Patent ID: 8746061
Filing Date: 2014-06-10
Classification: G01F,H01C

Abstract:
1. A liquid level detecting apparatus, comprising a resistance plate that has a plurality of conductive segments provided on an insulating substrate, and a resistor electrically connected with the plurality of conductive segments; and a sliding body that includes a contact that contacts different ones of the plurality of conductive segments in response to the sliding body sliding in accordance with change of a level of a liquid surface, wherein the plurality of conductive segments are provided on the insulating substrate at approximately equal intervals, wherein the contact of the sliding body has a flat and round shaped top portion which contacts with the conductive segments and comes into surface contact with top portions of the plurality of conductive segments when the contact slides on the plurality of conductive segments, wherein a diameter a of the flat and round shape top portion of the contact satisfies 0.5<α [mm]<0.6, when the width W of the conductive segment is 200 [μm], and an interval D of neighboring conductive segments is 200 [μm], wherein the flat and round shaped top portion of the contact of the sliding body includes: