JPH0439731U - - Google Patents

Description

[Brief explanation of the drawing]

FIGS. 1a and 1b are diagrams showing a piezoelectric tuning fork type vibrator according to a first embodiment of the present invention as seen from the front side, and diagrams showing the electrode structure on the back side as seen through the piezoelectric substrate from the front side, Figures 2a and 2b are diagrams for explaining a conventional piezoelectric tuning fork vibrator as seen from the front side, and diagrams showing the electrode structure on the back side as seen through the piezoelectric substrate from the front side, and Figure 3. 4 is a circuit diagram of a conventional piezoelectric tuning fork vibrator, FIG. 4 is a diagram rewritten from the circuit of FIG. 3 focusing on the polarization direction of the capacitive means, and FIG. Figures 6a and 6b are diagrams showing the electrode structure of the piezoelectric tuning fork type vibrator in the second embodiment of the present invention, where a is a view from the front side, and b is a view from the front side of the piezoelectric substrate. FIG. 7 is a circuit diagram of the piezoelectric tuning fork type vibrator of the embodiment shown in FIG. FIG. 9 is a perspective view showing a chip type piezoelectric vibrating element, and FIG. 10 is a perspective view showing a piezoelectric tuning fork type vibrator configured as a component with lead terminals. In the figure, 21 and 41 are piezoelectric tuning fork type vibrators;
22, 42 are piezoelectric substrates, 22a, 42a are first grooves, 22b, 22c, 42b, 42c are second and third grooves, 23, 43 are first vibrating electrodes, 24, 4
4 is a second vibrating electrode, 27 and 47 are first capacitor electrodes, 28 is a common capacitor electrode that also serves as the second and fourth capacitor electrodes, 30 and 50 are third capacitor electrodes, and 48a is a second capacitor Electrode 48b indicates the fourth capacitive electrode.

Claims (1)

[Claims for Utility Model Registration] A first groove that is polarized in the thickness direction and is formed to extend from one edge toward the center;
a piezoelectric substrate having second and third grooves extending from the one end edge toward the center in order to configure tuning fork vibrating arms on both sides of the first groove; first and second vibrating electrodes formed on the front and back surfaces of the piezoelectric substrate around the groove, respectively, and configured to be electrically connected to the outside; a first capacitor electrode connected to the piezoelectric substrate and formed on the back surface of the piezoelectric substrate; 2
a third capacitive electrode formed on the back surface of the piezoelectric substrate so as to be electrically connected to the second vibrating electrode; and a fourth capacitive electrode formed on the surface of the piezoelectric substrate so as to face each other, the first capacitive means is formed by the first and second capacitive electrodes, and the second capacitive means is formed by the third and fourth capacitive electrodes. A piezoelectric tuning fork type, characterized in that a capacitive means is configured, and a second capacitive electrode and a fourth capacitive electrode are electrically connected and drawn out in common on the surface side of a piezoelectric substrate. vibrator.