JPH0234154A - Ultrasonic probe - Google Patents
Ultrasonic probeInfo
- Publication number
- JPH0234154A JPH0234154A JP63184127A JP18412788A JPH0234154A JP H0234154 A JPH0234154 A JP H0234154A JP 63184127 A JP63184127 A JP 63184127A JP 18412788 A JP18412788 A JP 18412788A JP H0234154 A JPH0234154 A JP H0234154A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- vibrator
- voice coil
- coil
- yoke
- 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.)
- Pending
Links
- 239000000523 sample Substances 0.000 title claims description 10
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
Description
この発明は、振動子からの超音波ビームを所定軸線を中
心として所定中心角の扇形範囲に振らせて走査する探触
子であって、とくに走査のための駆動をボイスコイルモ
ータによった主として医用の超音波探触子に関する。The present invention is a probe that scans by swinging an ultrasonic beam from a transducer in a fan-shaped range having a predetermined center angle around a predetermined axis, and in particular, the drive for scanning is mainly performed by a voice coil motor. Regarding medical ultrasound probes.
従来例に、：′）いて、その要部の側断面図である第４
図を参照しながら説明する。第４図において、振動子２
１がハウジング２２に格納され、このハウジング２２は
回動軸２３の外周の上側に固着される。回動軸２３は、
その両側の各端部が軸受３３，３４によって支承され、
この軸受３３．３４は支持体３２に装着される。回動軸
２３には、ハウジング２２の左側に信号ケーブル用のり
−ル２５、また右側に傘歯車２７が固着される。この傘
歯車２７は図示しでないモータの出力軸２９に固着され
る傘歯車２８と噛み合う。なお、３０はシールで、出力
軸２９の外周に装着され、振動子２１を含む空間に充填
された、放射超音波の質を改善するための封入液がモー
タ側に浸透しないように封止する。３１は探触子用ケー
スで、これに先程の支持体３２はねし固定され、３６は
振動子２１を含む空間を形成するキャンプである。
ところで、振動子２１はリング状アレ・イ方式、または
アニユラアレイ方式と呼ばれるもので、単一振動素子を
同心円状の細かいリング状に分割し、各振動素子にかか
る電気信号の位相を制＠ｂ収束点をダイナミックに変化
させることができるようにしたものである。また、振動
子２１からの信号線はこの従来例では７本あり、接地線
とともに１本の信号ケーブルにまとめられ、リール２５
の螺旋状Ｕ字溝にゆるく巻き付けられて中継され、図の
下方に導かれて関係ユニットに接続される。
モータの出力軸２９が約９０度の範囲で回動すると、こ
の回動は傘歯車２８．２７を介して回動軸２３に伝達さ
れ、同時に振動子２１をハウジング２２とともに回動軸
２３の軸線のまわりに往復旋回させる。その結果、振動
子２１からの超音波ビームは回動軸２３の軸線のまわり
に約９０度の中心角の扇形範囲で振られる。In the conventional example, :') is shown in the fourth figure, which is a side sectional view of the main part.
This will be explained with reference to the figures. In Fig. 4, vibrator 2
1 is stored in a housing 22, and this housing 22 is fixed to the upper side of the outer periphery of the rotating shaft 23. The rotation shaft 23 is
Each end on both sides thereof is supported by bearings 33 and 34,
This bearing 33,34 is mounted on the support 32. A signal cable glue 25 is fixed to the left side of the housing 22 and a bevel gear 27 is fixed to the right side of the rotating shaft 23. This bevel gear 27 meshes with a bevel gear 28 fixed to an output shaft 29 of a motor (not shown). Note that 30 is a seal, which is attached to the outer periphery of the output shaft 29 and is used to seal so that the liquid filled in the space containing the transducer 21 and used to improve the quality of the radiated ultrasound does not penetrate into the motor side. . Reference numeral 31 denotes a probe case, to which the aforementioned support 32 is fixedly fixed, and 36 denotes a camp that forms a space containing the vibrator 21. By the way, the vibrator 21 is of a type called a ring array type or annular array type, in which a single vibrating element is divided into fine concentric rings, and the phase of the electric signal applied to each vibrating element is controlled @ b convergence. This allows the points to change dynamically. In addition, there are seven signal lines from the vibrator 21 in this conventional example, and they are combined into one signal cable together with the ground line, and the reel 25
The cable is loosely wrapped around the spiral U-shaped groove of the cable and relayed, guided downward in the figure and connected to the related units. When the output shaft 29 of the motor rotates within a range of approximately 90 degrees, this rotation is transmitted to the rotation shaft 23 via the bevel gears 28 and 27, and at the same time the vibrator 21 is moved along with the housing 22 to the axis of the rotation shaft 23. Rotate back and forth around. As a result, the ultrasonic beam from the transducer 21 is swung around the axis of the rotating shaft 23 in a fan-shaped range having a center angle of about 90 degrees.
以上説明したように、従来の技術では、振動子２１、お
よびこれを格納するハウジング２２は、回動軸２３に対
して偏って設置されるから、回動軸２３の回動に伴って
広いスペースを占有するとともに、回動軸２３のまわり
の慣性モーメント、ひいては回動負荷が大きくなり、こ
れに応じてモータ容量も大きくならざるを得ない。また
、関連して部品点数も多くなり、コスト低減が阻害され
る。
この発明の課題は、従来の技術がもつ以上の問題点を解
消し、構造が簡単で、部品点数が少なく、かつコスト低
減が図れる超音波探触子を従供することにある。As explained above, in the conventional technology, since the vibrator 21 and the housing 22 that houses it are installed biased to the rotation shaft 23, a large space is required as the rotation shaft 23 rotates. At the same time, the moment of inertia around the rotating shaft 23 and the rotating load become larger, and the motor capacity must also increase accordingly. Additionally, the number of parts increases, which impedes cost reduction. An object of the present invention is to provide an ultrasonic probe that solves the problems of the conventional techniques, has a simple structure, has a small number of parts, and can reduce costs.
この課題を解決するために、本発明に係る超音波探触子
は、
振動子からの超音波ビームを所定軸線を中心として所定
中心角の扇形範囲に振らせて走査する探触子において、
前記振動子を格納し前記所定軸線のまわりに揺動可能な
ハウジングと；
このハウジングに設けられるアームに固着され前記所定
軸線を中心とする円周の一部と軸線をほぼ一致させるコ
イルと；
永久磁石とヨークとからなり前記コイルとボイスコイル
モータを構成する磁界発生手段と；を備える。In order to solve this problem, an ultrasonic probe according to the present invention is a probe that scans an ultrasonic beam from a transducer by swinging it in a fan-shaped range having a predetermined center angle around a predetermined axis, and the above-mentioned a housing that houses a vibrator and is movable around the predetermined axis; a coil that is fixed to an arm provided in the housing and whose axis substantially coincides with a part of a circumference centered on the predetermined axis; a permanent magnet; and a yoke, the coil and the magnetic field generating means constituting the voice coil motor.
所定軸線のまわりに回動可能な振動子ハウジングに立設
したアームに固着されるコイルと、永久磁石とヨークと
からなる磁界発生手段とで構成されたボイスコイルモー
タによって、振動子は所定軸線のまわりの駆動モーメン
トを受ける。The oscillator is rotated around a predetermined axis by a voice coil motor, which is composed of a coil fixed to an arm installed in an erected vibrator housing that can rotate around a predetermined axis, and a magnetic field generating means consisting of a permanent magnet and a yoke. Receives the driving moment from the surroundings.
本発明に係る実施例について以下に図面を参照しながら
説明する。
第１図はこの実施例の要部である振動子駆動部の斜視図
で、同図において、２はハウジングで、図では見えない
振動子１（後述の第２図参照）を格納する偏平なほぼ方
形体状の容器である。このハウジング２には、その長辺
を含む対向側面の中心部に回動軸３が立設され、下側面
の中心部にアーム５が突設される。
アーム５の先端には、方形の中空部をもつコイル６が、
その軸線を回動軸３のまわりの円周とほぼ一致させるよ
うに固着される。７はヨークで、細長い方形の環状をな
す板状部材である。ヨーク７は、その長辺部が先程の円
周と一致するように湾曲し、この長辺部の一方がコイル
６の中空部を貫通するように設置される。また、コイル
６の中空部を貫通しない方の、ヨーク７の長辺部におい
ては、コイル６の外周面と対向する内側面に、同形に湾
曲した永久磁石８が固着される。ヨーク７と永久磁石８
とが磁界発生手段であり、この磁界発生手段とコイル６
とでボイスコイルモータを構成することになる。
さて、この実施例の全体的構成について、以下に第２図
、第３図を参照しながら説明する。第２図は実施例の正
面図、第３図は同じくその側面図である。第２図、第３
図において、振動子１．ハウジング２１回動軸３．゛７
−ム５．コイル６、ヨーク７および永久磁石８について
は既に説明したとおりである。４は外周にＵ字溝をもつ
リールで、ハウジング２の両側に回動軸３と同軸に設け
られて、振動子ｌからの信号線と接地線とをまとめた信
号ケーブルを巻き付け、関連箇所への導出を中継する。
回動軸３は、リール４の各外側箇所で軸受９によって支
承される。１１はシールで、既に従来例で説明したとお
りの機能をもつ。１２は回動軸３の一方の端部に固着さ
れる位置検出用の円板、工３は発光部、１４は受光部で
、これらによって回動軸３の回動位置検出用のエンコー
ダが構成される。
１０は枠で、これに軸受９．シール１１が装着され、ヨ
ーク７、受光部１４が取り付けられる。また、１８はキ
ャップ、１９はケースで、それぞれ従来例におけるキャ
ップ３６、ケース３１に相当する（第４図参照ン。なお
、発光部１３はケース１９の内側面に取り付けられる。
この実施例では、振動子１がコイル６、ヨーク７、永久
磁石８からなるボイスコイルモータによってほぼ９０度
の範囲で回動駆動される。しかもこの回動位置は、エン
コーダの出力、つまり受光部１４の出力に基づいて検出
され、これによって回動軸３の回動位置、ひいては振動
子１からの超音波ビームの放射方向が制御されることに
なる。
【発明の効果］
以上説明し、たように、この発明においては、所定軸線
のまわりに回動可能な振動子ハウジングに立設したアー
ムに固着されるコイルと、永久磁石とヨークとからなる
磁界発生手段とで構成されたボイスコイルモータによっ
て、振動子は所定軸線のまわりの駆動モーメントを受け
る。
したかつ−と、この発明によれば、従来の技術に比べ次
のようなすぐれた効果がある。
（１）ボイスコイルモータによる直接駆動形であるから
、構造が極めて簡素で、部品点数も少なくてすむ。さら
に部品の加工精度や組立精度をそれほど必要としないか
ら、低コスト化が図れる。同時にまた、小形化が図れる
。
（２）振動子の回動輪に関する慣性モーメント、ひいて
は回動負荷が小さくなり、回動の円滑化とモータの小容
量化とが図れる。
（３）動力伝達手段が不要であるから、伝達用歯車を用
いたのと比べて伝達遊隙がまったくなく、その結果、探
触子と接続される表示装置における画像の「ゆれＪを抑
制することができる。Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 is a perspective view of the vibrator drive unit, which is the main part of this embodiment. In the figure, 2 is a housing, which is a flat housing that houses the vibrator 1 (see Fig. 2 below), which is not visible in the figure. It is a nearly rectangular container. The housing 2 has a rotating shaft 3 erected at the center of the opposing side surface including its long sides, and an arm 5 protruding from the center of the lower side. At the tip of the arm 5 is a coil 6 having a rectangular hollow part.
It is fixed so that its axis substantially coincides with the circumference around the rotating shaft 3. Reference numeral 7 denotes a yoke, which is a plate-like member in the shape of an elongated rectangular ring. The yoke 7 is curved so that its long sides coincide with the aforementioned circumference, and is installed so that one of the long sides passes through the hollow part of the coil 6. Further, in the long side portion of the yoke 7 that does not penetrate the hollow portion of the coil 6, a permanent magnet 8 curved in the same shape is fixed to the inner surface facing the outer circumferential surface of the coil 6. Yoke 7 and permanent magnet 8
is a magnetic field generating means, and this magnetic field generating means and the coil 6
This constitutes a voice coil motor. Now, the overall configuration of this embodiment will be explained below with reference to FIGS. 2 and 3. FIG. 2 is a front view of the embodiment, and FIG. 3 is a side view thereof. Figures 2 and 3
In the figure, vibrator 1. Housing 21 rotation shaft 3.゛7
-mu5. The coil 6, yoke 7, and permanent magnet 8 are as already described. 4 is a reel with a U-shaped groove on the outer periphery, which is installed coaxially with the rotating shaft 3 on both sides of the housing 2, and is used to wind a signal cable including a signal line and a ground line from the vibrator 1, and to connect it to a related location. Relay the derivation of The pivot shaft 3 is supported by bearings 9 at each outer location of the reel 4 . 11 is a seal, which has the same function as already explained in the conventional example. Reference numeral 12 denotes a position detecting disk fixed to one end of the rotating shaft 3, numeral 3 indicates a light emitting section, and 14 indicates a light receiving section. These constitute an encoder for detecting the rotational position of the rotating shaft 3. be done. 10 is a frame, and a bearing 9 is attached to this frame. The seal 11 is attached, and the yoke 7 and the light receiving section 14 are attached. Further, 18 is a cap, and 19 is a case, which respectively correspond to the cap 36 and case 31 in the conventional example (see FIG. 4).The light emitting part 13 is attached to the inner surface of the case 19.In this embodiment, The vibrator 1 is rotated within a range of approximately 90 degrees by a voice coil motor consisting of a coil 6, a yoke 7, and a permanent magnet 8. Moreover, this rotation position is based on the output of the encoder, that is, the output of the light receiving section 14. As a result, the rotational position of the rotational shaft 3 and the radiation direction of the ultrasonic beam from the transducer 1 are controlled. [Effects of the Invention] As explained above, the present invention In the , the oscillator is operated by a voice coil motor consisting of a coil fixed to an arm installed in the oscillator housing that can rotate around a predetermined axis, and magnetic field generating means consisting of a permanent magnet and a yoke. Receives a driving moment around a predetermined axis.According to this invention, there are the following superior effects compared to the conventional technology: (1) Since it is a direct drive type using a voice coil motor, The structure is extremely simple, and the number of parts is small.Furthermore, it does not require much precision in processing or assembling parts, so costs can be reduced.At the same time, it can also be made smaller.(2) Rotating wheel of the vibrator The moment of inertia of the motor and the rotational load are reduced, making rotation smoother and reducing the capacity of the motor. (3) Since no power transmission means is required, the transmission speed is lower than when using transmission gears. There is no play, and as a result, it is possible to suppress "shaking" of the image on the display device connected to the probe.
第１図は本発明に係る実施例の要部の斜視図、第２図は
この実施例の正面図、
第３図は同じ（その側面図、
第４図は従来例の側面図である。
符号説明
１：振動子、２：ハウジング、３：回動軸、５：アーム
、６：コイル、７：ヨーク、第１目
肩４０Fig. 1 is a perspective view of the main parts of an embodiment according to the present invention, Fig. 2 is a front view of this embodiment, Fig. 3 is the same (a side view thereof, and Fig. 4 is a side view of a conventional example). Symbol explanation 1: Vibrator, 2: Housing, 3: Rotation axis, 5: Arm, 6: Coil, 7: Yoke, 1st shoulder 40
Claims (1)
所定中心角の扇形範囲に振らせて走査する探触子におい
て、前記振動子を格納し前記所定軸線のまわりに揺動可
能なハウジングと；このハウジングに設けられるアーム
に固着され前記所定軸線を中心とする円周の一部と軸線
をほぼ一致させるコイルと；永久磁石とヨークとからな
り前記コイルとボイスコイルモータを構成する磁界発生
手段と；を備えることを特徴とする超音波探触子。1) A probe that scans an ultrasonic beam from a transducer by swinging it in a fan-shaped range having a predetermined center angle around a predetermined axis, which includes a housing that houses the transducer and is swingable around the predetermined axis; ; a coil that is fixed to an arm provided in the housing and whose axis substantially coincides with a part of the circumference centered on the predetermined axis; and a magnetic field generating means comprising a permanent magnet and a yoke and constitutes the coil and the voice coil motor. An ultrasonic probe comprising: and;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63184127A JPH0234154A (en) | 1988-07-23 | 1988-07-23 | Ultrasonic probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63184127A JPH0234154A (en) | 1988-07-23 | 1988-07-23 | Ultrasonic probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0234154A true JPH0234154A (en) | 1990-02-05 |
Family
ID=16147852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63184127A Pending JPH0234154A (en) | 1988-07-23 | 1988-07-23 | Ultrasonic probe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0234154A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1103222A3 (en) * | 1999-11-26 | 2004-01-02 | Matsushita Electric Industrial Co., Ltd. | Ultrasonic probe |
-
1988
- 1988-07-23 JP JP63184127A patent/JPH0234154A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1103222A3 (en) * | 1999-11-26 | 2004-01-02 | Matsushita Electric Industrial Co., Ltd. | Ultrasonic probe |
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