JPH01172800U

JPH01172800U -

Info

Publication number: JPH01172800U
Application number: JP6918888U
Authority: JP
Priority date: 1988-05-25
Filing date: 1988-05-25
Publication date: 1989-12-07

Description

[Brief explanation of the drawing]

第１図は本考案の原理図、第２図は本考案の実
施例を示す構成図、第３図は異なる実施例を示す
構成図、第４図は第３図の応用例を示す斜視図、
第５図は従来例を示す超音波探触子の側断面図、
第６図は従来例の変換素子の斜視図である。ある
。図において、１，１ａ〜１ｄは変換素子、３，
３ａ〜３ｃはケース、７は第３の電極、７ａ〜７
ｅ，１１ａ〜１１ｃ，１２ａ〜１２ｅは電極、１
１は第１の電極、１２は第２の電極、１３は第１
の面、１３ａ，１４ａは面、１４は第２の面、１
５，１５ａ，１５ｂは外周縁面、３０，３０ａ，
３０ｂは段部を示す。 Fig. 1 is a diagram showing the principle of the present invention, Fig. 2 is a block diagram showing an embodiment of the present invention, Fig. 3 is a block diagram showing a different embodiment, and Fig. 4 is a perspective view showing an application example of Fig. 3. ,
FIG. 5 is a side sectional view of an ultrasonic probe showing a conventional example;
FIG. 6 is a perspective view of a conventional conversion element. be. In the figure, 1, 1a to 1d are conversion elements, 3,
3a to 3c are cases, 7 is a third electrode, 7a to 7
e, 11a to 11c, 12a to 12e are electrodes, 1
1 is the first electrode, 12 is the second electrode, 13 is the first electrode.
surface, 13a and 14a are surfaces, 14 is the second surface, 1
5, 15a, 15b are outer peripheral edge surfaces; 30, 30a,
30b indicates a stepped portion.

Claims

[Claims for Utility Model Registration] An electroacoustic transducer 1 having a first electrode 11 on a disk-shaped first surface 13 and a second electrode 12 on a second surface 14, and a cylindrical shape made of an insulating material. a case 3 to which the electroacoustic transducer 1 with the second electrode 12 on the inside is joined at the end; a sound wave absorber housed in the case 3 and in contact with the entire surface of the second electrode 12; In an ultrasonic probe that transmits and receives ultrasonic waves from the electroacoustic transducer 1 by passing current between the first electrode 11 and the second electrode 12, the inner side of the end of the case 3 A stepped portion 30 is provided over the entire circumference of the case 3 , the first electrode 11 is formed from the first surface 13 to at least a portion of the outer peripheral edge surface 15 , and the second electrode 12 is formed on the case 3 . The diameter is slightly smaller than the inner diameter of the first electrode 11 of the stepped portion 30 of the case 3. A third electrode 7 is formed with a conductive film up to a predetermined position in the core direction, and the third electrode 7 of the stepped portion 30 and the outer peripheral edge surface 15
An ultrasonic probe characterized in that the first electrode 11 is joined to each other, and current is applied between the second electrode 12 and the third electrode 7.