング後部1aと、ハウジング後部1aの一面から一体に延設され略筒状のハウジング前部1bとからなる。
【0027】
ハウジング後部1aは、内部に電子回路部103が収納され、図2(b)における上面および下面には第1の係止手段としての組立爪2が2個ずつ設けられている。組立爪2は、ハウジング後部1aの前側から後側に向かうにつれて外側に広がるように傾斜する傾斜面2aを有している。
【0028】
また、ハウジング後部1aの下面には、超音波センサを外部の制御装置などとハーネスを介して接続するための下方が開口した箱形のコネクタ104が設けられている。
【0029】
電子回路部103は、超音波を送波するための信号を発生して超音波マイク101aに供給したり、超音波マイク101a、101bで受波した超音波を信号として受け取ったりするための回路の構成部品が回路基板に実装されている。
【0030】
電子回路部103は、超音波マイク101a,101bおよびコネクタ104内に設けられた端子(図示せず)と電気的に接続されている。
【0031】
ハウジング前部1bは、2個の超音波マイク101a,101bがそれぞれ収納される円柱状の収納孔3,3が前面(図2(d)における左側の面)に開口しており、上面にはハウジング1の上下方向の誤挿入を防止するための誤挿入防止用凸部4が形成されている。
【0032】
また、ハウジング前部1bの前面において、収納孔3,3の開口縁部には、ハウジング前部1bからハウジング後部1aに向かうにつれて外側に広がるように傾斜する傾斜面5aが形成されている。
【0033】
2個の超音波マイク101a,101bのうち、一方の超音波マイク101aは送波/受波兼用であり、他方の超音波マイク101bは受波専用である。
【0034】
それぞれの超音波マイク101a,101bは、有底円筒状の保持ゴム102,102に嵌め込まれて、外周面が保持ゴム102,102で覆われている。
【0035】
保持ゴム102,102は、超音波マイク101a,101bの前面(図2(d)における左側の面)の周囲となる端縁に、超音波マイク101a,101bの前面から後方に向かうにつれて外側に広がるように傾斜する傾斜面5bが形成されている(図4も参照。)。
【0036】
保持ゴム102,102に覆われた超音波マイク101a,101bは、ハウジング前部1bの収納孔3,3に差し込まれて、ハウジング1内に収納される。
【0037】
このとき、ハウジング前部1bの傾斜面5aと、保持ゴム102,102の傾斜面5bとが略同一斜面となり、超音波マイク101a,101bの前面の周囲に、超音波マイク101a,101bの前面からハウジング後部1aの方向に向かうにつれて外側に広がるように傾斜する第1の傾斜面5が、保持ゴム102,102からハウジング前部1bに跨って形成される。
【0038】
以上のように構成された超音波センサ本体Bは、一方の超音波マイク101aが超音波を送波してから、両方の超音波マイク101a,101bが反射波を受波するまでの時間を計測することにより、障害物までの距離と角度を求めることができる。
【0039】
次に、ベゼル部材Aについて説明する。
【0040】
ベゼル部材Aは、図3(a)〜(e)に示すように、超音波センサ本体Bのハウジング前部1bが後瑞(図3(e)における右側)の開口から挿入される筒状の胴体部10と、胴体部10の後端部から延設され、超音波センサ本体Bのハウジング後部1aに形成された組立爪2と係合し超音波センサ本体Bを固定する第2の係止手段としての組立孔12aを備えた4本の弾性変形可能なアーム部12と、胴体部10の前端の外周縁に沿って突出して形成されたフェーシャ部11とからなる。
【0041】
胴体部10の外周形状は、取付孔Zの開口形状と略同じであり、図3(e)における上面および下面には、一端が胴体部10に支持され弾性変形可能な弾性片13が2個ずつ設けられ、さらに弾性片13の外面には係止爪13aがそれぞれ形成されている。係止爪13aは、胴体部10の後側から前側に向かうにつれて外側に広がるように傾斜する傾斜面13bを有している。係止爪13aは、フェーシャ部11と合わせてバンパーYを表裏から挟持する固定手段を構成する。
【0042】
胴体部10の後端は、ハウジング前部1bが挿入できるように開口しており、開口した後瑞の内面の上側には、超音波センサ本体Bの上面に設けられた誤挿入防止用凸部4と凹凸嵌合し、ハウジング1の上下方向の誤挿入を防止する誤挿入防止用凹部としての切り欠き14が形成されている。
【0043】
胴体部10の前端は、ハウジング前部1bが挿入された時にハウジング前部1bに形成された第1の傾斜面5と当接するように、胴体部10の前方から後方へ向かうにつれて外側に広がるように傾斜する第2の傾斜面15aを有する突片15が胴体部10の内側方向へフェーシャ部11の前面と一体に延設されている(図4も参照。)。
【0044】
突片15の傾斜面15aで周囲を囲まれた部位は、2個の超音波マイク101a,101bの前面をそれぞれ外部に臨ませる窓10a,10aとなる。
【0045】
アーム部12は、胴体部10の後瑞部の上面および下面から、2本ずつ延設されており、超音波センサ本体Bがベゼル部材Aに装着された時に、ハウジング後部1aの外面に沿う形状に形成されている。
【0046】
また、それぞれのアーム部12の略中央には前記した組立孔12aが穿孔されている。
【0047】
また、アーム部12の先端は外側に屈曲した形状であり、後述するメンテナンス用レバー12bが形成されている。
【0048】
フェーシャ部11は、ベゼル部材Aが取付孔ZにバンパーYの表面y1側から挿入されると、フェーシャ部11の裏面が取付孔Zの開口縁部に当接し、胴体部10の外周面と取付孔Zの内周面との間の隙間を目隠しする。
【0049】
次に、以上のように形成されたベゼル部材Aおよび超音波センサ本体Bを用いて、本実施形態の超音波センサをバンパーYに取り付ける方法を、図4を用いて説明する。
【0050】
まず、バンパーYに、バンパーYの表裏に貫通するように取付孔Zを穿孔する。取付孔Zの開口形状は、ベゼル部材Aの胴体部10の外周形状と略同じに形成する。
【0051】
次に、バンパーYの表面y1側から、アーム部12を内側に弾性変形させながら取付孔Zを通過させ、取付孔Zにベゼル部材Aを挿入する(矢印S1)。
【0052】
この時、ベゼル部材Aの胴体部10の外周形状は取付孔Zの開口形状と略同じであるため、胴体部10の上面および下面に設けた弾性片13の係止爪13aの傾斜面13bが取付孔Zの内周面に押圧され、弾性片13が一端を支点として胴体部10の内側へ弾性変形する。
【0053】
そして、フェーシャ部11の裏面が取付孔Zの開口縁部に当接するまでベゼル部Aを挿入すると、係止爪13aが取付孔Zの内周面を抜けて弾性片13の押圧が解除され、弾性片13が元の形状に戻って係止爪13aが取付孔Zの裏面y2側の開口縁部に係止される。
【0054】
これにより、ベゼル部材Aは、フェーシャ部11の裏面と係止爪13aとで取付孔Zの開口縁部を表裏から挟持してバンパーYに固定される。
【0055】
次に、バンパーYの裏面y2側からベゼル部材Aの胴体部10に、超音波センサ本体Bのハウジング前部1bを挿入する(矢印S2)。
【0056】
この時、超音波センサ本体Bのハウジング前部1bに形成された誤挿入防止用凸部4と、ベゼル部材Aの胴体部10に設けられた切り欠き14とが凹凸嵌合する。万が一、超音波センサ本体Bの上下方向を間違えて挿入しようとしたときは、誤挿入防止用凸部4が胴体部10の後瑞縁に当たって超音波センサ本体Bを挿入することができないため、上下方向の誤挿入が防止される。
【0057】
またこの時、アーム部12がハウジング後部1aに設けられた組立爪2の傾斜面2aに押圧されて外側へと弾性変形する。
【0058】
そして第1の傾斜面5が第2の傾斜面15aに当接するまで挿入すると、組立爪2とアーム部12に穿孔された組立孔12aとの位置が一致し、アーム部12の押圧が解除されてアーム部12が元の形状に戻り、組立爪2と組立孔12aとが係合し超音波センサ本体Bがベゼル部材Aに結合装着される(図1も参照。)。
【0059】
この時、超音波センサ本体Bのハウジング前部1bが筒状の胴体部10に挿入されているため、十分な保持強度を得ることができる。
【0060】
また、アーム部12は、弾性変形可能なため、超音波センサBを挿入する時の挿入力は、大きな挿入力を必要としない。
【0061】
また、第1の傾斜面5と第2の傾斜面15aとが当接しているため、ベゼル部材Aに超音波センサ本体Bを結合装着後は、超音波センサ本体Bはもちろん、保持ゴム102および保持ゴム102に差し込まれた超音波マイク101a、101bが前方に飛び出すのを防止できる。
【0062】
一度装着した超音波センサBを取り外す時は、アーム部12の先端のメンテナンス用レバー12bを掴んでアーム部12を外側に開き、組立爪2と組立孔12aの係合を解除すればよい。メンテナンス用レバー12bの形状が外側に屈曲した形状のため、容易にメンテナンス用レバー12bを掴むことができる。
【0063】
かかる超音波センサにおいては、取付孔Zに超音波センサ本体Bを通すことがないので、取付孔Zの大きさが小さくて済み、外観的に目立たなくなり、バンパーYのデザインを損なうことがない。
【0064】
また、バンパーYは、特別な取付用リブなどを必要とせず取付孔Zを穿孔するだけでよいので、成形時のひけなどの問題もなく、超音波センサの取付場所の選択肢も広がる。
【0065】
また、取付孔Zにベゼル部材Aを挿入しその後超音波センサ本体Bをベゼル部材に挿入するだけで簡単に取り付けることができ、また取り付け後も十分な保持強度を得ることができ、さらにメンテナンス用レバー12bを設けたことでメンテナンス時の作業性にも優れている。
【0066】
(実施形態2)
実施形態1の超音波センサは、2個の超音波マイク101a、101bを内蔵するタイプであったが、本実施形態の超音波センサは、図5および図6に示すように1個の超音波マイク101aのみを内蔵するタイプである。
【0067】
1個の超音波マイク101aを内蔵する超音波センサであっても、図7に示すように実施形態1同様の構成・取り付け方にて、バンパーYに取り付けることができる。
【0068】
なお、本実施形態は実施形態1と共通するために共通する部分については同一の符号を付して説明を省略する。
【0069】
【発明の効果】
請求項1記載の超音波センサは、車両のバンパーの表裏に貫通するように穿孔された取付孔にバンパーの表側から挿入されバンパーを表裏から挟持する固定手段を備えたベゼル部材と、超音波マイクを収納した超音波センサ本体とからなり、該超音波センサ本体は前記ベゼル部材にバンパーの裏側から結合装着されてなるので、取付孔に前記超音波センサ本体を通す必要がないので取付孔の大きさを小さくでき、その結果外観的に目立たなくなりデザイン的な問題を低減できるという効果がある。さらに、バンパーに特別な取付用リブなどを必要とせず、取付孔に前記ベゼル部材を表側から挿入し前記固定手段により前記ベゼル部材をバンパーに固定させ、前記超音波センサ本体をベゼル部材に裏側から結合装着するだけで簡単に取り付けることができるという効果がある。
