Auto-injector device
    34.
    发明授权

    公开(公告)号:US11752264B2

    公开(公告)日:2023-09-12

    申请号:US17099707

    申请日:2020-11-16

    IPC分类号: A61M5/20 A61M5/142

    摘要: An auto-injector device comprises a stopper for expelling a medicament out of a medicament reservoir; a driving element which has a first configuration and a second configuration and is configured to change shape from the first configuration to the second configuration when the temperature of the driving element is raised above a shape change temperature, so as to drive the stopper of the syringe mechanism through the medicament reservoir; and a heating mechanism configured to actively heat the driving element. The heating mechanism is a chemical heating element configured to generate heat through an exothermic process or comprises a fluid reservoir for retaining a fluid; a heater configured to heat the fluid in the fluid reservoir; a pump configured to expel the fluid out of the fluid reservoir; and a connecting conduit arranged to carry the fluid from the fluid reservoir to the driving element.