| 摘要 |
<p>A suction device comprises a suction changeover valve (11) provided to a control section of an endoscope and including a cylinder (13) with an opening at one end and a closed wall at the other end, and a piston (23) held in the cylinder in a state movable therethrough and removable through the opening of the cylinder, a first suction tube section (9) formed in the insertion section in a state communicable with the cylinder through the closed wall; and a second tube section (10) formed in a cord of the endoscope in a state communicable with the cylinder through the closed wall. An urging member (27) is projectively provided to the control section, shaped like a cup to cover the opening of the cylinder, and engaged with one end of the piston to elastically hold the piston in the first position.</p> |