【0070】
請求項2記載の超音波センサは、請求項1記載の発明において、前記ベゼル部材は、前記超音波センサ本体の前部が後瑞の開口から挿入される筒状の胴体部と、前記胴体部の後瑞部から延設され、前記胴体部から突出する前記超音波センサ本体の後部に形成された第1の係止手段と係合し前記超音波センサ本体を固定する第2の係止手段を備えた弾性変形可能なアーム部と、前記胴体部の前端の外周縁に沿って設けられ前記バンパーの表側の面と当接して前記胴体部の外周面と取付孔の内周面との間の隙間を目隠しするフェーシャ部とを備えたので、筒状の前記胴体部に超音波センサ本体の前部を挿入することで十分な保持強度を得ることができ、また前記アーム部に前記第2の係止手段を設けたことで、前記超音波センサ本体を前記胴体部に挿入する時は前記アーム部が弾性変形して大きな挿入力を必要せず、また前記フェーシャ部を備えることで取付孔を目立たなくできるという効果がある。
【0071】
請求項3記載の超音波センサは、請求項2記載の発明において、前記胴体部の内面と前記胴体部に挿入される前記超音波センサ本体の前部の外面とのうち何れか一方に凸部を形成し、他方に前記凸部と凹凸嵌合し前記超音波センサ本体の上下方向の誤挿入を防止する誤挿入防止用凹部を形成したので、前記超音波センサ本体の上下方向の誤挿入を防止できるという効果がある。
【0072】
請求項4記載の超音波センサは、請求項2又は3記載の発明において、前記アーム部の先端を外側に屈曲した形状としたので、前記アーム部の先端が掴みやすくなり、前記アーム部の先端を掴んで前記アーム部を外側に開き一度装着した前記超音波センサ本体を前記ベゼル部材から取り外す時のメンテナンス性に優れるという効果がある。
【0073】
請求項5記載の超音波センサは、請求項2乃至4の何れか記載の発明において、前記超音波センサ本体は、前面に収納孔が開口したハウジングを有し、前記収納孔に筒状の保持ゴムに嵌め込まれた前記超音波マイクが収納され、前記収納孔から外部に臨んだ前記超音波マイクの前面の周囲に、前記超音波マイクの前面側から反対側へ向かうにつれて外側に広がるように傾斜する第1の傾斜面が、前記保持ゴムから前記ハウジングに跨って形成され、前記ベゼル部材は、前記第1の傾斜面と当接する第2の傾斜面を有する突片が、前記胴体部の前端の開口に形成されたので、前記超音波センサ本体を前記ベゼル部材に装着した後は、前記第1の傾斜面と前記第2の傾斜面とが当接することで、前記ハウジングおよび前記保持ゴムおよび前記保持ゴムに嵌め込まれた前記超音波マイクの前方への飛び出しを防止することができるという効果がある。
【図面の簡単な説明】
【図1】実施形態1の超音波センサをバンパーに取り付けた状態を示す側面断面図である。
【図2】(a)同上の超音波センサ本体の上面図である。
(b)同上の超音波センサ本体の前面図である。
(c)同上の超音波センサ本体の下面図である。
(d)同上の超音波センサ本体の側面図である。
【図3】(a)同上のベゼル部材の上面図である。
(b)同上のベゼル部材の前面図である。
(c)同上のベゼル部材の下面図である。
(d)同上のベゼル部材の後面図である。
(e)同上のベゼル部材の側面図である。
【図4】同上の超音波センサをバンパーに取り付ける方法を説明する図である。
【図5】(a)実施形態2の超音波センサのベゼル部材の前面図である。
(b)同上のベゼル部材の側面断面図である。
【図6】同上の超音波センサ本体の側面断面図である。
【図7】同上の超音波センサをバンパーに取り付けた状態を示す側面断面図である。
【図8】超音波センサを車両に取り付けた状態を示す図である。
【図9】従来の超音波センサの構成を示す側面断面図である。
【図10】(a)同上の超音波センサの前面図である。
(b)同上の超音波センサをバンパーに取り付ける方法を説明する図である。
【図11】同上の超音波センサをバンパーに取り付ける別の方法を説明する図である。
【符号の説明】
1 ハウジング
1a ハウジング後部
1b ハウジング前部
2 組立爪
3 収納孔
4 誤挿入防止用凸部
5 第1の傾斜面
10 胴体部
10a 窓
11 フェーシャ部
12 アーム部
12a 組立孔
12b メンテナンス用レバー
13 弾性片
13a 係止爪
14 切り欠き
15 突片
15a 第2の傾斜面
101a,101b 超音波マイク
102 保持ゴム
103 電子回路部
A ベゼル部材
B 超音波センサ本体
Y バンパー
Z 取付孔
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an ultrasonic sensor attached to a vehicle bumper.
[0002]
[Prior art]
Ultrasonic sensors use ultrasonic waves to sense obstacles and the like, and transmit ultrasonic pulse signals intermittently and receive reflected waves from obstacles in the surrounding area to detect obstacles. Is detected.
[0003]
The ultrasonic sensor has a feature that the detection range can be limited and the distance can be measured. For example, as shown in FIG. 8, the ultrasonic sensor is attached to the corner of the bumper Y of the vehicle X or the rear portion of the vehicle X, and the vehicle within the detection range S It has been used as an obstacle detection device for a vehicle that detects a person or an obstacle such as a wall or a guardrail and notifies the driver of the obstacle.
[0004]
As shown in FIG. 9, the ultrasonic sensor generally has an ultrasonic microphone 101 and an electronic circuit unit 103 housed in a housing 100 made of a synthetic resin.
[0005]
The ultrasonic microphone 101 transmits and receives ultrasonic waves. The ultrasonic microphone 101 is housed in the housing 100 after being fitted into a cylindrical holding rubber 102 having a bottom, and has a front surface from one surface of the housing 100 to the outside. It is exposed to.
[0006]
The electronic circuit unit 103 generates a signal for transmitting an ultrasonic wave and supplies the signal to the ultrasonic microphone 101 or receives an ultrasonic wave received by the ultrasonic microphone 101 as a signal. It is electrically connected to the acoustic microphone 101.
[0007]
A connector 104 for connecting the ultrasonic sensor to an external control device or the like via a harness is provided on an outer surface of the housing 100.
[0008]
In recent years, an ultrasonic sensor that incorporates two ultrasonic microphones and obtains a distance and an angle based on the principle of triangulation has been devised (for example, see Patent Documents 1 and 2).
[0009]
In the mounting structure of the ultrasonic sensor configured as described above, as shown in FIG. 10, a type 1 is fixed by inserting from the surface y1 side into the mounting hole Z that is formed so as to penetrate the front and back of the bumper Y. As shown in FIG. 11, the type is largely divided into a type 2 which is inserted into the mounting hole Z from the back surface y2 side and fixed.
[0010]
In the type 1 mounting structure, a protruding piece (fascia portion) 100a is protruded in advance over the outer peripheral edge of the front end of the housing 100 of the ultrasonic sensor, and the ultrasonic sensor is inserted from the surface y1 side of the bumper Y, and after the insertion. The mounting member (not shown) for holding the bumper Y between the protrusion 100a and the projecting piece 100a is fixed to the bumper Y by attaching the mounting member to the housing 100 (for example, see Patent Document 3).
[0011]
In the type 2 mounting structure, a plurality of mounting ribs 200 are provided upright on the opening edge of the mounting hole Z on the back surface y2 of the bumper Y, and a plurality of convex portions 300a are protruded from the outer periphery of the housing 300 of the ultrasonic sensor. When the ultrasonic sensor is inserted between the plurality of mounting ribs 200 from the back surface y2 side of the bumper, the holes 200a provided in the mounting ribs 200 and the convex portions 300a provided in the housing 300 are unevenly fitted. Attach by fitting.
[0012]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-187075 (Section 3, FIG. 5)
[Patent Document 2]
JP-A-2000-339595 (Section 4, FIG. 3-5)
[Patent Document 3]
JP-A-11-133136 (FIG. 1)
[0013]
[Problems to be solved by the invention]
However, in the type 1 mounting structure described above, since the ultrasonic sensor is inserted and mounted through the mounting hole Z drilled in the bumper Y, the size of the mounting hole Z must be at least as large as the ultrasonic sensor can pass. When the size of the ultrasonic sensor is increased, the size of the mounting hole Z is also increased, and there is a design problem such as an external appearance and poor appearance.
[0014]
Further, in the ultrasonic sensor having the two built-in ultrasonic microphones that has been recently devised, the exposed area of the ultrasonic sensor in the bumper Y becomes large, and the design problem becomes large.
[0015]
Further, in the type 2 mounting structure, it is necessary to provide the mounting rib 200 on the back side of the bumper Y in advance. There is a problem that it cannot be attached to a place where the rib 200 is not provided.
[0016]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an ultrasonic sensor that can reduce the design problem without being noticeable in appearance and can be easily attached. To provide.
[0017]
[Means for Solving the Problems]
In order to achieve the above object, the ultrasonic sensor according to claim 1 includes fixing means inserted from the front side of the bumper into a mounting hole formed so as to penetrate the front and back of the bumper of the vehicle, and holding the bumper from the front and back. And an ultrasonic sensor body accommodating an ultrasonic microphone. The ultrasonic sensor body is attached to the bezel member from the back side of a bumper.
[0018]
In the ultrasonic sensor according to the second aspect, in the invention according to the first aspect, the bezel member includes a cylindrical body part in which a front part of the ultrasonic sensor main body is inserted from a rear opening, and the body part. A second locking means extending from a rear part of the main body and engaging with first locking means formed at a rear part of the ultrasonic sensor main body protruding from the body part to fix the ultrasonic sensor main body. An elastically deformable arm portion provided with an outer peripheral surface at a front end of the body portion and abutting against a front surface of the bumper, between the outer peripheral surface of the body portion and the inner peripheral surface of the mounting hole. And a fascia part for blindfolding the gap.
[0019]
An ultrasonic sensor according to a third aspect of the present invention is the ultrasonic sensor according to the second aspect, wherein one of the inner surface of the body portion and the outer surface of the front portion of the ultrasonic sensor body inserted into the body portion has a convex portion. And an erroneous insertion preventing concave portion which is fitted on the other side with the convex portion so as to prevent erroneous insertion of the ultrasonic sensor main body in the vertical direction.
[0020]
According to a fourth aspect of the present invention, in the ultrasonic sensor according to the second or third aspect, a tip of the arm portion is bent outward.
