JPH0472721U

JPH0472721U -

Info

Publication number: JPH0472721U
Application number: JP11577090U
Authority: JP
Priority date: 1990-11-01
Filing date: 1990-11-01
Publication date: 1992-06-26

Description

[Brief explanation of the drawing]

第１図は本考案の第１の実施例による圧電振動
子を示す斜視図、第２図は同圧電振動子の上下面
に形成された電極を示す平面図、第３図は同圧電
振動子の性能を示す電圧ゲイン特性図、第４図は
同第２の実施例による圧電振動子を示す斜視図、
第５図は同圧電振動子の上下面に形成された電極
を示す平面図、第６図は同第３の実施例による圧
電振動子を示す斜視図、第７図は同圧電振動子の
上下面に形成された電極を示す平面図、第８図は
同第４の実施例による圧電振動子を示す斜視図、
第９図は同圧電振動子の上下面に形成された電極
を示す平面図、第１０図は従来例の圧電振動子を
示す斜視図、第１１図は同圧電振動子の上下面に
形成された電極を示す平面図である。１……圧電素子、２……振動電極、３……引出
し電極、４……取出し電極、５……振動電極、６
……取出し電極、７……振動電極、８……振動電
極、９……振動電極、１０……引出し電極。 FIG. 1 is a perspective view showing a piezoelectric vibrator according to a first embodiment of the present invention, FIG. 2 is a plan view showing electrodes formed on the upper and lower surfaces of the piezoelectric vibrator, and FIG. 3 is a plan view of the same piezoelectric vibrator. FIG. 4 is a perspective view showing the piezoelectric vibrator according to the second embodiment,
FIG. 5 is a plan view showing electrodes formed on the top and bottom surfaces of the piezoelectric vibrator, FIG. 6 is a perspective view showing the piezoelectric vibrator according to the third embodiment, and FIG. 7 is a top view of the piezoelectric vibrator. FIG. 8 is a plan view showing the electrodes formed on the lower surface; FIG. 8 is a perspective view showing the piezoelectric vibrator according to the fourth embodiment;
FIG. 9 is a plan view showing electrodes formed on the top and bottom surfaces of the piezoelectric vibrator, FIG. 10 is a perspective view showing a conventional piezoelectric vibrator, and FIG. 11 is a plan view showing electrodes formed on the top and bottom surfaces of the piezoelectric vibrator. FIG. 1... Piezoelectric element, 2... Vibrating electrode, 3... Extracting electrode, 4... Extracting electrode, 5... Vibrating electrode, 6
... Extraction electrode, 7... Vibration electrode, 8... Vibration electrode, 9... Vibration electrode, 10... Extraction electrode.

Claims

[Claims for Utility Model Registration] (1) A rectangular vibrating electrode in the center and a linear extraction from one side of the quadrilateral to one side of the quadrilateral with an extremely thin extraction electrode on one side of the end. On the top surface of a plate-shaped piezoelectric element having an electrode shape cross-connected to the electrodes on the bottom surface, a bottom part that becomes an extraction electrode and a vertical part that becomes a vibration electrode are placed on the side opposite to the side on which the linear extraction electrode is provided. A convex electrode forming a section is provided so as to overlap the vibrating electrode disposed on the lower surface with the piezoelectric element in between, and the width dimension of the vertical section of the convex electrode is equal to the width of the quadrilateral provided at the center of the lower surface. A piezoelectric vibrator that is wider than any side of the vibrating electrode, and the height of the vertical part of the convex electrode reaches a part of the extraction electrode drawn out from the quadrilateral vibrating electrode. (2) The convex electrode provided on the upper surface has an equal width such that the vertical portion thereof overlaps the rectangular vibrating electrode provided at the center of the lower surface with the piezoelectric element in between. piezoelectric vibrator. (3) The convex electrode provided on the upper surface has a vertical portion having a narrow width such that it overlaps the rectangular vibrating electrode provided at the center of the lower surface with the piezoelectric element in between. piezoelectric vibrator. (4) An electrode shape asymmetrical to the electrode shape provided on the bottom surface is provided on the top surface with the piezoelectric element in between, and a quadrilateral vibrating electrode is provided in the center of one of the top and bottom surfaces, and a quadrilateral vibrating electrode is provided in the center of the other surface. 2. The piezoelectric vibrator according to claim 1, wherein the piezoelectric vibrator has a larger area than the vibrating electrode.