JPH04118635U - vibration detector - Google Patents
vibration detectorInfo
- Publication number
- JPH04118635U JPH04118635U JP2115791U JP2115791U JPH04118635U JP H04118635 U JPH04118635 U JP H04118635U JP 2115791 U JP2115791 U JP 2115791U JP 2115791 U JP2115791 U JP 2115791U JP H04118635 U JPH04118635 U JP H04118635U
- Authority
- JP
- Japan
- Prior art keywords
- base case
- vibration detector
- diaphragm
- vibration
- circumferential surface
- 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.)
- Granted
Links
- 230000005284 excitation Effects 0.000 abstract description 11
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
(57)【要約】
【目的】この発明は、所定の加振周波数を有する振動検
出器をバラツキなく製造できるとともに、長期にわたっ
てその加振周波数は安定化する。
【構成】カシメ部1cの折れ部10dの先端部とベース
ケース1の内周面1fとを軸線方向において一致させ
る。
(57) [Summary] [Objective] The present invention allows a vibration detector having a predetermined excitation frequency to be manufactured without variation, and the excitation frequency is stabilized over a long period of time. [Structure] The tip of the bent portion 10d of the caulked portion 1c and the inner circumferential surface 1f of the base case 1 are aligned in the axial direction.
Description
【0001】0001
この考案は、ベースケースにベースケースの周辺部をカシメたカシメ部により 組み付けられたカバーを有する振動検出器に関するものである。 This idea uses a caulking part that caulks the periphery of the base case to the base case. The present invention relates to a vibration detector with an assembled cover.
【0002】0002
図2は従来の振動検出器の一例を示す半断面図であり、図において、1は平面 形状が正六角形のベースケースで、内燃機関(図示せず)に取り付けるためにね じ部1a、底面1bを有している。2は金属製の振動板、3は振動板2と同心で 振動板2に接着され振動を電気信号に変換する圧電素子、4は圧電素子3に一端 部が接続されたリード線、5は圧電素子3を閉じ込めるための樹脂製カバー、6 はカバー5の成形時にカバー5と一体成形され、また先端部がリード線4に接続 された端子である。 1cはベースケース1のカシメ部、1dはカシメ部1cの折れ部、5aはカバ ー5の外周部に形成されたつば部、7はつば部5aと振動板2の外周部2aとの 間で挟持されたワッシャである FIG. 2 is a half-sectional view showing an example of a conventional vibration detector, and in the figure, 1 is a plane. A base case with a regular hexagonal shape, designed for installation in an internal combustion engine (not shown). It has a bottom surface 1b and a bottom surface 1b. 2 is a metal diaphragm, 3 is concentric with diaphragm 2 A piezoelectric element that is bonded to the diaphragm 2 and converts vibration into an electrical signal, 4 has one end attached to the piezoelectric element 3 5 is a resin cover for enclosing the piezoelectric element 3; 6 is a lead wire connected to the piezoelectric element 3; is integrally molded with the cover 5 when the cover 5 is molded, and its tip is connected to the lead wire 4. It is a terminal that has been connected. 1c is the caulked part of the base case 1, 1d is the bent part of the caulked part 1c, and 5a is the cover. - A collar formed on the outer periphery of the diaphragm 2; is a washer sandwiched between
【0003】 従来の振動検出器は上記のように構成され、ベースケース1のねじ部1aによ り、内燃機関に底面1bが接して固定される。内燃機関の運転状態に応じて生じ る振動は、底面1bから振動板2および圧電素子3に振動が伝わり、圧電素子3 は振動により応力を受けると、これに比例した検出信号を発生し、振動板2側の 電極を基準にリード線4を介して端子6に出力する。0003 The conventional vibration detector is configured as described above, and is connected to the screw portion 1a of the base case 1. The bottom surface 1b is fixed in contact with the internal combustion engine. Occurs depending on the operating condition of the internal combustion engine. The vibration is transmitted from the bottom surface 1b to the diaphragm 2 and the piezoelectric element 3, and When subjected to stress due to vibration, it generates a detection signal proportional to this, and the vibration plate 2 side It is output to the terminal 6 via the lead wire 4 based on the electrode.
