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JP2012032167A - Ultrasonic transmitting/receiving apparatus - Google Patents

Ultrasonic transmitting/receiving apparatus Download PDF

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Publication number
JP2012032167A
JP2012032167A JP2010169408A JP2010169408A JP2012032167A JP 2012032167 A JP2012032167 A JP 2012032167A JP 2010169408 A JP2010169408 A JP 2010169408A JP 2010169408 A JP2010169408 A JP 2010169408A JP 2012032167 A JP2012032167 A JP 2012032167A
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Prior art keywords
cushion
ultrasonic
adhesive
receiver
groove
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JP2010169408A
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Japanese (ja)
Inventor
Takumi Shigemori
巧 重森
Koji Noguchi
浩二 野口
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Nippon Ceramic Co Ltd
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Nippon Ceramic Co Ltd
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Priority to JP2010169408A priority Critical patent/JP2012032167A/en
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Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic transmitting/receiving apparatus with which adhesion work is facilitated, and of which the strength is high and the waterproof shield property is improved.SOLUTION: Inside and outside a cushion attached to the outside of an ultrasonic transceiver, grooves 12 are provided into which an adhesive is poured, and the cushion is adhered to the ultrasonic transceiver by the adhesive injected to the grooves. By causing the adhesive to flow into the grooves, the adhesive is applied at a predetermined position without overflowing.

Description

この発明は、超音波送受信器を設置するためのクッションと、クッションを使用した超音波送受信装置に関するものである。 The present invention relates to a cushion for installing an ultrasonic transmitter / receiver and an ultrasonic transmitter / receiver using the cushion.

近年、自動車(車両)のバックソナー用として防滴型の超音波送受信器が大量に生産されている。有底筒状ケースの底面に圧電素子を貼り付けてなる超音波送受信器が主に使用されている。 In recent years, a large number of drip-proof ultrasonic transmitters / receivers have been produced for automobile (vehicle) back sonar. An ultrasonic transmitter / receiver in which a piezoelectric element is attached to the bottom surface of a bottomed cylindrical case is mainly used.

図1に一般的に使用されている超音波送受信器の構造と、超音波送受信器の取付図を示す。アルミ合金からなる有底筒状ケース2の底面に両面銀電極の施された圧電素子1が接着剤によって接着されている。ケース2と銀電極の接着部は、接触によって電気的に接続されている。圧電素子1の一方の電極にはリード線3が半田付けされている。ケース側には、アルミット半田によってリード線4が半田つけされている。リード線の一端は、樹脂モールド5のピン5aに半田つけされている。圧電素子1は、シリコーン発泡体からなる吸音材7で覆われている。ケース内部はショアA硬度30〜60のシリコーンなどの封止剤8によって封止されている。樹脂モールド5とケース2間にはシリコーンからなるスペーサー6が設けられている。上記の超音波送受信器がショアA硬度30〜60のシリコーンなどからなるクッション9を介してハウジング10に取り付けられている。 FIG. 1 shows a structure of an ultrasonic transmitter / receiver generally used and an attachment diagram of the ultrasonic transmitter / receiver. A piezoelectric element 1 having a double-sided silver electrode is bonded to the bottom surface of a bottomed cylindrical case 2 made of an aluminum alloy with an adhesive. The adhesion part of case 2 and a silver electrode is electrically connected by contact. A lead wire 3 is soldered to one electrode of the piezoelectric element 1. The lead wire 4 is soldered to the case side by aluminum solder. One end of the lead wire is soldered to the pin 5 a of the resin mold 5. The piezoelectric element 1 is covered with a sound absorbing material 7 made of silicone foam. The inside of the case is sealed with a sealant 8 such as silicone having a Shore A hardness of 30 to 60. A spacer 6 made of silicone is provided between the resin mold 5 and the case 2. The ultrasonic transmitter / receiver is attached to the housing 10 via a cushion 9 made of silicone having a Shore A hardness of 30 to 60 or the like.

これらの超音波送受信器は、圧電素子を貼り付けたケースの振動によって超音波を発生させる。そのため超音波送受信器は、超音波送受信器の振動を妨げない柔らかい材料で保持される必要がある。−40℃〜100℃の間で物性変化が少なく安定な、ショアA硬度30〜60程度のシリコーンが主に使用されている。 These ultrasonic transmitters / receivers generate ultrasonic waves by vibration of a case to which a piezoelectric element is attached. Therefore, the ultrasonic transmitter / receiver needs to be held by a soft material that does not interfere with the vibration of the ultrasonic transmitter / receiver. Silicone having a Shore A hardness of about 30 to 60 which is stable with little change in physical properties between -40 ° C and 100 ° C is mainly used.

特願2008−291476Japanese Patent Application No. 2008-291476

一般的にクッションと超音波送受信器、またはクッションとハウジングは接着されておらず、超音波送受信器に(ハウジングから)引き抜く方向の力が加わった場合に、比較的小さな力で抜けてしまうという問題がある。クッションと超音波送受信器またはクッションとハウジングを接着剤によって接着することで、引き抜きに対して高い強度を得ることができる。しかし、クッションと超音波送受信器またはクッションとハウジングの間に、クッションから接着剤がはみ出すことなく接着剤を塗布する事が困難である。接着剤がはみ出した場合は、後工程の塗装に影響すると考えられる。はみ出した接着剤によって、取付の際の嵌合が悪くなるなどの問題が発生している。 In general, the cushion and the ultrasonic transmitter / receiver, or the cushion and the housing are not bonded, and when the pulling force is applied to the ultrasonic transmitter / receiver (from the housing), it will come out with a relatively small force. There is. By bonding the cushion and the ultrasonic transmitter / receiver or the cushion and the housing with an adhesive, it is possible to obtain high strength against pulling. However, it is difficult to apply an adhesive between the cushion and the ultrasonic transceiver or between the cushion and the housing without the adhesive protruding from the cushion. When the adhesive protrudes, it is considered that it affects the subsequent coating. The protruding adhesive causes problems such as poor fitting during mounting.

また、クッションと超音波送受信器またはクッションとハウジングの間に隙間があることで、製品内部に水が浸入し、浸入した水によって製品の内部が腐食される問題がある。
In addition, since there is a gap between the cushion and the ultrasonic transmitter / receiver or between the cushion and the housing, there is a problem that water enters the product and the inside of the product is corroded by the intruded water.

請求項1の発明では、外側が円筒状の金属または樹脂からなるケースに圧電素子を接着してなる超音波送受信器と、超音波送受信器を設置する為の筒状の開口部が設けられたハウジングと、前記超音波送受信器と前記ハウジングの間に前記超音波送受信器を覆うように設けられた円筒型クッションと、からなる超音波送受信装置において、
円筒型クッションの内側または外側の少なくとも一方の面に接着剤を流し込む為の溝を設け、クッションの一端に設けられた接着剤注入部から溝に接着剤を流し込み、溝に流し込まれた流し込まれた接着剤によってクッションと超音波送受信器またはクッションとハウジングの少なくともいずれか一方が接着することで、引き抜きに対して強固で、クッションと超音波送受信器またはクッションとハウジングを容易に接着することのできる超音波送受信装置を実現する。
According to the first aspect of the present invention, an ultrasonic transmitter / receiver in which a piezoelectric element is bonded to a case made of a metal or resin having a cylindrical shape on the outside, and a cylindrical opening for installing the ultrasonic transmitter / receiver are provided. In an ultrasonic transmission / reception apparatus comprising a housing, and a cylindrical cushion provided so as to cover the ultrasonic transmission / reception unit between the ultrasonic transmission / reception unit and the housing,
A groove for pouring the adhesive into the inner or outer surface of the cylindrical cushion was provided, and the adhesive was poured into the groove from the adhesive injection part provided at one end of the cushion, and poured into the groove. By bonding at least one of the cushion and the ultrasonic transceiver or the cushion and the housing with the adhesive, it is strong against pulling out and can be easily bonded to the cushion and the ultrasonic transceiver or the cushion and the housing. A sound wave transmitting / receiving device is realized.

請求項2の発明では、クッションの円周上を少なくとも一周する溝を設けることで、クッションと超音波送受信器またはクッションとハウジングの間から浸入する水が、製品内部へ浸入する事を防ぐことが出来る。防水シールド性のある請求項1に記載の超音波送受信器を実現する。
In the invention of claim 2, by providing a groove that makes at least one round on the circumference of the cushion, it is possible to prevent water entering from between the cushion and the ultrasonic transceiver or between the cushion and the housing from entering the product. I can do it. The ultrasonic transmitter / receiver according to claim 1 having a waterproof shielding property is realized.

請求項3の発明では、クッションに設けられた外側の溝と内側の溝を繋ぐ貫通穴をクッションに設けることで、クッションの接着剤注入部から注入された接着剤は、内側の面と外側の面と繋ぐ貫通穴によって両面に回り込む。一度の接着剤注入で、両面の接着を可能となる作業性のよい請求項1または2に記載の超音波送受信装置を実現する。 In the invention of claim 3, by providing the cushion with a through hole that connects the outer groove and the inner groove provided in the cushion, the adhesive injected from the adhesive injection portion of the cushion is It wraps around both sides with a through hole that connects to the surface. The ultrasonic transmission / reception apparatus according to claim 1 or 2, which is capable of adhering both surfaces with a single injection of adhesive and has good workability.

請求項4の発明では、クッションに設ける溝をクッションの巻くようなスパイラル状にすることで、接着剤の流動性を高め、より作業性の高い請求項1から3に記載の超音波送受信装置を実現する。 According to a fourth aspect of the present invention, there is provided the ultrasonic transmitting / receiving apparatus according to any one of the first to third aspects, wherein the groove provided in the cushion is formed in a spiral shape around which the cushion is wound, thereby improving the fluidity of the adhesive. Realize.

請求項5の発明では、クッション材料としてショアA硬度30〜60のシリコーンを用いる事で、引き抜きに強く、超音波送受信器から発生した超音波がハウジングに反射することで発生する反射ノイズを防ぐことができる。強度があり、超音波特性に優れる請求項1から4に記載の超音波送受信装置を実現する。 In the invention of claim 5, by using silicone having a Shore A hardness of 30 to 60 as a cushion material, it is resistant to pulling out and prevents reflection noise generated by reflection of ultrasonic waves generated from the ultrasonic transceiver to the housing. Can do. The ultrasonic transmission / reception apparatus according to claim 1, which has strength and is excellent in ultrasonic characteristics.

実地例1Practical example 1

本発明を実施したクッションの例を図2に示す。ショアA硬度40のシリコーンからなる円筒状クッション14の内側と外側の面に、溝がそれぞれ設けられている。クッションの外側の一周する2本の溝11が設けられている。クッションの内側を一周する2本の溝12が設けられている。内側の溝12は、クッションの一端に設けられた接着剤注入部12aに繋がっている。外側の溝11は、同じくクッションの一端に設けられた接着剤注入部11aに繋がっている。接着剤注入部11a、12aは、接着剤を流し込む為に、クッションの意匠面と反対の面に設けられている。
An example of a cushion embodying the present invention is shown in FIG. Grooves are respectively provided on the inner and outer surfaces of the cylindrical cushion 14 made of silicone having a Shore A hardness of 40. Two grooves 11 that make a round around the outside of the cushion are provided. Two grooves 12 that go around the inside of the cushion are provided. The inner groove 12 is connected to an adhesive injection part 12a provided at one end of the cushion. The outer groove 11 is also connected to an adhesive injection part 11a provided at one end of the cushion. Adhesive injection part 11a, 12a is provided in the surface opposite to the design surface of a cushion, in order to pour an adhesive agent.

