Patent ID: 11938305
Assignee: TERUMO KABUSHIKI KAISHA
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 17:
18. A manufacturing method for a syringe assembly, comprising:
preparing a syringe that includes a distal nozzle portion having an engagement projected portion provided on an outer peripheral surface and a distal opening;
preparing a plate-shaped seal member having elasticity;
preparing a cover member that is made of a harder material than the seal member and includes: a base portion provided at a distal end; and a tubular mounting portion extending from the base portion in a proximal direction along an axis of a cap, the base portion having a holding portion that holds the seal member and a through-hole that communicates with the holding portion and exposes a distal surface of the seal member, the mounting portion having two claw portions that are arranged at positions separated from the holding portion in the proximal direction, protrude inward from an inner peripheral surface of the mounting portion, and oppose each other;
inserting the distal nozzle portion into the mounting portion of the cover member in which the seal member is held in the holding portion; and
pushing the distal nozzle portion into the mounting portion until the engaging projected portion passes over the two claw portions toward the distal direction to seal the distal opening of the distal nozzle portion with the seal member, and mounting the cap on the distal nozzle portion, wherein
the mounting portion includes: two first reinforcing portions arranged on both sides of one of the two claw portions in a circumferential direction of the mounting portion; two second reinforcing portions arranged on both sides of another of the two claw portions in the circumferential direction of the mounting portion; two first deformation promoting portions which are arranged respectively between the two first reinforcing portions and between the two second reinforcing portions and oppose each other; and two second deformation promoting portions which are arranged between each of the two first reinforcing portions and each of the two second reinforcing portions and oppose each other, and
when the engagement projected portion passes over the two claw portions, the two first deformation promoting portions are deformed radially outward, and the two second deformation promoting portions are deformed radially inward so as to make a distance between the two claw portions substantially equal to an outer diameter of the engagement projected portion.