PROBLEM TO BE SOLVED: To prevent fixation between a small diameter rod body and a large diameter rod body, in a joint structure between the small diameter rod body and the large diameter rod body.SOLUTION: An article concerning one embodiment of the present invention includes a small diameter rod body, and a large diameter rod body capable of receiving the small diameter rod body in the inside thereof. This small diameter rod body has a first main body of a slim shape, a first large diameter part, and a second large diameter part. In one embodiment of the invention, the large diameter rod body has a second main body of the slim shape, and a small diameter part formed in the tip of the second main body and having an inner diameter smaller than the inner diameter of the second main body. The large diameter rod body has a first protrusion coming in abutment with an outer circumferential surface of the first large diameter part when the small diameter rod body is in a joint position, and a second protrusion coming in abutment with the outer circumferential surface of the second large diameter part when the small diameter rod body is in the joint position. The small diameter part is constituted so that the base end is brought into abutment with the tip of the first large diameter part when the small diameter rod body is in the joint position.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】 小径竿体と大径竿体との継合構造において、当該小径竿体と当該大径竿体との固着を抑制する。【解決手段】 本発明の一実施形態に係る物品は、小径竿体と、前記小径竿体をその内部に収容可能な大径竿体と、を備える。この小径竿体は、細長い形状の第1の本体と、第1の大径部と、第2の大径部と、を有する。本発明の一実施形態において、当該大径竿体は、細長い形状の第2の本体と、前記第2の本体の先端に形成された前記第2の本体の内径よりも小さな内径を有する小径部と、を有する。当該大径竿体は、前記小径竿体が継合位置にあるときに前記第1の大径部の外周面と当接する第1の突起と、前記小径竿体が前記継合位置にあるときに前記第2の大径部の外周面と当接する第2の突起と、を有する。前記小径部は、前記小径竿体が継合位置にあるときに、その基端が前記第1の大径部の先端に当接するように構成される。【選択図】 図2