【0004】0004
上記のように構成された振動検出器においては、カシメ部1cの折れ部1dは カバー5を押さえるために形成されているが、特にカバー5のつば部5aの厚み が小さいときには、高温度下においてカバー5の枯れにより加振周波数が図3中 のIの初期特性から、最終的にはIIIの加振周波数に低下してしまうという課題が あった。このことは、振動板2がベースケース1側に振れるときには、ベースケ ース1の受け面1eの内径で振動板2の固定端を定めることができるものの、折 れ部1dの先端部はベースケース1の内周面1fよりも外側にあるので、つば部 5aを介して振動板2の外周部2aを押圧するカシメ部1cの力は弱く振動板2 の実際の振動面が拡がるためである。 この考案は、かかる課題を解決するためになされたもので、所定の加振周波数 をバラツキなく得ることができるとともに、長期にわたって所定の加振周波数を 得ることができる振動検出器を提供することを目的とする。 In the vibration detector configured as described above, the bent portion 1d of the caulked portion 1c is Although it is formed to hold down the cover 5, the thickness of the brim portion 5a of the cover 5 is particularly When is small, the excitation frequency decreases as shown in Fig. 3 due to withering of the cover 5 under high temperature. The problem is that the initial characteristics of I eventually drop to the excitation frequency of III. there were. This means that when the diaphragm 2 swings toward the base case 1, the base case Although the fixed end of the diaphragm 2 can be determined by the inner diameter of the receiving surface 1e of the base 1, Since the tip of the bent portion 1d is located outside the inner circumferential surface 1f of the base case 1, the flange portion The force of the caulking portion 1c that presses the outer peripheral portion 2a of the diaphragm 2 through the diaphragm 5a is weak and the diaphragm 2 This is because the actual vibration surface of This idea was made to solve this problem, and it is possible to can be obtained without variation, and at the same time, it is possible to maintain a predetermined excitation frequency over a long period of time. The purpose is to provide a vibration detector that can be obtained.
【0005】[0005]
この考案に係る振動検出器は、カシメ部の折れ部の先端部がベースケースの内 周面と軸線方向に一致させたものである。 In the vibration detector according to this invention, the tip of the bent part of the caulking part is inside the base case. The circumferential surface and the axial direction are aligned.
【0006】[0006]
この考案においては、カシメ部の折れ部の先端部がベースケースの内周面と軸 線方向に一致させたことにより、所定の加振周波数をバラツキなく得ることがで きるとともに、長期にわたって所定の加振周波数を得ることができる。 In this design, the tip of the bent part of the caulking part is connected to the inner peripheral surface of the base case and the shaft. By matching in the linear direction, it is possible to obtain the specified excitation frequency without variation. At the same time, it is possible to obtain a predetermined excitation frequency over a long period of time.
【0007】[0007]
以下、この考案の一実施例を図について説明する。図1はこの考案の一実施例 を示す半断面図であり、折れ部10dの先端部をベースケース1の内周面1fと 軸線方向において一致させた点が図2に示した従来のものと異なるところであり 、その他の構成は同様である。 An embodiment of this invention will be described below with reference to the drawings. Figure 1 shows an example of this idea. 2 is a half-sectional view showing the tip of the bent portion 10d and the inner circumferential surface 1f of the base case 1. The difference from the conventional model shown in Fig. 2 is that they are aligned in the axial direction. , the other configurations are the same.
