EP0909223B1 - Ultrasonic transducer with contact member - Google Patents

Ultrasonic transducer with contact member Download PDF

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Publication number
EP0909223B1
EP0909223B1 EP97929161A EP97929161A EP0909223B1 EP 0909223 B1 EP0909223 B1 EP 0909223B1 EP 97929161 A EP97929161 A EP 97929161A EP 97929161 A EP97929161 A EP 97929161A EP 0909223 B1 EP0909223 B1 EP 0909223B1
Authority
EP
European Patent Office
Prior art keywords
ultrasonic transducer
oscillating element
contact springs
transducer according
oscillating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97929161A
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German (de)
French (fr)
Other versions
EP0909223A1 (en
Inventor
Johann Meier
Karl-Heinz Zoller
Thomas Handschiegel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Schalter und Sensoren GmbH
Original Assignee
Valeo Schalter und Sensoren GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP0909223A1 publication Critical patent/EP0909223A1/en
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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • B06B1/0662—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface
    • B06B1/0681—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface and a damping structure
    • B06B1/0685—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface and a damping structure on the back only of piezoelectric elements

Definitions

  • the invention relates to an ultrasonic transducer, particularly for distance warning systems on motor vehicles.
  • Such transducers are provided with a piezo disk, which is set in vibration by applying a voltage. These vibrations are transmitted to a vibrating element, it being known to lead at least one of the electrical connecting lines via the vibrating element to the piezo disk.
  • a vibrating element it being known to lead at least one of the electrical connecting lines via the vibrating element to the piezo disk.
  • Such a construction is shown for example in German patent application 196 01 656.8.
  • a disadvantage of such transducers is that the electrical lines either have to be soldered directly to the piezo element or at least partially guided through the vibration element, which is preferably made of aluminum. This means that a permanent electrical connection between the feed line and the vibrating element or the piezo disk must be created.
  • the electrical line is soldered directly to the piezo disk or the line is inserted into a groove of the vibration element made of aluminum and caulked there. Both electrical connections can be critical and are less suitable for automatic execution.
  • Another disadvantage is that the transducer is regularly provided with a damping element arranged above the disc within the oscillating element. It must therefore also be ensured that the electrical connection lines are passed through corresponding holes in the damping element, which further complicates simplified production.
  • DE-OS 38 26 799 it has already been proposed to create the connection by means of contact pins which can be inserted into one another, but the ends of the contact pins in turn also have to be permanently connected to the piezo crystal.
  • an ultrasonic transducer in which an electrical circuit in the form of a printed circuit board is inserted.
  • protruding elastic contact arms are attached, which are placed under prestress on assigned connection points in the converter.
  • the contact arms are soldered to the circuit board and are guided through the circuit board through assigned openings after the soldering process.
  • the printed circuit board is held within a holding pot. With regard to contacting, this results in a comparatively complex construction.
  • the invention is therefore based on an ultrasound migrator of the type resulting from the preamble of claim 1.
  • the object of the invention is to simplify the contacting of such transducers and to facilitate mechanical production.
  • the object is achieved by the combination of features resulting from the characterizing part of claim 1.
  • the invention therefore consists in providing a special composite body for contacting, with which the contact springs are cast and thus find a firm hold.
  • the invention allows a number of advantageous developments, which are explained below.
  • This measure serves to guide contact springs and to give them a firm hold within the oscillating element.
  • connection body is selected in its outer shape such that it can be pressed into the interior of the cup-shaped vibrating element and is thus permanently anchored in the interior. In this way, the necessary support for the spring contacts cast with the connecting body is created, so that they can rest on the piezo disk with a considerable contact force and thus ensure good contact.
  • the contact spring is guided in its central section in the edge region and coaxially to this of the connecting body, so that there are short distances.
  • Good contact is made with the inner lateral surface of the oscillating element in that the contact on the end of the connecting body facing the piezo disk is bent back in a U-shape, so that the protruding first end can contact the electrically conductive inner lateral surface of the oscillating element over a longer area .
  • a particular advantage can be achieved in that the connecting body is simultaneously used as a damping body for the transducer by producing material that dampens it from suitable vibrations.
  • annular connecting body 1 which can also be designed as a solid body and is preferably formed from damping material.
  • Two contact springs 3, 4 are injected into the wall surface of the connecting body 1.
  • the first ends 5 of the contact springs 3 and 4 serve for the solder connection of connecting lines which are led out of the converter, not shown in the drawing.
  • the free second end 6 of the contact spring 3 is bent into a U-shape at the lower end of the ring and protrudes somewhat from the outer surface of the connecting body 1.
  • an elastic contact surface is created which bears on the inner lateral surface of the oscillating element (not shown) made of conductive metal (aluminum) with good electrical contact.
  • the free end of the contact spring 4 bifurcates into the free second ends 7 and 8, which protrude slightly obliquely at an angle to the bottom plane of the connecting body, so that they can rest with good contact on the bottom of the hollow-cylindrical oscillating element and a good one for this have electrical contact.
  • FIGS. 5 and 6 show at the first ends 5 of the contact springs 3 and 4 soldered connecting lines 10 and 11.
  • the contact spring 4 is not bifurcated at its lower end, but has only a single free second end 7.
  • the free second end 6 of the contact spring 3 does not protrude freely from the receiving groove in the lateral surface of the connecting body, but is caught in this groove with its end region, so that the free end 6 bulges out of the groove and with its contour over the lateral surface of the connecting body 1 for contacting the oscillating element protrudes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Vibration Prevention Devices (AREA)
  • Cookers (AREA)

Description

Die Erfindung betrifft einen Ultraschallwandler, insbesondere für Abstandswarnanlagen an Kraftfahrzeugen. Derartige Wandler sind mit einer Piezoscheibe versehen, die durch Anlegen einer Spannung in Schwingungen versetzt wird. Diese Schwingungen werden auf ein Schwingelement übertragen, wobei es bekannt ist, zumindest eine der elektrischen Verbindungsleitungen über das Schwingelement zu der Piezoscheibe zu führen. Eine derartige Konstruktion ist beispielsweise in der deutschen Patentanmeldung 196 01 656.8 gezeigt.The invention relates to an ultrasonic transducer, particularly for distance warning systems on motor vehicles. Such transducers are provided with a piezo disk, which is set in vibration by applying a voltage. These vibrations are transmitted to a vibrating element, it being known to lead at least one of the electrical connecting lines via the vibrating element to the piezo disk. Such a construction is shown for example in German patent application 196 01 656.8.

Nachteilig bei derartigen Wandlern ist es, daß die elektrischen Leitungen entweder direkt mit dem Piezoelement verlötet werden müssen oder zumindest teilweise über das vorzugsweise aus Aluminium bestehende Schwingelement geführt werden. Das bedeutet, daß eine dauerhafte elektrische Verbindung zwischen der Zuführungsleitung und dem Schwingelement bzw. der Piezoscheibe geschaffen werden muß. Bei bekannten Lösungen wird die elektrische Leitung direkt mit der Piezoscheibe verlötet bzw. die Leitung in eine Nut des aus Aluminium bestehenden Schwingungselementes eingeführt und dort verstemmt. Beide elektrische Verbindungen können kritisch sein und sind für eine automatische Durchführung weniger geeignet. Ein weiterer Nachteil besteht darin, daß der Wandler regelmäßig mit einem oberhalb der Scheibe angeordneten Dämpfungselement innerhalb des Schwingelementes versehen ist. Es muß also zusätzlich noch dafür gesorgt werden, daß die elektrischen Verbindungsleitungen durch entsprechende Bohrungen des Dämpfungselementes geführt werden, was eine vereinfachte Fertigung weiter erschwert. In der vorbekannten DE-OS 38 26 799 ist bereits vorgeschlagen worden, die Verbindung durch ineinander fügbare Kontaktstifte zu schaffen, wobei aber auch die Enden der Kontaktstifte wiederum dauerhaft mit dem Piezokristall verbunden werden müssen.A disadvantage of such transducers is that the electrical lines either have to be soldered directly to the piezo element or at least partially guided through the vibration element, which is preferably made of aluminum. This means that a permanent electrical connection between the feed line and the vibrating element or the piezo disk must be created. In known solutions, the electrical line is soldered directly to the piezo disk or the line is inserted into a groove of the vibration element made of aluminum and caulked there. Both electrical connections can be critical and are less suitable for automatic execution. Another disadvantage is that the transducer is regularly provided with a damping element arranged above the disc within the oscillating element. It must therefore also be ensured that the electrical connection lines are passed through corresponding holes in the damping element, which further complicates simplified production. In the previously known DE-OS 38 26 799 it has already been proposed to create the connection by means of contact pins which can be inserted into one another, but the ends of the contact pins in turn also have to be permanently connected to the piezo crystal.

