The endoscope of the present invention, in which the flexibility of a part of a signal wire inserted through the insertable part is varied, is provided with a flexible insertable part to be inserted into a body cavity. A solid state imaging device obtains an optical image of an observed part through...http://www.google.co.uk/patents/US4919114?utm_source=gb-gplus-sharePatent US4919114 - Endoscope provided with flexible signal wires
