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    • 1. 发明申请
    • AN INJECTION NEEDLE ASSEMBLY FOR AN INJECTION DEVICE AND AN INJECTION DEVICE COMPRISING SUCH ASSEMBLY
    • 注射装置的注射针组件和包括这种装配的注射装置
    • WO2016116614A1
    • 2016-07-28
    • PCT/EP2016/051369
    • 2016-01-22
    • NOVO NORDISK A/S
    • BENITO, Modesto Javier MoraHANSEN, Søren KjellerupTHOMSEN, Helle RavnTRUE, Daniel Patrick Godskesen
    • A61M5/20A61M5/32
    • A61M5/3202A61M5/20A61M5/2033A61M5/3204A61M5/326A61M5/3286A61M2005/2013A61M2005/206A61M2005/3247A61M2005/3258A61M2205/583
    • An injection needle assembly (50) for an injection device, comprising: a) a needle cannula (3) attached to a needle hub (4) and defining a pointed tip at a free end (3a, 3b), and b) a needle cover (10, 10a, 10b) forming an axially extending elongated flexible enclosure accommodating the needle cannula (3). The needle cover (10, 10a, 10b) is configured to axially collapse and become penetrated by the needle cannula (3) when a penetration force is applied to the needle cover. The needle cover (10, 10a, 10b) defines a shaft section (11a) and a bulb section (11b). The shaft section (11a) encircles the needle cannula (3) and extends axially from the needle hub (4) to the bulb section (11b). The shaft section (11a) comprises a collapsible wall area (15) having wall thickness t 1 less than a predefined wall thickness t 1 ,lim to provide radial deformability for abutting contact with the needle cannula (3). The bulb section (11b) comprises a wall area (17a, 17b) having a wall thickness t 2 being greater than said predefined wall thickness t 1 ,lim , and further defines a central end wall area (20) having a wall thickness t 3 smaller than the wall thickness t 2 . In an initial non-penetrated state, the needle cover (10, 10a, 10b) assumes a first configuration wherein the wall areas of the bulb section (11b) and the wall areas of the shaft section (11a) are spaced apart from the needle cannula (3).
    • 1.一种用于注射装置的注射针组件(50),包括:a)附接到针座(4)并且在自由端(3a,3b)处限定尖端的针管(3),以及b)针 盖(10,10a,10b)形成容纳针插管(3)的轴向延伸的细长柔性外壳。 针盖(10,10a,10b)被构造成当穿刺力施加到针罩时轴向塌缩并被针套(3)穿透。 针盖(10,10a,10b)限定轴部(11a)和灯泡部(11b)。 轴部分(11a)围绕针管(3)并且从针座(4)轴向延伸到灯泡部分(11b)。 轴部(11a)包括具有小于预定壁厚t1的壁厚t1的可折叠壁区域(15),以提供用于与针插管(3)抵接的径向可变形性。 灯泡部分(11b)包括具有大于所述预定壁厚度t1的壁厚度t2的壁区域(17a,17b),并且还限定具有小于所述预定壁厚度t1的壁厚度t3的中心端壁区域(20) 壁厚t2。 在初始未穿透状态下,针罩(10,10a,10b)呈现第一构型,其中,灯泡部分(11b)的壁面和轴部分(11a)的壁面与针 套管(3)。