JPH0698389A - High-pressure resistance hydrophone - Google Patents

Abstract

PURPOSE:To improve the use of a cable and a connector and to facilitate the storage of the cable and the connector by connecting one of both end face sides of a cylindrical container to each line of a coaxial cable and using a connector connected to the cable as a coupling end which can be freely attached and detached. CONSTITUTION:A macromolecular piezoelectric material 2 is provided on either one end face sides of a cylindrical container 1 serving as a detecting surface of the shock waves. A drawing-out part 5 is led by a coaxial cable 9 and pressed by a spring 10 via a damper 8. A coupler 15 is provided on the other end face of the container 1 and the coupler 15 consists of a screw part 18 having a hole 17 at either one end sides of a metallic cylinder 16 and a circular groove 19 with the other end side used as an opening end. The part 18 is screwed at the inner circumference of the other end face of the container 1, and a waterproof rubber ring 20 is set into the groove 19. Then each line of the cable 9 is electrically connected to a metallic plate 25 through the hole 17 and a through hole 22 of a terminal plate 21. A cylindrical coupling tool 28 which contains a contact pin 26 and a coaxial cable 27 can be freely attached to an detached from the coupler 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high pressure resistant hydrophone, and more particularly to a high pressure resistant hydrophone for measuring a shock wave from a medical calculus breaking device.

[0002]

BACKGROUND OF THE INVENTION In recent years, with the development of medical equipment, calculi generated in, for example, the kidney have been crushed by shock waves from outside the body, and are known as calculus crushing devices. Generally, ultrasonic waves from the ultrasonic generator are focused on stones (focus)
To generate a shock wave. It is said that the shock wave of such a thing becomes about 1000 atmospheric pressure or more at the time of calculus crushing. Then, measure the level of these shock waves,
A high pressure resistant hydrophone has been proposed to clarify the causal relationship of calculus crushing. For example, one of these is by the applicant of the present application (July 3, 1992)
High pressure resistant hydrophone filed on 1st, reference number P9
206300)

[0003]

2. Description of the Related Art FIG. 3 (abc) is a view for explaining an example of such a high pressure resistant hydrophone. FIG. 3 (a) is a sectional view, FIG. 3 (b) is a plan view of a polymeric piezoelectric material, and FIG. FIG. (C) is a view of the tubular support tool. The high withstand voltage hydrophone has a polymeric piezoelectric material 2 provided on one end surface side of a cylindrical container 1 which serves as a shock wave detection surface. One end surface side (opening portion) of the cylindrical container 1 is closed by a protective plate 3. The polymer piezoelectric material 2 is, for example, P
It is made of VDF (polyvinylidene fluoride), and is made up of an exciting part 4 and a drawing part 5 (ab). The excitation electrode 6 (ab) is provided on both main surfaces of the excitation part 4, and the extraction electrode 7 (a) is provided on the extraction part 5, respectively.
b) is formed. The front surface of the excitation unit 4 contacts the protective plate 3, and the damper 8 is provided on the rear surface. Drawer 5 (a
B) is bent and adhered to the side surface of the damper 8, and is connected to each line of the coaxial cable 9. The rear end of the damper 8 is held by a tubular support 11 that is movable by a spring 10. The so-called polymeric piezoelectric material 2 is replaced by a spring 1
The pressure-bonding method is applied by pressing 0. However, if necessary, an adhesive may be interposed between the polymeric piezoelectric material 2 and the damper 8 and the protective plate 3 as required. In the figure, reference numeral 21 is a fixing plate, 13 is a fixing adhesive also serving as a waterproof, 1
4 is a coaxial connector (BNC), which is a coaxial cable 9
It is provided at the tip of and is connected to the terminal of the measuring instrument.

[0004]

However, in the high pressure resistant hydrophone having the above construction, the coaxial cable to which the connector is connected is led out from the other end surface side of the cylindrical container.
Therefore, there has been a problem that the utilization efficiency of the coaxial cable and the connector is poor, and the storage tends to be complicated during storage.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a high pressure resistant hydrophone which can be used efficiently and can be stored compactly.

[0006]

According to the present invention, the other end surface side of the above-mentioned cylindrical container is connected to each line of a coaxial cable electrically connected to a lead portion of a polymer piezoelectric material, and a connector to which the coaxial cable is connected is attached / detached. The solution means is that the connection end is freely attached. An embodiment of the present invention will be described below.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partial sectional view of a high pressure resistant hydrophone for explaining an embodiment of the present invention. It should be noted that the same parts as those of the previous conventional example are given the same numbers to simplify the description.
As described above, the high-withstand-pressure hydrophone is provided with the polymeric piezoelectric material 2 on one end surface side of the cylindrical container 1 serving as a shock wave detection surface, the lead-out portion 5 is led out by the coaxial cable 9, and the damper 8 is interposed. Then, it is pressed by the spring 10. Then, in this embodiment, the coupler 15 is provided on the other end surface side of the cylindrical container 1. The coupler 15 is provided with a threaded portion 18 having a hole 17 on one end side of a metal tube 16 and a circumferential groove 19, and the other end side is an open end. The threaded portion 18 is screwed onto the inner circumference of the tubular container 1 on the other end surface side, and a rubber ring 20 for waterproofing is fitted into the circumferential groove 19. The terminal plate 21 is fitted and fixed to the interlocking portion on the opening end side. The terminal board 21 is
A metal plate 25 divided by a groove 24 is provided on a resin substrate 23 having a through hole 22. Then, each line of the coaxial cable is electrically connected to the metal plate 25 through the hole 17 of the screw portion 18 and the through hole 22 of the terminal plate 21. And in actual use, the second
As shown in the figure, a tubular connector 28 having a contact pin 26 built-in and a coaxial cable 27 led out is prepared and detachably attached to the coupler 15 for use. A BNC is provided at the tip of the coaxial cable 27. Reference numeral 2 in the figure
Reference numeral 9 is a fixing plate, and 30 is a fixing adhesive that also serves as a waterproof.

With such a construction, the high-withstand-pressure hydrophone does not lead out the coaxial cable from the rear end surface of the cylindrical container 1, which is rational in management and improves the utilization efficiency. For example, even if damage occurs due to measurement of a shock wave, only the high pressure resistant hydrophone (cylindrical container 1) needs to be replaced. In short, one cylindrical connector 28 and a plurality of cylindrical containers 1 are prepared. If so, a plurality of high pressure resistant hydrophones are prepared.

[0009]

[Other Matters] In the above embodiments, the so-called pressure bonding method in which the polymeric piezoelectric material 2 is pressed by the spring 10 is used. However, the bonding method described in the opening patent application may be used. The polymeric piezoelectric material 2 provided with the pull-out portion 5 is provided on the damper 8 to be housed therein, and the coupler 15 is provided on the other end surface side thereof,
The method of connecting the coaxial cable to the connecting tool 28, which is led out, basically belongs to the technical scope of the present invention. The coupler 15 is not limited to the one in the embodiment, but can be freely changed. The point is that the other end of the cylindrical container 1 is a coupling end that substantially connects to the connector is the coupler here. . Also, although the connector BNC is used,
Of course, it may be other than this.

[0010]

According to the present invention, the other end surface side of the above-mentioned cylindrical container is connected to each line of the coaxial cable electrically connected to the lead-out portion of the polymeric piezoelectric material, and the connector to which the coaxial cable is connected is connected. Since the connection end is detachably attached, it is possible to provide a high pressure resistant hydrophone that can be used efficiently and can be stored compactly.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a high pressure resistant hydrophone for explaining an embodiment of the present invention.

FIG. 2 is a view of a connector applied to one embodiment of the present invention.

FIG. 3 is a view of a high pressure resistant hydrophone by the present applicant, in which FIG. 3A is a sectional view, FIG. 3B is a plan view of a polymeric piezoelectric material, and FIG. 3C is a cylindrical support. It is a figure.

[Explanation of symbols]

1, cylindrical container, 2 polymer piezoelectric material, 3 protective plate, 4 excitation part, 5 extraction part 6 excitation electrode, 7 extraction electrode, 8 damper, 9 coaxial cable, 10 spring, 11 cylindrical support, 12
Fixing plate, 13 Fixing adhesive, 14 BNC, 15
Coupler, 16 metal cylinder, 17 hole, 18 screw part, 19 orbital groove, 20 rubber ring, 21 terminal plate, 22 through hole, 23 resin substrate, 24 groove, 25
Metal plate, 26 contact pins, 27 coaxial cable,
28 connector, 29 fixing plate, 30 fixing adhesive.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadao Hirasawa 2 days 1275 Kamihirose, Sayama City, Saitama Prefecture

Claims (1)

[Claims] 1. A polymeric piezoelectric material having a lead-out portion extending from an exciting portion, a cylindrical container for accommodating a front surface of the exciting portion in close contact with one end face side, and a cylindrical container provided on a rear surface of the exciting portion. In a high pressure resistant hydrophone consisting of a damper that draws out the drawer part to the rear end side and a coaxial cable electrically connected to the drawer part, the other end surface side of the cylindrical container is connected to each line of the coaxial cable. The high-voltage hydrophone is characterized in that the connector to which the coaxial cable is connected is used as a connecting end to which the connector is detachably attached.