(57) The present invention is a puncture apparatus with an automatic puncture function,
that includes: an automatic puncture unit and an unintentional operation preventive
member, wherein the automatic puncture unit comprises: a hollow needle tube; a flexible
sheath having the needle tube inserted therethrough; a main body having one of the
ends of the sheath fixed thereto; a slider attached to the main body, the slider being
capable of sliding in an axial direction relative to the main body; a needle tube-maneuvering
section, attached to the slider, capable of sliding in an axial direction relative
to the slider, the needle tube-maneuvering section having an end section of the needle
tube fixed thereto; a retraction state-maintaining member for maintaining the needle
tube-maneuvering section in the retracted state toward a proximal end; an urging member,
provided in the needle tube-maneuvering section, for urging a retracted state of the
needle tube-maneuvering section toward the distal end; an operation section for resetting
the operation of the retraction state-maintaining member; releasing the ejection force;
and projecting the needle tube-maneuvering section toward the distal end; the needle
tube-maneuvering section is provided to the slider for holding the operation section
in an non-operating state and wherein the ejection force is released when the rear
end of the slider is destroyed by applying a specific load or greater to the automatic
puncture unit.
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