【0008】 上記のように構成された振動検出器においては、折れ部10dの先端部がワッ シャ7およびベースケース1の内周面1fと軸線方向と一致しているので、振動 板2がカバー5の方向に振動したときでも、ワッシャ7の内径部を固定端として 振動板2は振動し、またカバー5に枯れが生じても、振動板2の振動面の拡がり を小さく抑えることができ、加振周波数が図3中のIの初期特性から、最終的に はIIの加振周波数に低下するが、その量は従来のものと比較したときに軽減され る。[0008] In the vibration detector configured as described above, the tip of the bent portion 10d is Since the inner circumferential surface 1f of the housing 7 and the base case 1 coincide with the axial direction, vibration Even when the plate 2 vibrates in the direction of the cover 5, the inner diameter part of the washer 7 can be used as a fixed end. The diaphragm 2 vibrates, and even if the cover 5 dies, the vibration surface of the diaphragm 2 will not spread. can be kept small, and the excitation frequency will eventually change from the initial characteristic of I in Figure 3 to is lowered to the excitation frequency of II, but the amount is reduced when compared to the conventional one. Ru.
【0009】[0009]
以上説明したように、この考案の振動検出装置によれば、カシメ部の折れ部の 先端部がベースケースの内周面と軸線方向に一致させたことにより、所定の加振 周波数をバラツキなく得ることができるとともに、長期にわたって所定の加振周 波数を得ることができるという効果がある。 As explained above, according to the vibration detection device of this invention, the bending part of the caulking part can be detected. By aligning the tip with the inner peripheral surface of the base case in the axial direction, the specified vibration can be applied. The frequency can be obtained without any variation, and the predetermined excitation frequency can be maintained over a long period of time. This has the effect of being able to obtain wave numbers.
【図1】この考案の一実施例を示す半断面図である。FIG. 1 is a half-sectional view showing an embodiment of this invention.
【図2】従来も振動検出器の一例を示す半断面図であ
る。FIG. 2 is a half-sectional view showing an example of a conventional vibration detector.
【図3】振動検出器の加振周波数と出力電圧との関係を
示す図である。FIG. 3 is a diagram showing the relationship between the excitation frequency and output voltage of the vibration detector.
1 ベースケース 1c カシメ部 1e 受け面 1f 内周面 2 振動板 3 圧電素子 5 カバー 10d 折れ部 1 Base case 1c Caulking part 1e Receiving surface 1f Inner peripheral surface 2 Vibration plate 3 Piezoelectric element 5 Cover 10d Bent part
Claims (1)
周面に連設された受け面に載置されて前記ベースケース
内に収納された振動板と、この振動板に接着され振動応
力を電気信号に変換する圧電素子と、前記ベースケース
にベースケースの周辺部をカシメたカシメ部により組み
付けられ前記圧電素子を保護するカバーとを備えた振動
検出器において、前記カシメ部の折れ部の先端部が前記
内周面と軸線方向に一致させたことを特徴とする振動検
出器。1. A base case having an inner circumferential surface, a diaphragm mounted on a receiving surface connected to the inner circumferential surface and housed in the base case, and a diaphragm bonded to the diaphragm and configured to absorb vibration stress. In the vibration detector, the vibration detector includes a piezoelectric element that converts a signal into an electric signal, and a cover that is assembled to the base case by a caulking part that is caulked around the periphery of the base case and protects the piezoelectric element. A vibration detector characterized in that a tip portion is aligned with the inner circumferential surface in an axial direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2115791U JP2534829Y2 (en) | 1991-04-03 | 1991-04-03 | Vibration detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2115791U JP2534829Y2 (en) | 1991-04-03 | 1991-04-03 | Vibration detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04118635U true JPH04118635U (en) | 1992-10-23 |
JP2534829Y2 JP2534829Y2 (en) | 1997-05-07 |
Family
ID=31907016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2115791U Expired - Lifetime JP2534829Y2 (en) | 1991-04-03 | 1991-04-03 | Vibration detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2534829Y2 (en) |
-
1991
- 1991-04-03 JP JP2115791U patent/JP2534829Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2534829Y2 (en) | 1997-05-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |