JP2017175291A - Ultrasonic sensor - Google Patents

Ultrasonic sensor Download PDF

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JP2017175291A
JP2017175291A JP2016057505A JP2016057505A JP2017175291A JP 2017175291 A JP2017175291 A JP 2017175291A JP 2016057505 A JP2016057505 A JP 2016057505A JP 2016057505 A JP2016057505 A JP 2016057505A JP 2017175291 A JP2017175291 A JP 2017175291A
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elastic member
ultrasonic sensor
vibrating body
cylindrical
side end
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JP6593236B2 (en
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兼史 深堀
Kenji Fukabori
兼史 深堀
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Denso Corp
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Denso Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic sensor that is able to restrict noise that may occur due to a leak of ultrasonic wave.SOLUTION: An ultrasonic sensor 10 comprises: a vibrator 50 that has on its front face a transmission/reception face 11 that transmits/receives an ultrasonic wave and has thickness extending from its front face to its rear face; a first cylindrical elastic member 70 surrounding an outside face on the front face side of the vibrator 50, and whose inside face abuts on its outside face; a second cylindrical elastic member 40 surrounding the outside face on the rear face side of the vibrator 50, whose inside face abuts on its outside face, and which, on its front face side, abuts on the first elastic member 70; and a case 30 having a cylindrical side wall part 34 accommodating the vibrator 50 and the second elastic member 40 and harder than the first elastic member 70 and the second elastic member 40. The first elastic member 70 abuts on a front-face-side end part 35 of the side wall part 34 from the front face side while kept compressed in a thickness direction of the vibrator 50.SELECTED DRAWING: Figure 12

Description

本発明は、超音波センサに関する。   The present invention relates to an ultrasonic sensor.

従来、車両のバンパ等に設けられた超音波センサにより車両と車両周囲の物体との距離を検知し、車両と物体との衝突を回避する制御が行われている。   Conventionally, an ultrasonic sensor provided in a bumper or the like of a vehicle detects a distance between the vehicle and an object around the vehicle, and controls to avoid a collision between the vehicle and the object.

このような超音波センサとして、特許文献１に記載の超音波センサがある。特許文献１に記載の超音波センサは、超音波を送受信する送受信面を有する振動体と、振動体の外側面を囲む筒状の弾性部材と、振動体及び弾性部材を収容する収容部を備える本体部と、弾性部材を囲むようにして設けられ、取付対象物の表側に当接した状態で前記本体部に組み付けられる環状体と、を備え、取付対象物を貫通した状態でその取付対象物に取り付けられる。   There exists an ultrasonic sensor of patent document 1 as such an ultrasonic sensor. The ultrasonic sensor described in Patent Literature 1 includes a vibrating body having a transmission / reception surface that transmits and receives ultrasonic waves, a cylindrical elastic member that surrounds the outer surface of the vibrating body, and a storage unit that stores the vibrating body and the elastic member. A main body portion and an annular body that is provided so as to surround the elastic member and is assembled to the main body portion in contact with the front side of the attachment object, and is attached to the attachment object in a state of penetrating the attachment object It is done.

弾性部材は、筒状弾性体と底部弾性体との２部材に分割されており、筒状弾性体の色を取付対象物であるバンパの色と等しくすることにより、意匠性を向上させることができる。   The elastic member is divided into two members, a cylindrical elastic body and a bottom elastic body. By making the color of the cylindrical elastic body equal to the color of the bumper that is an attachment object, the design can be improved. it can.

特開２００２−１９９４８２号公報JP 2002-199482 A

特許文献１のごとく、筒状弾性体を２部材とする場合、その２部材の間に隙間が生ずれば、その隙間から超音波の漏れが生ずる。超音波の漏れが生ずれば、その漏れた超音波が周囲の物体等により反射され、超音波センサの送受波面へ到達することが起こる。その結果として、過剰なノイズが検出され、その結果として物体との距離の誤検知が生ずるおそれがある。   When the cylindrical elastic body is made up of two members as in Patent Document 1, if a gap is formed between the two members, ultrasonic waves leak from the gap. If the leakage of the ultrasonic wave occurs, the leaked ultrasonic wave is reflected by a surrounding object or the like and reaches the transmission / reception surface of the ultrasonic sensor. As a result, excessive noise is detected, and as a result, erroneous detection of the distance to the object may occur.

本発明は、上記課題を解決するためになされたものであり、その主たる目的は、超音波の漏れによって発生するノイズを抑制することができる超音波センサを提供することにある。   The present invention has been made to solve the above-described problems, and a main object thereof is to provide an ultrasonic sensor that can suppress noise generated by leakage of ultrasonic waves.

第１の発明は、超音波センサであって、超音波を送受信する送受信面を正面に有し、正面から裏面側に延びる厚みを有する振動体と、振動体の、正面側の外側面を囲み、その外側面に内側面が当接する筒状の第１弾性部材と、振動体の、裏面側の外側面を囲み、その外側面に内側面が当接し、且つ、第１弾性部材と正面側で当接する筒状の第２弾性部材と、振動体及び第２弾性部材を収容する筒状の側壁部を有し、第１弾性部材及び第２弾性部材よりも硬質であるケースと、を備え、第１弾性部材は、振動体の厚み方向に圧縮された状態で正面側から側壁部の正面側端部に当接している。   1st invention is an ultrasonic sensor, Comprising: The vibrating body which has the transmission / reception surface which transmits / receives an ultrasonic wave in the front, has the thickness extended from a front surface to a back surface side, and the outer surface of the front side of a vibrating body is enclosed The cylindrical first elastic member whose inner surface abuts on its outer surface and the outer surface on the back surface side of the vibrating body, the inner surface abuts on the outer surface, and the first elastic member and the front side A cylindrical second elastic member that comes into contact with the first elastic member and a case that has a cylindrical side wall that accommodates the vibrating body and the second elastic member, and is harder than the first elastic member and the second elastic member. The first elastic member is in contact with the front side end portion of the side wall portion from the front side in a state compressed in the thickness direction of the vibrating body.

上記構成では、第１弾性部材は圧縮され弾性変形した状態で、側壁部に正面側へ当接するため、第１弾性部材と側壁部は密着する。これにより、振動体の側面から生じた超音波が、第１弾性部材と側壁部との間を通って超音波センサの外部への漏れを抑制でき、それによって発生するノイズを抑制することができる。   In the above configuration, since the first elastic member is compressed and elastically deformed, the first elastic member comes into contact with the side wall portion to the front side, so that the first elastic member and the side wall portion are in close contact with each other. Thereby, the ultrasonic wave generated from the side surface of the vibrating body can be prevented from leaking to the outside of the ultrasonic sensor through the space between the first elastic member and the side wall portion, and noise generated thereby can be suppressed. .

第２の発明は、超音波センサであって、超音波を送受信する送受信面を正面に有し、正面から裏面方向に延びる厚みを有する振動体と、振動体の、正面側の外側面を囲み、その外側面に内側面が当接する筒状の第１弾性部材と、振動体の、裏面側の外側面を囲み、その外側面に内側面が当接し、且つ、第１弾性部材と正面側で当接する筒状の第２弾性部材と、振動体及び第２弾性部材を収容する筒状の側壁部を有し、第１弾性部材及び第２弾性部材よりも硬質であるケースと、を備え、第１弾性部材及び第２弾性部材において、互いに対向する各端面には、凹面及び凸面の少なくともいずれかがそれぞれ形成されている。   The second invention is an ultrasonic sensor, and has a transmitting / receiving surface for transmitting / receiving ultrasonic waves on the front surface, and a vibrating body having a thickness extending from the front surface to the back surface, and an outer surface on the front side of the vibrating body. The cylindrical first elastic member whose inner surface abuts on its outer surface and the outer surface on the back surface side of the vibrating body, the inner surface abuts on the outer surface, and the first elastic member and the front side A cylindrical second elastic member that comes into contact with the first elastic member and a case that has a cylindrical side wall that accommodates the vibrating body and the second elastic member, and is harder than the first elastic member and the second elastic member. In each of the first elastic member and the second elastic member, at least one of a concave surface and a convex surface is formed on each end surface facing each other.

上記構成では、第１弾性部材と第２弾性部材との当接面に凹凸を設けているため、振動体の側面から生じた超音波が、直線的に抜ける経路がない。したがって、第１弾性部材と第２弾性部材との間からの超音波の漏れを抑制でき、それによって発生するノイズを抑制することができる。   In the above configuration, since the unevenness is provided on the contact surface between the first elastic member and the second elastic member, there is no path through which the ultrasonic wave generated from the side surface of the vibrating body passes straight. Therefore, leakage of ultrasonic waves from between the first elastic member and the second elastic member can be suppressed, and noise generated thereby can be suppressed.

超音波センサの斜視図である。It is a perspective view of an ultrasonic sensor. 超音波センサの分解斜視図である。It is a disassembled perspective view of an ultrasonic sensor. 本体部材の正面図である。It is a front view of a main-body member. 本体部材の上面図である。It is a top view of a main body member. 本体部材の断面図である。It is sectional drawing of a main-body member. 第１弾性部材の正面図である。It is a front view of the 1st elastic member. 第１弾性部材の上面図である。It is a top view of the 1st elastic member. 第１弾性部材の断面図である。It is sectional drawing of a 1st elastic member. リテーナの正面図である。It is a front view of a retainer. リテーナの上面図である。It is a top view of a retainer. リテーナの断面図である。It is sectional drawing of a retainer. 超音波センサの断面図である。It is sectional drawing of an ultrasonic sensor. 第１弾性部材のフランジ部周囲の拡大図である。It is an enlarged view around the flange part of the 1st elastic member. 第２実施形態における、第１弾性部材の周囲の拡大図である。It is an enlarged view around the 1st elastic member in a 2nd embodiment. 第３実施形態における、第１弾性部材の周囲の拡大図である。It is an enlarged view around the 1st elastic member in a 3rd embodiment. 第４実施形態における、第１弾性部材の周囲の拡大図である。It is an enlarged view around the 1st elastic member in a 4th embodiment. 第５実施形態における、第１弾性部材の周囲の拡大図である。It is an enlarged view around the 1st elastic member in a 5th embodiment. 第６実施形態における、第１弾性部材の周囲の拡大図である。It is an enlarged view around the 1st elastic member in a 6th embodiment. 第７実施形態における、第１弾性部材の周囲の拡大図である。It is an enlarged view around the 1st elastic member in a 7th embodiment.

以下、本発明の実施形態について図に基づいて説明する。なお、以下の各実施形態相互において、互いに同一もしくは均等である部分には、図中、同一符号を付してある。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

＜第１実施形態＞
本実施形態の第１実施形態にかかる超音波センサについて説明する。本実施形態に係る超音波センサは、車両のバンパに取り付けられ、送受信面により超音波の送受信を行い、車両周囲の物体の検知用いられる。 <First Embodiment>
The ultrasonic sensor according to the first embodiment of the present embodiment will be described. The ultrasonic sensor according to the present embodiment is attached to a bumper of a vehicle, transmits and receives ultrasonic waves using a transmission / reception surface, and is used to detect objects around the vehicle.

図１は、本実施形態に係る超音波センサ１０の斜視図である。超音波センサ１０は、送受信面１１が外部に露出するように、取付対象物であるバンパの裏側から取り付けられる。このとき、バンパの裏面に取付面１２が当接する。なお、本実施形態において、送受信面１１が設けられる側を正面とし、正面の反対側の面を裏面とし、取付対象物に取り付けられた際の地面側の面を下面とし、下面の反対側の面を上面としている。   FIG. 1 is a perspective view of an ultrasonic sensor 10 according to the present embodiment. The ultrasonic sensor 10 is attached from the back side of the bumper which is an attachment object so that the transmission / reception surface 11 is exposed to the outside. At this time, the mounting surface 12 contacts the back surface of the bumper. In this embodiment, the side on which the transmission / reception surface 11 is provided is the front surface, the surface opposite to the front surface is the back surface, the surface on the ground side when attached to the attachment object is the lower surface, and the surface on the opposite side of the lower surface The surface is the top surface.

超音波センサ１０の全体構成について、図２の分解斜視図を参照して説明する。超音波センサ１０は、送受信面１１が外部に露出するように設けられた本体部材２０と、その送受信面１１の周囲を囲うように設けられる第１弾性部材７０と、本体部材２０を囲うように設けられるリテーナ８０により構成される。   The overall configuration of the ultrasonic sensor 10 will be described with reference to the exploded perspective view of FIG. The ultrasonic sensor 10 surrounds the main body member 20 provided so that the transmission / reception surface 11 is exposed to the outside, a first elastic member 70 provided so as to surround the transmission / reception surface 11, and the main body member 20. The retainer 80 is provided.

超音波センサ１０の本体部材２０について、図２〜５を参照して説明する。本体部材２０を構成するケース３０は、硬質の樹脂、例えばポリプロピレンで形成されている。ケース３０の形状は中空の略直方体であり、ケース３０の上面及び下面には、それぞれ、凸形状の係止部３１が設けられている。係止部３１は、正面側から高さが漸増する形状であり、裏面側端部３２は、裏面に対して略水平となっている。ケース３０の左側面には、コネクタ３３が形成されており、超音波センサ１０は、このコネクタ３３を介して他の機器と接続可能とされている。   The main body member 20 of the ultrasonic sensor 10 will be described with reference to FIGS. The case 30 constituting the main body member 20 is formed of a hard resin, for example, polypropylene. The shape of the case 30 is a hollow, substantially rectangular parallelepiped, and convex locking portions 31 are provided on the upper and lower surfaces of the case 30, respectively. The locking part 31 has a shape that gradually increases in height from the front side, and the back side end part 32 is substantially horizontal to the back side. A connector 33 is formed on the left side surface of the case 30, and the ultrasonic sensor 10 can be connected to other devices via the connector 33.

ケース３０の正面には、正面側の端部が開口した円筒形の側壁部３４が設けられている。側壁部３４の正面側端部３５をなす面は、正面に対して水平な面である。この側壁部３４の内側には、正面側端部３５から所定距離離間した位置に、狭径した円環状の内側フランジ３６が形成されている。その内側フランジ３６の正面側の面である表側面３７は、正面に対して水平な面である。   On the front surface of the case 30, a cylindrical side wall portion 34 having an opening on the front side is provided. The surface forming the front side end portion 35 of the side wall portion 34 is a surface horizontal to the front surface. A narrow annular inner flange 36 is formed inside the side wall portion 34 at a position spaced a predetermined distance from the front side end portion 35. A front side surface 37 that is a surface on the front side of the inner flange 36 is a surface horizontal to the front surface.

側壁部３４の内部には、円筒形の第２弾性部材４０が収容されている。この第２弾性部材４０は、弾性を有する樹脂、例えばシリコーンゴムで形成されている。第２弾性部材４０の外径は、側壁部３４の内径と略等しく形成されており、第２弾性部材４０が側壁部３４へ収容された際、側壁部３４の内側面と第２弾性部材４０の外側面が当接する。   A cylindrical second elastic member 40 is accommodated in the side wall portion 34. The second elastic member 40 is formed of an elastic resin, for example, silicone rubber. The outer diameter of the second elastic member 40 is formed substantially equal to the inner diameter of the side wall portion 34, and when the second elastic member 40 is accommodated in the side wall portion 34, the inner surface of the side wall portion 34 and the second elastic member 40. The outer surface of the abuts.

第２弾性部材４０の裏面側端部４１をなす面、及び、正面側端部４２をなす面は、いずれも正面に対して水平な面である。第２弾性部材４０の表裏方向の長さ、すなわち、正面側端部４２と裏面側端部４１との間の長さは、側壁部３４の正面側端部３５と、内側フランジ３６の表側面３７との間の長さと略等しく形成されている。したがって、第２弾性部材４０が側壁部３４に収容された際に、第２弾性部材４０の裏面側端部４１が側壁部３４の内側フランジ３６の表側面３７に当接し、且つ、第２弾性部材４０の正面側端部４２と側壁部３４の正面側端部３５とは略面一となる。   The surface forming the back surface side end portion 41 of the second elastic member 40 and the surface forming the front surface side end portion 42 are both horizontal with respect to the front surface. The length in the front-back direction of the second elastic member 40, that is, the length between the front-side end portion 42 and the back-side end portion 41 is the front-side end portion 35 of the side wall portion 34 and the front side surface of the inner flange 36. 37 and substantially the same length as 37. Therefore, when the second elastic member 40 is accommodated in the side wall portion 34, the back surface side end portion 41 of the second elastic member 40 abuts on the front side surface 37 of the inner flange 36 of the side wall portion 34, and the second elasticity The front end 42 of the member 40 and the front end 35 of the side wall 34 are substantially flush.

第２弾性部材４０の内側面には、正面側端部４２及び裏面側端部４１のいずれからも離間した中央近傍に、狭径した円環状の内側フランジ４３が設けられている。その内側フランジ４３の正面側の面である表側面４４は、正面に対して水平な面である。   On the inner side surface of the second elastic member 40, an annular inner flange 43 having a narrow diameter is provided in the vicinity of the center separated from both the front side end portion 42 and the back side end portion 41. A front side surface 44 which is a surface on the front side of the inner flange 43 is a surface horizontal to the front surface.

第２弾性部材４０の内側フランジ４３の内周面には、円盤形状の発泡弾性体４５が挟持されている。発泡弾性体４５の直径は、第２弾性部材４０の内側フランジ４３の内径と略等しくされている。すなわち、第２弾性部材４０の内側フランジ４３の内周面と発泡弾性体４５の外周面とが当接している。第２弾性部材４０の内側フランジ４３と発泡弾性体４５と４５により、ケース３０の内部において、正面側の部分と裏面側の部分とが区画されている。   A disc-shaped foamed elastic body 45 is sandwiched between the inner peripheral surfaces of the inner flange 43 of the second elastic member 40. The diameter of the foamed elastic body 45 is substantially equal to the inner diameter of the inner flange 43 of the second elastic member 40. That is, the inner peripheral surface of the inner flange 43 of the second elastic member 40 is in contact with the outer peripheral surface of the foamed elastic body 45. The inside flange 43 of the second elastic member 40 and the foamed elastic bodies 45 and 45 divide the front side portion and the back side portion inside the case 30.

第２弾性部材４０の内部の正面側には、正面側が閉口した有底円筒形の振動体５０が収容されている。振動体５０は、導電性材料、例えばアルミニウムで形成されている。振動体５０は有底円筒状とされることで、その内部に内部空間５１が形成されている。   On the front side inside the second elastic member 40, a bottomed cylindrical vibrating body 50 whose front side is closed is accommodated. The vibrating body 50 is made of a conductive material such as aluminum. The vibrating body 50 has a bottomed cylindrical shape, and an internal space 51 is formed therein.

振動体５０の外径は、第２弾性部材４０の内径と略等しく形成されている。したがって、振動体５０の側面５２の外側は、第２弾性部材４０の内側面に当接する。   The outer diameter of the vibrating body 50 is formed substantially equal to the inner diameter of the second elastic member 40. Therefore, the outer side of the side surface 52 of the vibrating body 50 abuts on the inner side surface of the second elastic member 40.

振動体５０の側面５２の裏面側端部５３をなす面は、正面に対して水平な面である。振動体５０が第２弾性部材４０に収容された際に、振動体５０の側面５２の裏面側端部５３は、第２弾性部材４０の内側フランジ４３の表側面４４に当接する。振動体５０の正面方向の長さ、すなわち、側面５２の裏面側端部５３から底部５４の外面までの長さは、第２弾性部材４０の正面側端部４２から内側フランジ４３の表側面４４までの長さよりも、長い。したがって、振動体５０が第２弾性部材４０に収容された際に、振動体５０の正面側の一部が、第２弾性部材４０の正面側端部４２及びケース３０の側壁部３４の正面側端部３５により規定される面よりも突出する。   The surface forming the back surface side end portion 53 of the side surface 52 of the vibrating body 50 is a surface that is horizontal with respect to the front surface. When the vibrating body 50 is accommodated in the second elastic member 40, the back surface side end portion 53 of the side surface 52 of the vibrating body 50 contacts the front side surface 44 of the inner flange 43 of the second elastic member 40. The length in the front direction of the vibrating body 50, that is, the length from the back surface side end portion 53 of the side surface 52 to the outer surface of the bottom portion 54, is the front side surface 44 of the inner flange 43 from the front side end portion 42 of the second elastic member 40. Longer than the length. Therefore, when the vibrating body 50 is accommodated in the second elastic member 40, a part of the front side of the vibrating body 50 is the front side of the front side end portion 42 of the second elastic member 40 and the side wall portion 34 of the case 30. It protrudes beyond the surface defined by the end 35.

振動体５０の底部５４の内面に圧電素子５５が貼着されており、この底部５４の外側正面が送受信面１１となっている。圧電素子５５は、圧電セラミックス、例えばチタン酸ジルコン酸鉛系セラミックスで形成されており、その表裏両面に電極を備えている。圧電素子５５の一方の電極は、リード５６ａによって一対の接続ピン５７の一方に電気的に接続されている。この接続ピン５７は、導電性材料、例えば銅で形成されている。圧電素子５５の他方の電極は、振動体５０の底部５４に導電性接着剤により貼着されている。振動体５０の側面５２の内面はリード５６ｂによって接続ピン５７の他方に接続されている。これにより、圧電素子５５の他方の電極は、振動体５０及びリード５６ｂを介して接続ピン５７の他方に電気的に接続されている。なお、振動体５０の内部空間５１には、防振材、例えば、シリコーンゴムが充填されており、送受信面１１から接続ピン５７に伝達される不要振動が抑制される。   A piezoelectric element 55 is attached to the inner surface of the bottom portion 54 of the vibrating body 50, and the outer front surface of the bottom portion 54 is the transmission / reception surface 11. The piezoelectric element 55 is made of piezoelectric ceramics, for example, lead zirconate titanate ceramics, and has electrodes on both front and back surfaces. One electrode of the piezoelectric element 55 is electrically connected to one of the pair of connection pins 57 by a lead 56a. The connection pin 57 is made of a conductive material such as copper. The other electrode of the piezoelectric element 55 is attached to the bottom 54 of the vibrating body 50 with a conductive adhesive. The inner surface of the side surface 52 of the vibrating body 50 is connected to the other end of the connection pin 57 by a lead 56b. As a result, the other electrode of the piezoelectric element 55 is electrically connected to the other of the connection pins 57 via the vibrating body 50 and the lead 56b. The internal space 51 of the vibrating body 50 is filled with a vibration isolating material, for example, silicone rubber, so that unnecessary vibration transmitted from the transmission / reception surface 11 to the connection pin 57 is suppressed.

接続ピン５７は、発泡弾性体４５を貫通しており、ケース３０内の空間に収容された回路基板５８に接続されている。この回路基板５８が収容される空間には、防水樹脂５９、例えばウレタン樹脂が充填されている。   The connection pin 57 passes through the foamed elastic body 45 and is connected to the circuit board 58 accommodated in the space in the case 30. A space in which the circuit board 58 is accommodated is filled with a waterproof resin 59, for example, a urethane resin.

続いて、第１弾性部材７０について、図２、及び図６〜８を参照して説明する。第１弾性部材７０は、第２弾性部材４０と同様に、弾性を有する樹脂、例えばシリコーンゴムにより形成されている。   Next, the first elastic member 70 will be described with reference to FIG. 2 and FIGS. Similar to the second elastic member 40, the first elastic member 70 is made of an elastic resin, such as silicone rubber.

第１弾性部材７０は、円筒形の筒状部７１と、その筒状部７１の裏面側の端に設けられたフランジ部７２とを備えている。フランジ部７２は、筒状部７１よりも拡径されたものであり、円環状である。   The first elastic member 70 includes a cylindrical tubular portion 71 and a flange portion 72 provided at an end on the back surface side of the tubular portion 71. The flange portion 72 has a larger diameter than the cylindrical portion 71 and has an annular shape.

第１弾性部材７０の筒状部７１の表裏方向の高さは、振動体５０の表裏方向の高さと、第２弾性部材４０の内側フランジ４３の表側面４４と正面側端部４２との間の高さとの差と、略等しい。第１弾性部材７０の筒状部７１の外径は、第２弾性部材４０の外径と略等しい。フランジ部７２の外径はケース３０の側壁部３４の外径と略等しい。   The height in the front and back direction of the cylindrical portion 71 of the first elastic member 70 is between the height in the front and back direction of the vibrating body 50 and the front side surface 44 and the front side end portion 42 of the inner flange 43 of the second elastic member 40. Is almost equal to the difference in height. The outer diameter of the cylindrical portion 71 of the first elastic member 70 is substantially equal to the outer diameter of the second elastic member 40. The outer diameter of the flange portion 72 is substantially equal to the outer diameter of the side wall portion 34 of the case 30.

第１弾性部材７０の筒状部７１の内周面には、環状に拡径された凹部７３が設けられている。本実施形態では、凹部７３を所定間隔を開けて２つ設けるものとしている。これら凹部７３が設けられることにより、凹部７３の間と、正面側端部７５及び裏面側端部７７には、凹部７３よりも内径が小さい凸部７４が設けられるといえる。この凸部７４間の内径は、振動体５０の外径と略等しくされている。したがって、第１弾性部材７０に振動体５０が収容されれば、振動体５０の側面５２の外面に、第１弾性部材７０の内周面の凸部７４が当接することとなる。   On the inner peripheral surface of the cylindrical portion 71 of the first elastic member 70, a concave portion 73 having an annular diameter is provided. In the present embodiment, two recesses 73 are provided at predetermined intervals. By providing these concave portions 73, it can be said that convex portions 74 having an inner diameter smaller than that of the concave portions 73 are provided between the concave portions 73 and between the front side end portion 75 and the back surface side end portion 77. The inner diameter between the convex portions 74 is substantially equal to the outer diameter of the vibrating body 50. Therefore, when the vibrating body 50 is accommodated in the first elastic member 70, the convex portion 74 on the inner peripheral surface of the first elastic member 70 comes into contact with the outer surface of the side surface 52 of the vibrating body 50.

第１弾性部材７０の筒状部７１の正面側端部７５をなす面と、フランジ部７２の正面側面７６は、いずれも、正面に対して水平な面である。第１弾性部材７０の筒状部７１の裏面側端部７７をなす面と、フランジ部７２の裏側面７８は、いずれも、正面に対して水平な面である。したがって、筒状部７１の裏面側端部７７をなす面と、フランジ部７２の裏側面７８とは、面一である。   The surface forming the front side end portion 75 of the cylindrical portion 71 of the first elastic member 70 and the front side surface 76 of the flange portion 72 are both horizontal with respect to the front surface. The surface forming the back surface side end portion 77 of the cylindrical portion 71 of the first elastic member 70 and the back side surface 78 of the flange portion 72 are both surfaces that are horizontal with respect to the front surface. Therefore, the surface forming the back surface side end portion 77 of the tubular portion 71 and the back side surface 78 of the flange portion 72 are flush with each other.

続いて、リテーナ８０について、図２、及び図９〜１１を参照して説明する。リテーナ８０は、硬質の樹脂、例えばポリプロピレンで形成されている。リテーナ８０には、本体部材２０の側壁部３４を収容する円筒形の開口８１が設けられている。この開口８１の周囲の正面側には、正面に水平な面である取付面１２が設けられている。取付面１２は、正面から見て、上下方向よりも、その上下方向に直交する左右方向のほうが長い。すなわち、取付面１２の外形は、略長方形である。   Next, the retainer 80 will be described with reference to FIG. 2 and FIGS. The retainer 80 is made of a hard resin such as polypropylene. The retainer 80 is provided with a cylindrical opening 81 that accommodates the side wall portion 34 of the main body member 20. On the front side around the opening 81, a mounting surface 12 that is a horizontal surface on the front is provided. The attachment surface 12 is longer in the left-right direction perpendicular to the vertical direction than in the vertical direction when viewed from the front. That is, the outer shape of the mounting surface 12 is substantially rectangular.

取付面１２の裏側において、開口８１の上側と下側には、それぞれ、正面側から裏面側へと延びる平板形状の係止部材８２が設けられている。この係止部材８２により開口８１が上下方向から挟まれている。係止部材８２には係止穴８３が設けられている。係止穴８３は、正面方向について、裏側端面８４と表側端面８５とにより区画されている。これら裏側端面８４及び表側端面８５は、いずれも正面に対して水平な面である。すなわち、裏側端面８４と表側端面８５とは平行な面である。この係止穴８３とケース３０の係止部３１とが係合することにより、本体部材２０とリテーナ８０とが嵌め合せられる。   On the back side of the mounting surface 12, flat-plate-shaped locking members 82 extending from the front side to the back side are provided on the upper side and the lower side of the opening 81, respectively. The opening 81 is sandwiched by the locking member 82 from above and below. A locking hole 83 is provided in the locking member 82. The locking hole 83 is partitioned by a back end face 84 and a front end face 85 in the front direction. The back side end surface 84 and the front side end surface 85 are both horizontal with respect to the front surface. That is, the back side end surface 84 and the front side end surface 85 are parallel surfaces. The main body member 20 and the retainer 80 are fitted together by the engagement between the engagement hole 83 and the engagement portion 31 of the case 30.

開口８１の上側に設けられた係止部材８２の上側、及び、開口８１の下側に設けられた係止部材８２の下側には、それぞれ操作部材８６が一体に設けられている。操作部材８６が変位させられることで、その変位に連動して係止部材８２が変位する。   Operation members 86 are integrally provided on the upper side of the locking member 82 provided on the upper side of the opening 81 and on the lower side of the locking member 82 provided on the lower side of the opening 81, respectively. When the operation member 86 is displaced, the locking member 82 is displaced in conjunction with the displacement.

開口８１の正面側の端部には、狭径した円環状の内側フランジ８７が設けられている。内側フランジ８７の内径は、ケース３０の側壁部３４の内径よりも大きく、且つ、ケース３０の側壁部３４の外径よりも小さい。リテーナ８０の内側フランジ８７の裏側面８８は、正面に対して水平な面である。   A narrow annular inner flange 87 is provided at the front end of the opening 81. The inner diameter of the inner flange 87 is larger than the inner diameter of the side wall portion 34 of the case 30 and smaller than the outer diameter of the side wall portion 34 of the case 30. The back side surface 88 of the inner flange 87 of the retainer 80 is a surface horizontal to the front surface.

リテーナ８０の内側フランジ８７の裏側面８８と、リテーナ８０の係止穴８３の裏側端面８４との正面方向の長さは、ケース３０の側壁部３４の正面側端部３５から係止部３１の裏面側端部３２までの長さよりも、大きい。加えて、リテーナ８０の内側フランジ８７の裏側面８８と、リテーナ８０の係止穴８３の裏側端面８４との正面方向の長さは、ケース３０の側壁部３４の正面側端部３５から係止部３１の裏面側端部３２までの長さに第１弾性部材７０の厚みを加えた長さよりも、小さい。   The length in the front direction of the back side surface 88 of the inner flange 87 of the retainer 80 and the back side end surface 84 of the locking hole 83 of the retainer 80 is determined from the front side end portion 35 of the side wall portion 34 of the case 30 to the locking portion 31. It is larger than the length to the back side end 32. In addition, the length in the front direction of the back side surface 88 of the inner flange 87 of the retainer 80 and the back side end surface 84 of the locking hole 83 of the retainer 80 is locked from the front side end portion 35 of the side wall portion 34 of the case 30. It is smaller than the length obtained by adding the thickness of the first elastic member 70 to the length of the back surface side end portion 32 of the portion 31.

以上のように構成される本体部材２０、第１弾性部材７０及びリテーナ８０を組み合わせて超音波センサ１０とし、その超音波センサ１０を車両のバンパ９０に設けられた円形の開口部９１に取り付けられた場合の断面を、図１２を参照して説明する。   The main body member 20, the first elastic member 70, and the retainer 80 configured as described above are combined to form the ultrasonic sensor 10, and the ultrasonic sensor 10 is attached to a circular opening 91 provided in the bumper 90 of the vehicle. A cross section in the case of the above will be described with reference to FIG.

第１弾性部材７０は、本体部材２０の振動体５０の周囲を覆うように取り付けられる。第１弾性部材７０の筒状部７１の内周面に設けられた凸部７４が、振動体５０の側面５２に当接する。また、第１弾性部材７０の筒状部７１の内周面の凹部７３と、振動体５０の側面５２との間には、空隙が形成される。   The first elastic member 70 is attached so as to cover the periphery of the vibrating body 50 of the main body member 20. A convex portion 74 provided on the inner peripheral surface of the cylindrical portion 71 of the first elastic member 70 contacts the side surface 52 of the vibrating body 50. Further, a gap is formed between the concave portion 73 on the inner peripheral surface of the cylindrical portion 71 of the first elastic member 70 and the side surface 52 of the vibrating body 50.

第１弾性部材７０の筒状部７１の裏面側端部７７は、第２弾性部材４０の正面側端部４２に当接する。第１弾性部材７０のフランジ部７２の裏側面７８は、ケース３０の側壁部３４の正面側端部３５に当接する。   The rear surface side end 77 of the cylindrical portion 71 of the first elastic member 70 contacts the front side end 42 of the second elastic member 40. The back side surface 78 of the flange portion 72 of the first elastic member 70 contacts the front side end portion 35 of the side wall portion 34 of the case 30.

このようにして本体部材２０に第１弾性部材７０が取り付けられたうえで、本体部材２０及び第１弾性部材７０に対して、リテーナ８０が取り付けられる。リテーナ８０の係止部材８２に設けられた係止穴８３には、ケース３０の係止部３１が嵌合する。このとき、係止穴８３の裏側端面８４と、係止部３１の裏面側端部３２が当接する。   In this way, after the first elastic member 70 is attached to the main body member 20, the retainer 80 is attached to the main body member 20 and the first elastic member 70. The locking portion 31 of the case 30 is fitted into the locking hole 83 provided in the locking member 82 of the retainer 80. At this time, the back-side end surface 84 of the locking hole 83 and the back-side end 32 of the locking portion 31 abut.

一方、リテーナ８０の内側フランジ８７の裏側面８８は、第１弾性部材７０のフランジの正面側面７６に当接する。この、リテーナ８０の内側フランジ８７の裏側面８８と、第１弾性部材７０のフランジの正面側面７６との当接部分について、図１３の拡大図を参照して説明する。   On the other hand, the back side surface 88 of the inner flange 87 of the retainer 80 abuts on the front side surface 76 of the flange of the first elastic member 70. A contact portion between the rear side surface 88 of the inner flange 87 of the retainer 80 and the front side surface 76 of the flange of the first elastic member 70 will be described with reference to an enlarged view of FIG.

上述した通り、リテーナ８０の内側フランジ８７の裏側面８８と、リテーナ８０の係止穴８３の裏側端面８４との正面方向の長さは、ケース３０の側壁部３４の正面側端部３５から係止部３１の裏面側端部３２までの長さに第１弾性部材７０のフランジ部７２の厚みを加えた長さよりも、小さい。したがって、硬質の樹脂で形成されたリテーナ８０の内側フランジ８７の裏側面８８と、硬質の樹脂で形成されたケース３０の側壁部３４の正面側端部３５とにより挟まれた第１弾性部材７０のフランジ部７２は、表裏方向へと圧縮され、弾性変形する。これにより、第１弾性部材７０のフランジ部７２の裏側面７８と、ケース３０の側壁部３４の正面側端部３５とが密着することとなる。   As described above, the length in the front direction between the back side surface 88 of the inner flange 87 of the retainer 80 and the back side end surface 84 of the locking hole 83 of the retainer 80 is related to the front side end portion 35 of the side wall portion 34 of the case 30. It is smaller than the length obtained by adding the thickness of the flange portion 72 of the first elastic member 70 to the length to the back surface side end portion 32 of the stop portion 31. Therefore, the 1st elastic member 70 pinched | interposed by the back side surface 88 of the inner side flange 87 of the retainer 80 formed with hard resin, and the front side edge part 35 of the side wall part 34 of the case 30 formed with hard resin. The flange portion 72 is compressed in the front and back direction and elastically deformed. Thereby, the back side surface 78 of the flange portion 72 of the first elastic member 70 and the front side end portion 35 of the side wall portion 34 of the case 30 are brought into close contact with each other.

図１２に戻り、リテーナ８０の取付面１２は、両面テープ９２の一方の面が貼り付けられ、その両面テープ９２の他方の面はバンパ９０の裏面に張り付けられる。これにより、超音波センサ１０がバンパ９０に取り付けられる。このとき、振動体５０の送受信面１１及び第１弾性部材７０が、バンパ９０の外部から視認可能となっている。したがって、振動体５０の送受信面１１、及び、第１弾性部材７０は、バンパ９０と同色に着色されている。   Returning to FIG. 12, one surface of the double-sided tape 92 is attached to the attachment surface 12 of the retainer 80, and the other surface of the double-sided tape 92 is attached to the back surface of the bumper 90. Thereby, the ultrasonic sensor 10 is attached to the bumper 90. At this time, the transmission / reception surface 11 of the vibrating body 50 and the first elastic member 70 are visible from the outside of the bumper 90. Therefore, the transmitting / receiving surface 11 of the vibrating body 50 and the first elastic member 70 are colored in the same color as the bumper 90.

ところで、長期、例えば数年に亘る使用に伴い、ケース３０の内部に充填された防水樹脂５９に含有される可塑剤が、第２弾性部材４０及び第１弾性部材７０へと浸透することがある。この場合、その可塑剤により第１弾性部材７０の変色が起こり、第１弾性部材７０の筒状部７１の正面側端部７５はバンパ９０の外側から視認可能であるため、意匠性が低下する。したがって、第１弾性部材７０の交換の必要性が生ずる。   By the way, with use over a long period of time, for example, several years, the plasticizer contained in the waterproof resin 59 filled in the case 30 may permeate into the second elastic member 40 and the first elastic member 70. . In this case, discoloration of the first elastic member 70 is caused by the plasticizer, and the front side end portion 75 of the cylindrical portion 71 of the first elastic member 70 is visible from the outside of the bumper 90, so that the design property is deteriorated. . Therefore, the need to replace the first elastic member 70 arises.

第１弾性部材７０の交換手順について説明する。まず、バンパ９０から超音波センサ１０を取り外す。超音波センサ１０はバンパ９０に両面テープ９２により取り付けられているため、その両面テープ９２を剥がせばよい。続いて、リテーナ８０から本体部材２０を取り外す。具体的には、リテーナ８０に設けられた操作部材８６を外側へ変位させれば、その変位に連なって、係止部材８２も外側へ変位する。これにより、係止部材８２の係止穴８３から本体部材２０の係止部３１が外れ、リテーナ８０から本体部材２０を取り外すことができる。リテーナ８０から本体部材２０を取り外せば、第１弾性部材７０は振動体５０に被せられているものであるため容易に取り外すことができる。こうすることで、第１弾性部材７０に変色が生じたとしても、容易に交換が可能となる。   A procedure for replacing the first elastic member 70 will be described. First, the ultrasonic sensor 10 is removed from the bumper 90. Since the ultrasonic sensor 10 is attached to the bumper 90 with the double-sided tape 92, the double-sided tape 92 may be peeled off. Subsequently, the main body member 20 is removed from the retainer 80. Specifically, when the operation member 86 provided on the retainer 80 is displaced outward, the locking member 82 is also displaced outward in tandem with the displacement. Accordingly, the locking portion 31 of the main body member 20 is released from the locking hole 83 of the locking member 82, and the main body member 20 can be removed from the retainer 80. If the main body member 20 is removed from the retainer 80, the first elastic member 70 is covered with the vibrating body 50 and can be easily removed. By doing so, even if the first elastic member 70 is discolored, it can be easily replaced.

上記構成により、本実施形態に係る超音波センサ１０は、以下の効果を奏する。   With the above configuration, the ultrasonic sensor 10 according to the present embodiment has the following effects.

・振動体５０の側面５２を囲う弾性部材を、外側から視認できる第１弾性部材７０と、外側から視認できない第２弾性部材４０とに分割して設けている。これにより、第１弾性部材７０に変色などが生じて意匠性が低下した場合、第１弾性部材７０を交換すればよい。したがって、容易に意匠性を回復することができる。   The elastic member that surrounds the side surface 52 of the vibrating body 50 is divided into a first elastic member 70 that can be seen from the outside and a second elastic member 40 that cannot be seen from the outside. Thereby, when discoloration etc. arise in the 1st elastic member 70 and the designability falls, the 1st elastic member 70 should just be replaced | exchanged. Therefore, the designability can be easily recovered.

・リテーナ８０の内側フランジ８７の裏側面８８と、リテーナ８０の係止穴８３の裏側端面８４との表裏方向の長さを、ケース３０の側壁部３４の正面側端部３５から係止部３１の裏面側端部３２までの長さに第１弾性部材７０のフランジ部７２の厚みを加えた長さよりも小さくしている。こうすることで、第１弾性部材７０が取り付けられた本体部材２０をリテーナ８０に取り付けた際に、第１弾性部材７０のフランジ部７２は表裏方向に圧縮され、その厚みが小さくなる。これにより、第１弾性部材７０のフランジ部７２の裏側面７８と、本体部材２０の側壁部３４の正面側端部３５とが密着することとなる。ゆえに、第１弾性部材７０のフランジ部７２と、本体部材２０の側壁部３４との間から、超音波センサ１０の外部へと、超音波が漏れる事態を抑制することができる。したがって、その超音波の漏れによって生ずるノイズを抑制することができる。   The length in the front and back direction between the back side surface 88 of the inner flange 87 of the retainer 80 and the back side end surface 84 of the locking hole 83 of the retainer 80 is set from the front side end portion 35 of the side wall portion 34 of the case 30 to the locking portion 31. It is made smaller than the length which added the thickness of the flange part 72 of the 1st elastic member 70 to the length to the back surface side edge part 32 of this. In this way, when the main body member 20 to which the first elastic member 70 is attached is attached to the retainer 80, the flange portion 72 of the first elastic member 70 is compressed in the front and back direction, and the thickness thereof is reduced. Thereby, the back side surface 78 of the flange portion 72 of the first elastic member 70 and the front side end portion 35 of the side wall portion 34 of the main body member 20 are brought into close contact with each other. Therefore, it is possible to suppress a situation in which ultrasonic waves leak from between the flange portion 72 of the first elastic member 70 and the side wall portion 34 of the main body member 20 to the outside of the ultrasonic sensor 10. Therefore, noise caused by the leakage of the ultrasonic wave can be suppressed.

・弾性を有する部材を圧縮すれば、その部材の硬度が増し、それに伴い振動吸収性能が低下する。本実施形態では、第１弾性部材７０の筒状部７１については表裏方向に圧縮せず、第１弾性部材７０のフランジ部７２を圧縮するものとしている。これにより、第１弾性部材７０の筒状部７１の振動吸収性能を確保しつつ、第１弾性部材７０のフランジ部７２と、本体部材２０の側壁部３４との間からの超音波の漏れを抑制することができる。したがって、その超音波の漏れによって生ずるノイズを抑制することができる。   -If a member having elasticity is compressed, the hardness of the member increases, and the vibration absorption performance decreases accordingly. In the present embodiment, the cylindrical portion 71 of the first elastic member 70 is not compressed in the front and back direction, and the flange portion 72 of the first elastic member 70 is compressed. Accordingly, leakage of ultrasonic waves from between the flange portion 72 of the first elastic member 70 and the side wall portion 34 of the main body member 20 is ensured while ensuring the vibration absorption performance of the cylindrical portion 71 of the first elastic member 70. Can be suppressed. Therefore, noise caused by the leakage of the ultrasonic wave can be suppressed.

・硬質の樹脂で形成された部材どうしを嵌め合せた場合、部材の間に隙間が生ずることがあり、この隙間により、がたつきが生ずるおそれがある。本実施形態では、本体部材２０とリテーナ８０とを嵌め合せる際に、それら間に第１弾性部材７０のフランジ部７２が介在しており、且つ、そのフランジ部７２は表裏方向に圧縮されて弾性変形している。したがって、リテーナ８０と本体部材２０との表裏方向の隙間を、第１弾性部材７０のフランジ部７２により埋めることができ、取付時のがたつきを抑制することができる。   -When members formed of hard resin are fitted together, a gap may be formed between the members, and this gap may cause rattling. In the present embodiment, when the main body member 20 and the retainer 80 are fitted together, the flange portion 72 of the first elastic member 70 is interposed between them, and the flange portion 72 is compressed in the front and back direction to be elastic. It is deformed. Therefore, the gap in the front and back direction between the retainer 80 and the main body member 20 can be filled with the flange portion 72 of the first elastic member 70, and rattling during mounting can be suppressed.

・硬質の樹脂で形成された部材どうしを嵌め合せた場合、部材どうしが密着していれば、取り外しの必要性が生じた場合に、取り外しが困難である可能性がある。一方、取り外しを容易にすべく、部材の間にあそびを設けた場合、がたつきが生ずるおそれがある。本実施形態では、本体部材２０とリテーナ８０とを嵌め合せるうえで、間に第１弾性部材７０のフランジ部７２が介在しているため、取り外しの際には、その第１弾性部材７０が変形することとなる。したがって、部材どうしの取り外しを容易にしつつ、がたつきを抑制することができる。   -When members formed of hard resin are fitted to each other, if the members are in close contact with each other, it may be difficult to remove them when it becomes necessary to remove them. On the other hand, when a play is provided between the members to facilitate removal, there is a risk of rattling. In the present embodiment, since the flange portion 72 of the first elastic member 70 is interposed between the main body member 20 and the retainer 80, the first elastic member 70 is deformed during removal. Will be. Therefore, rattling can be suppressed while making it easy to remove the members.

＜第２実施形態＞
本実施形態に係る超音波センサ１０は、第１弾性部材７０の構造の一部、及び、第２弾性部材４０の構造の一部が、第１実施形態と異なっている。 Second Embodiment
The ultrasonic sensor 10 according to the present embodiment is different from the first embodiment in part of the structure of the first elastic member 70 and part of the structure of the second elastic member 40.

本実施形態に係る超音波センサ１０の第１弾性部材７０の周辺の構造について、図１４を参照して説明する。   The structure around the first elastic member 70 of the ultrasonic sensor 10 according to the present embodiment will be described with reference to FIG.

第１弾性部材７０の筒状部７１の裏面側端部７７には、凹面７７ａが形成されている。一方、第１弾性部材７０の筒状部７１の裏面側端部７７に対向する、第２弾性部材４０の正面側端部４２には、凸面４２ａが形成されている。この凸面４２ａは、凹面７７ａの形状に略一致するように形成されている。   A concave surface 77 a is formed on the rear surface side end 77 of the cylindrical portion 71 of the first elastic member 70. On the other hand, a convex surface 42 a is formed on the front side end portion 42 of the second elastic member 40, which faces the back side end portion 77 of the cylindrical portion 71 of the first elastic member 70. The convex surface 42a is formed so as to substantially match the shape of the concave surface 77a.

したがって、第１弾性部材７０を振動体５０に被せた際に、第１弾性部材７０の凹面７７ａと第２弾性部材４０の凸面４２ａとが当接する。これにより、第１弾性部材７０と、ケース３０及び第２弾性部材４０との当接面は、面一な面ではなくなる。   Therefore, when the first elastic member 70 is put on the vibrating body 50, the concave surface 77a of the first elastic member 70 and the convex surface 42a of the second elastic member 40 abut. Thereby, the contact surfaces of the first elastic member 70 and the case 30 and the second elastic member 40 are not flush with each other.

上記構成により、本実施形態に係る超音波センサ１０は、第１実施形態に係る超音波センサ１０が奏する効果に加えて、以下の効果を奏する。   With the above configuration, the ultrasonic sensor 10 according to the present embodiment has the following effects in addition to the effects exhibited by the ultrasonic sensor 10 according to the first embodiment.

・第１弾性部材７０と第２弾性部材４０との当接面に凹凸を設けているため、振動体５０の側面５２から生じた超音波が、直線的に抜ける経路がない。したがって、第１弾性部材７０とケース３０の側壁部３４及び第２弾性部材４０との間からの超音波の漏れを抑制することができる。   Since the contact surface between the first elastic member 70 and the second elastic member 40 is uneven, there is no path through which the ultrasonic wave generated from the side surface 52 of the vibrating body 50 passes straight. Therefore, leakage of ultrasonic waves from between the first elastic member 70 and the side wall portion 34 of the case 30 and the second elastic member 40 can be suppressed.

＜第３実施形態＞
本実施形態に係る超音波センサ１０は、第１弾性部材７０の構造の一部が、第１実施形態と異なっている。 <Third Embodiment>
In the ultrasonic sensor 10 according to this embodiment, a part of the structure of the first elastic member 70 is different from that of the first embodiment.

本実施形態に係る超音波センサ１０の第１弾性部材７０の周辺の構造について、図１５を参照して説明する。第１弾性部材７０の筒状部７１の裏面側端部７７には、第２実施形態と同様に、凹面７７ａが形成されている。一方、第１弾性部材７０の筒状部７１の裏面側端部７７に対向する、第２弾性部材４０の正面側端部４２は、第１実施形態と同様に、正面に対して水平な平面である。   The structure around the first elastic member 70 of the ultrasonic sensor 10 according to the present embodiment will be described with reference to FIG. A concave surface 77a is formed on the rear surface side end 77 of the cylindrical portion 71 of the first elastic member 70, as in the second embodiment. On the other hand, the front-side end 42 of the second elastic member 40 that faces the back-side end 77 of the cylindrical portion 71 of the first elastic member 70 is a flat surface that is horizontal to the front, as in the first embodiment. It is.

したがって、第１弾性部材７０を振動体５０に被せた際に、第１弾性部材７０の裏面側端部７７の一部と、第２弾性部材４０の正面側端部４２の一部とが当接する。一方、第１弾性部材７０の裏面側端部７７に設けられた凹面７７ａと、第２弾性部材４０の正面側端部４２との間には、空隙７７ｂが形成される。これにより、振動体５０の側面５２から生じた超音波は、空隙７７ｂへ侵入した後、第１弾性部材７０と第２弾性部材４０との当接面へ到達する。なお、第１弾性部材７０の裏面側端部７７と、第２弾性部材４０の正面側端部４２との対向している部分を対向部と称すれば、空隙７７ｂはその対向部に形成されているといえる。   Therefore, when the first elastic member 70 is put on the vibrating body 50, a part of the back surface side end 77 of the first elastic member 70 and a part of the front side end 42 of the second elastic member 40 are in contact with each other. Touch. On the other hand, a gap 77 b is formed between the concave surface 77 a provided at the back surface side end portion 77 of the first elastic member 70 and the front surface side end portion 42 of the second elastic member 40. Thereby, the ultrasonic wave generated from the side surface 52 of the vibrating body 50 enters the gap 77 b and then reaches the contact surface between the first elastic member 70 and the second elastic member 40. In addition, if the part which the back side edge part 77 of the 1st elastic member 70 and the front side edge part 42 of the 2nd elastic member 40 are facing is called an opposing part, the space | gap 77b will be formed in the opposing part. It can be said that.

上記構成により、本実施形態に係る超音波センサ１０は、第１実施形態に係る超音波センサ１０が奏する効果に加えて、以下の効果を奏する。   With the above configuration, the ultrasonic sensor 10 according to the present embodiment has the following effects in addition to the effects exhibited by the ultrasonic sensor 10 according to the first embodiment.

・振動体５０の側面５２から生じた超音波は、空隙７７ｂにて減衰した後に、第１弾性部材７０と第２弾性部材４０との当接面へ到達する。これにより、第１弾性部材７０の裏面側端部７７と第２弾性部材４０の正面側端部４２との当接面、及び、第１弾性部材７０のフランジ部７２の裏側面７８と側壁部３４の正面側端部３５との当接面では、減衰した超音波の外部への漏出を抑制することとなる。したがって、超音波の外部への漏出防止の効果を、より向上させることができる。   The ultrasonic wave generated from the side surface 52 of the vibrating body 50 reaches the contact surface between the first elastic member 70 and the second elastic member 40 after being attenuated in the gap 77b. Thereby, the contact surface of the back surface side end portion 77 of the first elastic member 70 and the front surface side end portion 42 of the second elastic member 40, and the back side surface 78 and the side wall portion of the flange portion 72 of the first elastic member 70. In the contact surface with the front side end portion 35 of 34, leakage of the attenuated ultrasonic wave to the outside is suppressed. Therefore, the effect of preventing the leakage of ultrasonic waves to the outside can be further improved.

＜第４実施形態＞
本実施形態に係る超音波センサ１０は、第１弾性部材７０の構造の一部、及び、第２弾性部材４０の構造の一部が、第１実施形態と異なっている。 <Fourth embodiment>
The ultrasonic sensor 10 according to the present embodiment is different from the first embodiment in part of the structure of the first elastic member 70 and part of the structure of the second elastic member 40.

本実施形態に係る超音波センサ１０の第１弾性部材７０の周辺の構造について、図１６を参照して説明する。   A structure around the first elastic member 70 of the ultrasonic sensor 10 according to the present embodiment will be described with reference to FIG.

第１弾性部材７０の筒状部７１の裏面側端部７７には、凹面７７ａが形成されている。この凹面７７ａの形状は、第２実施形態と同じである。一方、第１弾性部材７０の筒状部７１の裏面側端部７７に対向する、第２弾性部材４０の正面側端部４２には、凸面４２ａが形成されている。この凸面４２ａの表裏方向の高さは、第２実施形態の凸面４２ａよりも小さい。すなわち、凸面４２ａの表裏方向の高さは、凹面７７ａの表裏方向の深さよりも小さい。   A concave surface 77 a is formed on the rear surface side end 77 of the cylindrical portion 71 of the first elastic member 70. The shape of the concave surface 77a is the same as in the second embodiment. On the other hand, a convex surface 42 a is formed on the front side end portion 42 of the second elastic member 40, which faces the back side end portion 77 of the cylindrical portion 71 of the first elastic member 70. The height of the convex surface 42a in the front and back direction is smaller than the convex surface 42a of the second embodiment. That is, the height of the convex surface 42a in the front-back direction is smaller than the depth of the concave surface 77a in the front-back direction.

したがって、第１弾性部材７０を振動体５０に被せた際に、第１弾性部材７０の凹面７７ａと第２弾性部材４０の凸面４２ａとの間に、空隙７７ｂが形成される。加えて、第１弾性部材７０と、ケース３０及び第２弾性部材４０との間の面は、面一な面ではなくなる。すなわち、空隙７７ｂにより超音波を減衰させつつ、超音波が直線的に抜ける経路を無くすことができる。なお、第１弾性部材７０の裏面側端部７７と、第２弾性部材４０の正面側端部４２との対向している部分を対向部と称すれば、空隙７７ｂはその対向部に形成されているといえる。   Therefore, when the first elastic member 70 is put on the vibrating body 50, a gap 77 b is formed between the concave surface 77 a of the first elastic member 70 and the convex surface 42 a of the second elastic member 40. In addition, the surface between the first elastic member 70 and the case 30 and the second elastic member 40 is not a flush surface. In other words, it is possible to eliminate a path through which the ultrasonic wave passes linearly while the ultrasonic wave is attenuated by the gap 77b. In addition, if the part which the back side edge part 77 of the 1st elastic member 70 and the front side edge part 42 of the 2nd elastic member 40 are facing is called an opposing part, the space | gap 77b will be formed in the opposing part. It can be said that.

上記構成により、本実施形態に係る超音波センサ１０は、第１〜第３実施形態に係る超音波センサ１０が奏する効果のいずれも奏する。   With the above configuration, the ultrasonic sensor 10 according to the present embodiment exhibits all of the effects exhibited by the ultrasonic sensor 10 according to the first to third embodiments.

＜第５実施形態＞
本実施形態に係る超音波センサ１０は、第１弾性部材７０の構造の一部、第２弾性部材４０の構造の一部、及び、リテーナ８０の構造の一部が、第１実施形態と異なっている。 <Fifth Embodiment>
The ultrasonic sensor 10 according to this embodiment is different from the first embodiment in a part of the structure of the first elastic member 70, a part of the structure of the second elastic member 40, and a part of the structure of the retainer 80. ing.

本実施形態に係る超音波センサ１０の第１弾性部材７０の周辺の構造について、図１７を参照して説明する。本実施形態におけるリテーナ８０では、内側フランジ８７ａの裏側面８８ａから、係止穴８３の裏側端面８４との表裏方向の長さを、ケース３０の側壁部３４の正面側端部３５から係止部３１の裏面側端部３２までの長さに第１弾性部材７０のフランジ部７２の厚みを加えた長さと略等しくしている。したがって、図１７に示すように、第１弾性部材７０のフランジ部７２は、表裏方向へと圧縮されない。   A structure around the first elastic member 70 of the ultrasonic sensor 10 according to the present embodiment will be described with reference to FIG. In the retainer 80 in the present embodiment, the length in the front and back direction from the back side surface 88a of the inner flange 87a to the back side end surface 84 of the locking hole 83 is changed from the front side end portion 35 of the side wall portion 34 of the case 30 to the locking portion. 31 is substantially equal to the length obtained by adding the thickness of the flange portion 72 of the first elastic member 70 to the length of the rear surface side end portion 31 of the first elastic member 70. Accordingly, as shown in FIG. 17, the flange portion 72 of the first elastic member 70 is not compressed in the front-back direction.

第１弾性部材７０の筒状部７１の裏面側端部７７には、第２実施形態と同様に、凹面７７ａが形成されている。一方、第１弾性部材７０の筒状部７１の裏面側端部７７に対向する、第２弾性部材４０の正面側端部４２には、第２実施形態と同様に、凸面４２ａが形成されている。この凸面４２ａは、凹面７７ａの形状に略一致するように形成されている。   A concave surface 77a is formed on the rear surface side end 77 of the cylindrical portion 71 of the first elastic member 70, as in the second embodiment. On the other hand, a convex surface 42a is formed on the front side end portion 42 of the second elastic member 40 facing the back side end portion 77 of the cylindrical portion 71 of the first elastic member 70, as in the second embodiment. Yes. The convex surface 42a is formed so as to substantially match the shape of the concave surface 77a.

したがって、第１弾性部材７０を振動体５０に被せた際に、第１弾性部材７０の凹面７７ａと第２弾性部材４０の凸面４２ａとが当接する。これにより、第１弾性部材７０と、ケース３０及び第２弾性部材４０との当接面は、面一な面ではなくなる。   Therefore, when the first elastic member 70 is put on the vibrating body 50, the concave surface 77a of the first elastic member 70 and the convex surface 42a of the second elastic member 40 abut. Thereby, the contact surfaces of the first elastic member 70 and the case 30 and the second elastic member 40 are not flush with each other.

上記構成により、本実施形態に係る超音波センサ１０は、以下の効果を奏する。   With the above configuration, the ultrasonic sensor 10 according to the present embodiment has the following effects.

・第１弾性部材７０と、ケース３０及び第２弾性部材４０との当接面に凹凸を設けているため、振動体５０の側面５２から生じた超音波が、直線的に抜ける経路がない。したがって、第１弾性部材７０とケース３０の側壁部３４との間からの超音波の漏れを抑制することができる。   Since the contact surfaces between the first elastic member 70 and the case 30 and the second elastic member 40 are uneven, there is no path through which the ultrasonic waves generated from the side surface 52 of the vibrating body 50 come off linearly. Therefore, leakage of ultrasonic waves from between the first elastic member 70 and the side wall portion 34 of the case 30 can be suppressed.

＜第６実施形態＞
本実施形態に係る超音波センサ１０は、リテーナ８０の形状、及び第１弾性部材７０の形状は第５実施形態と同等であり、第２弾性部材４０の形状の一部が第５実施形態と異なっている。 <Sixth Embodiment>
In the ultrasonic sensor 10 according to this embodiment, the shape of the retainer 80 and the shape of the first elastic member 70 are the same as those of the fifth embodiment, and a part of the shape of the second elastic member 40 is the same as that of the fifth embodiment. Is different.

本実施形態に係る超音波センサ１０の第１弾性部材７０の周辺の構造について、図１８を参照して説明する。   A structure around the first elastic member 70 of the ultrasonic sensor 10 according to the present embodiment will be described with reference to FIG.

第１弾性部材７０の筒状部７１の裏面側端部７７には、凹面７７ａが形成されている。この凹面７７ａの形状は、第５実施形態と同じである。一方、第１弾性部材７０の筒状部７１の裏面側端部７７に対向する、第２弾性部材４０の正面側端部４２には、凸面４２ａが形成されている。この凸面４２ａの表裏方向の高さは、第２実施形態の凸面４２ａよりも小さい。すなわち、凸面４２ａの表裏方向の高さは、凹面７７ａの表裏方向の深さよりも小さい。   A concave surface 77 a is formed on the rear surface side end 77 of the cylindrical portion 71 of the first elastic member 70. The shape of the concave surface 77a is the same as that of the fifth embodiment. On the other hand, a convex surface 42 a is formed on the front side end portion 42 of the second elastic member 40, which faces the back side end portion 77 of the cylindrical portion 71 of the first elastic member 70. The height of the convex surface 42a in the front and back direction is smaller than the convex surface 42a of the second embodiment. That is, the height of the convex surface 42a in the front-back direction is smaller than the depth of the concave surface 77a in the front-back direction.

したがって、第１弾性部材７０を振動体５０に被せた際に、第１弾性部材７０の凹面７７ａと第２弾性部材４０の凸面４２ａとの間に、空隙７７ｂが形成される。加えて、第１弾性部材７０と、ケース３０及び第２弾性部材４０との間の面は、面一な面ではなくなる。すなわち、空隙７７ｂにより超音波を減衰させつつ、超音波が直線的に抜ける経路を無くすことができる。なお、第１弾性部材７０の裏面側端部７７と、第２弾性部材４０の正面側端部４２との対向している部分を対向部と称すれば、空隙７７ｂはその対向部に形成されているといえる。   Therefore, when the first elastic member 70 is put on the vibrating body 50, a gap 77 b is formed between the concave surface 77 a of the first elastic member 70 and the convex surface 42 a of the second elastic member 40. In addition, the surface between the first elastic member 70 and the case 30 and the second elastic member 40 is not a flush surface. In other words, it is possible to eliminate a path through which the ultrasonic wave passes linearly while the ultrasonic wave is attenuated by the gap 77b. In addition, if the part which the back side edge part 77 of the 1st elastic member 70 and the front side edge part 42 of the 2nd elastic member 40 are facing is called an opposing part, the space | gap 77b will be formed in the opposing part. It can be said that.

上記構成により、本実施形態に係る超音波センサ１０は、第５実施形態に係る超音波センサ１０が奏する効果に加えて、以下の効果を奏する。   With the above configuration, the ultrasonic sensor 10 according to the present embodiment has the following effects in addition to the effects exhibited by the ultrasonic sensor 10 according to the fifth embodiment.

・振動体５０の側面５２から生じた超音波は、空隙７７ｂにて減衰した後に、第１弾性部材７０と第２弾性部材４０との当接面へ到達する。これにより、第１弾性部材７０の裏面側端部７７と第２弾性部材４０の正面側端部４２との当接面、及び、第１弾性部材７０のフランジ部７２の裏側面７８と側壁部３４の正面側端部３５との当接面では、減衰した超音波の外部への漏出を抑制することとなる。したがって、超音波の外部への漏出防止の効果を、より向上させることができる。   The ultrasonic wave generated from the side surface 52 of the vibrating body 50 reaches the contact surface between the first elastic member 70 and the second elastic member 40 after being attenuated in the gap 77b. Thereby, the contact surface of the back surface side end portion 77 of the first elastic member 70 and the front surface side end portion 42 of the second elastic member 40, and the back side surface 78 and the side wall portion of the flange portion 72 of the first elastic member 70. In the contact surface with the front side end portion 35 of 34, leakage of the attenuated ultrasonic wave to the outside is suppressed. Therefore, the effect of preventing the leakage of ultrasonic waves to the outside can be further improved.

＜第７実施形態＞
本実施形態に係る超音波センサ１０は、第１弾性部材１７０の構造の一部、及び、第２弾性部材４０の構造の一部が、第１実施形態と異なっている。 <Seventh embodiment>
The ultrasonic sensor 10 according to the present embodiment is different from the first embodiment in a part of the structure of the first elastic member 170 and a part of the structure of the second elastic member 40.

本実施形態に係る超音波センサ１０の第１弾性部材１７０の周辺の構造について、図１９を参照して説明する。   A structure around the first elastic member 170 of the ultrasonic sensor 10 according to the present embodiment will be described with reference to FIG.

第２弾性部材４０の表裏方向の長さ、すなわち、正面側端部４２と裏面側端部４１との間の長さは、側壁部３４の正面側端部３５と、内側フランジ３６の表側面３７との間の長さよりも小さく形成されている。したがって、第２弾性部材４０が側壁部３４に収容された際に、第２弾性部材４０の正面側端部４２は、側壁部３４の正面側端部３５よりも裏面側に位置することとなる。   The length in the front-back direction of the second elastic member 40, that is, the length between the front-side end portion 42 and the back-side end portion 41 is the front-side end portion 35 of the side wall portion 34 and the front side surface of the inner flange 36. 37 is formed to be smaller than the length between them. Therefore, when the second elastic member 40 is accommodated in the side wall portion 34, the front side end portion 42 of the second elastic member 40 is positioned on the back side with respect to the front side end portion 35 of the side wall portion 34. .

第１弾性部材１７０の筒状部１７１の表裏方向の高さは、振動体５０の表裏方向の高さと、第２弾性部材４０の内側フランジ４３の表側面４４と正面側端部４２との間の高さとの差と、略等しい。したがって、第１弾性部材１７０を振動体５０に被せた際に、振動体５０の送受信面１１と、筒状部１７１の正面側端部１７５とが、略面一となる。なお、筒状部１７１の内周面には、第１実施形態と同様に、凹部１７３及び凸部１７４が、設けられている。   The height in the front and back direction of the cylindrical portion 171 of the first elastic member 170 is between the height in the front and back direction of the vibrating body 50 and the front side surface 44 and the front side end portion 42 of the inner flange 43 of the second elastic member 40. Is almost equal to the difference in height. Therefore, when the first elastic member 170 is put on the vibrating body 50, the transmission / reception surface 11 of the vibrating body 50 and the front side end portion 175 of the cylindrical portion 171 are substantially flush with each other. In addition, the recessed part 173 and the convex part 174 are provided in the internal peripheral surface of the cylindrical part 171 similarly to 1st Embodiment.

第１弾性部材１７０の筒状部１７１の裏面側端部１７７よりも正面側に、拡径されたフランジ部１７２が設けられている。具体的には、第１弾性部材１７０を振動体５０に被せた際に、第１弾性部材１７０の筒状部１７１の裏面側端部１７７が、第２弾性部材４０の正面側端部４２に当接し、第１弾性部材１７０のフランジ部１７２の裏側面１７８は、ケース３０の側壁部３４の正面側端部３５に当接するように、フランジ部１７２が設けられている。   A flange portion 172 having an enlarged diameter is provided on the front side of the back surface side end portion 177 of the cylindrical portion 171 of the first elastic member 170. Specifically, when the first elastic member 170 is put on the vibrating body 50, the rear surface side end portion 177 of the cylindrical portion 171 of the first elastic member 170 is connected to the front surface side end portion 42 of the second elastic member 40. The flange portion 172 is provided so that the back side surface 178 of the flange portion 172 of the first elastic member 170 contacts the front side end portion 35 of the side wall portion 34 of the case 30.

なお、本実施形態において、第２、４〜６実施形態のごとく、第１弾性部材１７０の筒状部１７１の裏面側端部１７７、及び第２弾性部材４０の正面側端部４２に、凹凸を設けるものとしてもよい。第３、４、６実施形態のごとく、第１弾性部材１７０の筒状部１７１の裏面側端部１７７と第２弾性部材４０の正面側端部４２との間に隙間を設けるものとしてもよい。また、本実施形態では、振動体５０の側面５２から生じた超音波が直線的に抜ける経路がなくなるため、第５、６実施形態のごとく、フランジ部１７２が表裏方向へ圧縮されないものとしてもよい。   In this embodiment, as in the second and fourth to sixth embodiments, the back surface side end portion 177 of the cylindrical portion 171 of the first elastic member 170 and the front side end portion 42 of the second elastic member 40 are uneven. It is good also as what provides. Like 3rd, 4th, 6th embodiment, it is good also as what provides a clearance gap between the back side edge part 177 of the cylindrical part 171 of the 1st elastic member 170, and the front side edge part 42 of the 2nd elastic member 40. FIG. . Further, in the present embodiment, there is no path through which the ultrasonic wave generated from the side surface 52 of the vibrating body 50 is linearly removed. Therefore, as in the fifth and sixth embodiments, the flange portion 172 may not be compressed in the front-back direction. .

上記構成により、本実施形態に係る超音波センサ１０は、第１実施形態に係る超音波センサ１０が奏する効果に加えて、以下の効果を奏する。   With the above configuration, the ultrasonic sensor 10 according to the present embodiment has the following effects in addition to the effects exhibited by the ultrasonic sensor 10 according to the first embodiment.

・第１弾性部材１７０の筒状部１７１の裏面側の一部が、ケース３０の側壁部３４に収容される構成となっているため、第１弾性部材１７０と第２弾性部材４０との当接部と、第１弾性部材１７０と側壁部３４との当接部との間には、段差が生じることとなる。これにより、振動体５０の側面５２から生じた超音波が直線的に抜ける経路がなくなる。   Since a part of the back surface side of the cylindrical portion 171 of the first elastic member 170 is accommodated in the side wall portion 34 of the case 30, the contact between the first elastic member 170 and the second elastic member 40 A step is generated between the contact portion and the contact portion between the first elastic member 170 and the side wall portion 34. Thereby, there is no path through which the ultrasonic wave generated from the side surface 52 of the vibrating body 50 passes linearly.

＜変形例＞
・各実施形態において、第１弾性部材７０，１７０がフランジ部７２，１７２を備えるものとしたが、フランジ部７２，１７２は必須の構成ではない。第１〜第４実施形態及び第７実施形態では、フランジ部７２が表裏方向に圧縮されて弾性変形しつつ、ケース３０の側壁部３４に当接するものとした。この点、フランジ部７２，１７２を設けない場合には、各実施形態よりも第１弾性部材７０，１７０の筒状部７１，１７１の厚みを大きくし、筒状部７１，１７１の裏面側端部７７，１７７が、圧縮されて弾性変形しつつ、ケース３０の側壁部３４に当接するものとすればよい。 <Modification>
-In each embodiment, although the 1st elastic members 70 and 170 shall be provided with the flange parts 72 and 172, the flange parts 72 and 172 are not an essential structure. In the first to fourth embodiments and the seventh embodiment, the flange portion 72 is abutted against the side wall portion 34 of the case 30 while being compressed and elastically deformed in the front and back direction. In this regard, in the case where the flange portions 72 and 172 are not provided, the thickness of the cylindrical portions 71 and 171 of the first elastic members 70 and 170 is made larger than in the respective embodiments, and the rear surface side ends of the cylindrical portions 71 and 171 are increased. The portions 77 and 177 may be in contact with the side wall portion 34 of the case 30 while being compressed and elastically deformed.

・第２実施形態及び第４〜６実施形態において、第１弾性部材７０に凹面７７ａを設け、第２弾性部材４０に凸面４２ａ，４２ｂを設けることにより、超音波が直線的に抜ける経路が無くなるものとした。この点、第１弾性部材７０に凸面を設け、第２弾性部材４０に凹面を設けるものとしてもよいし、凹面や凸面の数を２つ以上としてもよい。   In the second embodiment and the fourth to sixth embodiments, the first elastic member 70 is provided with the concave surface 77a, and the second elastic member 40 is provided with the convex surfaces 42a and 42b, thereby eliminating the path through which the ultrasonic waves come out linearly. It was supposed to be. In this regard, the first elastic member 70 may be provided with a convex surface and the second elastic member 40 may be provided with a concave surface, or the number of concave surfaces or convex surfaces may be two or more.

・各実施形態では、リテーナ８０が備える内側フランジ８７により第１弾性部材７０，１７０のフランジ部７２，１７２が表裏方向へ圧縮されるものとした。この点、第１弾性部材７０，１７０を表裏方向へと圧縮する部材として、リテーナ８０とは異なる部材を用いるものとしてもよい。   In each embodiment, the flange portions 72 and 172 of the first elastic members 70 and 170 are compressed in the front and back direction by the inner flange 87 provided in the retainer 80. In this regard, a member different from the retainer 80 may be used as a member that compresses the first elastic members 70 and 170 in the front and back direction.