Einfügunginsertion

Aus der GB-OS 2 128 399 ist ein Ultraschallwandler bekannt, in den eine elektrische Schaltung in Form einer Leiterplatte eingesetzt ist. An der Leiterplatte selbst sind vorstehende elastische Kontaktarme angebracht, die unter Vorspannung auf zugeordneten Anschlußpunkten in dem Wandler aufsetzen. Die Kontaktarme sind mit der Leiterplatte verlötet und werden nach dem Lötvorgang durch zugeordnete Öffnungen durch die Leiterplatte geführt. Um die Leiterplatte innerhalb des Wandlertopfes ausrichten zu können, wird die Leiterplatte innerhalb eines Haltetopfs gefaßt. Hinsichtlich der Kontaktgabe ergibt sich somit eine vergleichsweise aufwendige Konstruktion.From GB-OS 2 128 399 an ultrasonic transducer is known in which an electrical circuit in the form of a printed circuit board is inserted. On the circuit board itself, protruding elastic contact arms are attached, which are placed under prestress on assigned connection points in the converter. The contact arms are soldered to the circuit board and are guided through the circuit board through assigned openings after the soldering process. In order to be able to align the printed circuit board within the converter pot, the printed circuit board is held within a holding pot. With regard to contacting, this results in a comparatively complex construction.

Die Erfindung geht daher aus von einem Ultraschallwander der sich aus dem Oberbegriff des Anspruchs 1 ergebenden Gattung.The invention is therefore based on an ultrasound migrator of the type resulting from the preamble of claim 1.

Aufgabe der Erfindung ist es, die Kontaktierung derartiger Wandler zu vereinfachen und die maschinelle Fertigung zu erleichtern. Die Aufgabe wird durch die sich aus dem kennzeichnenden Teil des Anspruchs 1 ergebende Merkmalskombination gelöst. Die Erfindung besteht im Prinzip also darin, für die Kontaktgabe einen speziellen Verbundkörper vorzusehen, mit welchem die Kontaktfedern vergossen sind und somit einen festen Halt finden. Die Erfindung läßt eine Reihe von vorteilhaften Weiterbildungen zu, welche nachfolgend erläutert werden.The object of the invention is to simplify the contacting of such transducers and to facilitate mechanical production. The object is achieved by the combination of features resulting from the characterizing part of claim 1. In principle, the invention therefore consists in providing a special composite body for contacting, with which the contact springs are cast and thus find a firm hold. The invention allows a number of advantageous developments, which are explained below.

Diese die Maßnahme dient dazu Kontaktfedern zu führen und diesen einen festen Halt innerhalb des Schwingelementes zu geben.This measure serves to guide contact springs and to give them a firm hold within the oscillating element.

Eine einfache Halterung des Verbindungskörpers innerhalb des Schwingelementes ist durch die Merkmale nach Anspruch 2 beschrieben. Danach wird der Verbindungskörper in seiner äußeren Formgebung derart gewählt, daß er sich in den Innenraum des topfförmigen Schwingelementes einpressen läßt und so in dem Innenraum dauerhaft verankert ist. Auf diese Weise wird auch die notwendige Abstützung für die mit dem Verbindungskörper vergossenen Federkontakte geschaffen, so daß diese mit einer erheblichen Auflagekraft auf der Piezoscheibe aufliegen können und so für eine gute Kontaktgabe sorgen.An easy one Holding the connecting body within the vibrating element is described by the features of claim 2. Then the connecting body is selected in its outer shape such that it can be pressed into the interior of the cup-shaped vibrating element and is thus permanently anchored in the interior. In this way, the necessary support for the spring contacts cast with the connecting body is created, so that they can rest on the piezo disk with a considerable contact force and thus ensure good contact.

Soll die Kontaktgabe noch verbessert und sicherer gemacht werden, so empfiehlt sich in Weiterbildung der Erfindung die Anwendung der Merkmale nach Anspruch 3. Dadurch kann selbst immer noch dann eine gute elektrische Verbindung zwischen dem Federkontakt und der Piezoscheibe bzw. dem Schwingelement geschaffen werden, wenn die Kontaktgabe eines der ersten Kontaktfederenden nachläßt. Soll'der Verbindungskörper nur ein geringes Volumen haben, so wird man in vorteilhafter Weiterbildung gemäß Anspruch 5 diesen ringförmig machen. Für eine Reihe von Fällen, insbesondere der Merkmalskombination nach Anspruch 6 wird es sich aber empfehlen, dem Verbindungskörper die Form eines Vollzylinders zu geben. Für eine verbesserte Kontaktgabe zwischen der betreffenden Kontaktfeder und dem Schwingelement kann entsprechend der Merkmalskombination nach Anspruch 4 gesorgt werden. Danach wird die Kontaktfeder in ihrem mittleren Abschnitt im Randbereich und koaxial zu diesem des Verbindungskörpers geführt, so daß sich hier kurze Wege ergeben. Für eine gute Kontaktierung mit der inneren Mantelfläche des Schwingelementes wird dadurch gesorgt, daß der Kontakt an dem der Piezoscheibe zugewandten Ende des Verbindungskörpers U-förmig zurückgebogen wird, so daß das vorstehende erste Ende über einen längeren Bereich die elektrisch leitende innere Mantelfläche des Schwingelementes kontaktieren kann.If the contact is to be improved and made safer, then in a further development of the invention the use of the features according to claim 3 is recommended. As a result, a good electrical connection can still be created between the spring contact and the piezo disk or the oscillating element when the Contacting one of the first contact spring ends decreases. Should the connecting body have only a small volume, it will be made ring-shaped in an advantageous further development according to claim 5. For a number of cases, in particular the combination of features according to claim 6, it will be advisable to give the connecting body the shape of a solid cylinder. For an improved contact between the relevant contact spring and the oscillating element can be ensured according to the combination of features according to claim 4. Then the contact spring is guided in its central section in the edge region and coaxially to this of the connecting body, so that there are short distances. Good contact is made with the inner lateral surface of the oscillating element in that the contact on the end of the connecting body facing the piezo disk is bent back in a U-shape, so that the protruding first end can contact the electrically conductive inner lateral surface of the oscillating element over a longer area .

Ein besonderer Vorteil läßt sich dadurch erreichen, daß man den Verbindungskörper gleichzeitig als Dämpfungskörper für den Wandler verwendet, indem man ihm aus geeigneten Schwingungen dämpfendem Material herstellt.A particular advantage can be achieved in that the connecting body is simultaneously used as a damping body for the transducer by producing material that dampens it from suitable vibrations.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung erläutert. Darin zeigt:

Fig. 1
in seitlicher Ansicht ein erstes Ausführungsbeispiel,
Fig. 2
das Ausführungsbeispiel nach Fig. 1 perspektivisch von unten gesehen,
Fig. 3
das Ausführungsbeispiel nach Fig. 1 in seitlich gedrehter Lage,
Fig. 4
Fig. 3 in einer Ansicht direkt von unten gesehen,
Fig. 5
in perspektivischer Lage von unten ein zweites Ausführungsbeispiel und
Fig. 6
in seitlicher perspektivischer Ansicht das Ausführungsbeispiel nach Fig. 5.
An embodiment of the invention is explained below with reference to the drawing. It shows:
Fig. 1
a first embodiment in side view,
Fig. 2
1 seen in perspective from below,
Fig. 3
1 in a laterally rotated position,
Fig. 4
3 seen in a view directly from below,
Fig. 5
in a perspective position from below a second embodiment and
Fig. 6
5 shows a side perspective view of the exemplary embodiment according to FIG. 5.

