Patent ID: 8882659
Filing Date: 2014-11-11
Classification: A61B

Abstract:
1. An endoscopic device comprising: an endoscope which includes an insertion section including a distal end portion, a proximal end portion, and an outer peripheral portion and having a longitudinal axis extended from the distal end portion to the proximal end portion; a cylindrical fixed member which includes a distal end portion, a proximal end portion, an outer peripheral portion, and an inner peripheral portion, and which is fixed to the insertion section in a state that the proximal end portion thereof contacts with the distal end portion of the insertion section; a proximal side contact portion which is provided on the inner peripheral portion of the proximal end portion of the fixed member, and which comes into air-tight contact with the outer peripheral portion of the distal end portion of the insertion section; a cavity defining portion which is formed by the outer peripheral portion of the insertion section and the inner peripheral portion of the distal end portion of the fixed member, and which defines a cavity between the outer peripheral portion of the insertion section and the inner peripheral portion of the distal end portion of the fixed member to a distal direction side of the proximal side contact portion; a cylindrical hood which is movable along the longitudinal axis with respect to the fixed member between a housed state where the hood is housed in the cavity and a protruding state where the hood is protruding toward the distal direction side from the distal end portion of the fixed member; a distal side contact portion which is provided on the inner peripheral portion of the fixed member, and with which the outer peripheral portion of the hood is in air-tight and liquid-tight contact over an entire circumference in circumferential directions in the protruding state of the hood; a first path defining portion which is formed by the inner peripheral portion of the hood and the outer peripheral portion of the insertion section, and which defines a first path configured to make an inside of the hood communicate with the cavity in the protruding state of the hood; and a second path defining portion which is formed by the inner peripheral portion of the fixed member and the outer peripheral portion of the hood, and which defines a second path configured to make the cavity to communicate with an outside of the fixed member in the housed state of the hood.