Foreign object insertion detector device

Abstract

In the foreign object insertion detector device, the light (infrared rays) is transmitted into the internal space of a tube body implanted into a weather strip and formed of elastic material and, if there occurs the insertion of a foreign object, then the foreign object produces a pressing force and applies the pressing force to the tube body to thereby deform the tube body If the tube body is deformed in this manner, then the quantity of the light transmitted through the internal space is caused to decrease. By judging whether a decrease in the quantity of the light transmitted through the internal space is present or absent, the insertion of the foreign object can be detected. In order to able to detect the pressing force given from obliquely downward directions C and D by the foreign object with high sensitivity, in the obliquely downward car exterior side or obliquely downward car exterior side of the tube body in the weather strip as pressing means there are formed cavity portions as well as projecting portions 37, 39. Thanks to this structure, the pressing force from the foreign object can be applied through the projecting portions and to the tube body collectively without being dispersed.