EP2839888A3 - Electroacoustic transducer - Google Patents

Electroacoustic transducer Download PDF

Info

Publication number
EP2839888A3
EP2839888A3 EP14177004.0A EP14177004A EP2839888A3 EP 2839888 A3 EP2839888 A3 EP 2839888A3 EP 14177004 A EP14177004 A EP 14177004A EP 2839888 A3 EP2839888 A3 EP 2839888A3
Authority
EP
European Patent Office
Prior art keywords
piezoelectric element
front body
electroacoustic transducer
face
rear body
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.)
Withdrawn
Application number
EP14177004.0A
Other languages
German (de)
French (fr)
Other versions
EP2839888A2 (en
Inventor
David Bartylla
Andre Gerlach
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2839888A2 publication Critical patent/EP2839888A2/en
Publication of EP2839888A3 publication Critical patent/EP2839888A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

Erfindungsgemäß ist ein elektroakustischer Wandler (1) vorgesehen, der als Dickenschwinger ausgebildet ist und demnach einen Vorderkörper (10) mit einer Bodenfläche (16) und einer Stirnfläche (14), mindestens ein scheibenförmiges piezoelektrisches Element (20) mit einer ersten Oberfläche (24) und einer zweiten Oberfläche (26) und einen Rückkörper (30) mit einer ersten Stirnfläche (38) und einer zweiten Stirnfläche (36) aufweist, wobei die Stirnfläche (14) des Vorderkörpers (10) an eine Membran (40) koppelbar ist. Die Bodenfläche (16) desVorderkörpers ist mit der ersten Oberfläche (24) des piezoelektrischen Elements (20) stoffschlüssig und/oder kraftschlüssig, verbunden und die zweite Stirnfläche (36) des Rückkörpers (30) ist mit der zweiten Oberfläche (26) des piezoelektrischen Elements (20) stoffschlüssig und/oder kraftschlüssig verbunden. Erfindungsgemäß ist vorgesehen, dass der Vorderkörper (10) und/oder das piezoelektrische Element (20) und/oder der Rückkörper (30) Zentrierelemente (12, 22, 32) aufweisen, wobei mittels der Zentrierelemente (12, 22, 32) der Vorderkörper (10), das piezoelektrische Element (20) und der Rückkörper (30) bei der Montage des elektroakustischen Wandlers an einer gemeinsamen Mittelachse (100) ausgerichtet werden.

Figure imgaf001
According to the invention, an electroacoustic transducer (1) is provided which is designed as a thickness oscillator and accordingly has a front body (10) with a bottom surface (16) and an end surface (14), at least one disk-shaped piezoelectric element (20) with a first surface (24). and a second surface (26) and a rear body (30) having a first end face (38) and a second end face (36), wherein the end face (14) of the front body (10) is couplable to a membrane (40). The bottom surface (16) of the front body is bonded and / or frictionally connected to the first surface (24) of the piezoelectric element (20) and the second end surface (36) of the rear body (30) is connected to the second surface (26) of the piezoelectric element (20) bonded cohesively and / or non-positively. According to the invention, it is provided that the front body (10) and / or the piezoelectric element (20) and / or the rear body (30) centering elements (12, 22, 32), wherein by means of the centering elements (12, 22, 32) of the front body (10), the piezoelectric element (20) and the rear body (30) are aligned during assembly of the electroacoustic transducer at a common center axis (100).
Figure imgaf001
EP14177004.0A 2013-08-19 2014-07-15 Electroacoustic transducer Withdrawn EP2839888A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013216380.0A DE102013216380A1 (en) 2013-08-19 2013-08-19 Electroacoustic transducer

Publications (2)

Publication Number Publication Date
EP2839888A2 EP2839888A2 (en) 2015-02-25
EP2839888A3 true EP2839888A3 (en) 2015-10-28

Family

ID=51176253

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14177004.0A Withdrawn EP2839888A3 (en) 2013-08-19 2014-07-15 Electroacoustic transducer

Country Status (2)

Country Link
EP (1) EP2839888A3 (en)
DE (1) DE102013216380A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016221535A1 (en) * 2016-11-03 2018-05-03 Robert Bosch Gmbh ultrasound transducer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065687A (en) * 1973-03-28 1977-12-27 Taga Electric Co., Ltd. Supersonic vibrator with means for detecting vibrating speed
US20060043840A1 (en) * 2004-09-01 2006-03-02 Impulse Devices Inc. Acoustic driver assembly with restricted contact area
US20100208553A1 (en) * 2008-07-24 2010-08-19 Donald Patrick Massa Hidden ultrasonic transducer with beam angle control for non-contact target detection systems
US8085621B2 (en) * 2008-07-24 2011-12-27 Massa Products Corporation Ultrasonic transducer with improved method of beam angle control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065687A (en) * 1973-03-28 1977-12-27 Taga Electric Co., Ltd. Supersonic vibrator with means for detecting vibrating speed
US20060043840A1 (en) * 2004-09-01 2006-03-02 Impulse Devices Inc. Acoustic driver assembly with restricted contact area
US20100208553A1 (en) * 2008-07-24 2010-08-19 Donald Patrick Massa Hidden ultrasonic transducer with beam angle control for non-contact target detection systems
US8085621B2 (en) * 2008-07-24 2011-12-27 Massa Products Corporation Ultrasonic transducer with improved method of beam angle control

Also Published As

Publication number Publication date
EP2839888A2 (en) 2015-02-25
DE102013216380A1 (en) 2015-03-12

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