JPS5934354U - raindrop sensor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is an exploded perspective view, FIG. 2 is a vertical sectional view, FIG. 3 is a circuit diagram, and FIG. 4 is a detection diagram. The electrical circuit diagrams of the circuit, FIGS. 5 and 6, show the second embodiment of the present invention.
The figure is an exploded perspective view, FIG. 6 is a circuit diagram, FIG. 7 is an exploded perspective view showing a third embodiment of the present invention, FIG. 8 is a vertical sectional view showing a different embodiment of the present invention, and FIG. 4 is an electrical circuit diagram of a detection circuit different from that in FIG. 4. FIG. In the drawing, 1 is a window glass, 2 is a raindrop sensor, 3 and 4 are dielectric materials, 5 is a first electrode body, 6 is a second electrode body,
7 is a detection interval, 8 is a third electrode body, 9 is a fourth electrode body, 10 is a first capacitor, 11 is a second capacitor 1
, 17 and 18 are capacitors, 19 is a detection circuit, A is an oscillator, 25 is a raindrop, 26 is a second electrode body, 28 is a capacitor, 29 is a third electrode body, and B is a capacitance-voltage conversion circuit. *61. , a 17 (-to 4.,,,. Atsushi 9 figure only amendment 1980-11.25 - The name of the invention is amended as follows. ■The scope of the claim for raindrop sensor utility model registration is as follows. Amended 10 Utility Model Registration Claims A thin dielectric body, a plurality of first electrode bodies attached to the surface of the dielectric body, and a predetermined detection method with the first electrode body on the surface of the dielectric body. A second electrode body attached with an interval therebetween and ζ face the first electrode body sandwiching the dielectric body on the back surface of the dielectric body, and cooperate with the first electrode body to form a plurality of electrode bodies. and a third electrode body forming a capacitor, and when a raindrop conducts the detection interval between the first electric scraper and the second electrode body, the third electrode body forms a capacitor. 2 electrode body and 3rd electrode body
A raindrop sensor characterized by outputting an output as a capacitance change between an electrode body and an electrode body.

Claims (1)

[Scope of utility model registration request] A thin dielectric body disposed on the wiping surface of the wiper; a plurality of first electrode bodies attached to the surface of the dielectric body; A plurality of capacitors are connected to each other by a second electrode body attached at a certain interval, and a second electrode body which faces the first electrode body with the dielectric body sandwiched between the back surface of the dielectric body and cooperates with the first electrode body. and a third electrode body forming a third electrode body, and when a raindrop conducts the detection interval between the first electrode body and the second electrode body,
A raindrop sensor for a vehicle, characterized in that the raindrop sensor outputs this as a capacitance change between the second electrode body and the third electrode body.