JPH0532783Y2 - - Google Patents
Info
- Publication number
- JPH0532783Y2 JPH0532783Y2 JP6697587U JP6697587U JPH0532783Y2 JP H0532783 Y2 JPH0532783 Y2 JP H0532783Y2 JP 6697587 U JP6697587 U JP 6697587U JP 6697587 U JP6697587 U JP 6697587U JP H0532783 Y2 JPH0532783 Y2 JP H0532783Y2
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- holding rubber
- air layer
- holder
- protrusions
- 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
- 238000002604 ultrasonography Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Transducers For Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
【考案の詳細な説明】
〔考案の分野〕
本考案は超音波スイツチに用いられる超音波振
動子に関するものである。[Detailed Description of the Invention] [Field of the Invention] The present invention relates to an ultrasonic transducer used in an ultrasonic switch.
（従来技術）
従来反射型の超音波スイツチは断続的に超音波
素子を駆動し、その間超音波素子を受信用素子と
して使い物体からの反射波の有無を検出するよう
にしている。そして超音波は有限の速度を有する
ため検知範囲は受波時間によつて決定される。従
つて超音波スイツチの近傍の物体を検出するため
には送波を終えると直ちに受波状態に入ることが
好ましい。しかしながら超音波スイツチは駆動後
も振動が徐々に低下する、いわゆる残響が存在す
るため、残留時間をできるだけ短くする必要があ
る。第３図は従来の超音波素子とそれを保持する
素子ホルダの構造を示す図である。本図に示すよ
うに円柱形の超音波素子１は前面が超音波を発振
する振動面として構成されており、残響を短くす
るために円筒状の保持ゴム２によつて覆われ、ホ
ルダ３内に保持される。そして超音波素子１の裏
面はフツク４によつて保持されるように構成され
ている。
(Prior Art) A conventional reflection-type ultrasonic switch drives an ultrasonic element intermittently, and during that time the ultrasonic element is used as a receiving element to detect the presence or absence of reflected waves from an object. Since ultrasonic waves have a finite speed, the detection range is determined by the reception time. Therefore, in order to detect objects near the ultrasonic switch, it is preferable to enter the wave receiving state immediately after transmitting waves. However, since the ultrasonic switch has so-called reverberation, in which the vibration gradually decreases even after activation, it is necessary to shorten the residual time as much as possible. FIG. 3 is a diagram showing the structure of a conventional ultrasonic element and an element holder that holds it. As shown in this figure, the front surface of the cylindrical ultrasonic element 1 is configured as a vibration surface that oscillates ultrasonic waves, and is covered with a cylindrical holding rubber 2 to shorten reverberation. is maintained. The back surface of the ultrasonic element 1 is configured to be held by a hook 4.
（考案が解決しようとする問題点）
しかしながらこのような従来の超音波スイツチ
では、超音波素子１の全ての面に保持ゴム２が設
けられその外周の前面が超音波ホルダ３の内面に
面接触しているため、超音波素子１と保持ゴム２
との間で超音波が反射を繰り返し残響が容易に減
衰しないという問題点があつた。(Problem to be solved by the invention) However, in such a conventional ultrasonic switch, the holding rubber 2 is provided on all surfaces of the ultrasonic element 1, and the front surface of the outer periphery is in surface contact with the inner surface of the ultrasonic holder 3. Therefore, ultrasonic element 1 and holding rubber 2
There was a problem in that the ultrasonic waves were repeatedly reflected between the two, and the reverberations were not easily attenuated.
本考案はこのような従来の超音波素子の問題点
に鑑みてなされたものであつて、残響が容易に減
衰するような構造となるようにすることを技術的
課題とする。
The present invention has been developed in view of the problems of conventional ultrasonic elements, and its technical objective is to provide a structure in which reverberation can be easily attenuated.
（問題点を解決するための手段）
本考案は素子ホルダ内に保持ゴムを介して超音
波素子を取付けて構成される超音波振動子であつ
て、保持ゴムは筒状に形成されその内部に超音波
素子を保持すると共に、保持ゴムの表面に所定間
隔毎に突起を形成し、該突起により素子ホルダと
超音波素子との間に密閉されない空気層を設け、
該密閉されない空気層を介して超音波素子を素子
ホルダ内に固定するようにしたことを特徴とする
ものである。
(Means for Solving the Problems) The present invention is an ultrasonic transducer constructed by mounting an ultrasonic element in an element holder via a holding rubber. While holding the ultrasonic element, protrusions are formed at predetermined intervals on the surface of the holding rubber, and the protrusions provide an unsealed air space between the element holder and the ultrasonic element;
The present invention is characterized in that the ultrasonic element is fixed within the element holder via the unsealed air layer.
（作用）
このような特徴を有する本考案によれば、超音
波素子を素子ホルダ内に保持する保持ゴムを円筒
状としその側面に線状の突起を有するように形成
しており、ホルダの内面に線接触させるようにし
ている。従つて保持ゴムと超音波素子の素子ホル
ダ間に空気層が形成されることとなり、超音波素
子を駆動した場合にはその間で一旦空気層に伝わ
つて超音波が伝播することとなる。(Function) According to the present invention having such features, the holding rubber that holds the ultrasonic element in the element holder is formed into a cylindrical shape and has a linear protrusion on its side surface, so that the inner surface of the holder I am trying to make the line touch the line. Therefore, an air layer is formed between the holding rubber and the element holder of the ultrasonic element, and when the ultrasonic element is driven, ultrasonic waves are transmitted to the air layer between them and propagate.
（考案の効果）
そのため本考案によれば、空気層を介して超音
波が伝播するため超音波が減衰し易い。従つて超
音波素子を駆動した後は残響が速やかに減衰す
る。従つて超音波の駆動を終えた後速やかに超音
波の反射波信号を受信することができる。それ故
超音波スイツチに近い近距離の物体を検出する近
距離用の超音波スイツチを構成することが可能と
なる。(Effect of the invention) Therefore, according to the invention, the ultrasonic waves propagate through the air layer, so the ultrasonic waves are easily attenuated. Therefore, after driving the ultrasonic element, the reverberation attenuates quickly. Therefore, the reflected ultrasonic wave signal can be received immediately after the ultrasonic drive is finished. Therefore, it is possible to construct a short-range ultrasonic switch that detects objects at a short distance near the ultrasonic switch.
第１図は本考案の一実施例による超音波素子の
組立構成図であり、第２図は組立てた後の超音波
スイツチの断面図である。これらの図において従
来例と同一部分は同一符号を付している。さて本
考案においても円筒形の超音波素子１の周囲に保
持ゴム１０を取付ける。保持ゴム１０は円筒形に
構成されており超音波素子１の外周に密着して取
付けるものとする。さて本実施例ではこの保持ゴ
ム１０は図示のように円筒軸に沿つた線状の突起
１１ａ，１１ｂ……１１ｆが設けられる。これら
の線状突起１１ａ〜１１ｆは第２図に示すように
断面三角形状に形成されている。そしてこれらの
線状突起の間隔は例えば線状突起を構成する三角
形の底辺の２倍〜４倍程度毎に設けるものとし、
全周にわたつて等間隔に形成するものとする。さ
てこうして構成された保持ゴム１０を超音波素子
１に取付けて素子ホルダ３内に装着し、超音波素
子１の裏面よりフツクを設けて固定することは前
述した従来例と同様である。こうして超音波振動
子を形成すると、保持ゴム１０の突起１１ａ〜１
１ｆの先端が素子ホルダ３の内面に線接触するた
め接触面積を大幅に少なくし、その間に空気層を
設けることができる。
FIG. 1 is an assembled configuration diagram of an ultrasonic device according to an embodiment of the present invention, and FIG. 2 is a sectional view of the ultrasonic switch after assembly. In these figures, the same parts as in the conventional example are given the same reference numerals. Now, also in the present invention, a holding rubber 10 is attached around the cylindrical ultrasonic element 1. The holding rubber 10 has a cylindrical shape and is attached to the outer periphery of the ultrasonic element 1 in close contact with it. In this embodiment, the holding rubber 10 is provided with linear protrusions 11a, 11b, . . . 11f along the cylindrical axis as shown in the drawing. These linear protrusions 11a to 11f are formed to have a triangular cross section as shown in FIG. The spacing between these linear protrusions is, for example, approximately twice to four times the base of the triangle constituting the linear protrusions.
They shall be formed at equal intervals all around the circumference. The holding rubber 10 constructed in this manner is attached to the ultrasonic element 1, placed in the element holder 3, and fixed by providing a hook from the back side of the ultrasonic element 1, as in the conventional example described above. When the ultrasonic transducer is formed in this way, the protrusions 11a to 1 of the holding rubber 10 are
Since the tip of 1f is in line contact with the inner surface of the element holder 3, the contact area can be greatly reduced and an air layer can be provided therebetween.
本考案では超音波素子１を駆動すると側面より
漏洩する超音波は保持ゴム１０に伝播し、空気層
を介して素子ホルダ３との間で反射する。しかし
その間に空気層を挟んでいるため空気層での減衰
が大きく、超音波素子１の駆動を停止すると残響
は速やかに停止することとなる。従つて残響の影
響を極めて少なくすることができる。そしてこの
超音波振動子を用いて超音波スイツチを構成した
場合には、超音波スイツチ近傍の物体を検出する
ことが可能となる。 In the present invention, when the ultrasonic element 1 is driven, ultrasonic waves leaking from the side surface propagate to the holding rubber 10 and are reflected between the element holder 3 and the element holder 3 via an air layer. However, since there is an air layer between them, the attenuation in the air layer is large, and when the driving of the ultrasonic element 1 is stopped, the reverberation immediately stops. Therefore, the influence of reverberation can be extremely reduced. When an ultrasonic switch is configured using this ultrasonic transducer, it becomes possible to detect objects near the ultrasonic switch.
第１図は本考案の一実施例による超音波振動子
の組立構成図、第２図はその断面図、第３図は従
来の超音波振動子の一例を示す組立構成図であ
る。
１……超音波素子、２，１０……保持ゴム、３
……素子ホルダ、４……フツク、１１ａ〜１１ｆ
……線状突起。
FIG. 1 is an assembled configuration diagram of an ultrasonic transducer according to an embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is an assembled configuration diagram showing an example of a conventional ultrasonic transducer. 1... Ultrasonic element, 2, 10... Holding rubber, 3
...Element holder, 4...Hook, 11a to 11f
... Linear projection.
Claims (1)
取付けて構成される超音波振動子において、 前記保持ゴムは筒状に形成されその内部に前記
超音波素子を保持すると共に、前記保持ゴムの表
面に所定間隔毎に突起を形成し、該突起により前
記素子ホルダと前記超音波素子との間に密閉され
ない空気層を設け、該密閉されない空気層を介し
て前記超音波素子を素子ホルダ内に固定するよう
にしたことを特徴とする超音波振動子。[Claims for Utility Model Registration] In an ultrasonic transducer configured by attaching an ultrasonic element to an element holder via a holding rubber, the holding rubber is formed into a cylindrical shape and holds the ultrasonic element inside thereof. At the same time, protrusions are formed on the surface of the holding rubber at predetermined intervals, and the protrusions provide an unsealed air layer between the element holder and the ultrasonic element, and the ultrasound is transmitted through the unsealed air layer. An ultrasonic transducer characterized in that a sonic element is fixed within an element holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6697587U JPH0532783Y2 (en) | 1987-05-01 | 1987-05-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6697587U JPH0532783Y2 (en) | 1987-05-01 | 1987-05-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63175877U JPS63175877U (en) | 1988-11-15 |
| JPH0532783Y2 true JPH0532783Y2 (en) | 1993-08-20 |
Family
ID=30905468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6697587U Expired - Lifetime JPH0532783Y2 (en) | 1987-05-01 | 1987-05-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0532783Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007139607A (en) * | 2005-11-18 | 2007-06-07 | Ricoh Elemex Corp | Sensor mounting structure of ultrasonic flowmeter |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5607990B2 (en) * | 2010-05-14 | 2014-10-15 | パナソニック株式会社 | Ultrasonic sensor |
-
1987
- 1987-05-01 JP JP6697587U patent/JPH0532783Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007139607A (en) * | 2005-11-18 | 2007-06-07 | Ricoh Elemex Corp | Sensor mounting structure of ultrasonic flowmeter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63175877U (en) | 1988-11-15 |
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