| 主权项 |
1. An endoscope for use with a subject, the endoscope comprising:
an insertion section capable of being inserted into the subject, the insertion section including: (i) a first bending portion configured to bend in an upward direction and a downward direction, and (ii) a second bending portion provided on a proximal end side of the first bending portion and configured to bend in the upward direction and the downward direction and in a right direction and a left direction along a circumferential direction of the upward direction and the downward direction; an upward direction side traction member that passes inside the second bending portion and is fixed to the first bending portion and which is configured to bend the first bending portion in the upward direction; a first distal end side traction member fixed to a position at a side of the upward direction of the second bending portion, the first distal end side traction member being separated from the upward direction side traction member toward the right direction, the first distal end side traction member passing inside the insertion section, and the first distal end side traction member pulling the second bending portion so as to generate a traction force in a direction between the upward direction and the right direction; a second distal end side traction member fixed to a position at a side of the upward direction of the second bending portion, the second distal end side traction member being separated from the upward direction side traction member toward the left direction, the second distal end side traction member passing inside the insertion section, and the second distal end side traction member pulling the second bending portion so as to generate a traction force in a direction between the upward direction and the left direction; a first support portion operatively coupling the upward direction side traction member to the first distal end side traction member and the second distal end side traction member, the first support portion pulling the first distal end side traction member and the second distal end side traction member when the upward direction side traction member is pulled: a downward direction side traction member that passes inside the second bending portion and is fixed to the first bending portion, the downward direction side traction member being configured to bend the first bending portion in the downward direction; a third distal end side traction member fixed to a position at a side of the downward direction of the second bending portion, the third distal end side traction member being separated from the downward direction side traction member toward the right direction, the third distal end side traction member passing inside the insertion section, and the third distal end side traction member pulling the second bending portion on as to generate a traction force in a direction between the downward direction and the right direction; a fourth distal end side traction member fixed to a position at a side of the downward direction of the second bending portion, the fourth distal end side traction member being separated from the downward direction side traction member towards the left direction, the fourth distal end side traction member passing inside the insertion section, and the fourth distal end side traction member pulling the second bending portion so as to generate a traction force in a direction between the downward direction and the left direction; and a second support portion operatively coupling the downward direction side traction member to the third distal end side traction member and the fourth distal end side traction member, the second support portion pulling the third distal end side traction member and the fourth distal end side traction member when the downward direction side traction member is pulled. |
