INSERTION APPARATUS
An insertion portion, a bending portion, a joystick, a pulling wire, a pulley, a C-shaped ring, and an end portion of a cutout portion that is provided at the C-shaped ring, and removes wear debris that is scraped from the pulley with contact of the C-shaped ring to the pulley from the pulley are provided.
1 . An insertion apparatus, comprising:
an insertion portion that is inserted into a subject;
an action portion that is provided at the insertion portion and capable of acting;
an operation member for performing an input operation that causes the action portion to act;
a pulling member that has a distal end fixed to the action portion, and is pulled with the input operation of the operation member;
a drive force generating member that is formed into a columnar shape and rotates;
a drive force assisting member that has an inner circumferential face that is contactable to an outer periphery of the drive force generating member, has the pulling member wound around an outer periphery, and is reduced in diameter with pulling of the pulling member; and
a removal portion that is provided at any one member having a higher modulus of elasticity out of the outer periphery of the drive force generating member and an inner periphery of the drive force assisting member, and removes wear debris that is scraped from the other member having a low modulus of elasticity with contact of the drive force assisting member to the drive force generating member from the other member.
2 . The insertion apparatus according to claim 1 ,
wherein the removal portion is formed into a blade shape having an inclined surface or formed into a concave shape at a position facing the other member having the low modulus of elasticity, in the one member having the higher modulus of elasticity.
3 . The insertion apparatus according to claim 1 ,
wherein the other member having the low modulus of elasticity comprises an inner layer portion, and an outer layer portion that is provided on an outer side of the inner layer portion and contacts the one member, and
the outer layer portion is configured by a material having a lower modulus of elasticity than the inner layer portion.
4 . The insertion apparatus according to claim 1 ,
wherein a proximal end of the pulling member is connected to the operation member, the drive force generating member is a pulley that rotates in one direction, and the drive force assisting member is a C-shaped ring that is partially cut out.
5 . The insertion apparatus according to claim 4 ,
wherein the C-shaped ring is configured by a material having a higher modulus of elasticity than the pulley, and
a cutout portion of the C-shaped ring configures the removal portion.
6 . The insertion apparatus according to claim 4 ,
wherein the pulley is configured by a material having a higher modulus of elasticity than the C-shaped ring, and
a concave portion that is formed in the outer periphery of the pulley configures the removal portion.
7 . The insertion apparatus according to claim 1 ,
wherein the drive force generating member is a pulley that rotates in one direction, and the drive force assisting member is configured by a pressing member rotatable by the input operation of the operation member, and a pressed member that has an intermediate position of the pulling member locked thereto, and contacts the pulley with a frictional force by pressing by rotation of the pressing member.
8 . The insertion apparatus according to claim 7 ,
wherein the pressed member is configured by a material with a higher modulus of elasticity than the pulley, and
the pressed member is provided with the removal portion.
9 . The insertion apparatus according to claim 7 ,
wherein the pulley is configured by a material having a higher modulus of elasticity than the pressed member, and
a concave portion that is formed in the pulley configures the removal portion.
10 . The insertion apparatus according to claim 1 ,
wherein the drive force generating member is a friction plate that rotates in one direction, and the drive force assisting member is a pulley that contacts the friction plate with a frictional force by the input operation of the operation member.
11 . The insertion apparatus according to claim 10 ,
wherein the pulley is configured by a material with a higher modulus of elasticity than a modulus of elasticity of the friction plate, and
a groove in a concave shape that is formed in a surface that contacts the friction plate in the pulley configures the removal portion.
12 . The insertion apparatus according to claim 10 ,
wherein the friction plate is configured by a material with a higher modulus of elasticity than a modulus of elasticity of the pulley, and
a groove in a concave shape that is formed in a surface that contacts the pulley in the friction plate configures the removal portion.