JPH0571000B2 - - Google Patents
Info
- Publication number
- JPH0571000B2 JPH0571000B2 JP59150047A JP15004784A JPH0571000B2 JP H0571000 B2 JPH0571000 B2 JP H0571000B2 JP 59150047 A JP59150047 A JP 59150047A JP 15004784 A JP15004784 A JP 15004784A JP H0571000 B2 JPH0571000 B2 JP H0571000B2
- Authority
- JP
- Japan
- Prior art keywords
- insulator
- resistance
- fluid layer
- sound hole
- diaphragm
- 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
Links
- 239000012212 insulator Substances 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims 2
- 239000000463 material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、例えば電話器の送受話器に用いる圧
電型変換器に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a piezoelectric transducer used, for example, in a telephone handset.
従来の構成とその問題点
第１図は、従来の圧電型変換器を示している。
以下にこの従来例の構成について第１図とともに
説明する。第１図において、１は金属板、２は圧
電素子であり、前記金属板１に接合され振動板を
構成している。３は絶縁体、４はスペーサリン
グ、５はケース、６は音響抵抗材である。７はリ
ード線、８，９は電気信号用の端子である。１０
は前気室、１１は背気室、１２は背面音孔、１３
は前面音孔である。Conventional configuration and its problems FIG. 1 shows a conventional piezoelectric transducer.
The configuration of this conventional example will be explained below with reference to FIG. 1. In FIG. 1, 1 is a metal plate, and 2 is a piezoelectric element, which is joined to the metal plate 1 to form a diaphragm. 3 is an insulator, 4 is a spacer ring, 5 is a case, and 6 is an acoustic resistance material. 7 is a lead wire, and 8 and 9 are terminals for electrical signals. 10
is the front air chamber, 11 is the back air chamber, 12 is the back sound hole, 13
is the front sound hole.
次に、上記従来例の動作について説明する。第
２図は上記従来例の受話器として動作させた場合
の等価回路を示す。第２図において、r0、m0、s0
は振動板の抵抗、等価質量、ステイフネス、S1は
背気室１１のステイフネス、m1は背面音孔１２
の等価質量、R1は音響抵抗材６の抵抗、Shは前
気室１０のステイフネス、mhは前面音孔１３の
等価質量、Scは、この圧電型変換器を受話器と
して動作させた際の測定用カツプラのステイフネ
スである。Ｐは出力音圧、Ｓは振動板面積、Ｆは
供給電気信号により発生する駆動力である。 Next, the operation of the above conventional example will be explained. FIG. 2 shows an equivalent circuit when the above conventional telephone receiver is operated. In Figure 2, r 0 , m 0 , s 0
is the resistance, equivalent mass, and stiffness of the diaphragm, S 1 is the stiffness of the back air chamber 11, and m 1 is the back sound hole 12.
R1 is the resistance of the acoustic resistance material 6, Sh is the stiffness of the front air chamber 10, mh is the equivalent mass of the front sound hole 13, and Sc is the measurement when this piezoelectric transducer is operated as a receiver. This is the stiffness of Katsupura. P is the output sound pressure, S is the area of the diaphragm, and F is the driving force generated by the supplied electric signal.
この等価回路において、音響抵抗材６の抵抗
R1を適当な値に設定して周波数の平坦特性を得
る。しかし、この音響抵抗材６の抵抗値にはバラ
ツキが大きく、このバラツキがそのまま特性のバ
ラツキとなつて表われる。 In this equivalent circuit, the resistance of the acoustic resistance material 6 is
Set R 1 to an appropriate value to obtain flat frequency characteristics. However, there is a large variation in the resistance value of the acoustic resistance material 6, and this variation directly manifests itself as a variation in characteristics.
更に組立て上、前記抵抗材６を前記絶縁体３に
安定して結合するためには、専用設備および多く
の作業時間が必要とされる。 Furthermore, in order to stably bond the resistive material 6 to the insulator 3 during assembly, special equipment and a lot of work time are required.
