Endoscope system having reduced noise emission/permeation

Claim 1

An electronic endoscope system comprising: an electronic endoscope including: an intubation unit intubatable into a body cavity; an image forming optical system, provided at a tip of said intubation unit, for forming an optical image; a solid-state imaging element for photoelectrically converting the optical image based on said image forming optical system; an illumination light from the tip of said intubation unit; and a first connector portion, having one end connected to said solid-state imaging element, through which a plurality of signal lines are inserted; a patient circuit drive signal generating means for applying a drive signal to said solid-state imaging element through a second connector portion to which said first connector portion is detachably connected; and an amplifier circuit for amplifying at least an image signal outputted from said solid-state imaging element upon applying the drive signal; a secondary circuit including a video signal processing circuit, having its ground conductive to the earth, for generating a standard video signal from the image signal transmitted via said amplifier circuit; an isolation means for isolating said patient circuit from said secondary circuit; a monitor means for displaying the standard video signal; and a noise reducing means, provided in at least one of said electronic endoscope, said patient circuit and said secondary circuit for reducing radiation/permeation of noises, wherein at least one of said first connector portion and said second connector portion includes at least one shield gasket member formed of flexible and deformable conductive material and molded in a spring-like configuration for decreasing a contact resistance to a metal frame body of said second connector portion.