Bending tube and medical instrument

摘要

Included are a bending tube; slits; wire guides; an outer coat member; and hole portions that are formed between particular slits in a distal end region that is forward from a central region on an outer circumference of a cylindrical member, each of the hole portions being communicated with any one of the slits, the wire guides covered by the outer coat member being respectively fixed to the hole portions while being attached to the cylindrical member from an outside thereof.

主权项

1. A bending tube comprising:
a cylindrical member that forms a bending portion that is provided on a distal end side in an insertion direction of an insertion portion to be inserted into a subject; a plurality of slits that are each formed into a partial arc-like shape along an outer circumference of the cylindrical member so as to be communicated with an inside of the cylindrical member, the slits having a set interval therebetween in the insertion direction, the set interval in a central region in the insertion direction being longer than the set interval in a distal end region that is located forward in the insertion direction from the central region on the outer circumference of the cylindrical member; wire guides each including an arc portion and a semicircular protruding portion, the wire guides holding a wire by means of the respective semicircular protruding portions through which the wire is inserted, the wire being inserted through the cylindrical member, being fixed to a distal end in the insertion direction of the cylindrical member, and serving to bend the bending portion; and hole portions that are formed at least between particular slits of the slits in the distal end region that are located forward from the central region on the outer circumference of the cylindrical member, each of the hole portions being communicated with only one of the slits that sandwich the hole portion in the insertion direction, the wire guides covered by an outer coat member being respectively fixed to the hole portions while being attached from an outside in a radial direction of the cylindrical member with the respective arc portions abutting against an outer circumference surface of the cylindrical member.