発明の目的
本発明は、上記従来例の問題点を除去するもの
であり、容易に周波数特性の安定化が図れ、且つ
部品数の低減および作業時間の短縮を図ることを
目的とするものである。Purpose of the Invention The present invention aims to eliminate the above-mentioned problems of the conventional example, and to easily stabilize frequency characteristics, reduce the number of parts, and shorten working time. .
発明の構成
本発明は、上記目的を達成するために、絶縁体
とプリント基板で形成される薄流体層を制動用の
音響抵抗として利用できる構成としたものであ
り、安定した抵抗値を得るとともに組立てを容易
にしたものである。Structure of the Invention In order to achieve the above-mentioned object, the present invention has a structure in which a thin fluid layer formed of an insulator and a printed circuit board can be used as an acoustic resistance for braking, thereby obtaining a stable resistance value and It is easy to assemble.
実施例の説明
以下に本発明の一実施例の構成について、図面
とともに説明する。DESCRIPTION OF EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to the drawings.
第３図において、２１は金属板、２２は圧電素
子であり、前記金属板２１に接合され、振動板を
構成している。２３は絶縁体であり、スペーサリ
ング２４とともに金属板２１をその開口端に支持
固定している。２５はケース、２６はプリント基
板であり、絶縁体２３の底部に設けられている。
２７はリード線、２８は電気信号用の端子であ
る。２９は前気室、３０は背気室、３１は絶縁体
２３の底面に設けた背面音孔、３２はプリント基
板２６に設けられた音孔３３は絶縁体２３の底面
に設けられた浅い凹陥部３４とプリント基板２６
とで形成された薄流体層である。 In FIG. 3, 21 is a metal plate, and 22 is a piezoelectric element, which are joined to the metal plate 21 and constitute a diaphragm. An insulator 23 supports and fixes the metal plate 21 together with a spacer ring 24 at its open end. 25 is a case, and 26 is a printed circuit board, which is provided at the bottom of the insulator 23.
27 is a lead wire, and 28 is a terminal for electrical signals. 29 is a front air chamber, 30 is a back air chamber, 31 is a rear sound hole provided on the bottom surface of the insulator 23, 32 is a sound hole provided on the printed circuit board 26, and a sound hole 33 is a shallow recess provided on the bottom surface of the insulator 23. part 34 and printed circuit board 26
It is a thin fluid layer formed by
次に、上記実施例の動作について説明する。第
４図は上記実施例を受話器として動作させた場合
の等価回路を示す。第４図において、r0、m0、s0
は振動板の抵抗、等価質量、ステイフネス、S1は
背気室３０のステイフネス、m1は背面音孔３１
の等価質量、r2は薄流体層３３の抵抗、m2は薄
流体層３３の等価質量、m3はプリント基板２６
の音孔３２の等価質量、Shは前気室２９のステ
イフネス、mhは前面音孔３５の等価質量、Scは
この実施例を受話器として動作させた際の測定用
カツプラのステイフネスである。Ｐは出力音圧、
Ｓは振動板面積、Ｆは供給電気信号により発生す
る駆動力である。 Next, the operation of the above embodiment will be explained. FIG. 4 shows an equivalent circuit when the above embodiment is operated as a telephone receiver. In Figure 4, r 0 , m 0 , s 0
is the resistance, equivalent mass, and stiffness of the diaphragm, S 1 is the stiffness of the back air chamber 30, and m 1 is the back sound hole 31.
, r 2 is the resistance of the thin fluid layer 33, m 2 is the equivalent mass of the thin fluid layer 33, m 3 is the printed circuit board 26
Sh is the stiffness of the front air chamber 29, mh is the equivalent mass of the front sound hole 35, and Sc is the stiffness of the measuring coupler when this embodiment is operated as a telephone receiver. P is the output sound pressure,
S is the area of the diaphragm, and F is the driving force generated by the supplied electric signal.
この等価回路において、薄流体層３３の抵抗r2
が共振制動の抵抗として作用するものである。こ
のr2は薄流体層３３の厚さ及び、長さで決定され
る値である。故にこの薄流体層３３を形成する絶
縁体２３及び、プリント基板２６の形状により、
任意に抵抗r2の値を設定できる。 In this equivalent circuit, the resistance r 2 of the thin fluid layer 33
acts as a resistance for resonance damping. This r 2 is a value determined by the thickness and length of the thin fluid layer 33. Therefore, depending on the shape of the insulator 23 forming this thin fluid layer 33 and the printed circuit board 26,
You can set the value of resistor r2 arbitrarily.
本実施例においては、制動用の抵抗の値が絶縁
体とプリント基板の形状によつて決定されるため
に、安定した抵抗値が得られるとともに、音響抵
抗材が不必要となるためローコスト化が実現でき
るという利点がある。 In this example, since the value of the braking resistance is determined by the shape of the insulator and the printed circuit board, a stable resistance value can be obtained, and since no acoustic resistance material is required, costs can be reduced. It has the advantage of being achievable.
発明の効果
本発明は絶縁体の底面に設けられた凹陥部とプ
リント基板によつて形成される薄流体層によつて
制動用の音響抵抗を得ているために、安定した抵
抗値が得られるとともに、部品点数の削減及び組
立て作業時間の短縮が図れるものである。Effects of the Invention In the present invention, a stable resistance value can be obtained because the acoustic resistance for braking is obtained by the thin fluid layer formed by the recess provided on the bottom of the insulator and the printed circuit board. At the same time, the number of parts and assembly work time can be reduced.
第１図は従来の圧電型変換器の断面図、第２図
は従来の圧電型変換器の等価回路図、第３図は本
発明の一実施例における圧電型変換器の断面図、
第４図は上記実施例における圧電型変換器の等価
回路図である。
２１……金属板、２２……圧電素子、２３……
絶縁体、２６……プリント基板、３３……薄流体
層。
FIG. 1 is a sectional view of a conventional piezoelectric transducer, FIG. 2 is an equivalent circuit diagram of a conventional piezoelectric transducer, and FIG. 3 is a sectional view of a piezoelectric transducer according to an embodiment of the present invention.
FIG. 4 is an equivalent circuit diagram of the piezoelectric transducer in the above embodiment. 21... Metal plate, 22... Piezoelectric element, 23...
Insulator, 26...Printed circuit board, 33...Thin fluid layer.
Claims (1)
板と、開口端に前記振動板を支持し、その底面に
設けた凹陥部及び背面音孔を有する絶縁体と、音
孔を有し前記絶縁体の底面に設けられた基板とか
らなり、前記凹陥部と基板とにより、流体層を形
成させた圧電型変換器。1. A diaphragm formed by bonding a piezoelectric element to a metal plate, an insulator that supports the diaphragm at an open end and has a concave portion and a rear sound hole provided on its bottom surface, and a A piezoelectric transducer comprising a substrate provided on the bottom surface of an insulator, and a fluid layer is formed by the recess and the substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15004784A JPS6129299A (en) | 1984-07-19 | 1984-07-19 | Piezoelectric transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15004784A JPS6129299A (en) | 1984-07-19 | 1984-07-19 | Piezoelectric transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6129299A JPS6129299A (en) | 1986-02-10 |
| JPH0571000B2 true JPH0571000B2 (en) | 1993-10-06 |
Family
ID=15488344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15004784A Granted JPS6129299A (en) | 1984-07-19 | 1984-07-19 | Piezoelectric transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6129299A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4222078Y1 (en) * | 1965-01-14 | 1967-12-16 |
-
1984
- 1984-07-19 JP JP15004784A patent/JPS6129299A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4222078Y1 (en) * | 1965-01-14 | 1967-12-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6129299A (en) | 1986-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |