JP2799883B2 - Ultrasonic probe - Google Patents
Ultrasonic probeInfo
- Publication number
- JP2799883B2 JP2799883B2 JP1187920A JP18792089A JP2799883B2 JP 2799883 B2 JP2799883 B2 JP 2799883B2 JP 1187920 A JP1187920 A JP 1187920A JP 18792089 A JP18792089 A JP 18792089A JP 2799883 B2 JP2799883 B2 JP 2799883B2
- Authority
- JP
- Japan
- Prior art keywords
- flexible printed
- circuit board
- printed circuit
- ultrasonic probe
- main 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は超音波探触子を利用分野とし、特に体腔内に
挿入して送受波する医用関係の小型な超音波探触子に関
する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an ultrasonic probe, and more particularly to a small medical ultrasonic probe which is inserted into a body cavity to transmit and receive waves.
（発明の背景） 超音波探触子は、医用等の超音波診断装置に超音波の
送受波部として有用される。近年では、例えば食道、肛
門、尿道等の体腔内部を検査する小型な超音波探触子が
開発されている。近年では、これらのものについて更に
小さくして患者の負担を軽減することが望まれている。(Background of the Invention) An ultrasonic probe is used as an ultrasonic wave transmitting / receiving unit in an ultrasonic diagnostic apparatus for medical use or the like. In recent years, small ultrasonic probes for examining the inside of a body cavity such as the esophagus, anus, and urethra have been developed. In recent years, it has been desired to further reduce these to reduce the burden on patients.
（従来技術） 第４図はこの種の一従来例を説明する超音波探触子の
図である。(Prior Art) FIG. 4 is a diagram of an ultrasonic probe for explaining a conventional example of this kind.
超音波探触子は、例えばジルコン酸チタン酸鉛（以
下、PZTとする）からなる圧電片１の複数個を並べてセ
クタ駆動される。各圧電片１の両主面には図示しない励
振電極が形成される。そして、一方の主面側にフレキシ
ブルプリント基板２の一端側を接続する。フレキシブル
プリント基板２は、各圧電片１の一方の主面側の励振電
極と接続する複数の信号路３とその外周に他方の主面側
の励振電極と接続する基準電位路４とが形成されてい
る。そして、圧電片１の一方の主面側を超音波の吸収及
び制動用としてのゴム系のバッキング材５の一面側に接
着する。バッキング材５の他面側には例えばガラスエポ
キシからなる基台６を固着する。そして、フレキシブル
プリント基板２の他端側を基台６上に固着する。フレキ
シブルプリント基板２の各端子部７（ａ、ｂ）には、図
示しないケーブルの各線路が接続する。そして、体腔内
に挿入される図示しない管の径方向に平面方向を一致さ
せて収納される。なお、圧電片の他方の主面側には図示
しない音響整合層や音響レンズ等が取着される。The ultrasonic probe is sector-driven by arranging a plurality of piezoelectric pieces 1 made of, for example, lead zirconate titanate (hereinafter, referred to as PZT). Excitation electrodes (not shown) are formed on both main surfaces of each piezoelectric piece 1. Then, one end side of the flexible printed circuit board 2 is connected to one main surface side. The flexible printed circuit board 2 has a plurality of signal paths 3 connected to an excitation electrode on one main surface of each piezoelectric piece 1 and a reference potential path 4 connected to the excitation electrode on the other main surface on the outer periphery thereof. ing. Then, one main surface side of the piezoelectric piece 1 is bonded to one surface side of a rubber-based backing material 5 for absorbing and damping ultrasonic waves. A base 6 made of, for example, glass epoxy is fixed to the other surface of the backing material 5. Then, the other end side of the flexible printed board 2 is fixed on the base 6. Each line of a cable (not shown) is connected to each terminal portion 7 (a, b) of the flexible printed circuit board 2. Then, the tube is accommodated in such a manner that the plane direction coincides with the radial direction of a tube (not shown) inserted into the body cavity. An acoustic matching layer, an acoustic lens, and the like (not shown) are attached to the other main surface side of the piezoelectric piece.
（従来技術の問題点） しかしながら、上記構成の超音波探触子では、フレキ
シブルプリント基板２の外周には基準電位路４を形成す
るので、その分平面形状の寸法を大きくする。したがっ
て、このようなものでは、各線路３及び基準電位路の幅
を最低限にしてもその小型化には制約があった。(Problems of the Related Art) However, in the ultrasonic probe having the above configuration, since the reference potential path 4 is formed on the outer periphery of the flexible printed circuit board 2, the size of the planar shape is increased accordingly. Therefore, in such a structure, even if the width of each line 3 and the reference potential path is minimized, there is a restriction in miniaturization.
（発明の目的） 本発明は、平面形状の寸法を減じて小型化した超音波
探触子を提供することを目的とする。(Object of the Invention) It is an object of the present invention to provide an ultrasonic probe which is reduced in size by reducing the size of a planar shape.
（解決手段） 本発明は、フレキシブルプリント基板の基準電位路を
除去し、この基準電位路をフレキシブルプリント基板と
バッキング材との間に介在させて形成したことを解決手
段とする。以下、本発明の一実施例を説明する。(Solution Means) The present invention is to solve the problem by removing the reference potential path of the flexible printed circuit board and forming the reference potential path between the flexible printed circuit board and the backing material. Hereinafter, an embodiment of the present invention will be described.
（実施例） 第１図は本発明の一実施例を説明する超音波探触子の
図である。なお、前従来例図と同一部分には同番号を付
与してその説明は簡略する。(Embodiment) FIG. 1 is a diagram of an ultrasonic probe for explaining an embodiment of the present invention. The same parts as those in the prior art are denoted by the same reference numerals, and description thereof will be simplified.
超音波探触子は、前従来例と同様に、圧電片１の複数
個を並べてセクタ駆動され、一方の主面側にフレキシブ
ルプリント基板２の一端側を接続する。フレキシブルプ
リント基板２は、各圧電片１の一方の主面側の励振電極
と接続する複数の信号路３のみ形成される。そして、圧
電片１の一方の主面側を、基台６に固着したバッキング
材５に接着する。基台６には上面及び一側面に基準電位
路となる金属体（例えば膜）８が形成されている。そし
て、圧電片１の他方の主面の励振電極と例えば図示しな
い導線により接続される。そして、フレキシブルプリン
ト基板２の他端側を直接基台６の上面（金属体面）に固
着し、端子部７とケーブル線路と接続した後、平面方向
を図示しない管径方向に一致させて収納する。The ultrasonic probe is sector-driven by arranging a plurality of piezoelectric pieces 1 in the same manner as in the conventional example, and connects one end of the flexible printed circuit board 2 to one main surface. The flexible printed circuit board 2 is formed with only a plurality of signal paths 3 connected to the excitation electrodes on one main surface side of each piezoelectric piece 1. Then, one main surface side of the piezoelectric piece 1 is bonded to the backing material 5 fixed to the base 6. On the base 6, a metal body (for example, a film) 8 serving as a reference potential path is formed on the upper surface and one side surface. Then, it is connected to the excitation electrode on the other main surface of the piezoelectric piece 1 by, for example, a conductor (not shown). Then, the other end side of the flexible printed circuit board 2 is directly fixed to the upper surface (metal body surface) of the base 6 and connected to the terminal portion 7 and the cable line, and then stored with the plane direction coincident with the tube diameter direction (not shown). .
したがって、このようなものでは、フレキシブルプリ
ント基板２の基準電位路を除去してこれを基台６に形成
したので、その平面形状を小さくして小型化を促進す
る。Therefore, in such a case, since the reference potential path of the flexible printed circuit board 2 is removed and formed on the base 6, the planar shape is reduced to promote downsizing.
（他の実施例） 第２図及び第３図は本発明の他の実施例を説明する超
音波探触子の図である。なお、前実施例と重複する部分
は省略して説明する。(Other Embodiment) FIGS. 2 and 3 are views of an ultrasonic probe for explaining another embodiment of the present invention. The description of the same parts as in the previous embodiment will be omitted.
この実施例では、フレキシブルプリント基板２の他端
側を基台６（バッキング材５）主面の延長方向（第２
図）、また側面の延長方向（第３図）に導出する。In this embodiment, the other end of the flexible printed circuit board 2 is extended in the direction of extension of the main surface of the base 6 (backing material 5) (second direction).
(Fig. 3) and the extension direction of the side surface (Fig. 3).
例えば、第２図においてはフレキシブルプリント基板
２をバッキング材５と基台６の側面に接着して他端側を
基台上面の延長方向に「同図（ａ）」、あるいは、各圧
電片１を固着するバッキング材下面の延長方向に導出す
る「同図（ｂ）」。For example, in FIG. 2, the flexible printed circuit board 2 is adhered to the backing material 5 and the side surface of the base 6 and the other end is extended in the direction of extension of the upper surface of the base as shown in FIG. Is drawn out in the direction of extension of the lower surface of the backing material to which the "A" is fixed, as shown in FIG.
また、第３図においては、フレキシブルプリント基板
２をバッキング材５と基台６の側面に接着して他端側を
そのまま側面の厚み方向の延長方向に「同図（ａ）」、
あるいは側面の幅方向の延長方向に「同図（ｂ）」導出
する。In FIG. 3, the flexible printed circuit board 2 is adhered to the backing material 5 and the side surface of the base 6 and the other end is directly extended in the thickness direction of the side surface as shown in FIG.
Alternatively, “(b) of the same drawing” is derived in the extension direction in the width direction of the side surface.
そして、各フレキシブルプリント基板２の各端子部7a
に接続用の図示しないフレキシブルプリント基板を設け
てそれぞれ信号路を延出する。但し、基準電位路用の端
子部7bとは図示しない線路により接続する。And each terminal part 7a of each flexible printed circuit board 2
And a flexible printed circuit board (not shown) for connection is provided to extend the signal path. However, it is connected to the terminal portion 7b for the reference potential path by a line not shown.
したがって、このようなものでも、前実施例同様に
は、平面形状を小さくして小型化を促進できる。そし
て、これらの場合には、フレキシブルプリント基板２の
他端側は基台６の表面面積以上にできるので、各端子部
間を大きくしてケーブル線路との接続作業を容易にす
る。但し、フレキシブルプリント基板２の延長方向を基
台主面あるいは側面方向ににするかは超音波の送出方向
（管への収納方向）によって左右される。また、この実
施例では接続用のフレキシブルプリント基板を使用して
信号路を導出したが、ケーブルの各線路と直接接続して
もよいことはもちろんである。Therefore, even in such a case, as in the previous embodiment, the planar shape can be reduced and the miniaturization can be promoted. In these cases, the other end of the flexible printed circuit board 2 can be made larger than the surface area of the base 6, so that the space between the terminals is increased to facilitate the connection with the cable line. However, whether the extension direction of the flexible printed circuit board 2 is set to the base main surface or the side surface direction depends on the ultrasonic wave transmission direction (the direction of storage in the tube). Further, in this embodiment, the signal path is derived using the flexible printed circuit board for connection, but it goes without saying that the signal path may be directly connected to each line of the cable.
（他の事項） なお、上記実施例では、複数個並べた圧電片１をセク
タ駆動するとしたが、これに限らずリニア駆動や単板と
しての駆動等であってもよい。さらに、必ずしも複数個
の圧電片を並べたものでなく単一の圧電板からなるもの
であっても適用するものである。また、各実施例におい
ては、付随適に基準電位路の面積を大きくするので、不
要雑音等の発生を防止することが期待できる。(Other Matters) In the above embodiment, the plurality of piezoelectric pieces 1 are sector-driven. However, the present invention is not limited to this, and linear driving or single-plate driving may be used. Furthermore, the present invention is not limited to the arrangement of a plurality of piezoelectric pieces but may be applied to a single piezoelectric plate. In each of the embodiments, since the area of the reference potential path is appropriately increased, it is expected that occurrence of unnecessary noise and the like can be prevented.
（発明の効果） 本発明は、フレキシブルプリント基板の基準電位路を
除去し、この基準電位路を基台に形成したので、平面形
状の寸法を減じて小型化した超音波探触子を提供でき、
その実際上の効果は大きい。(Effect of the Invention) According to the present invention, since the reference potential path of the flexible printed circuit board is removed and the reference potential path is formed on the base, it is possible to provide an ultrasonic probe which is reduced in size by reducing the planar shape. ,
Its practical effect is great.
第１図は本発明の一実施例を説明する超音波探触子の斜
視図、第２図（ａ）（ｂ）及び第３図（ａ）（ｂ）は本
発明の他の実施例を説明する超音波探触子の斜視図であ
る。 第４図は従来例を説明する超音波探触子の斜視図であ
る。FIG. 1 is a perspective view of an ultrasonic probe for explaining one embodiment of the present invention, and FIGS. 2 (a) and (b) and FIGS. 3 (a) and (b) show other embodiments of the present invention. It is a perspective view of the ultrasonic probe to be described. FIG. 4 is a perspective view of an ultrasonic probe for explaining a conventional example.
Claims (1)
と、前記各圧電片の一方の主面の電極に接続したフレキ
シブルプリント基板と、前記一方の主面側に固着したバ
ッキング材と、前記バッキング材を固着するとともに、
前記各圧電片の他方の主面の電極と接続して基準電位と
なる金属体が前記圧電片の背面側を覆うように全面的に
形成された基台とからなることを特徴とする超音波探触
子。1. A plurality of piezoelectric pieces having electrodes formed on both main surfaces, a flexible printed circuit board connected to an electrode on one main surface of each of the piezoelectric pieces, and a backing fixed to the one main surface. Material and the backing material,
An ultrasonic wave, wherein a metal body connected to an electrode on the other main surface of each of the piezoelectric pieces and serving as a reference potential is entirely formed so as to cover a back side of the piezoelectric pieces. Probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1187920A JP2799883B2 (en) | 1989-07-20 | 1989-07-20 | Ultrasonic probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1187920A JP2799883B2 (en) | 1989-07-20 | 1989-07-20 | Ultrasonic probe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0352500A JPH0352500A (en) | 1991-03-06 |
| JP2799883B2 true JP2799883B2 (en) | 1998-09-21 |
Family
ID=16214519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1187920A Expired - Fee Related JP2799883B2 (en) | 1989-07-20 | 1989-07-20 | Ultrasonic probe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2799883B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6175700A (en) * | 1984-09-21 | 1986-04-18 | Toshiba Corp | Ultrasonic probe and its manufacture |
-
1989
- 1989-07-20 JP JP1187920A patent/JP2799883B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0352500A (en) | 1991-03-06 |
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