JPH0697185B2 - Vibration detector - Google Patents
Vibration detectorInfo
- Publication number
- JPH0697185B2 JPH0697185B2 JP63152422A JP15242288A JPH0697185B2 JP H0697185 B2 JPH0697185 B2 JP H0697185B2 JP 63152422 A JP63152422 A JP 63152422A JP 15242288 A JP15242288 A JP 15242288A JP H0697185 B2 JPH0697185 B2 JP H0697185B2
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- piezoelectric element
- screw
- vibration detector
- outer peripheral
- 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
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、振動検出器に関し、さらに詳しくいうと、
圧電素子および重錘をネジによりベースに固定してなる
振動検出器に関するものである。TECHNICAL FIELD The present invention relates to a vibration detector, and more specifically,
The present invention relates to a vibration detector in which a piezoelectric element and a weight are fixed to a base with screws.
第６図、第７図は実公昭60−23730号公報に記載された
従来の振動検出器であり、下面に取付ネジ（1a）が突設
されたベース（１）には、その上部に収納部（1b）が形
成されており、取付ネジ（1a）により被測定物に固定さ
れる。収納部（1b）には、中間にターミナル（３）を挾
持した１対の圧電素子（２）および重錘（６）が円筒状
に重ねられ、ネジ（７）によりベース（１）に固着され
ている。ターミナル（３）は厚さ0.1〜0.2mmのリン青銅
板でなり、ネジ貫通穴（3a）、リードワイヤ（４）の接
続片（3b）が形成されている。圧電素子（２）およびタ
ーミナル（３）とネジ（７）とを絶縁するため、厚さ0.
2〜0.3mmのポリエチレンチユーブでなる絶縁チユーブ
（５）が、ネジ（７）に取付けられている。収納部（1
b）内の空隙には半固体樹脂（８）が充填されており、
リードワイヤ（４）は半固体樹脂（８）内をネジ（７）
と平行に通つて外部へ導出されている。6 and 7 show a conventional vibration detector described in Japanese Utility Model Publication No. 60-23730, which is housed in the upper portion of a base (1) having a mounting screw (1a) protruding from the lower surface thereof. The part (1b) is formed and is fixed to the object to be measured by the mounting screw (1a). A pair of piezoelectric elements (2) holding a terminal (3) in the middle and a weight (6) are stacked in a cylindrical shape in the storage section (1b) and fixed to the base (1) by a screw (7). ing. The terminal (3) is made of a phosphor bronze plate having a thickness of 0.1 to 0.2 mm, and has a screw through hole (3a) and a connecting piece (3b) of a lead wire (4). Since the piezoelectric element (2) and the terminal (3) are insulated from the screw (7), a thickness of 0.
An insulating tube (5) consisting of a polyethylene tube of 2 to 0.3 mm is attached to the screw (7). Storage (1
The void in b) is filled with semi-solid resin (8),
The lead wire (4) is screwed (7) in the semi-solid resin (8).
It is led to the outside through the parallel with.
以上の構成により、ベース（１）の取付けネジ（1a）を
被測定物に締付け、ベース（１）を被測定物と同じモー
ドで振動させる。重錘（６）、圧電素子（２）、ターミ
ナル（３）および絶縁チユーブ（５）をウエイトとした
バネ系の共振周波数以下の振動数では、加速度に比例し
た力が圧電素子（２）が加わり、圧電素子（２）の＋極
であるターミナル（３）に、歪に比例した電圧が発生す
る。With the above configuration, the mounting screw (1a) of the base (1) is tightened on the object to be measured, and the base (1) is vibrated in the same mode as the object to be measured. At frequencies below the resonance frequency of the spring system with the weight (6), the piezoelectric element (2), the terminal (3) and the insulating tube (5) as the weight, a force proportional to the acceleration causes the piezoelectric element (2) to be applied. A voltage proportional to the strain is generated at the terminal (3) which is the + pole of the piezoelectric element (2).
ここで、以上の構成になる振動検出器の組立てに際し
て、ターミナル（３）にネジ（７）の中心軸と直交する
方向の外力が加わると、ターミナル（３）により絶縁チ
ユーブ（５）の破断が発生し、ターミナル（３）はネジ
（７）と短絡する。そうすると、圧電素子（２）で検出
の信号は出力されないことになる。たとえば、リードワ
イヤ（４）に引張りが生じると、ターミナル（３）はリ
ードワイヤ（４）との接続片（3b）の方向に引張られ、
ターミナル（３）は接続片（3b）のない側で絶縁チユー
ブ（５）にくい込み、ネジ（７）と短絡する。Here, when an external force in a direction orthogonal to the central axis of the screw (7) is applied to the terminal (3) when assembling the vibration detector having the above configuration, the terminal (3) causes the insulating tube (5) to break. Occurs, the terminal (3) is short-circuited with the screw (7). Then, the detection signal is not output from the piezoelectric element (2). For example, when the lead wire (4) is pulled, the terminal (3) is pulled in the direction of the connecting piece (3b) with the lead wire (4),
The terminal (3) is pushed into the insulation tube (5) on the side without the connection piece (3b) and short-circuited with the screw (7).
以上のような従来の振動検出器は、組立てに際してター
ミナルが変位して絶縁チユーブを破断し、ターミナルと
ネジが短絡するおそれがあつた。In the conventional vibration detector as described above, the terminal may be displaced at the time of assembly, the insulating tube may be broken, and the terminal and the screw may be short-circuited.
この発明は上記の課題を解決するためになされたもの
で、組立て時に発生するターミナルによる絶縁チユーブ
の破断を防止することができる振動検出器を得ることを
目的とする。The present invention has been made to solve the above problems, and an object thereof is to obtain a vibration detector capable of preventing breakage of an insulating tube due to a terminal that occurs during assembly.
この発明に係る振動検出器は、ターミナルの外周部に、
圧電素子の外周部に当接する少なくとも１個の折曲片が
形成されている。The vibration detector according to the present invention, on the outer peripheral portion of the terminal,
At least one bent piece that abuts the outer peripheral portion of the piezoelectric element is formed.
この発明においては、組立てに際して、ターミナルにネ
ジと直交する方向の力が作用しても、折曲片と圧電素子
外周部との係合によりターミナルの変位が阻止される。According to the present invention, the displacement of the terminal is prevented by the engagement between the bent piece and the outer peripheral portion of the piezoelectric element even when a force in the direction orthogonal to the screw acts on the terminal during assembly.
第１図，第２図はこの発明の一実施例を示し、圧電素子
（２）に設けられるターミナル（13）は、ネジ貫通穴
（13a）、リードワイヤ（４）を接続するための接続片
（13b）に加え、接続片（13b）に対向する外周部に直角
に折曲した折曲片（13c）が形成されている。折曲片（1
3c）は上側の圧電素子（２）の外周部に当接して組込ま
れている。1 and 2 show an embodiment of the present invention, in which the terminal (13) provided on the piezoelectric element (2) is a connecting piece for connecting the screw through hole (13a) and the lead wire (4). In addition to (13b), a bent piece (13c) bent at a right angle is formed on the outer peripheral portion facing the connection piece (13b). Bent piece (1
3c) is assembled in contact with the outer peripheral portion of the upper piezoelectric element (2).
その他、第６図と同一の符号は同一部分を示している。In addition, the same reference numerals as those in FIG. 6 indicate the same parts.
以上の構成により、組立てに際してリードワイヤ（４）
が矢印（Ａ）方向に引張られても、ターミナル（13）は
折曲片（13c）により圧電素子（２）の外周部に係止さ
れているので変位することなく、ターミナル（13）によ
る絶縁チユーブ（５）の破断は生じない。第３図はター
ミナル（13）の変形を示し、折曲片（13c）に加え、こ
れと略90゜離れた円周位置にそれぞれ折曲片（13d），
（13e）を形成してなるものである。With the above-mentioned configuration, the lead wire (4) is used for assembling.
Even if is pulled in the direction of the arrow (A), the terminal (13) is locked to the outer peripheral portion of the piezoelectric element (2) by the bent piece (13c), so that the terminal (13) is not displaced and is insulated by the terminal (13). No fracture of the tube (5) occurs. Fig. 3 shows the deformation of the terminal (13). In addition to the bent piece (13c), the bent pieces (13d),
(13e) is formed.
かかる構成により、ターミナル（13）の変位を、一層確
実に防止することができる。With this configuration, the displacement of the terminal (13) can be prevented more reliably.
第４図は他の実施例を示し、第２図または第３図のよう
なターミナル（13）を、その折曲片（13c）等が下側の
圧電素子（２）の外周部に係合するように組込んでなる
ものである。FIG. 4 shows another embodiment, in which the bent piece (13c) of the terminal (13) as shown in FIG. 2 or 3 is engaged with the outer peripheral portion of the lower piezoelectric element (2). It is built in as described below.
その他、第１図と同一符号は同一部分である。In addition, the same reference numerals as those in FIG. 1 are the same parts.
以上の構成により、組立てに際してリードワイヤ（４）
に矢印（Ａ）方向の引張り力がかかると、第５図に示す
ように、折曲片（13c）が矢印（Ｂ）方向へ変位して下
側の圧電素子（２）の外周部に、より確実に係合する。
かようにして、絶縁チユーブ（５）の破断が一層確実に
防止される。With the above-mentioned configuration, the lead wire (4) is used for assembling.
When a pulling force in the direction of the arrow (A) is applied to, the bending piece (13c) is displaced in the direction of the arrow (B) and the outer peripheral portion of the lower piezoelectric element (2), as shown in FIG. Engage more securely.
In this way, breakage of the insulating tube (5) is more reliably prevented.
この発明は、以上の説明から明らかなように、ターミナ
ルの外周部に圧電素子の外周部に当接する折曲片を設け
たことにより、圧電素子に対するターミナルの位置を一
定に保持し、外力によるターミナルの変位を防ぎ、ター
ミナルのネジへの短絡を防止して組立てを容易にする効
果がある。As is clear from the above description, the present invention provides the terminal with respect to the piezoelectric element at a constant position by providing the bent piece that is in contact with the outer peripheral portion of the piezoelectric element on the outer peripheral portion of the terminal, and the terminal by the external force is applied. It is effective in preventing the displacement of the terminal and preventing the short circuit to the screw of the terminal and facilitating the assembling.
第１図はこの発明の一実施例の縦断面図、第２図は第１
図におけるターミナルの（ａ）平面図および（ｂ）側面
図、第３図は同じくターミナルの変形の（ａ）平面図お
よび（ｂ）側面図、第４図は他の実施例の縦断面図、第
５図は第４図のものの作用説明のための一部縦断面図、
第６図は従来の振動検出器の縦断面図、第７図は第６図
におけるターミナルの（ａ）平面図および（ｂ）側面図
である。 （１）……ベース、（２）……圧電素子、（４）……リ
ードワイヤ、（５）……絶縁チユーブ、（６）……重
錘、（７）……ネジ、（13）……ターミナル、（13b）
……接続片、（13c），（13d），（13e）……折曲片。 なお、各図中、同一符号は同一又は相当部分を示す。FIG. 1 is a vertical sectional view of an embodiment of the present invention, and FIG.
(A) Plan view and (b) side view of the terminal in the figure, FIG. 3 is a (a) plan view and (b) side view of the modification of the terminal, and FIG. 4 is a longitudinal sectional view of another embodiment. FIG. 5 is a partial vertical sectional view for explaining the operation of the one shown in FIG.
FIG. 6 is a longitudinal sectional view of a conventional vibration detector, FIG. 7 is a plan view (a) and a side view (b) of the terminal in FIG. (1) ... Base, (2) ... Piezoelectric element, (4) ... Lead wire, (5) ... Insulation tube, (6) ... Weight, (7) ... Screw, (13) ... … Terminal, (13b)
...... Connecting piece, (13c), (13d), (13e) …… Bending piece. In each figure, the same reference numerals indicate the same or corresponding parts.
Claims (1)
にリードワイヤへの接続片および前記圧電素子の外周部
に当接する少なくとも１個の折曲片が形成されたターミ
ナルと、絶縁チューブが装着され前記圧電素子と前記タ
ーミナルおよび重錘をベースに締付け固定するネジとを
備えてなる振動検出器。1. A terminal which is sandwiched between a pair of annular piezoelectric elements and which has a connecting piece to a lead wire formed on the outer peripheral portion thereof and at least one bent piece which abuts on the outer peripheral portion of the piezoelectric element, and an insulating member. A vibration detector, which is provided with a tube, and which comprises the piezoelectric element, and a screw for tightening and fixing the terminal and the weight to a base.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63152422A JPH0697185B2 (en) | 1988-06-22 | 1988-06-22 | Vibration detector |
| DE3918780A DE3918780C2 (en) | 1988-06-10 | 1989-06-08 | Accelerometer |
| KR1019890007910A KR920009019B1 (en) | 1988-06-10 | 1989-06-09 | Vibration detector |
| US07/364,043 US4959993A (en) | 1988-06-10 | 1989-06-09 | Acceleration detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63152422A JPH0697185B2 (en) | 1988-06-22 | 1988-06-22 | Vibration detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01320436A JPH01320436A (en) | 1989-12-26 |
| JPH0697185B2 true JPH0697185B2 (en) | 1994-11-30 |
Family
ID=15540169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63152422A Expired - Lifetime JPH0697185B2 (en) | 1988-06-10 | 1988-06-22 | Vibration detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0697185B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100440732B1 (en) * | 2002-11-05 | 2004-07-19 | 국방과학연구소 | Screw insulating apparatus and sensor assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61123942U (en) * | 1985-01-23 | 1986-08-04 |
-
1988
- 1988-06-22 JP JP63152422A patent/JPH0697185B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01320436A (en) | 1989-12-26 |
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