図2のクッション14の取付例を図3に示す。外径φ14の超音波送受信器のケース2に、クッション14を取付、クッション14を取り付けたケース2を筒状の超音波送受信器取付部をもつハウジング13に圧入して、取り付ける。ハウジング13の内側には接着剤注入穴13aが設けられており、注入穴13aからクッション14に設けられた接着剤注入部11aと穴12aに接着剤を注入することができる。図4に注入された接着剤の流れを示す。接着剤注入部12aの一方から注入された接着剤は、溝12を通って、もう一方の穴12aから出てくる。また穴11aの一方から注入された接着剤は、溝11を通って、もう一方の穴11aから出てくる。クッション14に設けられた溝によって、接着剤を所定の場所に塗布することができる。接着剤によってクッション14と超音波送受信器のケース2またはハウジング13が接着されることで引き抜きに対して強い超音波送受信装置を得ることができる。また接着剤によってクッション14とケース2の間と、クッション14とハウジング13の間が埋められる為に、外部から水の浸入を防ぐことができる。 An example of attachment of the cushion 14 of FIG. 2 is shown in FIG. A cushion 14 is attached to a case 2 of an ultrasonic transmitter / receiver having an outer diameter φ14, and the case 2 attached with the cushion 14 is press-fitted into a housing 13 having a cylindrical ultrasonic transmitter / receiver mounting portion. An adhesive injection hole 13a is provided inside the housing 13, and the adhesive can be injected from the injection hole 13a into the adhesive injection portion 11a provided in the cushion 14 and the hole 12a. FIG. 4 shows the flow of the injected adhesive. The adhesive injected from one of the adhesive injection portions 12a passes through the groove 12 and comes out from the other hole 12a. The adhesive injected from one of the holes 11a passes through the groove 11 and comes out of the other hole 11a. The adhesive can be applied to a predetermined place by a groove provided in the cushion 14. By bonding the cushion 14 and the case 2 or the housing 13 of the ultrasonic transmitter / receiver with an adhesive, an ultrasonic transmitter / receiver that is strong against pulling out can be obtained. Further, since the space between the cushion 14 and the case 2 and the space between the cushion 14 and the housing 13 are filled with the adhesive, it is possible to prevent water from entering from the outside.

接着剤として例えばエポキシ樹脂系、アクリル樹脂系の接着剤などが使用できる。
クッション材料として、クッションは超音波送受信器から発生する超音波を遮音し、超音波送受信器を保持するための十分な弾性力を持つショアA硬度30〜60のシリコーンが使用出来る。
As the adhesive, for example, an epoxy resin-based or acrylic resin-based adhesive can be used.
As the cushion material, a silicone having a Shore A hardness of 30 to 60 having a sufficient elastic force for insulating the ultrasonic wave generated from the ultrasonic transceiver and holding the ultrasonic transceiver can be used as the cushion material.

内側の溝11と外側の溝12を貫通穴を設けて連結することで、接着剤注入部11aから注入された接着剤は、外側の溝12まで流れ込み、一度の接着剤注入で内側と外側の両面を接着することができる。貫通穴は、接着剤の流れ込みを考慮し、両面に流れ込む位置に設ける必要がある。貫通穴が複数設けてもよい。 By connecting the inner groove 11 and the outer groove 12 with a through hole, the adhesive injected from the adhesive injection portion 11a flows into the outer groove 12, and the inner and outer grooves are injected into the outer groove 12 once. Both sides can be bonded. The through hole needs to be provided at a position where it flows on both sides in consideration of the flow of the adhesive. A plurality of through holes may be provided.

外側の溝12をクッションのまわりを巻くようにスパイラル状にすることで、接着剤の流動性をあげることができる。
By making the outer groove 12 spiral so as to wrap around the cushion, the fluidity of the adhesive can be increased.

従来クッションを使用した超音波送受信装置の例Example of ultrasonic transmitter / receiver using conventional cushion 請求項1を実施したクッションの例An example of a cushion according to claim 1 請求項1を実施した超音波送受信装置の例An example of an ultrasonic transmission / reception apparatus according to claim 1 接着剤の流れAdhesive flow

1 両面電極の施された圧電素子
2 有底筒状ケース
3 素子側リード線
4 ケース側リード線
5 樹脂モールド
5a 金属ピン
6 スペーサー
7 吸音材
8 封止剤
9 クッション
10 ハウジング
11 外側の溝
11a 接着剤注入穴(外側)
12 内側の溝
12a 接着剤注入穴(内側)
13 接着剤注入穴のある治具
13a 治具の接着剤注入穴
14 溝のあるクッション
DESCRIPTION OF SYMBOLS 1 Piezoelectric element with double-sided electrode 2 Bottomed cylindrical case 3 Element side lead wire 4 Case side lead wire 5 Resin mold 5a Metal pin 6 Spacer 7 Sound absorbing material 8 Sealant 9 Cushion 10 Housing 11 Outer groove 11a Adhesion Agent injection hole (outside)
12 Inner groove 12a Adhesive injection hole (inside)
13 Jig with adhesive injection hole 13a Adhesive injection hole of jig 14 Cushion with groove

