Endoscope and operation section for endoscope

1 . An endoscope, comprising:

an insertion section including a distal end and a proximal end, the insertion section configured for insertion into a subject; and

an operation section main body connected to the proximal end of the insertion section, the operation section main body configured to be grasped by a user,

wherein the operation section main body includes an operation knob and a switch button,

wherein the operation knob is rotatable about a center axis relative to the operation section main body to move the distal end of the insertion section,

wherein the switch button is translatable in a translating direction relative to the operation section main body, and

wherein, in a view in a longitudinal direction of the operation section main body, the center axis is configured to be tilted with respect to a direction that is perpendicular to each of the longitudinal direction of the operation section main body and the translating direction of the switch button.

2 . The endoscope according to claim 1 , wherein the center axis of the operation knob is configured to be tilted such that the operation knob is tilted toward a side of the operation section main body where the switch button is located.

3 . The endoscope according to claim 2 , wherein the operation knob is configured to be tilted to form an acute angle that is not less than 1 degree and is not more than 30 degrees.

4 . The endoscope according to claim 3 , wherein the acute angle is not less than 5 degrees and is less than 10 degrees.

5 . The endoscope according to claim 1 , wherein the operation knob includes a first operation knob and a second operation knob, the first operation knob and the second operation knob are arranged along the center axis of the operation knob with the first operation knob closer to the operation section main body than the second operation knob,

wherein an imaginary line that passes through an end surface of the switch button and that is parallel to the translating direction of the switch button defines a first line, and

wherein, in the view in the longitudinal direction of the operation section main body, a shortest distance between the first line and an end surface of the first operation knob is longer on a first side of the center axis of the operation knob where the switch button is not provided than on a second side of the center axis of the operation knob where the switch button is provided.

6 . The endoscope according to claim 1 , wherein, in a view in a direction that is perpendicular to each of the longitudinal direction of the operation section main body and the translating direction of the switch button, the center axis of the operation knob is configured to be tilted toward a location on the operation section main body where the insertion section is connected.

7 . The endoscope according to claim 1 , wherein, in a view in the longitudinal direction of the operation section main body, an end surface of the switch button includes a tapered surface that is inclined with respect to the translating direction of the switch button.

8 . The endoscope according to claim 1 , wherein the insertion section includes a bending section connecting a distal end section to a flexible tube section,

wherein the bending section that is configured to bend in a direction that intersects the longitudinal direction of the operation section main body,

wherein the operation section main body further includes a pulley around which a wire is wound, and

wherein a rotation shaft of the pulley is parallel to or coaxial with the center axis of the operation knob.

9 . The endoscope according to claim 8 , further comprising a wire tension mechanism configured to apply a predetermined tension to the wire.

10 . The endoscope according to claim 1 , wherein the insertion section includes a bending section connecting a distal end section to a flexible tube section,

wherein the bending section that is configured to bend in a direction that intersects the longitudinal direction of the operation section main body,

wherein the operation section main body further includes a pulley around which a wire is wound,

wherein a rotation shaft of the pulley is parallel to a direction perpendicular to each of the longitudinal direction of the operation section main body and the translating direction of the switch button,

wherein a shaft member is located along the center axis of the operation knob,

wherein a universal joint is provided between the shaft member and the pulley, and

wherein the universal joint is configured to transmit a force from rotation of the operation knob to the pulley.

11 . The endoscope according to claim 1 , wherein the operation knob includes a first operation knob and a second operation knob, the first operation knob and the second operation knob are arranged along the center axis of the operation knob with the first operation knob closer to the operation section main body than the second operation knob,

wherein the insertion section includes a bending section connecting a distal end section to a flexible tube section,

wherein the bending section that is configured to bend in a direction that intersects the longitudinal direction of the operation section main body,

wherein the operation section main body further includes a plurality of pulleys and around each pulley of the plurality of pulleys a wire is wound,

wherein a first pulley of the plurality of pulleys is connected to the first operation knob and a second pulley of the plurality of pulleys is connected to the second operation knob,

wherein the first operation knob is configured such that rotation of the first operation knob bends the bending section in a first direction, and

wherein the second operation knob is configured such that rotation of the second operation knob bends the bending section in a second direction, the second direction different from the first direction.

12 . The endoscope according to claim 1 , wherein the endoscope is a single-use endoscope.

13 . The endoscope according to claim 1 , further comprising an angle fixing mechanism configured to fix the operation knob at a predetermined angle.

14 . The endoscope according to claim 1 , further comprising a sleeve member disposed a space between the operation section main body and the operation knob.

15 . The endoscope according to claim 1 , wherein the operation knob includes a protruding portion protruding along the center axis of the operation knob.

16 . The endoscope according to claim 1 , further comprising a lever provided between the operation knob and the operation section main body, the lever configured to operate the insertion section.

17 . The endoscope according to claim 1 , wherein the operation section main body further includes a pulley around which a wire is wound, and

wherein the center axis of the operation knob is configured to be tilted with respect to a center axis of the pulley.

18 . The endoscope according to claim 1 , wherein the center axis of the operation knob is configured to be changed a tilted angle between a first angle and a second angle with respect to at least one of the longitudinal direction of the operation section main body and the translating direction of the switch button.

19 . An operation section for an endoscope, comprising:

an operation section main body configured to be grasped by a user,

wherein the operation section main body includes an operation knob and a switch button,

wherein the operation knob is rotatable about a center axis relative to the operation section main body,

wherein the switch button is translatable in a translating direction relative to the operation section main body, and

wherein, in a view in a longitudinal direction of the operation section main body, the center axis is configured to be tilted with respect to a direction that is perpendicular to each of the longitudinal direction of the operation section main body and the translating direction of the switch button.

20 . The operation section according to claim 19 , further comprising:

a connection member configured to connect a distal end of the operation section main body to a proximal end of an insertion section having a distal end configured for insertion into a subject,

wherein the operation knob is configured such that rotation of the operation knob about the center axis moves the distal end of the insertion section, and

wherein the switch button is configured such that translation of the switch button in the translating direction executes an operation of the endoscope.