JPH0349535U

JPH0349535U -

Info

Publication number: JPH0349535U
Application number: JP10366889U
Authority: JP
Priority date: 1989-09-04
Filing date: 1989-09-04
Publication date: 1991-05-15
Anticipated expiration: 2004-09-04
Also published as: JP2531710Y2

Description

[Brief explanation of the drawing]

第１図は、本考案の第１実施例を示す絞り装置
の分解斜視図、第２図は、上記第１実施例の絞り
装置の縦断面図、第３図は、上記第１実施例の絞
り装置の要部のみを示す正面図、第４図は、本考
案の第２実施例を示す絞り装置の分解斜視図、第
５図および第６図は、上記第２実施例の絞り装置
の縦断面図および要部正面図、第７図および第８
図は、圧電セラミツクスで構成される超音波振動
子の一例および他の例をそれぞれ示す斜視図、第
９図は、上記超音波振動子の分極方向を示す拡大
断面図、第１０図Ａ，Ｂは、上記超音波振動子の
分極方向に対する印加電圧と発生歪をそれぞれ示
した拡大断面図、第１１図は、上記超音波振動子
の屈曲共振運動を示す線図、第１２図は、上記超
音波振動子の楕円共振運動を示す線図、第１３図
は、上記超音波振動子を楕円共振運動させる場合
の電気回路の一例を示す結線図、第１４，１５，
１６図は、従来の絞り装置をそれぞれ示す斜視図
である。１……超音波振動子、３……絞り羽根、５……
矢車、６，１１……保持部材、７，１１ｃ，１１
ｄ……付勢部材、８，９……固定部材。 FIG. 1 is an exploded perspective view of a diaphragm device showing a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the diaphragm device of the first embodiment, and FIG. 3 is a longitudinal sectional view of the diaphragm device of the first embodiment. FIG. 4 is an exploded perspective view of the diaphragm device showing a second embodiment of the present invention, and FIGS. 5 and 6 are front views showing only the main parts of the diaphragm device. Longitudinal sectional view and main part front view, Figures 7 and 8
The figures are perspective views showing one example and another example of an ultrasonic vibrator made of piezoelectric ceramics, FIG. 9 is an enlarged sectional view showing the polarization direction of the ultrasonic vibrator, and FIGS. 10A and B 11 is an enlarged cross-sectional view showing the applied voltage and generated strain in the polarization direction of the ultrasonic transducer, FIG. 11 is a diagram showing the bending resonance motion of the ultrasonic transducer, and FIG. Fig. 13 is a diagram showing the elliptical resonance motion of the ultrasonic transducer, and connection diagrams 14, 15, and 15 are diagrams showing an example of an electric circuit when the ultrasonic transducer is caused to move in elliptical resonance.
FIG. 16 is a perspective view showing each conventional diaphragm device. 1... Ultrasonic transducer, 3... Aperture blade, 5...
Arrow wheel, 6, 11...Holding member, 7, 11c, 11
d...Biasing member, 8, 9...Fixing member.

Claims

[Scope of Claim for Utility Model Registration] A vibrator that generates a standing wave-type bending vibration that rotates around a neutral axis, and rotates approximately the antinode of the bending vibration around the neutral axis; a arrow wheel which is movably attached and which changes the aperture diameter of the diaphragm blades by being rotated; a holding member which holds approximately the nodal portion of the bending vibration on the surface of the vibrator; Provided between the holding member and the fixing member, by urging the holding member in the arrow direction,
A diaphragm device comprising: a biasing member that presses substantially the antinode portion of the bending vibration against the outer circumferential surface of the arrow wheel.