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CN111542355A - 支撑结构 - Google Patents

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CN111542355A
CN111542355A CN201880084707.1A CN201880084707A CN111542355A CN 111542355 A CN111542355 A CN 111542355A CN 201880084707 A CN201880084707 A CN 201880084707A CN 111542355 A CN111542355 A CN 111542355A
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support structure
plunger rod
contact
flexible element
medicament container
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CN111542355B (zh
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李文彦
陈学毅
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Astor Medical
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Abstract

本发明涉及一种用于药剂容器(18)的支撑结构(40)，该支撑结构(40)布置为容纳细长的柱塞杆(32)，所述支撑结构(40)包括至少一个柔性元件(48)，该柔性元件布置为与所述药剂容器(18)的远端表面接触地移动并在其上施加力，其中，所述至少一个柔性元件(48)设有接触构件(50)，该接触构件布置为与所述柱塞杆(32)的外表面接触，并且在与所述药剂容器(18)接触地移动时脱离与所述柱塞杆(32)的接触。

Description

支撑结构
技术领域
本申请涉及一种用于将药剂容器在药剂输送装置内保持在稳定状态的药剂容器支撑结构。
背景技术
对于其中组装有药剂容器的药剂输送装置，通常希望将药剂容器支撑为使其不会在药剂输送装置的壳体内发出异响或移动。由于药剂容器和药剂输送装置本身的公差变化，用于药剂容器的任何支撑装置优选应是柔性的，并且还可能有弹性，以应对施加在药剂输送装置上的力以及药剂容器掉落到坚硬表面上等情况。
文献WO 2011/123024公开了一种具有多种自动功能的药剂输送装置，该药剂输送装置在市场上很受欢迎。该药剂输送装置包括弧形柔性元件形式的支撑结构，该支撑结构与放置在药剂输送装置中的药剂容器的远端表面接触。这样，该支撑结构向药剂容器的近端方向施加力，以防止药剂容器移动。
在大多数情况下，这种解决方案非常有效。但是，存在所交付的药剂容器的尺寸超出药剂输送装置的设计规格的情况，并且最需要注意的是，药剂容器的筒体的内表面与药剂容器远端的凸缘的指向远侧的表面之间的过渡表面的半径测量值有变化。对于具有较大半径的成批药剂容器，存在弧形支撑结构进入其内表面与柱塞杆之间的药剂容器通道的风险，因而存在柱塞杆堵塞并且药剂输送装置由此发生故障的风险。
发明内容
本发明的目的是克服现有技术方案的缺点。
此目的是通过包括独立专利权利要求中的特征的支撑结构实现的。优选实施例构成从属权利要求的主题。
根据一个主要方面，提供了一种用于药剂容器的支撑结构，该支撑结构布置为容纳细长的柱塞杆。所述支撑结构包括至少一个柔性元件，该柔性元件布置为与药剂容器的远端表面接触地移动并在其上施加力，以减少或消除药剂容器的移动。所述至少一个柔性元件可设有接触构件，该接触构件布置为与柱塞杆的外表面接触，并且在与药剂容器接触地移动时脱离与柱塞杆的接触。
在柱塞杆设有所述支撑结构的情况下，以及在药剂容器布置为与柔性元件接触的情况下，接触构件会确保柔性元件被可靠地大致径向向外导引。因此，最大限度地减少了柔性元件在柱塞杆与药剂容器的内表面之间的任何堵塞作用的风险。
根据一个可行的方面，所述支撑结构可包括大致管状的主体，柱塞杆可置于该主体中，并且其中至少一个柔性元件布置在管状主体的一端。此外，所述至少一个柔性元件可在大致径向以及大致轴向上是柔性的。
根据一个有利的方案，所述至少一个柔性元件可包括相对于所述主体的纵向沿倾斜方向延伸的弧形结构，并且其中所述弧形结构的向内指向的表面设有向内指向的突起。在与药剂容器接触时，所述突起会确保柔性元件被可靠地向外导引。在此方面，在平行于主体的纵向的平面内能够看到，所述向内指向的突起可设有至少一个倾斜表面。在平行于支撑结构的纵轴的平面内能够看到，所述向内指向的突起更优选可具有三角形形状，该三角形形状具有倾斜表面。这确保在柱塞杆插入到支撑结构中时接触构件与柱塞杆之间的摩擦非常小。
为了进一步加强所述柔性元件，弧形结构的向外指向的表面可设有向外指向的突起。
通过阅读下文中的详细说明和附图，本申请的这些方面和其它方面以及优点将变得明显。
附图说明
下面将参照附图对本申请进行说明，在附图中：
图1是可利用本申请的方案的药剂输送装置的横截面图；
图2是包括在图1的药剂输送装置中的支撑结构的透视图；和
图3-5是图2的支撑结构的不同功能位置的横截面图。
具体实施方式
图1示出了药剂输送装置的一个示例，在其中可利用本申请的支撑结构。药剂输送装置10包括细长壳体12，该壳体12具有近端14和远端16，并沿着纵轴L延伸。壳体的内部布置为容纳药剂容器18。所示的药剂容器18设有一体的注射针20，并在其管状主体内具有可移动的塞件22。药剂容器18的远端设有径向延伸的凸缘24。外壳12的近端还设有大致管状的药剂输送构件护罩26，该护罩26可在如图所示的遮盖注射针20的伸出位置与可使用注射针20进行穿刺的缩回位置之间移动。药剂输送构件护罩26优选被药剂输送构件护罩弹簧28向近侧方向压迫。壳体12的远端设有动力单元30，该动力单元包括细长柱塞杆32，该柱塞杆32布置为在塞件22上施加作用以通过注射针20输送一剂药剂。柱塞杆32由压缩弹簧34驱动。
柱塞杆32与处于张紧状态的弹簧34一起被径向柔性臂36保持在后盖40的大致管状的主体38上，后盖40的大致管状的主体38形成支撑结构。臂36设有向内指向的突起42，该突起配装到柱塞杆32的凹部44中。在径向上布置在臂36的外侧的大致管状的旋转体46防止臂36释放柱塞杆32，该旋转体46的内表面与臂36的外表面接触。后盖40附接至壳体12的远端，其中弹簧34的远端抵接后盖40。
为了激活药剂输送装置，可将药剂输送构件护罩26向远侧方向推动。药剂输送构件护罩26的远侧部分设有能够转动旋转体46从而使其不再与臂36接触的元件。由此臂36可自由地径向向外移动，从而释放柱塞杆32以执行剂量输送程序。
后盖40还设有元件48，该元件在大致纵向上是柔性的，并且设计为在药剂容器18被插入到药剂输送装置中时向药剂容器18的远端施加力。在所示的实施例中，柔性元件48包括相对于药剂输送装置的纵轴稍稍向外倾斜的两个大致弧形的结构。
根据本应用，柔性元件48设有接触构件50，该接触构件50将要与药剂容器18的远端接触，尤其是与药剂容器18的凸缘24接触。接触构件50在所示实施例中是与柔性元件48的内表面一体形成的向内指向的突起，如图2所示。在所示的实施例中，在沿着纵轴的平面内能够看到，接触构件50具有三角形形状，由此一个表面52向近侧方向倾斜。此外，在柔性元件48上布置有向外指向的突起54，以加强弧形柔性元件48的外侧部分。
所述支撑结构的工作方式如下。如图3所示，在未将柱塞杆32引入后盖40的主体38中时，具有接触构件50的柔性元件48的倾斜度和设计使得接触构件50的最内表面之间的距离D1稍稍小于柱塞杆的外径D2。因此，如图4所示，在柱塞杆被插入到后盖中时，接触构件会与柱塞杆的外表面接触，并且柔性元件48会向外弯曲。接触构件50的三角形形状会提供与柱塞杆32的点接触，因此接触构件50与柱塞杆32之间的摩擦非常小。
现在，当带有柱塞杆32的后盖40与药剂输送装置10的壳体12内的药剂容器18组装在一起时，带有接触构件50的柔性元件48会与药剂容器18的远端表面接触，并径向弯曲，如图5所示。由于带有接触构件50的柔性元件在大致径向上的厚度T增加，因此确保向外弯曲，并且防止柔性元件48在柱塞杆32与药剂容器18的内壁之间的任何堵塞。柔性元件48的向外弯曲动作会进一步导致接触构件50移动并脱离与柱塞杆32的接触(图5)，这会确保在随后的剂量输送程序期间，当柱塞杆32被向近侧方向压迫从而作用在药剂容器18上以排出一剂药剂时，根本没有来自接触构件50的摩擦。
应理解，上文所述和附图所示的实施例应仅视为本申请的非限定性示例，并且在专利权利要求的范围之内可以修改。