In den Fig. 1 bis 4 ist ein ringförmiger Verbindungskörper 1 gezeigt, der auch als Vollkörper ausgestaltet sein kann und vorzugsweise aus Dämpfungsmaterial gebildet ist. In die Wandfläche des Verbindungskörpers 1 sind zwei Kontaktfedern 3,4 eingespritzt. Die ersten Enden 5 der Kontaktfedern 3 und 4 dienen zum Lötanschluß von Verbindungsleitungen, die aus dem in der Zeichnung nicht dargestellten Wandler herausgeführt sind. Das freie zweite Ende 6 der Kontaktfeder 3 ist am unteren Ende des Ringes U-förmig umgebogen und steht etwas von der Mantelfläche des Verbindungskörpers 1 ab. Auf diese Weise wird eine elastische Kontaktfläche geschaffen, die an der inneren Mantelfläche des aus leitendem Metall (Aluminium) bestehenden, nicht dargestellten Schwingelementes mit gutem elektrischem Kontakt anliegt. Das freie Ende der Kontaktfeder 4 gabelt sich in die freien zweiten Enden 7 und 8, die im Winkel zu der Bodenebene des Verbindungskörpers etwas schräg verlaufend elastisch abstehen, so daß sie mit gutem Kontakt auf dem Boden des hohlzylinderförmigen Schwingelementes anliegen können und zu diesem eine gute elektrische Kontaktgabe besitzen.1 to 4, an annular connecting body 1 is shown, which can also be designed as a solid body and is preferably formed from damping material. Two contact springs 3, 4 are injected into the wall surface of the connecting body 1. The first ends 5 of the contact springs 3 and 4 serve for the solder connection of connecting lines which are led out of the converter, not shown in the drawing. The free second end 6 of the contact spring 3 is bent into a U-shape at the lower end of the ring and protrudes somewhat from the outer surface of the connecting body 1. On In this way, an elastic contact surface is created which bears on the inner lateral surface of the oscillating element (not shown) made of conductive metal (aluminum) with good electrical contact. The free end of the contact spring 4 bifurcates into the free second ends 7 and 8, which protrude slightly obliquely at an angle to the bottom plane of the connecting body, so that they can rest with good contact on the bottom of the hollow-cylindrical oscillating element and a good one for this have electrical contact.

Das Ausführungsbeispiel nach den Fig. 5 und 6 wird nur insoweit beschrieben, als es die Unterschiede zu dem ersten Ausführungsbeispiel betrifft. Fig. 5 und 6 zeigt an die ersten Enden 5 der Kontaktfedern 3 und 4 angelötete Verbindungsleitungen 10 und 11. Die Kontaktfeder 4 ist an ihrem unteren Ende nicht gegabelt, sondern besitzt nur ein einziges freies zweites Ende 7. Das freie zweite Ende 6 der Kontaktfeder 3 steht aus der Aufnahmenut in der Mantelfläche des Verbindungskörper nicht frei ab, sondern ist in dieser Nut mit seinem Endbereich gefangen, so daß das freie Ende 6 sich aus der Nut herauswölbt und mit seiner Kontur über die Mantelfläche des Verbindungskörpers 1 zur Kontaktgabe mit dem Schwingelement vorsteht.The embodiment according to FIGS. 5 and 6 is only described insofar as it relates to the differences from the first embodiment. 5 and 6 show at the first ends 5 of the contact springs 3 and 4 soldered connecting lines 10 and 11. The contact spring 4 is not bifurcated at its lower end, but has only a single free second end 7. The free second end 6 of the contact spring 3 does not protrude freely from the receiving groove in the lateral surface of the connecting body, but is caught in this groove with its end region, so that the free end 6 bulges out of the groove and with its contour over the lateral surface of the connecting body 1 for contacting the oscillating element protrudes.

Claims (6)

  1. Ultrasonic transducer, in particular for distance warning devices in motor vehicles, with a housing that is fitted with a receptacle for a pot-shaped oscillating element, with such oscillating element exhibiting a circumferential lateral wall and bearing a piezoelectric disc on its bottom surface, which serves as a membrane, and with said piezoelectric disc and preferably said oscillating element being fitted with contacts for electric connecting leads, with the contacts being formed by contact springs (3, 4), wherein the second ends (6, 7, 8) of the contact springs are adapted to bear against said piezoelectric disc and/or said oscillating element and the connecting leads (10, 11) are connected to the free ends (5) of the contact springs (3, 4), characterized in that the contact springs (3, 4) are fastened by casting to a cylinder-shaped connecting element (1) from which the ends (5, 6, 7, 8) protrude or arch about.
  2. Ultrasonic transducer according to claim 1, characterized in that the connecting element (1) is pressed into the oscillating element and supports itself on the oscillating element through frictional force in relation to an inner lateral surface of the oscillating element and, is held in position by the elastic force of the contacting ends of the contact springs.
  3. Ultrasonic transducer according to claim 1 or 2, characterized in that the end bearing against the piezoelectric disc branches into two free second ends (7, 8) or is formed by two free ends of two parallel contact springs (4).
  4. Ultrasonic transducer according to one of the preceding claims, characterized in that the first free end (6) assigned to the oscillating element is bent parallel to the inner lateral surface of the oscillating element.
  5. Ultrasonic transducer according to claim 1 to 4, characterized in that the connecting element (1) is ringshaped or cylinder-shaped and the contact springs (3, 4) essentially run coaxially within the connecting element and preferably in its edge area.
  6. Ultrasonic transducer according to one of the preceding claims, characterized in that the connecting element is designed as a damping element for the transducer and is made of suitable material.
EP97929161A 1996-07-01 1997-06-10 Ultrasonic transducer with contact member Expired - Lifetime EP0909223B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19626293 1996-07-01
DE19626293A DE19626293A1 (en) 1996-07-01 1996-07-01 Ultrasonic transducer with contact element
PCT/EP1997/003019 WO1998000242A1 (en) 1996-07-01 1997-06-10 Ultrasonic transducer with contact member

Publications (2)

Publication Number Publication Date
EP0909223A1 EP0909223A1 (en) 1999-04-21
EP0909223B1 true EP0909223B1 (en) 2001-09-19

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Application Number Title Priority Date Filing Date
EP97929161A Expired - Lifetime EP0909223B1 (en) 1996-07-01 1997-06-10 Ultrasonic transducer with contact member

Country Status (6)

Country Link
US (1) US6163505A (en)
EP (1) EP0909223B1 (en)
DE (2) DE19626293A1 (en)
ES (1) ES2160960T3 (en)
HU (1) HUP9904041A2 (en)
WO (1) WO1998000242A1 (en)

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CN102598331B (en) * 2009-11-09 2015-03-25 皇家飞利浦电子股份有限公司 Curved ultrasonic hifu transducer with compliant electrical connections
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DE102013111319B4 (en) * 2013-10-14 2019-10-10 Ge Sensing & Inspection Technologies Gmbh Ultrasonic test head with novel electrical contacting of a comprehensive ultrasonic transducer and method for producing a test head according to the invention
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WO1998000242A1 (en) 1998-01-08
EP0909223A1 (en) 1999-04-21
US6163505A (en) 2000-12-19
HUP9904041A2 (en) 2000-03-28
DE59704677D1 (en) 2001-10-25
DE19626293A1 (en) 1998-01-08
ES2160960T3 (en) 2001-11-16

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