[0021]
According to a fifth aspect of the present invention, in the ultrasonic sensor according to any one of the second to fourth aspects, the ultrasonic sensor main body has a housing having a storage hole opened in a front surface, and the storage hole has a cylindrical shape. The ultrasonic microphone fitted into rubber is housed, and is inclined around the front surface of the ultrasonic microphone facing the outside from the housing hole so as to spread outward from the front side of the ultrasonic microphone toward the opposite side. A first inclined surface is formed from the holding rubber across the housing, and the bezel member has a projecting piece having a second inclined surface in contact with the first inclined surface, the front end of the body portion. Was formed in the opening of.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described with reference to Embodiments 1 and 2.
[0023]
(Embodiment 1)
FIG. 1 is a side sectional view of the ultrasonic sensor according to the present embodiment. This ultrasonic sensor is a bezel of a synthetic resin molded product which is inserted into a mounting hole Z (see FIG. 4) drilled so as to penetrate the front and back of the bumper Y from the surface y1 side of the bumper Y and fixed to the mounting hole Z. It is composed of a member A and an ultrasonic sensor main body B which is connected and attached to the bezel member A fixed to the bumper Y from the back surface y2 side of the bumper Y.
[0024]
First, the ultrasonic sensor body B will be described.
[0025]
As shown in FIGS. 2A to 2D, the ultrasonic sensor body B of the present embodiment is of a type that incorporates two ultrasonic microphones 101a and 101b, and is provided in a housing 1 of a synthetic resin molded product. The ultrasonic microphones 101a and 101b and the electronic circuit unit 103 (see FIG. 1) are housed therein.
[0026]
The housing 1 includes a housing rear portion 1a having a rectangular parallelepiped shape, and a substantially cylindrical housing front portion 1b integrally extending from one surface of the housing rear portion 1a.
[0027]
The housing rear portion 1a houses the electronic circuit portion 103 therein, and is provided with two assembly claws 2 as first locking means on the upper surface and the lower surface in FIG. 2B. The assembling claw 2 has an inclined surface 2a that is inclined so as to expand outward from the front side to the rear side of the housing rear portion 1a.
[0028]
In addition, a box-shaped connector 104 having an opening at the bottom for connecting the ultrasonic sensor to an external control device or the like via a harness is provided on the lower surface of the housing rear portion 1a.
[0029]
The electronic circuit unit 103 is a circuit for generating a signal for transmitting an ultrasonic wave and supplying the signal to the ultrasonic microphone 101a, or receiving the ultrasonic waves received by the ultrasonic microphones 101a and 101b as a signal. The component is mounted on the circuit board.
[0030]
The electronic circuit unit 103 is electrically connected to terminals (not shown) provided in the ultrasonic microphones 101a and 101b and the connector 104.
[0031]
The housing front part 1b has cylindrical storage holes 3 and 3 in which two ultrasonic microphones 101a and 101b are stored, respectively, which are opened on the front surface (the left side surface in FIG. 2D). An erroneous insertion preventing projection 4 for preventing erroneous insertion of the housing 1 in the vertical direction is formed.
[0032]
In addition, on the front surface of the housing front part 1b, an inclined surface 5a is formed at the opening edge of the storage holes 3 and 3 so as to extend outward from the housing front part 1b toward the housing rear part 1a.
[0033]
Of the two ultrasonic microphones 101a and 101b, one ultrasonic microphone 101a is used for both transmitting and receiving, and the other ultrasonic microphone 101b is used exclusively for receiving.
[0034]
Each of the ultrasonic microphones 101a and 101b is fitted into a holding rubber 102 having a bottomed cylindrical shape, and the outer peripheral surface is covered with the holding rubber 102.
[0035]
The holding rubbers 102, 102 extend to the periphery around the front surfaces (left surfaces in FIG. 2D) of the ultrasonic microphones 101a, 101b, and outwardly outward from the front surfaces of the ultrasonic microphones 101a, 101b. The inclined surface 5b is formed as described above (see also FIG. 4).
[0036]
The ultrasonic microphones 101a and 101b covered by the holding rubbers 102 and 102 are inserted into the storage holes 3 and 3 of the housing front part 1b and stored in the housing 1.
[0037]
At this time, the inclined surface 5a of the front part 1b of the housing and the inclined surface 5b of the holding rubbers 102, 102 have substantially the same inclined surface, and are arranged around the front surfaces of the ultrasonic microphones 101a, 101b from the front surfaces of the ultrasonic microphones 101a, 101b. A first inclined surface 5 that inclines so as to spread outwardly toward the housing rear portion 1a is formed from the holding rubbers 102 and 102 to the housing front portion 1b.
[0038]
The ultrasonic sensor body B configured as described above measures the time from when one ultrasonic microphone 101a transmits ultrasonic waves to when both ultrasonic microphones 101a and 101b receive reflected waves. By doing so, the distance and angle to the obstacle can be obtained.
[0039]
Next, the bezel member A will be described.
[0040]
As shown in FIGS. 3A to 3E, the bezel member A has a cylindrical shape in which the housing front portion 1b of the ultrasonic sensor main body B is inserted through an opening in the rear side (right side in FIG. 3E). A second locking portion extending from the rear end of the body portion 10 and the body portion 10 and engaging with the assembly claw 2 formed on the housing rear portion 1a of the ultrasonic sensor body B to fix the ultrasonic sensor body B. It comprises four elastically deformable arms 12 having assembling holes 12a as means, and a fascia part 11 formed to protrude along the outer peripheral edge of the front end of the body part 10.
