KR900006323B1 - Iezoelectric ceramic acoustic transducer - Google Patents

Iezoelectric ceramic acoustic transducer Download PDF

Info

Publication number
KR900006323B1
KR900006323B1 KR1019870009213A KR870009213A KR900006323B1 KR 900006323 B1 KR900006323 B1 KR 900006323B1 KR 1019870009213 A KR1019870009213 A KR 1019870009213A KR 870009213 A KR870009213 A KR 870009213A KR 900006323 B1 KR900006323 B1 KR 900006323B1
Authority
KR
South Korea
Prior art keywords
acoustic transducer
metal diaphragm
support ring
annular groove
ceramic
Prior art date
Application number
KR1019870009213A
Other languages
Korean (ko)
Other versions
KR880003535A (en
Inventor
베트틀 게르트
Original Assignee
스테르터 운트 캄파니
엥그베르그 브렘스탈러
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 스테르터 운트 캄파니, 엥그베르그 브렘스탈러 filed Critical 스테르터 운트 캄파니
Publication of KR880003535A publication Critical patent/KR880003535A/en
Application granted granted Critical
Publication of KR900006323B1 publication Critical patent/KR900006323B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/02—Microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

The piezo-ceramic transducer includes a metal membrane (2) with a centre mounted ceramic disc (3) and a ring-shaped groove (4) running concentrically around its surface. The annular groove may be positioned close to the periphery of the ceramic disc (3) or further away from the disc, even as far out as the inner edge (8) of the membrane mounting ring (9). The mounting ring is made of a plastics material and is moulded onto the outer peripheral edge of the metal membrane during the course of the injection moulding process.

Description

압전세라믹 음향변환기Piezoceramic Acoustic Transducer

제1도는 본 발명의 음향변환기의 종단면도.1 is a longitudinal sectional view of an acoustic transducer of the present invention.

제2도는 본 발명의 다른 실시태양의 음향변환기의 사시도.2 is a perspective view of an acoustic transducer of another embodiment of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 음향변환기(acoustic transducer) 2:금속격막(metal diaphragm)1: acoustic transducer 2: metal diaphragm

3 : 세라믹판(ceramic plate) 4 : 환형 홈(annular groove)3: ceramic plate 4: annular groove

9 : 지지링 (support ring)9: support ring

본 발명은 그 중심부에 세라믹디스크(판)을 갖는 금속제 격막 및 상기 금속격막의 외주연에 형성된 지지링을 포함하여 구성된 압전세라믹 음향변환기(piezodectric ceramic acoustic transducer)에 관한 것이다.The present invention relates to a piezodectric ceramic acoustic transducer comprising a metal diaphragm having a ceramic disk (plate) at its center and a support ring formed on the outer circumference of the metal diaphragm.

압전세라믹 음향변환기를 제조하는 공지의 방법에 있어서는, 세라믹 디스크를 갖는 금속격막의 외주연부를 2부분의 합성물질 지지링 사이에 삽입하고 그들을 함께 초음파용접하는 것이 일반적이었다. 그러나 이러한 선행기술에 의하여 제조된 음향변환기에 있어서는, 두개의 지지링의 단순한 접점결합이 초음파용접 되지않은 부분들에서의 금속격막의 공동진동(covibration)을 초래했다. 이러한 결점은 금속격막이 지지링에 완전결합된 음향변환기를 제조하면 충분히 가능하나, 그러한 제조방법은 경비가 과다할뿐만 아니라 대량생산품목인 압전세라믹 음향변환기에는 적합치 못하다.In a known method of manufacturing piezoceramic acoustic transducers, it was common to insert the outer periphery of a metal diaphragm having a ceramic disk between two parts of a synthetic support ring and ultrasonically weld them together. However, in the acoustic transducer manufactured according to this prior art, the simple contact coupling of the two support rings caused the covibration of the metal diaphragm in the non-ultra-welded portions. This drawback is sufficient if a transducer is manufactured in which the metal diaphragm is completely coupled to the support ring, but such a manufacturing method is not only expensive but also not suitable for mass production piezoceramic transducers.

다른 방법으로서, 지지링이 금속격막위로 스프레이되는 것이 있는데, 이렇게 제조된 압전세라믹 음향 변환기는 큰 발진주파수(oscillation frequency) 및 만족한 정밀도를 갖지만 고유의 단점이 존재한다. 즉, 합성물질로된 링의 냉각과정에서 약간의 수축변형이 발생하는데, 이로인하여 금속격막이 한방향으로 약간 휘게된다. 이렇게 금속격막이 휘게되면 바람직하지 못한 음향이 발생되고 음향변환기에 의한 음의 재생에 교란효과가 초래된다.Alternatively, the support ring is sprayed onto the metal diaphragm. The piezoceramic acoustic transducer thus manufactured has a large oscillation frequency and satisfactory precision but has inherent disadvantages. That is, some shrinkage deformation occurs during cooling of the ring made of synthetic material, which causes the metal diaphragm to bend slightly in one direction. If the metal diaphragm is bent in this way, an undesirable sound is generated and a disturbing effect is caused in the reproduction of the sound by the sound transducer.

본 발명은 변형이 거의 없고 향상된 음질로 강의나 음악을 재생할 수 있으며 제조원가가 저렴하고 큰 영역의 발진주파수를 갖는 압전세라믹 음향변환기를 제공하고자 하는 것이다.The present invention seeks to provide a piezoceramic acoustic transducer which is hardly modified, can reproduce lectures or music with improved sound quality, and is inexpensive in manufacturing cost and has a large oscillation frequency.

이러한 본 발명의 목적은 지지링으로부터 떨어져 형성된 최소한 하나이상의 동심원적 환상홈(annulargroove)을 갖는 금속격막을 사용함으로써 달성될 수 있다.This object of the invention can be achieved by using a metal diaphragm having at least one concentric annular groove formed away from the support ring.

상기한 금속격막은 합성물질로 구성된 지지링의 냉각동안 격막에 전가되는 수축변형이 지지링과 가장바깥자리 환상홈사이의 금속격막 부분에는 전이되므로 상기 가장바깥자리 환상홈 내측의 격막부분은 응력을 받지않게 된다. 그리고 환상홈들로 인하여 더큰 강성이 금속격막에 전체적으로 부과된다.In the metal diaphragm, the contraction deformation imparted to the diaphragm during the cooling of the support ring made of synthetic material is transferred to the metal diaphragm portion between the support ring and the outermost annular groove so that the diaphragm portion inside the outermost annular groove is stressed. You will not receive. And because of the annular grooves, more rigidity is imposed on the metal diaphragm as a whole.

본 발명의 음향변환기에서는 지지링이 형성된 후에 금속격막내에 환상홈이 새겨지므로 매우 간단하며 경제적인 제조가 가능하다.In the acoustic transducer of the present invention, since the annular groove is carved into the metal diaphragm after the support ring is formed, a very simple and economical manufacturing is possible.

또한 전술하였듯이, 제조상 발생되는 응력이 금속격막의 바깥가장자리 영역으로 전이되므로 일종의 주파수 피크표출이 감소되고 매우 단순한 형태로서 소망되는 균일한 주파수대폭(frequency band width)이 얻어질 수 있다.In addition, as described above, since the stress generated during manufacture is transferred to the outer edge region of the metal diaphragm, a kind of frequency peak expression is reduced and a desired uniform frequency band width can be obtained as a very simple form.

한편, 본 발명의 압전세라믹 음향변환기에 있어서, 동심적 환상홈들의 깊이는 다양하게 변회시킬 수 있고, 다수의 홈들이 사용되는 경우 홈들 사이의 거리 및 홈과 지지링 사이의 거리 또한 다양하게 변화시킬 수 있다.On the other hand, in the piezoceramic acoustic transducer of the present invention, the depth of the concentric annular grooves can be varied in various ways, and when a plurality of grooves are used, the distance between the grooves and the distance between the groove and the support ring can also be varied. Can be.

이하에서 첨부도면과 함께 본 발명을 좀더 상세하게 설명한다. 제1도에는 하나의 환상홈을 가진 본 발명의 압전세라믹 음향변환기가 도시되어있다. 음향변환기 1은 원형의 얇은 세라믹관 3이 그 중심상에 배실된 금속격막 2를 포함하며, 상기 금속격막 2에는 환상홈 4가 형성되어 있고 그 외주연부에는 지지령 9가 부착되어 있다. 본 실시예에서는 환상홈 4가 금속격막 2의 바깥가장자리 7로부터 비교적 멀리 띨어져(간격 5)형성되어 있으나, 이것을 격막 2를 수용하는 지지링 9의 내측 가장자리 8에 매우 가깝도록 위치시킬 수도있다. 지지령 9는 합성수지와 같은 합성물질로 구성되는데, 금속격막 외주연부에 사출성형의 방법에 의하여 형성된다. 본 실시예의 음향변환기에서는 세라믹판 3의 원주가 환상홈 4의 내측 가장자리와 거의 일치하도록 하였으나 이또한 변화시킬 수 있다.Hereinafter, the present invention will be described in more detail with the accompanying drawings. 1 shows a piezoceramic acoustic transducer of the present invention having one annular groove. The acoustic transducer 1 includes a metal diaphragm 2 having a circular thin ceramic tube 3 disposed on its center, and an annular groove 4 is formed in the metal diaphragm 2, and a support order 9 is attached to the outer periphery thereof. In this embodiment, the annular groove 4 is formed to be relatively far from the outer edge 7 of the metal diaphragm 2 (interval 5), but it may be positioned to be very close to the inner edge 8 of the support ring 9 which accommodates the diaphragm 2. Support Directive 9 consists of a synthetic material such as a synthetic resin, which is formed at the outer periphery of the metal diaphragm by injection molding. In the acoustic transducer of this embodiment, the circumference of the ceramic plate 3 almost coincides with the inner edge of the annular groove 4, but this can also be changed.

제2도에는 본 발명의 다른 구현에 따른 압전세라믹 음향변환기가 도시되어있다. 여기서는 금속격막 2가상호간격 10만큼 떨어져 위치하는 두개의 동심원적 환상홈들 4를 갖도록 구성되어 있으며 나머지는 제1도의 압전세라믹 음향변환기와 동일하게 구성되어있다.2 shows a piezoceramic acoustic transducer according to another embodiment of the present invention. In this case, it is configured to have two concentric annular grooves 4 spaced apart by the metal diaphragm bivalent spacing 10, and the rest is configured identically to the piezoceramic acoustic transducer of FIG.

상기 두가지 경우 모두에 있어서, 홈 4는 격막 2에 지지링 9가 형성된 후에 금속격막 2위에 새겨지는데,이렇게 함으로서 합성물질로된 지지링 9의 수축에서 발생되는 응력이 금속격막으로 전가되지않고 만족할만한 음재생능이 갖추어진다.In both cases, the groove 4 is engraved on the metal diaphragm 2 after the support ring 9 is formed in the diaphragm 2 so that the stress generated in the contraction of the support ring 9 made of synthetic material is not transferred to the metal diaphragm and is satisfactory. Sound reproduction capability is provided.

Claims (4)

금속격막, 상기 금속격막의 중심부에 배설되는 세라믹판 및 그 외주연부에 형성된 지지링으로 구성되는 압전세라믹 음향변환기에 있어서, 상기 금속격막(2)이 상기 세라믹판(3)과 지지링(9) 사이에 위치하는 최소한 하나이상의 동심원적 환상홈(4)을 갖추고 있음을 특징으로 하는 압전세라믹 음향변환기.In a piezoceramic acoustic transducer composed of a metal diaphragm, a ceramic plate disposed at the center of the metal diaphragm, and a support ring formed at an outer periphery thereof, the metal diaphragm 2 includes the ceramic plate 3 and the support ring 9. Piezoceramic acoustic transducer, characterized in that it has at least one concentric annular groove (4) positioned between. 제1항에 있어서, 상기 환상홈(4)이, 상기 금속격막(2)에 지지링(9)이 형성된 후, 격막위에 형성된 것임을 특징으로 하는 압전세라믹 음향변환기.The piezoceramic acoustic transducer according to claim 1, wherein the annular groove (4) is formed on the diaphragm after the support ring (9) is formed in the metal diaphragm (2). 제1항에 있어서, 상기 환상홈(4)의 깊이가 다양하게 변화될 수 있는 것임을 특징으로 하는 압전세라믹 음향변환기.The piezoceramic acoustic transducer according to claim 1, wherein the depth of the annular groove (4) can be varied. 제1항에 있어서, 상기 지지링(9)으로부터 상기 환상홈(4)까지의 거리가 다양하게 변화될 수 있는 것임을 특징으로 하는 압전세라믹 음향변환기.The piezoceramic acoustic transducer according to claim 1, wherein the distance from the support ring (9) to the annular groove (4) can be varied.
KR1019870009213A 1986-08-27 1987-08-24 Iezoelectric ceramic acoustic transducer KR900006323B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEP3629093.9 1986-08-27
DE19863629093 DE3629093A1 (en) 1986-08-27 1986-08-27 PIEZOCERAMIC SOUND CONVERTER
DE3629093.9 1986-08-27

Publications (2)

Publication Number Publication Date
KR880003535A KR880003535A (en) 1988-05-17
KR900006323B1 true KR900006323B1 (en) 1990-08-28

Family

ID=6308271

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870009213A KR900006323B1 (en) 1986-08-27 1987-08-24 Iezoelectric ceramic acoustic transducer

Country Status (5)

Country Link
EP (1) EP0264557A3 (en)
JP (1) JPS6367900A (en)
KR (1) KR900006323B1 (en)
DE (1) DE3629093A1 (en)
IL (1) IL83648A0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02234600A (en) * 1989-03-07 1990-09-17 Mitsubishi Mining & Cement Co Ltd Piezoelectric conversion element
JP3360558B2 (en) * 1997-01-06 2002-12-24 株式会社村田製作所 Piezoelectric electroacoustic transducer
GB2348564B (en) * 1999-04-01 2003-06-18 Thomson Marconi Sonar Ltd Transducers

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR854121A (en) * 1938-12-14 1940-04-05 Csf Improvements to electromechanical vibrating devices
DE1112548B (en) * 1960-02-01 1961-08-10 Krone Kg Speech capsule for telecommunication purposes
US4056742A (en) * 1976-04-30 1977-11-01 Tibbetts Industries, Inc. Transducer having piezoelectric film arranged with alternating curvatures
FR2394512A1 (en) * 1977-06-14 1979-01-12 Rhone Poulenc Ind PROCESS FOR THE SEPARATION OF ACRYLIC ACID FROM ITS SOLUTIONS IN TRI-N-BUTYL PHOSPHATE
DE3041742C2 (en) * 1980-11-05 1982-10-28 Siemens AG, 1000 Berlin und 8000 München Airborne sounder
JPS5781799A (en) * 1980-11-10 1982-05-21 Murata Mfg Co Ltd Piezo-electric speaker

Also Published As

Publication number Publication date
EP0264557A2 (en) 1988-04-27
DE3629093A1 (en) 1988-03-10
IL83648A0 (en) 1988-01-31
EP0264557A3 (en) 1989-12-06
KR880003535A (en) 1988-05-17
JPS6367900A (en) 1988-03-26

Similar Documents

Publication Publication Date Title
GB2106353A (en) An electromechanical speaker and a method of assembling an electromechanical speaker
US4020299A (en) Electro-acoustic transducer diaphragms
US4249043A (en) Electret transducer backplate, electret transducer and method of making an electret transducer
KR900006323B1 (en) Iezoelectric ceramic acoustic transducer
GB968951A (en) Foamed plastic diaphragm for sound transducers
US1080953A (en) Diaphragm for sound-boxes.
KR930022346A (en) Injection Molding Molds for Hub Attached Optical Discs and Disk Substrates
US4302695A (en) Support arrangement for a flexible sound generating diaphragm
US3814864A (en) Condenser microphone having a plurality of discrete vibratory surfaces
US2115924A (en) Acoustic apparatus
US7418109B2 (en) Diaphragm structure of light sound converter
JPS6230388Y2 (en)
JPS6312398Y2 (en)
US1738853A (en) Diaphragm for transmitters and receivers
KR820001100Y1 (en) Acoustic transducer
JPH024555Y2 (en)
US1182078A (en) Sound-box diaphragm.
KR200292331Y1 (en) Modified structure for loudspeaker
KR870004136Y1 (en) Loudspeaker diaphram
US1174996A (en) Sound-box for phonographs.
JPS61116499A (en) Loudspeaker
US1573874A (en) Apparatus for the reproduction of sounds
US1177025A (en) Diaphragm.
JPH0141272Y2 (en)
JPS6220759B2 (en)

Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee