COUPLING STRUCTURE FOR ENDOSCOPE FLEXIBLE TUBE AND ANNULAR COUPLING MEMBER
First Claim
1. A coupling structure for an endoscope flexible tube and an annular coupling member, comprising:
- a joint portion that is arranged at a distal end portion of a flexible tube portion for an endoscope and has a substantially annular shape;
an annular coupling member that is provided to a bending portion arranged on a distal end side of the flexible tube portion and coupled with the joint portion;
a coupling opening portion that is provided in the annular coupling member and used to couple the joint portion with the annular coupling member; and
a protruding portion that is formed on an outer peripheral surface of the joint portion and configured to be fitted into the opening portion,wherein, when the protruding portion is fitted into the opening portion at the time of coupling that the joint portion is inserted into the annular coupling member to couple the flexible tube portion with the bending portion, the opening portion and the protruding portion form retaining means for preventing the joint portion coming off the annular coupling member.
1 Assignment
0 Petitions
Accused Products
Abstract
An insertion section of an endoscope has a flexible tube portion and a bending portion whose proximal end portion is coupled with a distal end of the flexible tube portion, a plurality of node rings are aligned in a bending tube serving as a base body portion of the bending portion, opening portions as through openings are provided in a node ring, protruding portions each having substantially the same shape as the opening portion are provided on an outer peripheral surface of a joint portion of the flexible tube portion that is inserted into the node ring, and a coupling structure according to the present invention couples the bending portion with the flexible tube portion by inserting the joint portion into the node ring and fitting the protruding portions into the opening portions.
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Citations
20 Claims
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1. A coupling structure for an endoscope flexible tube and an annular coupling member, comprising:
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a joint portion that is arranged at a distal end portion of a flexible tube portion for an endoscope and has a substantially annular shape; an annular coupling member that is provided to a bending portion arranged on a distal end side of the flexible tube portion and coupled with the joint portion; a coupling opening portion that is provided in the annular coupling member and used to couple the joint portion with the annular coupling member; and a protruding portion that is formed on an outer peripheral surface of the joint portion and configured to be fitted into the opening portion, wherein, when the protruding portion is fitted into the opening portion at the time of coupling that the joint portion is inserted into the annular coupling member to couple the flexible tube portion with the bending portion, the opening portion and the protruding portion form retaining means for preventing the joint portion coming off the annular coupling member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification