Shielding structure of electronic endoscope apparatus

Details Shielding structure of electronic endoscope apparatus Shielding structure of electronic endoscope apparatus

1994-09-27

1996-10-29

Apley, Richard J.

Surgery

Endoscope

With camera or solid state imager

348 76, A61B 105

Patent

active

055691587

ABSTRACT:
A shielding structure of an electronic endoscope apparatus which can sufficiently remove noise even when an electric cautery is used. A signal transmission cable which connects a charge coupled device disposed at the end portion of an electronic endoscope to a processor unit is electrically shielded by a double shield composed by an inner shield and an outer shield. The inner shield is connected to the ground in a light source connector and the outer shield is connected to the frame ground of the processor unit through a capacitor. The outer shield is further connected to a shielding member provided around the charge coupled device and a patient ground to which an electrode piece of an electric cautery is connected. Noise is greatly removed, so that the picture quality is improved.

REFERENCES:
patent: 4264940 (1981-04-01), Castle
patent: 4607621 (1986-08-01), Wheeler
patent: 4677471 (1987-06-01), Takamura et al.
patent: 4759346 (1988-07-01), Nakajima
patent: 4974075 (1990-11-01), Nakajima
patent: 5136250 (1992-08-01), Abdelli
patent: 5274712 (1993-12-01), Lindsay et al.

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