JPH048733B2 - - Google Patents
Info
- Publication number
- JPH048733B2 JPH048733B2 JP56150342A JP15034281A JPH048733B2 JP H048733 B2 JPH048733 B2 JP H048733B2 JP 56150342 A JP56150342 A JP 56150342A JP 15034281 A JP15034281 A JP 15034281A JP H048733 B2 JPH048733 B2 JP H048733B2
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric vibrator
- pin
- fixed
- base
- plate
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
本発明は自動車エンジン等に取付け、そのノツ
キング状態を検出するノツキングセンサに関する
もので、その信頼性および量産性の向上をはかる
ことを目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a knocking sensor that is attached to an automobile engine or the like to detect a knocking state thereof, and an object of the present invention is to improve the reliability and mass productivity of the knocking sensor.
従来この種の装置はエンジンへの取付部を有す
るケースを除くと第１図イのような構成のものか
らなり、そのセンサ部分のみを示せば同図ロのよ
うになる。 A conventional device of this type has a structure as shown in FIG. 1A, except for a case having a mounting portion for the engine, and as shown in FIG. 1B, if only the sensor portion is shown.
すなわちコネクタ部４上の金属基台３にセラミ
ツク基板６、圧電振動子２の順で設け、同振動子
２を押え板１に取付けられるネジ５によつて金属
基台３に固定している。 That is, a ceramic substrate 6 and a piezoelectric vibrator 2 are provided in this order on a metal base 3 on a connector section 4, and the vibrator 2 is fixed to the metal base 3 by screws 5 attached to the holding plate 1.
またハンダ１３によつてセラミツク基板６の表
面の導電層にリード線７を取付け、同リード線７
はハンダ１４によつてピン１２に結合し、圧電振
動子２の振動出力をコネクタ外部に導かれるよう
にしている。 Further, a lead wire 7 is attached to the conductive layer on the surface of the ceramic substrate 6 with solder 13, and the lead wire 7 is attached to the conductive layer on the surface of the ceramic substrate 6.
is connected to the pin 12 by solder 14 so that the vibration output of the piezoelectric vibrator 2 is guided to the outside of the connector.
上述したようにピン１２とセラミツク基板６と
の結合はハンダを使うのが必須の要件であるた
め、作業性を改善するにも限度がある一方、−40°
〜＋130℃の使用環境に際し、そのハンダ部分に
ハンダラツクが生じて故障の原因となることがあ
る。また上記従来例では、ノツキングセンサの振
動によつてリード線７が振動すると、このリード
線７の両端のハンダ付け部で切断し易い問題があ
つた。 As mentioned above, since it is essential to use solder to connect the pins 12 and the ceramic substrate 6, there is a limit to how much workability can be improved.
When used in an environment of ~+130°C, solder defects may occur in the solder portion, causing failure. Further, in the conventional example described above, when the lead wire 7 vibrates due to the vibration of the knocking sensor, there is a problem in that the lead wire 7 is easily broken at the soldered portions at both ends.
本発明はこのような欠点を除去したもので、以
下第２図および第３図に示した一実施例により説
明する。同図において１〜６および１２は第１図
において同符号で示したものと同じものからな
る。８，９は振動子押え用金属板、１５はゴムリ
ング、１６はエンジンへの取付部１７を有するケ
ース、１８は一端を金属板８への溶接固定片２０
とし、他端にピン１２へはめ込まれる筒状のはめ
込み部１９を有するリード端子ではめ込み部１９
をピン１２へはめ込んだ際はハンダ２１により固
定される。なおセラミツク基板６は金属基台３と
金属板８との間を絶縁するもので、しかも金属板
８にリード端子１８を結合するために表面に導電
層を設ける必要がない。 The present invention eliminates these drawbacks and will be described below with reference to an embodiment shown in FIGS. 2 and 3. In the figure, 1 to 6 and 12 are the same as those indicated by the same symbols in FIG. 8 and 9 are metal plates for holding down the vibrator, 15 is a rubber ring, 16 is a case having a mounting part 17 to the engine, and 18 is a fixing piece 20 whose one end is welded to the metal plate 8.
A lead terminal with a cylindrical fitting part 19 fitted into the pin 12 at the other end.
When inserted into the pin 12, it is fixed with solder 21. The ceramic substrate 6 provides insulation between the metal base 3 and the metal plate 8, and there is no need to provide a conductive layer on the surface to connect the lead terminals 18 to the metal plate 8.
また金属板８，９は圧電振動子２にハンダある
いは接着剤等によりあらかじめ固定しておくこと
により素子長は金属板８，９から突き出した部分
となり、かつ振動によりその振動する長さが変化
してしまうということがない。 Furthermore, by fixing the metal plates 8 and 9 to the piezoelectric vibrator 2 in advance with solder or adhesive, the length of the element becomes a portion that protrudes from the metal plates 8 and 9, and the vibrating length changes due to vibration. There is no such thing as a problem.
さらにリード端子１８は金属板８にあらかじめ
固定しておいてもよい。 Further, the lead terminal 18 may be fixed to the metal plate 8 in advance.
本発明は上記のような構造であり、一端部に溶
接固定片が設けられ他端部に筒状のはめ込み部が
設けられたリード端子を使用し、溶接固定片を圧
電振動子押え用の金属板に溶接し、筒状のはめ込
み部をピンに挿入してハンダ付けするため、金属
板とピンとの接続作業が容易になるとともに、特
に筒状のはめ込み部をピンにはめ込んでハンダ付
けするため、リード端子とピンとの接続が確実に
なり、さらに温度変化によるハンダラツクの発生
を防止できるものである。 The present invention has the above-mentioned structure, and uses a lead terminal in which a welding fixation piece is provided at one end and a cylindrical fitting part at the other end, and the welding fixation piece is attached to a metal for holding a piezoelectric vibrator. Since it is welded to the plate and the cylindrical fitting part is inserted into the pin and soldered, it is easy to connect the metal plate and the pin, and especially since the cylindrical fitting part is fitted into the pin and soldered, The connection between the lead terminal and the pin is ensured, and furthermore, the occurrence of solder damage due to temperature changes can be prevented.
また、従来例のように、セラミツク基板、圧電
振動子、押え板を重ねてネジで固定する場合に
は、セラミツク基板、押え板と圧電振動子との接
触端部から、圧電振動子の自由端までの長さが一
定にならず、この長さに依存するノツキングセン
サの周波数特性が安定しないのに対し、本発明で
は、圧電振動子の一端部の両面にあらかじめ金属
板をハンダ、接着剤等で固定しているため、圧電
振動子の振動部の長さ、すなわち金属板と圧電振
動子との接触端部から圧電振動子の自由端までの
長さが一定となり、この長さに依存するノツキン
グセンサの周波数特性が安定する利点を有する。
また、本発明によれば、押え板による圧電振動子
の押圧方向と、はめ込み部のピンへのはめ込み方
向とを同一方向としているため、圧電振動子と金
属板との一体物の基台への組み込み、及びはめ込
み部のピンへの挿入、及び一体物の位置決めが同
時に行え、ノツキングセンサの生産性が向上する
利点を有するものである。 In addition, when the ceramic substrate, piezoelectric vibrator, and holding plate are stacked and fixed with screws as in the conventional example, the free end of the piezoelectric vibrator is In contrast, in the present invention, a metal plate is attached in advance to both sides of one end of the piezoelectric vibrator by soldering or adhesive. etc., the length of the vibrating part of the piezoelectric vibrator, that is, the length from the contact end of the metal plate and the piezoelectric vibrator to the free end of the piezoelectric vibrator, is constant and depends on this length. This has the advantage that the frequency characteristics of the knocking sensor are stable.
Further, according to the present invention, since the direction in which the piezoelectric vibrator is pressed by the holding plate and the direction in which the fitting portion is fitted into the pin are the same direction, the piezoelectric vibrator and the metal plate are attached to the base of the integrated body. This has the advantage that the assembly, insertion of the fitting portion into the pin, and positioning of the integrated object can be performed at the same time, improving the productivity of the knotting sensor.
第１図イは従来のノツキングセンサの要部斜視
図、同図ロはそのセンサ部の側面図、第２図は本
発明の一実施例におけるノツキングセンサの分解
斜視図、第３図は同要部斜視図である。
２……圧電振動子、６……セラミツク基板、
８，９……金属板、１８……リード端子。
FIG. 1A is a perspective view of the main parts of a conventional knocking sensor, FIG. 1B is a side view of the sensor section, FIG. It is a perspective view of the same main part. 2...Piezoelectric vibrator, 6...Ceramic substrate,
8, 9...metal plate, 18...lead terminal.
Claims (1)
れた一対の金属板と、上記金属板が固定された上
記圧電振動子を基台に押圧固定する押え板と、上
記押え板を上記基台に取付けるネジと、一端がコ
ネクタ部に接続され他端が上記基台より突出した
ピンと、一端部が上記金属板の一方に固定され他
端部に上記ピンが挿入及び固定される筒状のはめ
込み部を有するリード端子とを具備し、上記押え
板による上記圧電振動子の押圧方向と上記はめ込
み部の上記ピンへのはめ込み方向とを同一方向と
したノツキングセンサ。1. A pair of metal plates fixed in advance to both sides of one end of the piezoelectric vibrator, a presser plate that presses and fixes the piezoelectric vibrator to which the metal plate is fixed to a base, and the presser plate is attached to the base. A screw, a pin with one end connected to the connector part and the other end protruding from the base, and a cylindrical fitting part with one end fixed to one of the metal plates and the other end into which the pin is inserted and fixed. a lead terminal having a lead terminal, the direction in which the piezoelectric vibrator is pressed by the holding plate and the direction in which the fitting portion is fitted into the pin are the same direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56150342A JPS5850436A (en) | 1981-09-21 | 1981-09-21 | Knocking sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56150342A JPS5850436A (en) | 1981-09-21 | 1981-09-21 | Knocking sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5850436A JPS5850436A (en) | 1983-03-24 |
| JPH048733B2 true JPH048733B2 (en) | 1992-02-18 |
Family
ID=15494895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56150342A Granted JPS5850436A (en) | 1981-09-21 | 1981-09-21 | Knocking sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5850436A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5821127A (en) * | 1981-07-29 | 1983-02-07 | Matsushita Electric Ind Co Ltd | Detector for oscillation |
-
1981
- 1981-09-21 JP JP56150342A patent/JPS5850436A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5850436A (en) | 1983-03-24 |
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