Syringe assembly, cap, and puncture needle

A syringe assembly comprising:

• a barrel comprising:
• a cylindrical barrel body that includes an opening at a proximal end thereof, and
• a barrel tip portion that is disposed at a distal end of the barrel body;
• a puncture needle that includes an edge surface and a needle hole, and being held by the barrel tip portion so as to project from the barrel tip portion;
• and
• a cap that is detachably mountable to the barrel so as to seal a distal end of the needle hole;
• wherein the cap includes:
• a receiving hole configured to receive the puncture needle,
• a bottom wall portion that is disposed adjacent to a distal end side of the receiving hole and into which the puncture needle is insertable, wherein the bottom wall portion has a Shore D hardness in range of 35 to 55, and
• a stopper portion that defines an insertion length of the puncture needle relative to the bottom wall portion by abutting against the barrel;
• wherein, in a state in which the cap is mounted to the barrel, a length from a most proximal position of a contact region between the cap and the puncture needle to a most proximal position of the edge surface is in a range of 1 to 3 mm;
• and
• wherein the puncture needle comprises:
• a first lubricant-covered region at which an outer surface of the puncture needle is covered by a lubricant, the first lubricant-covered region extending from a most distal position of the puncture needle to a position in a range of 1 to 3 mm from the most proximal position of the edge surface,
• a second lubricant-covered region at which the outer surface of the puncture needle is covered by the lubricant, the second lubricant-covered region being adjacent to a proximal end of the first lubricant-covered region, and
• a non-lubricant-covered region at which the outer surface of the puncture needle is not covered by the lubricant, the non-lubricant-covered region being adjacent to a proximal end of the second lubricant-covered region,
• wherein a thickness of the lubricant in the first lubricant-covered region is lower than a thickness of the lubricant in the second lubricant-covered region.