Claims (8)

1.用于药剂容器(18)的支撑结构(40)，该支撑结构(40)布置为容纳细长的柱塞杆(32)，所述支撑结构(40)包括至少一个柔性元件(48)，该柔性元件布置为与所述药剂容器(18)的远端表面接触地移动并在其上施加力，其中，所述至少一个柔性元件(48)设有接触构件(50)，该接触构件布置为与所述柱塞杆(32)的外表面接触，并且在与所述药剂容器(18)接触地移动时脱离与所述柱塞杆(32)的接触。
2.如权利要求1所述的支撑结构，还包括大致管状的主体(38)，所述柱塞杆(32)可置于该主体(38)中，并且其中所述至少一个柔性元件(48)布置在所述管状主体(38)的一端。
3.如权利要求2所述的支撑结构，其中，所述至少一个柔性元件(48)在大致径向以及大致轴向上是柔性的。
4.如权利要求2-3中任一项所述的支撑结构，其中，所述至少一个柔性元件(48)包括相对于所述主体(38)的纵向(L)沿倾斜方向延伸的弧形结构，并且其中所述弧形结构(48)的向内指向的表面设有向内指向的突起(50)。
5.如权利要求4所述的支撑结构，其中，在平行于所述主体(38)的纵向(L)的平面内能够看到，所述向内指向的突起(50)设有至少一个倾斜表面(52)。
6.如权利要求4或5所述的支撑结构，其中，在平行于所述支撑结构(40)的纵轴的平面内能够看到，所述向内指向的突起(50)具有三角形形状，该三角形形状具有倾斜表面。
7.如权利要求4所述的支撑结构，其中，所述弧形结构(48)的向外指向的表面设有向外指向的突起(54)。
8.包括如前述权利要求中任一项所述的支撑结构的药剂输送装置。
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