・実施形態では、リテーナ８０を用いて車両のバンパ９０へ超音波センサ１０を取り付けるものとしたが、リテーナ８０以外の部材を用いて超音波センサ１０を取り付けるものとしてもよい。   In the embodiment, the ultrasonic sensor 10 is attached to the bumper 90 of the vehicle using the retainer 80, but the ultrasonic sensor 10 may be attached using a member other than the retainer 80.

・各実施形態では、ケース３０の側壁部３４、振動体５０、第１弾性部材７０，１７０、及び第２弾性部材４０を円筒状としたが、円筒状でなくてもよい。すなわち筒状であればよい。   -In each embodiment, although the side wall part 34 of the case 30, the vibrating body 50, the 1st elastic members 70 and 170, and the 2nd elastic member 40 were made into cylindrical shape, it does not need to be cylindrical. That is, it may be cylindrical.

・各実施形態では、超音波センサ１０が車両のバンパ９０に取り付けられるものとしたが、車両のバンパ９０以外の部分に取り付けられるものとしてもよい。また、車両以外に取り付けられるものとしてもよい。   -In each embodiment, although the ultrasonic sensor 10 shall be attached to the bumper 90 of a vehicle, it is good also as what is attached to parts other than the bumper 90 of a vehicle. Moreover, it is good also as what is attached other than a vehicle.

１０…超音波センサ、１１…送受信面、３０…ケース、３４…側壁部、３５…正面側端部、４０…第２弾性部材、４２…正面側端部、４２ａ…凸面、４２ｂ…凸面、５０…振動体、７０…第１弾性部材、７１…筒状部、７２…フランジ部、７７ａ…凹面、７７ｂ…空隙、８０…リテーナ、８７…内側フランジ、１７０…第１弾性部材、１７１…筒状部、１７２…フランジ部。   DESCRIPTION OF SYMBOLS 10 ... Ultrasonic sensor, 11 ... Transmission / reception surface, 30 ... Case, 34 ... Side wall part, 35 ... Front side edge part, 40 ... 2nd elastic member, 42 ... Front side edge part, 42a ... Convex surface, 42b ... Convex surface, 50 ... Vibrating body, 70 ... first elastic member, 71 ... cylindrical portion, 72 ... flange portion, 77a ... concave surface, 77b ... void, 80 ... retainer, 87 ... inner flange, 170 ... first elastic member, 171 ... cylindrical shape Part, 172... Flange part.

Claims (11)

超音波を送受信する送受信面（１１）を正面に有し、前記正面から裏面側に延びる厚みを有する振動体（５０）と、
前記振動体の、正面側の外側面を囲み、その外側面に内側面が当接する筒状の第１弾性部材（７０，１７０）と、
前記振動体の、裏面側の外側面を囲み、その外側面に内側面が当接し、且つ、前記第１弾性部材と正面側で当接する筒状の第２弾性部材（４０）と、
前記振動体及び前記第２弾性部材を収容する筒状の側壁部（３４）を有し、前記第１弾性部材及び前記第２弾性部材よりも硬質であるケース（３０）と、を備え、
前記第１弾性部材は、前記振動体の厚み方向に圧縮された状態で正面側から前記側壁部の正面側端部（３５）に当接している、超音波センサ。 A vibrating body (50) having a transmission / reception surface (11) for transmitting and receiving ultrasonic waves on the front surface and having a thickness extending from the front surface to the back surface;
A cylindrical first elastic member (70, 170) that surrounds an outer surface on the front side of the vibrating body, and an inner surface abuts on the outer surface;
A cylindrical second elastic member (40) surrounding the outer surface of the vibrating body on the back surface, the inner surface abutting on the outer surface, and abutting the first elastic member on the front side;
A cylindrical side wall (34) that accommodates the vibrating body and the second elastic member, and a case (30) that is harder than the first elastic member and the second elastic member,
The ultrasonic sensor, wherein the first elastic member is in contact with a front side end portion (35) of the side wall portion from the front side in a state compressed in the thickness direction of the vibrating body. 前記第１弾性部材は、前記振動体の正面側の外側面を囲む筒状部（７１，１７１）と、その筒状部よりも拡径されたフランジ部（７２，１７２）とを備え、
前記フランジ部が前記厚み方向に圧縮された状態で前記側壁部の正面側端部に当接し、
前記筒状部は圧縮されていない状態で前記第２弾性部材に当接している、請求項１に記載の超音波センサ。 The first elastic member includes a cylindrical portion (71, 171) surrounding an outer surface on the front side of the vibrating body, and a flange portion (72, 172) having a diameter larger than that of the cylindrical portion,
The flange portion is in contact with the front side end portion of the side wall portion in a state compressed in the thickness direction,
The ultrasonic sensor according to claim 1, wherein the cylindrical portion is in contact with the second elastic member in a state where the cylindrical portion is not compressed. 前記第１弾性部材及び前記第２弾性部材よりも硬質であり、前記ケースに組み付けられるリテーナ（８０）をさらに備え、
前記リテーナは、内周側に突出する内側フランジ（８７）を備え、
前記第１弾性部材の前記フランジ部は、前記側壁部の前記正面側端部と前記リテーナの前記内側フランジに挟まれて圧縮される、請求項２に記載の超音波センサ。 A retainer (80) that is harder than the first elastic member and the second elastic member and is assembled to the case;
The retainer includes an inner flange (87) protruding to the inner peripheral side,
The ultrasonic sensor according to claim 2, wherein the flange portion of the first elastic member is compressed by being sandwiched between the front end portion of the side wall portion and the inner flange of the retainer. 前記第１弾性部材（７０）は、その裏面側端部に前記フランジ部（７２）が設けられており、
前記第２弾性部材の正面側端部と、前記側壁部の正面側端部とは面一であり、
前記第１弾性部材の前記フランジ部が設けられた裏面側端部が、前記第２弾性部材及び前記側壁部の前記正面側端部と当接する、請求項２又は３に記載の超音波センサ。 The first elastic member (70) is provided with the flange portion (72) at the back surface side end portion thereof,
The front side end of the second elastic member and the front side end of the side wall are flush with each other,
4. The ultrasonic sensor according to claim 2, wherein a rear surface side end portion of the first elastic member provided with the flange portion is in contact with the second elastic member and the front surface side end portion of the side wall portion. 前記第１弾性部材（１７０）は、その裏面側端部よりも正面側に前記フランジ部（１７２）が設けられており、
前記ケースの前記側壁部は、前記第１弾性部材の前記フランジ部よりも裏面側の前記筒状部（１７１）をさらに収容する、請求項２又は３に記載の超音波センサ。 The first elastic member (170) is provided with the flange portion (172) on the front side rather than the back side end portion,
4. The ultrasonic sensor according to claim 2, wherein the side wall portion of the case further accommodates the cylindrical portion (171) on the back side of the flange portion of the first elastic member. 前記第１弾性部材及び前記第２弾性部材において、互いに対向する各端面には、凹面（７７ａ）及び凸面（４２ａ）の少なくともいずれかがそれぞれ形成され、それらの凹凸面が互いに当接している、請求項１〜３、５のいずれか１項に記載の超音波センサ。   In the first elastic member and the second elastic member, at each end surface facing each other, at least one of a concave surface (77a) and a convex surface (42a) is formed, and the concave and convex surfaces are in contact with each other. The ultrasonic sensor according to claim 1. 前記第１弾性部材と前記第２弾性部材との対向部には、前記第１弾性部材及び前記第２弾性部材が互いに離間する空隙（７７ｂ）と、その外側において互いに当接する当接部とが設けられている、請求項１〜３、５のいずれか１項に記載の超音波センサ。   The facing portion between the first elastic member and the second elastic member has a gap (77b) in which the first elastic member and the second elastic member are separated from each other, and an abutting portion in contact with each other on the outside thereof. The ultrasonic sensor according to claim 1, wherein the ultrasonic sensor is provided. 前記第１弾性部材及び前記第２弾性部材において、互いに対向する各端面には、凹面（７７ａ）及び凸面（４２ｂ）の少なくともいずれかがそれぞれ形成され、それらの凹凸面が互いに離間することで前記空隙が形成されている、請求項７に記載の超音波センサ。   In each of the first elastic member and the second elastic member, at least one of a concave surface (77a) and a convex surface (42b) is formed on each end surface facing each other, and the concave and convex surfaces are separated from each other. The ultrasonic sensor according to claim 7, wherein a void is formed. 超音波を送受信する送受信面（１１）を正面に有し、前記正面から裏面側に延びる厚みを有する振動体（５０）と、
前記振動体の、正面側の外側面を囲み、その外側面に内側面が当接する筒状の第１弾性部材（７０，１７０）と、
前記振動体の、裏面側の外側面を囲み、その外側面に内側面が当接し、且つ、前記第１弾性部材と正面側で当接する筒状の第２弾性部材（４０）と、
前記振動体及び前記第２弾性部材を収容する筒状の側壁部（３４）を有し、前記第１弾性部材及び前記第２弾性部材よりも硬質であるケース（３０）と、を備え、
前記第１弾性部材及び前記第２弾性部材において、互いに対向する各端面には、凹面（７７ａ）及び凸面（４２ａ，４２ｂ）の少なくともいずれかがそれぞれ形成されている、超音波センサ。 A vibrating body (50) having a transmission / reception surface (11) for transmitting and receiving ultrasonic waves on the front surface and having a thickness extending from the front surface to the back surface;
A cylindrical first elastic member (70, 170) that surrounds an outer surface on the front side of the vibrating body, and an inner surface abuts on the outer surface;
A cylindrical second elastic member (40) surrounding the outer surface of the vibrating body on the back surface, the inner surface abutting on the outer surface, and abutting the first elastic member on the front side;
A cylindrical side wall (34) that accommodates the vibrating body and the second elastic member, and a case (30) that is harder than the first elastic member and the second elastic member,
The ultrasonic sensor according to the first elastic member and the second elastic member, wherein at least one of a concave surface (77a) and a convex surface (42a, 42b) is formed on each end surface facing each other. 前記凹面と前記凸面（４２ａ）とが互いに当接している、請求項９に記載の超音波センサ。   The ultrasonic sensor according to claim 9, wherein the concave surface and the convex surface (42a) are in contact with each other. 前記凹面と前記凸面（４２ｂ）との間に空隙（７７ｂ）が設けられている、請求項９に記載の超音波センサ。   The ultrasonic sensor according to claim 9, wherein a gap (77b) is provided between the concave surface and the convex surface (42b).
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