Patent ID: 9215971
Filing Date: 2015-12-22
Classification: A61B,G02B

Abstract:
1. An endoscope, comprising: an insertion portion that is insertable into an observation object; a bending portion having a bendable tubular structure that is provided in the insertion portion; a holding member that is provided at a position that is further on a distal end side than the bending portion, and is used for holding an observation portion that observes the observation object; a contact portion that is positioned in a distal end side portion of the bending portion, and that contacts a proximal end side portion of the holding member as a result of the proximal end side portion of the holding member being fitted into an inside surface thereof; a wall defining a hole portion formed in the contact portion, the hole portion being provided in the distal end side portion of the bending portion; a concave portion formed in the proximal end side portion of the holding member at a position corresponding to the hole portion; and a screw member that penetrates the wall defining the hole portion by screw-fastening, a distal end side of the screw member being housed in the concave portion; wherein: a diameter in a direction perpendicular to a depth direction of the concave portion is larger than an outside diameter of the screw member, a length, in the depth direction, obtained by adding a depth of the concave portion in the depth direction and a thickness of the wall defining the hole portion in the depth direction is greater than an axial direction length of the screw member; the diameter of the concave portion is greater than a diameter of the hole portion in the direction perpendicular to the depth direction; and no portions of the screw member, after the screw-fastening, contact with portions defining the concave portion.