Liquid-medicine administration device, puncture device, liquid-medicine filling device, liquid-medicine filling method, and liquid-medicine filling system

A liquid-medicine administration device configured to be attached to a body surface of a user's living body, comprising:

• a casing possessing a surface configured to be attached to the body surface of the user's living body;
• a liquid-medicine storage portion configured to store liquid medicine;
• a puncture portion in communication with the liquid-medicine storage portion and forming a flow channel positionable in the user's living body and through which the liquid medicine flows from the liquid-medicine storage portion into the user's living body after a tip of the puncture portion moved to a position projecting beyond the surface of the casing punctures the user's living body when the surface of the casing is attached to the body surface of the user's living body;
• and
• an angle adjustment portion that adjusts a protruding angle of the tip portion of the puncture portion relative to the surface of the casing to adjust an angle at which the tip portion enters the user's living body.

A puncture device comprising:

• a hollow needle possessing both a tip portion configured to puncture a living body and an elastic portion;
• a fixing portion fixed to a part of the hollow needle so that the part of the hollow needle is a fixed part of the hollow needle, the fixed part of the hollow needle being positioned on a side of the elastic portion opposite the tip portion so that the elastic portion is located axially between the tip portion and the fixed part;
• a sheath portion covering a part of or entirety of the hollow needle from the fixed part to the tip portion, the sheath portion including a plastically deformable elongating member, one end of the sheath portion located closer to the fixing portion than the tip portion being fixed to the hollow needle without any gap between an outer periphery of the hollow needle and an inner periphery of the sheath;
• a holding portion holding the hollow needle and the sheath portion in an integrated manner, the holding portion being positioned between the tip portion of the hollow needle and the plastically deformable elongating member;
• a holding release mechanism that releases the holding of the holding portion between the hollow needle and the sheath portion after the tip portion of the hollow needle and the sheath portion are punctured into a living body by moving the holding portion in a direction causing the elastic portion to extend;
• and
• wherein the sheath portion elongates and is held in an elongated condition when the holding portion moves by the holding release mechanism, or when the holding of the hollow needle using the holding portion in an integrated manner is released, and the elastic portion contracts.