JPH066808Y2 - Ultrasonic processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an ultrasonic treatment device for performing treatment such as prostatectomy and calculus destruction by ultrasonic vibration.

[Conventional technology]

BACKGROUND ART Conventionally, transurethral resection of the prostate has been performed by cauterizing the affected tissue with a high-frequency current. However, such ablation degenerates the cauterized living tissue, so that it is difficult to determine the ablation range, and there is a risk that even normal tissue will be ablated.

Therefore, ablation has recently been performed with an ultrasonic treatment device. This includes Japanese Patent Applications Nos. 60-1201, 6
As shown in No. 0-210510 and the like, a probe formed of a pipe or the like that can be inserted into a living body, that is, a structure in which an ultrasonic transducer is connected to a base of a vibration transmission member via a horn is used. ing. Then, the tip of the probe is pressed against the prostate using an endoscope or the like, and ultrasonic vibration is applied to the tissue to excise it. Of course, this also applies when destroying stones.

FIG. 10 shows a conventional ultrasonic treatment apparatus. Reference numeral 1 denotes a cover that constitutes the grip portion 2, and an ultrasonic transducer 3 is provided inside the cover 1. The ultrasonic transducer 3 includes a plurality of disk-shaped piezoelectric elements 4 ... And a plurality of electrodes 5.
The ultrasonic transducer 3 has a conical horn 6 at the front and a back mass 7 as a columnar backing plate at the rear. The ultrasonic vibrator 3, the horn 6, and the back mass 7 are firmly tightened and fixed by a bolt 8 penetrating the inside of the ultrasonic vibrator 3, the horn 6, and the back mass 7, and a tightening nut 9 screwed to the bolt 8 to form a Langevin type vibrator. Has been done. further,
A probe 10 as a vibration transmitting member made of a rod is connected to the tip of the horn 6.

Further, lead wires 11 for applying a voltage are connected to the respective piezoelectric elements 4 forming the ultrasonic vibrator 3, and these lead wires 11 project to a part of the outer peripheral edge of the electrode 5. One end is connected to the lead wire connecting portion 12 formed of a tongue provided, and the other end is converged and led out from the rear end of the cover 2.

In addition, the adjacent lead wire connecting portions 12 are provided 180 degrees apart so that the lead wire connecting portions 12 protruding from the electrode 5 do not interfere with each other.
The lead wires 11 ... Are converged at two positions, the upper part and the lower part, of the ultrasonic transducer 3 by shifting the phase.
In order to prevent the cover 2 from becoming bulky due to the converging of 1 ... As shown in FIG. 11, recesses 13 and 13 are provided in the upper and lower portions of the outer periphery of the back mass 7, and the lead wires are provided in these recesses 13 and 13. 11 ... is stored.

Further, instead of the concave grooves 13 and 13, as shown in FIG. 12, the through holes 1 are formed in the upper and lower peripheral portions of the back mass 7.
4 and 14 are bored, and the lead wire 1 is inserted into the through holes 14 and 14.
1 is inserted.

[Problems to be solved by the device]

However, as described above, providing the concave groove 13 and the through hole 14 in the back mass 7 is difficult to process, and the lead wire 11 is placed along or inserted into the concave groove 13 and the through hole 14. Is very difficult.

The present invention was made in view of the above circumstances, and the purpose thereof is to provide a bulky lead wire without performing a troublesome work of providing a recess groove or a through hole in a back mass and storing the lead wire. It is an object of the present invention to provide an ultrasonic treatment device that can eliminate the above and reduce the overall size.

[Means and Actions for Solving the Problems]

In order to achieve the above-mentioned object, the present invention comprises an ultrasonic transducer composed of a plurality of piezoelectric elements and electrodes for applying a voltage to these piezoelectric elements, and connects the lead wire to the peripheral portion of each electrode. Is provided, and these lead wire connecting portions are arranged so as to be displaced in the circumferential direction of the ultrasonic transducer with respect to the lead wire connecting portions of the other electrodes.

Then, the lead wires connected to the lead wire connecting portion are not bundled in one place, preventing bulkiness, and
Prevents entanglement of lead wires.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. However, the same components as those of the related art will be designated by the same reference numerals and description thereof will be omitted.

1 and 2 show the first embodiment, in which an ultrasonic transducer 3 is constructed by alternately arranging a plurality of disk-shaped piezoelectric elements 4 ... And a plurality of electrodes 5. A cone-shaped horn 6 is arranged at the front part of the ultrasonic transducer 3, and a back mass 7 as a columnar backing plate is arranged at the rear part. A lead wire connecting portion 12 formed of a tongue piece is projected on a part of the outer peripheral edge of each of the electrodes 5 ..., and the ultrasonic transducer 3 is arranged so that these lead wire connecting portions 12 ... Do not interfere with each other. Are sequentially shifted in the circumferential direction. Further, one end of a lead wire 11 for applying a voltage to each of the piezoelectric elements 4 is connected to these lead wire connecting portions 12 by soldering or the like, and the other end is formed on the outer periphery of the back mass 7. Wired along the axial direction.

According to such a configuration, the lead wires 11 connected to the respective electrodes 5 are arranged one by one in the circumferential direction without being focused on a part of the outer peripheral portion of the ultrasonic transducer 3, Lead wire 11 ... Does not become entangled with each other and does not become bulky. Therefore, the diameter of the cover 1 containing the ultrasonic transducer 3 can be reduced, that is, the entire size can be reduced. Further, since the lead wire connecting portions 12 ... Are displaced in the circumferential direction, it is easy to connect the lead wires 11 to the lead wire connecting portions 12 and wiring work is also easy.

3 and 4 show a second embodiment, in which a plurality of through holes 15 are formed in the outer peripheral edge portion of the back mass 7 in the axial direction thereof.
, And the lead wires 11 connected to the lead wire connecting portions 12 arranged so as to be displaced in the circumferential direction of the ultrasonic transducer 3 in the same manner as in the first embodiment. It was inserted through.

With such a configuration, the lead wires 11 ... Are not exposed at the outer peripheral portion of the back mass 7, the lead wires 11 ... Do not interfere with the inner surface of the cover 1, and the diameter of the cover 1 can be further reduced.

In the Langevin type transducer configured as described above, the ultrasonic transducer 3, the horn 6 and the back mass 7 are
The bolt 8 penetrating the inside of the bolt 8 and the tightening nut 9 screwed into the bolt 8 are firmly tightened and fixed. However, the tightening nut 9 is easily loosened by vibration, and even if it is slightly loosened, the original function is fulfilled. Disappear. However, as shown in FIG. 5, the tightening nut 9 is screwed onto the bolt 8 and the locking nut 16 is screwed onto the bolt 8 to form a double nut, thereby preventing the tightening nut 9 from loosening. it can.

Further, as shown in FIG. 6, the end faces of the tightening nut 9 and the loosening prevention nut 16, the end faces of the tightening nut 9 and the back mass 7 and the fastening nut 9, and the screwing portion of the loosening prevention nut 16 and the bolt 8 are joined together. Are adhered by the adhesive 17 ..., so that the loosening prevention becomes more reliable.

Further, during ultrasonic vibration of the ultrasonic vibrator 3, a reflecting surface is provided on a part of the ultrasonic vibrator 3 as a means for optically measuring the vibration characteristic, and a photonics sensor (optical Although a vibration meter probe is applied, it is common to attach a reflection tape or the like to the end surface of the tightening nut 9 to form a reflection surface. However, as shown in FIG. 7, the whole or a part of the end surface of the tightening nut 9 is mirror-finished and the mirror surface is used as the reflecting surface 17, so that highly accurate vibration characteristics can be achieved.

Further, the ultrasonic transducer 3 is configured by laminating a plurality of polarized piezoelectric elements 4 ... However, since the piezoelectric elements 4 have the same shape, there is a possibility that the polarization direction may be wrong during assembly. . However, as shown in FIG. 8, a mark 1 formed by a V-shaped notch on a part of the outer peripheral surface of each piezoelectric element 4 ...
By providing 8, the piezoelectric element 4 ...
There is no mistake in the direction when stacking. Note that the mark 18 is not limited to the notch, and a seal may be attached, or marking with paint may be used. Further, as shown in FIG. 9, the same effect can be obtained by vapor-depositing electrode portions 5a and 5b such as silver electrodes having different patterns for each polarization on each piezoelectric element 4.

[Effect of device]

As described above, according to the present invention, the lead wire connecting portion provided at the peripheral portion of each electrode is displaced in the circumferential direction of the ultrasonic transducer, so that one lead wire is connected to the lead wire connecting portion. Therefore, it is possible to eliminate the bulkiness, reduce the diameter of the cover, and downsize the whole. Moreover, there is an effect that the entanglement of the lead wires is prevented and the assembling workability is improved.

[Brief description of drawings]

1 is a perspective view of an ultrasonic transducer showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG.
FIG. 4 is a vertical sectional side view of an ultrasonic treatment apparatus showing a second embodiment of the present invention, FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, FIG. 5, FIG. 6, FIG. FIG. 8 is a partially cutaway side view of an ultrasonic transducer having a different structure, FIG. 9 is a perspective view showing a modified example of a piezoelectric element, and FIG. 10 is a vertical sectional side view of a conventional ultrasonic treatment device. 11 and 12 are cross-sectional views showing conventional examples of different ultrasonic transducers. 1 ... Cover, 3 ... Ultrasonic transducer, 4 ... Piezoelectric element,
5 ... Electrode, 6 ... Horn, 10 ... Probe, 11 ...
... lead wire, 12 ... lead wire connection part.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kazuya Hijii 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Shoichi Gotanda 2-43 Hatagaya, Shibuya-ku, Tokyo No. 2 Olympus Optical Co., Ltd. (72) Inventor Tomohisa Sakurai 2-43-2 Hatagaya, Shibuya-ku, Tokyo No. 2 Olympus Optical Co., Ltd. (72) Inventor Toshihiko Suzuta 2-43 Hatagaya, Shibuya-ku, Tokyo No. 2 Olympus Optical Co., Ltd. (72) Yuichi Ikeda 2-43 Hatagaya, Shibuya-ku, Tokyo No. 2 Olympus Optical Co., Ltd. (72) Inventor Hiroaki Kagawa 2-43 Hatagaya, Shibuya-ku, Tokyo No. 2 Olympus Optical Co., Ltd. (72) Inventor Eiichi Fuse 2-43-2 Hatagaya, Shibuya-ku, Tokyo Ori Path Optical Industry Co., Ltd. in the (72) inventor Tadao Hagino Shibuya-ku, Tokyo Hatagaya 2-chome No. 43 No. 2 Olympus Optical Industry Co., Ltd. in

Claims (1)

[Scope of utility model registration request] 1. An ultrasonic transducer comprising a plurality of piezoelectric elements and a plurality of electrodes for applying a voltage to these piezoelectric elements alternately arranged, and an ultrasonic vibration of the ultrasonic transducer is amplified by a horn. And an ultrasonic transmission member that transmits the
It is characterized in that lead wire connecting portions provided on the peripheral portions of the respective electrodes and connected to the lead wires are arranged so as to be offset from the lead wire connecting portions of the other electrodes in the circumferential direction of the ultrasonic transducer. Ultrasonic treatment device.