[0041]
The outer peripheral shape of the body portion 10 is substantially the same as the opening shape of the mounting hole Z, and two elastic pieces 13 whose one end is supported by the body portion 10 and which is elastically deformable are provided on the upper surface and the lower surface in FIG. Each of the elastic pieces 13 has a locking claw 13a formed on the outer surface thereof. The locking claw 13a has an inclined surface 13b that is inclined so as to expand outward from the rear side to the front side of the body portion 10. The locking claw 13a constitutes a fixing means for holding the bumper Y from the front and back together with the fascia portion 11.
[0042]
The rear end of the body 10 is open so that the front part 1b of the housing can be inserted. Above the inner surface of the opened rear part, an erroneous insertion preventing projection provided on the upper surface of the ultrasonic sensor body B is provided. A notch 14 is formed as an erroneous insertion preventing concave portion which is fitted into the concave and convex portions 4 to prevent erroneous insertion of the housing 1 in the vertical direction.
[0043]
The front end of the body 10 extends outward from the front to the rear of the body 10 so as to come into contact with the first inclined surface 5 formed on the housing front 1b when the housing front 1b is inserted. A protruding piece 15 having a second inclined surface 15a that is inclined inwardly extends integrally with the front surface of the facer portion 11 inward of the body portion 10 (see also FIG. 4).
[0044]
The area surrounded by the inclined surface 15a of the protruding piece 15 becomes windows 10a, 10a that allow the front surfaces of the two ultrasonic microphones 101a, 101b to face the outside, respectively.
[0045]
The arms 12 extend two by two from the upper surface and the lower surface of the rear part of the body 10, and have a shape along the outer surface of the housing rear part 1 a when the ultrasonic sensor body B is mounted on the bezel member A. Is formed.
[0046]
The above-described assembling hole 12a is formed substantially at the center of each arm portion 12.
[0047]
The tip of the arm portion 12 is bent outward, and has a maintenance lever 12b described later.
[0048]
When the bezel member A is inserted into the mounting hole Z from the front surface y1 side of the bumper Y, the back surface of the facer portion 11 comes into contact with the opening edge of the mounting hole Z, and the facer portion 11 is attached to the outer peripheral surface of the body portion 10. The gap between the hole Z and the inner peripheral surface is blindfolded.
[0049]
Next, a method of attaching the ultrasonic sensor of the present embodiment to the bumper Y using the bezel member A and the ultrasonic sensor main body B formed as described above will be described with reference to FIG.
[0050]
First, a mounting hole Z is formed in the bumper Y so as to penetrate the front and back of the bumper Y. The opening shape of the mounting hole Z is formed to be substantially the same as the outer peripheral shape of the body portion 10 of the bezel member A.
[0051]
Next, from the surface y1 side of the bumper Y, the arm portion 12 is passed through the mounting hole Z while being elastically deformed inward, and the bezel member A is inserted into the mounting hole Z (arrow S1).
[0052]
At this time, since the outer shape of the body portion 10 of the bezel member A is substantially the same as the opening shape of the mounting hole Z, the inclined surface 13b of the locking claw 13a of the elastic piece 13 provided on the upper surface and the lower surface of the body portion 10 The elastic piece 13 is pressed against the inner peripheral surface of the mounting hole Z and elastically deforms to the inside of the body 10 around one end as a fulcrum.
[0053]
When the bezel portion A is inserted until the back surface of the facer portion 11 contacts the opening edge of the mounting hole Z, the locking claw 13a passes through the inner peripheral surface of the mounting hole Z, and the pressing of the elastic piece 13 is released. The elastic piece 13 returns to its original shape, and the locking claw 13a is locked to the opening edge on the back surface y2 side of the mounting hole Z.
[0054]
As a result, the bezel member A is fixed to the bumper Y by sandwiching the opening edge of the mounting hole Z from the front and back by the back surface of the facer portion 11 and the locking claw 13a.
[0055]
Next, the housing front part 1b of the ultrasonic sensor main body B is inserted into the body part 10 of the bezel member A from the back surface y2 side of the bumper Y (arrow S2).
[0056]
At this time, the protrusion 4 for preventing erroneous insertion formed on the front part 1b of the housing of the ultrasonic sensor main body B and the notch 14 provided on the body part 10 of the bezel member A are fitted to each other. If the vertical direction of the ultrasonic sensor body B is erroneously inserted in the vertical direction, the erroneous insertion preventing projection 4 hits the rear edge of the body 10 and the ultrasonic sensor main body B cannot be inserted. Incorrect insertion of the direction is prevented.
[0057]
At this time, the arm portion 12 is pressed by the inclined surface 2a of the assembly claw 2 provided on the rear portion 1a of the housing and elastically deforms outward.
[0058]
When the first inclined surface 5 is inserted until the first inclined surface 5 abuts on the second inclined surface 15a, the positions of the assembly claw 2 and the assembly hole 12a formed in the arm portion 12 match, and the pressing of the arm portion 12 is released. As a result, the arm 12 returns to its original shape, and the assembling claws 2 and the assembling holes 12a are engaged with each other, so that the ultrasonic sensor main body B is attached to the bezel member A (see also FIG. 1).
[0059]
At this time, since the housing front part 1b of the ultrasonic sensor main body B is inserted into the cylindrical body part 10, sufficient holding strength can be obtained.
[0060]
Further, since the arm portion 12 can be elastically deformed, the insertion force when inserting the ultrasonic sensor B does not require a large insertion force.
[0061]
Further, since the first inclined surface 5 and the second inclined surface 15a are in contact with each other, after the ultrasonic sensor main body B is connected and mounted to the bezel member A, the ultrasonic sensor main body B as well as the holding rubber 102 and The ultrasonic microphones 101a and 101b inserted in the holding rubber 102 can be prevented from jumping forward.
[0062]
When removing the ultrasonic sensor B once attached, the maintenance lever 12b at the tip of the arm 12 is grasped, the arm 12 is opened outward, and the engagement between the assembly claw 2 and the assembly hole 12a may be released. Since the shape of the maintenance lever 12b is bent outward, the maintenance lever 12b can be easily grasped.
[0063]
In such an ultrasonic sensor, since the ultrasonic sensor main body B does not pass through the mounting hole Z, the size of the mounting hole Z can be small, the appearance is not conspicuous, and the design of the bumper Y is not spoiled.
[0064]
Also, since the bumper Y does not require a special mounting rib or the like and only needs to drill the mounting hole Z, there is no problem such as sink in molding, and the choice of the mounting location of the ultrasonic sensor is widened.
[0065]
In addition, the bezel member A can be easily mounted by simply inserting the bezel member A into the mounting hole Z and then inserting the ultrasonic sensor main body B into the bezel member. By providing the lever 12b, workability during maintenance is excellent.
[0066]
(Embodiment 2)
The ultrasonic sensor according to the first embodiment is of a type that incorporates two ultrasonic microphones 101a and 101b. However, the ultrasonic sensor according to the present embodiment has one ultrasonic microphone as illustrated in FIGS. This type incorporates only the microphone 101a.
[0067]
Even an ultrasonic sensor including one ultrasonic microphone 101a can be mounted on the bumper Y with the same configuration and mounting method as in the first embodiment as shown in FIG.
[0068]
In this embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0069]
【The invention's effect】
2. The ultrasonic sensor according to claim 1, further comprising: a bezel member provided with fixing means inserted from a front side of the bumper into a mounting hole formed so as to penetrate through the front and back of the bumper of the vehicle, and holding the bumper from the front and back, and an ultrasonic microphone. And the ultrasonic sensor main body is connected and mounted to the bezel member from the back side of the bumper, so there is no need to pass the ultrasonic sensor main body through the mounting hole, so the size of the mounting hole is large. This makes it possible to reduce the size, thereby making the appearance less noticeable and reducing design problems. Further, the bumper does not require a special mounting rib or the like, the bezel member is inserted into the mounting hole from the front side, the bezel member is fixed to the bumper by the fixing means, and the ultrasonic sensor body is connected to the bezel member from the back side. There is an effect that it can be easily attached simply by attaching and attaching.
[0070]
In the ultrasonic sensor according to the second aspect, in the invention according to the first aspect, the bezel member includes a cylindrical body part in which a front part of the ultrasonic sensor main body is inserted from a rear opening, and the body part. A second locking means extending from a rear part of the main body and engaging with first locking means formed at a rear part of the ultrasonic sensor main body protruding from the body part to fix the ultrasonic sensor main body. An elastically deformable arm portion provided with an outer peripheral surface at a front end of the body portion and abutting against a front surface of the bumper, between the outer peripheral surface of the body portion and the inner peripheral surface of the mounting hole. And a fascia portion for blindfolding the gap between the ultrasonic sensor body and the front portion of the ultrasonic sensor main body can be inserted into the cylindrical body portion to obtain a sufficient holding strength. , The ultrasonic sensor main body is connected to the body When inserting does not require high insertion force said arm portions are elastically deformed and that there is an effect that it inconspicuous mounting holes in with the facia portion.
[0071]
An ultrasonic sensor according to a third aspect of the present invention is the ultrasonic sensor according to the second aspect, wherein one of the inner surface of the body portion and the outer surface of the front portion of the ultrasonic sensor body inserted into the body portion has a convex portion. Is formed on the other side, and an erroneous insertion prevention concave portion is formed on the other side to prevent the erroneous insertion in the vertical direction of the ultrasonic sensor main body by being fitted into the convex and concave portions, so that the ultrasonic sensor main body in the vertical There is an effect that it can be prevented.
[0072]
According to a fourth aspect of the present invention, in the ultrasonic sensor according to the second or third aspect, the distal end of the arm portion is bent outward, so that the distal end of the arm portion is easily grasped, and the distal end of the arm portion. The arm portion is opened to the outside, and the ultrasonic sensor body once mounted is removed from the bezel member.
[0073]
According to a fifth aspect of the present invention, in the ultrasonic sensor according to any one of the second to fourth aspects, the ultrasonic sensor main body has a housing having a storage hole opened in a front surface, and the storage hole has a cylindrical shape. The ultrasonic microphone fitted into rubber is housed, and is inclined around the front surface of the ultrasonic microphone facing the outside from the housing hole so as to spread outward from the front side of the ultrasonic microphone toward the opposite side. A first inclined surface is formed from the holding rubber across the housing, and the bezel member has a projecting piece having a second inclined surface in contact with the first inclined surface, the front end of the body portion. After the ultrasonic sensor main body is mounted on the bezel member, the first inclined surface and the second inclined surface come into contact with each other, so that the housing, the holding rubber, Said holding The fitted to arm there is an effect that it is possible to prevent the protrusion of the front of the ultrasonic microphone.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a state in which an ultrasonic sensor according to a first embodiment is mounted on a bumper.
FIG. 2A is a top view of the ultrasonic sensor body according to the first embodiment.
(B) It is a front view of the ultrasonic sensor main body same as the above.
(C) It is a bottom view of the ultrasonic sensor main body same as the above.
(D) It is a side view of the ultrasonic sensor main body same as the above.
FIG. 3A is a top view of the bezel member according to the first embodiment.
(B) It is a front view of the same bezel member.
(C) It is a bottom view of the bezel member same as the above.
(D) It is a rear view of the same bezel member.
(E) It is a side view of the same bezel member.
FIG. 4 is a diagram for explaining a method of attaching the above ultrasonic sensor to a bumper.
FIG. 5A is a front view of a bezel member of the ultrasonic sensor according to the second embodiment.
(B) It is a side sectional view of the bezel member same as the above.
FIG. 6 is a side sectional view of the ultrasonic sensor main body of the above.
FIG. 7 is a side sectional view showing a state where the ultrasonic sensor is attached to a bumper.
FIG. 8 is a diagram showing a state where an ultrasonic sensor is attached to a vehicle.
FIG. 9 is a side sectional view showing a configuration of a conventional ultrasonic sensor.
FIG. 10A is a front view of the same ultrasonic sensor.
(B) It is a figure explaining the method of attaching an ultrasonic sensor same as the above to a bumper.
FIG. 11 is a view for explaining another method for attaching the ultrasonic sensor to the bumper.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 housing 1a housing rear 1b housing front 2 assembling claw 3 receiving hole 4 erroneous insertion preventing convex portion 5 first inclined surface 10 body portion 10a window 11 fascia portion 12 arm portion 12a assembling hole 12b maintenance lever 13 elastic piece 13a Locking claw 14 Notch 15 Protrusion 15a Second inclined surface 101a, 101b Ultrasonic microphone 102 Holding rubber 103 Electronic circuit section A Bezel member B Ultrasonic sensor body Y Bumper Z Mounting hole

Claims (5)

車両のバンパーの表裏に貫通するように穿孔された取付孔にバンパーの表側から挿入されバンパーを表裏から挟持する固定手段を備えたベゼル部材と、超音波マイクを収納した超音波センサ本体とからなり、該超音波センサ本体は前記ベゼル部材にバンパーの裏側から結合装着されてなることを特徴とする超音波センサ。It consists of a bezel member with fixing means inserted from the front side of the bumper into a mounting hole perforated to penetrate the front and back of the vehicle bumper and holding the bumper from the front and back, and an ultrasonic sensor body containing an ultrasonic microphone. An ultrasonic sensor, wherein the ultrasonic sensor main body is mounted on the bezel member from the back side of a bumper. 前記ベゼル部材は、前記超音波センサ本体の前部が後瑞の開口から挿入される筒状の胴体部と、前記胴体部の後瑞部から延設され、前記胴体部から突出する前記超音波センサ本体の後部に形成された第1の係止手段と係合し前記超音波センサ本体を固定する第2の係止手段を備えた弾性変形可能なアーム部と、前記胴体部の前端の外周縁に沿って設けられ前記バンパーの表側の面と当接して前記胴体部の外周面と取付孔の内周面との間の隙間を目隠しするフェーシャ部とを備えたことを特徴とする請求項1記載の超音波センサ。The bezel member includes a cylindrical body portion in which a front portion of the ultrasonic sensor body is inserted from a rear opening, and the ultrasonic wave extending from the rear portion of the body portion and projecting from the body portion. An elastically deformable arm having second locking means for engaging the first locking means formed at the rear part of the sensor main body and fixing the ultrasonic sensor main body; A fascia portion provided along a peripheral edge and abutting on a surface on the front side of the bumper to cover a gap between an outer peripheral surface of the body portion and an inner peripheral surface of the mounting hole. 2. The ultrasonic sensor according to 1. 前記胴体部の内面と前記胴体部に挿入される前記超音波センサ本体の前部の外面とのうち何れか一方に凸部を形成し、他方に前記凸部と凹凸嵌合し前記超音波センサ本体の上下方向の誤挿入を防止する誤挿入防止用凹部を形成したことを特徴とする請求項2記載の超音波センサ。A projection is formed on one of an inner surface of the body portion and an outer surface of a front portion of the ultrasonic sensor main body inserted into the body portion, and the other end of the ultrasonic sensor is fitted with the projection portion. 3. The ultrasonic sensor according to claim 2, wherein an erroneous insertion preventing recess for preventing erroneous insertion of the main body in a vertical direction is formed. 前記アーム部の先端を外側に屈曲した形状としたことを特徴とする請求項2又は3記載の超音波センサ。4. The ultrasonic sensor according to claim 2, wherein a tip of the arm is bent outward. 前記超音波センサ本体は、前面に収納孔が開口したハウジングを有し、前記収納孔に筒状の保持ゴムに嵌め込まれた前記超音波マイクが収納され、前記収納孔から外部に臨んだ前記超音波マイクの前面の周囲に、前記超音波マイクの前面側から反対側へ向かうにつれて外側に広がるように傾斜する第1の傾斜面が、前記保持ゴムから前記ハウジングに跨って形成され、前記ベゼル部材は、前記第1の傾斜面と当接する第2の傾斜面を有する突片が、前記胴体部の前端の開口に形成されたことを特徴とする請求項2乃至4の何れか記載の超音波センサ。The ultrasonic sensor main body has a housing with a storage hole opened in the front surface, the ultrasonic microphone fitted in a cylindrical holding rubber is stored in the storage hole, and the ultrasonic microphone facing outside from the storage hole is housed. A first inclined surface is formed around the front surface of the ultrasonic microphone so as to extend outward from the front side of the ultrasonic microphone toward the opposite side and extends from the holding rubber to the housing. The ultrasonic wave according to any one of claims 2 to 4, wherein a protruding piece having a second inclined surface that is in contact with the first inclined surface is formed at an opening at a front end of the body portion. Sensors.
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