Puncturing instrument

摘要

A puncturing instrument includes a cylindrical main body case having a puncture aperture on a lower end side; a needle holder provided on a puncture aperture side inside the cylindrical main body case; a first elastic object for moving the needle holder to the puncture aperture side; and a second elastic object for pulling the needle holder back to an upper end side inside the cylindrical main body case, from a state in which the needle holder is moved to the puncture aperture side by the first elastic object. A rotator rotates around a rotation shaft fixed to the cylindrical main body case, and is coupled with a coupling portion of the needle holder on a first one of two sides of the rotator with the rotation shaft interposed therebetween and is coupled with the second elastic object on a second one of the two sides of the rotator.

主权项

1. A puncture instrument comprising: a cylindrical main body case having a puncture aperture on a lower end side of the cylindrical main body case; a needle holder provided on a puncture aperture side inside the cylindrical main body case, the needle holder having a coupling portion; a first elastic object for moving the needle holder to the puncture aperture side; and a second elastic object for pulling the needle holder back to an upper end side of the cylindrical main body case, from a state in which the needle holder is moved to the puncture aperture side by the first elastic object, wherein a rotator is configured to rotate around a rotation shaft fixed to the cylindrical main body case and is provided above a needle holding portion of the needle holder inside the cylindrical main body case, and wherein the rotator is coupled with the coupling portion on a first one of two sides of the rotator with the rotation shaft interposed therebetween and is coupled with the second elastic object on a second one of the two sides of the rotator, and wherein a protrusion is formed on the coupling portion and a hole is formed in the rotator, and the protrusion is configured to fit into the hole so as to couple the rotator with the coupling portion.