Claims (5)

外側が円筒状の金属または樹脂からなるケースに圧電素子を接着してなる超音波送受信器と、超音波送受信器を設置する為の筒状の開口部が設けられたハウジングと、前記超音波送受信器と前記ハウジングの間に前記超音波送受信器を覆うように設けられた円筒型クッションと、からなる超音波送受信装置において、円筒型クッションの内側または外側の少なくとも一方の面に接着剤を流し込む為の溝を設け、クッションの一端に設けられた接着剤注入部から溝に接着剤を流し込み、溝に流し込まれた接着剤によってクッションと超音波送受信器またはクッションとハウジングの少なくともいずれか一方が接着されていることを特徴とする超音波送受信装置 An ultrasonic transmitter / receiver in which a piezoelectric element is bonded to a case made of a cylindrical metal or resin on the outside, a housing provided with a cylindrical opening for installing the ultrasonic transmitter / receiver, and the ultrasonic transmitter / receiver An ultrasonic transmission / reception apparatus comprising: a cylindrical cushion provided to cover the ultrasonic transmission / reception unit between the container and the housing; and for pouring the adhesive into at least one of the inner and outer surfaces of the cylindrical cushion. The adhesive is poured into the groove from the adhesive injection portion provided at one end of the cushion, and at least one of the cushion and the ultrasonic transmitter / receiver or the cushion and the housing is bonded by the adhesive poured into the groove. Ultrasonic wave transmitting / receiving device 前記クッションの溝をクッションの円周上に設け、超音波送受信器とクッションまたはハウジングとクッション間から水が浸入する事を防ぐように超音波送受信器とクッションまたはクッションとハウジングの少なくとも一方を接着した
事を特徴とする請求項1に記載の超音波送受信装置
The cushion groove is provided on the circumference of the cushion, and at least one of the ultrasonic transceiver, the cushion, or the cushion and the housing is bonded so as to prevent water from entering between the ultrasonic transceiver, the cushion, or the housing and the cushion. The ultrasonic transmission / reception apparatus according to claim 1,
前記クッションに設けられた外側の溝と内側の溝がクッションの外側の面と内側の面の繋ぐように設けられた少なくとも1つの貫通穴によって繋がれていることを特徴とする請求項1または2に記載の超音波送受信装置 The outer groove and the inner groove provided in the cushion are connected by at least one through hole provided so as to connect the outer surface and the inner surface of the cushion. The ultrasonic transmitter / receiver described in 前述クッションに設けられた溝が、クッションを巻くように施されたスパイラル状の溝であることを特徴とする請求項1から3に記載の超音波送受信装置
4. The ultrasonic transmission / reception apparatus according to claim 1, wherein the groove provided in the cushion is a spiral groove provided so as to wind the cushion.
前述クッションがショアA硬度30〜60のシリコーンである事を特徴とする請求項1から4に記載の超音波送受信装置 5. The ultrasonic transmission / reception apparatus according to claim 1, wherein the cushion is made of silicone having a Shore A hardness of 30 to 60.
JP2010169408A 2010-07-28 2010-07-28 Ultrasonic transmitting/receiving apparatus Pending JP2012032167A (en)

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WO2021215177A1 (en) * 2020-04-21 2021-10-28 株式会社デンソー Ultrasonic sensor and vibration absorber

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WO2021215177A1 (en) * 2020-04-21 2021-10-28 株式会社デンソー Ultrasonic sensor and vibration absorber
JP2021173560A (en) * 2020-04-21 2021-11-01 株式会社デンソー Ultrasonic sensors and vibration absorbers
CN115461645A (en) * 2020-04-21 2022-12-09 株式会社电装 Ultrasonic sensor and vibration absorber
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