公开(公告)号：US20220072232A1

公开(公告)日：2022-03-10

申请号：US17418552

申请日：2019-12-27

Applicant: DAICEL CORPORATION

Inventor： Takamasa SUZUKI ,  Takashi HASEGAWA ,  Shingo ATOBE ,  Yuzo YAMAMOTO ,  Hiromitsu IGA

IPC: A61M5/30

Abstract: A needleless injector according to the present disclosure includes a housing part including an accommodating space in which an intended injection substance is accommodated. The housing part includes: a housing part main body incorporating the accommodating space; a protrusion including a distal end surface in which an ejection port is formed, the protrusion having an outer diameter that is smaller than an outer diameter of the housing part main body, the distal end surface having an outer circumference edge represented by an intersection point between a first straight line and a second straight line; and a connection part connecting the protrusion and the housing part main body to each other, and having an outer surface forming an annular inclined surface that is inclined with respect to a center axis of the housing part.