CN102089023B - 具有磁性注射完成指示器和针护套移除装置的注射装置 - Google Patents

具有磁性注射完成指示器和针护套移除装置的注射装置 Download PDF

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CN102089023B
CN102089023B CN2009801185197A CN200980118519A CN102089023B CN 102089023 B CN102089023 B CN 102089023B CN 2009801185197 A CN2009801185197 A CN 2009801185197A CN 200980118519 A CN200980118519 A CN 200980118519A CN 102089023 B CN102089023 B CN 102089023B
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罗伯特·迈克尔·欧仁克罗夫特
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Abstract

一种自动注射器设置有磁操作的“注射完成”指示器。与驱动活塞(38)相关联的能够移动的磁体(44)由软铁保持器(46)保持在凹陷的一端,直到驱动活塞到达其正常位置为止,在正常位置处能够移动的磁体(44)被吸引以撞击壳体上的磁体(48),以产生听得见的喀哒声。还描述的是弹簧指状夹(52),其在注射器罩(50)的后缘后面滑动,用于临时将所述罩的端部保持为适当离开壳体到可以抓紧它用于去除的程度。

Description

具有磁性注射完成指示器和针护套移除装置的注射装置
技术领域
本发明涉及注射装置,且特别地但不是排他地涉及包括壳体的可再次使用的自动注射器装置,一次性的注射器可以插入到壳体中以实现注射,随后为了下一次注射根据需要被拆除和更换。
背景技术
当注射完成时,需要自动注射器向用户发信号。大多数具有可视的指示,但有时注射位置看不到或将需要一定的变形才能看到,例如在臀部或上臂。因此,期望具有能够听得见的或能够触知的‘注射完成’信号。术语‘注射完成’用来表示已经实现满意的给药的情形。
发明内容
在一个方面中,本发明提供了一种注射装置,包括壳体、设置在所述壳体内的注射器和用于产生注射完成指示的磁操作指示器。在上述实施例中,磁操作装置的使用意味着用于产生所述指示所要求的至少一些能量来自于磁引力(或排斥力),从而意味着从主注射弹簧转移很少的能量或不转移能量。
在另一个方面中,本发明提供了一种注射装置,包括:
注射器,设置在壳体内;
驱动元件,能够从第一位置移动至第二位置,以从所述注射器排出剂量;
磁操作指示器,用于指示注射完成;
所述指示器包括两个协作元件,分别地,其中一个协作元件与所述驱动元件相关联,而一个协作元件与所述壳体相关联,且所述指示器被布置成使得在所述驱动元件到达或靠近所述第二位置时,所述协作元件的相对位置被作用在其间的磁力的作用而改变。
如上所述,注射完成指示是被磁性产生的。所述指示是由两个协作元件的位置变化产生的。
诸多不同的磁配置是可行的。在一种布置中,所述协作元件中的一个包括捕获式元件且另一个包括能够相对移动的元件。因此,所述捕获式元件可以与所述壳体相关联,且所述能够相对移动的元件可以与驱动元件相关联。虽然这不是必须的,但优选的是两个所述协作元件被磁化。
在一种优选的布置中,驱动元件具有与它相关联的铁磁保持器元件,铁磁保持器元件适合于临时限制所述能够移动的磁性元件,直到它在由于所述捕获式磁性元件的靠近而在磁力的作用下而被移动为止。以这种方式,小的约束力施加至能够移动的磁性元件,直到它足够靠近捕获式元件,以由磁力拉动离开保持器。
注射完成指示可以采用许多形式,例如,它可以包括能听得见的指示、可视的指示或能触知的指示中的一种或更多种。当指示器提供能听得见的指示时,该能听得见的指示可能由于能够移动的磁性元件和捕获式磁性元件(或与其相关联的表面)之间撞击而被产生。在这种布置中,驱动元件可以具有与之相关联的凹陷,该凹陷用于容纳能够相对移动的磁性元件并允许所述能够移动的元件由于与所述固定的磁性元件的相互磁作用而大致横向移动。凹陷可以横向延伸,且在其一端处具有保持器元件,当驱动元件处于其第二位置时凹陷的另一端面向固定的协作元件。凹陷可以设置在鼓中,该鼓形成驱动组件的一部分且通过弹簧作用到鼓上。
虽然在许多实施例中,驱动元件将线性移动,以从注射器排出剂量,但本发明延及其中驱动构件的移动是非线性的(例如是可旋转的)的布置。
在许多自动注射器装置中,具有覆盖其针的护套的注射器装载在该装置中,且在操作之前必须去除护套。一些现有的自动注射器装置的特点在于,如果注射器已经插入装置中,由于仅护套的很短的一部分突出,则覆盖针的护套难以去除。由于这一问题,用户可以决定在将注射器插入自动注射器中之前去除护套,这增加了意外针刺受伤的风险。对于给定长度的护套,如果该装置被设计为使得护套更大的部分是可接近的,这将意味着露出的针尖将突出超过壳体,这又将导致潜在的针刺受伤。
因此,在本发明的另一个方面中,提供了一种注射装置,包括:
壳体,具有前端;
注射器,在其前端具有针,并设置在所述壳体内用于纵向移动;
可拆卸的针护套,用于在使用之前覆盖所述针;
所述注射器在注射之前能够克服弹簧偏压向前移动,以使得所述针护套移动至伸展位置,在所述伸展位置,所述护套的前部从所述壳体突出,以允许它被抓紧并从所述针拆除,和
锁定装置,用于可释放地锁定所述注射器和护套中的至少一个,使得所述护套被保持在其伸展位置。
在这种布置中,注射器可以克服弹簧偏压向前移动,使得锁定装置保持注射器和/或护套,使得护套有足够的部分露出,以允许它被抓紧和去除。
优选的是,护套具有向后的面向表面,并且所述锁定装置在所述向后的面向表面的后面锁定。这意味着,在去除护套时,注射器被其的弹簧偏压向后推动,以从壳体的前端向后移动针。因此,例如,护套上的向后的面向表面可以包括位于护套后端的大致环形轮缘。
有利的是,所述锁定装置可以包括前向延伸的弹性可偏转指状夹,该指状夹在前端区域具有锁定表面,且其后端区域被固定至所述壳体。
虽然以上已经描述了本发明,但它延及上文或下述的描述或权利要求中阐述的特征的任何创造性的组合。
附图说明
本发明可以以各种方式实施,且现在将参照附图,仅以举例的方式描述其的实施例,在附图中:
图1为穿过根据本发明的自动注射器的实施例的横截面视图,驱动活塞处于准备击发的位置;
图2为自动注射器装置的侧视图;
图3为穿过图1和2的自动注射器的横截面视图,注射器是伸展的且剂量被排出,并产生注射完成指示;
图4为示出被拧开且被反转用于准备击发驱动活塞的自动注射器的前端的横截面视图;
图5为示出用在图1至4的实施例中的弹簧鼓和恒力弹簧的整体透视图;
图6为纵向视图,装载有注射器且针护套从壳体的前端突出一短的距离;
图7示出为了拆除、牢固地握紧针护套的困难度;
图8为穿过适于便于去除针护套的自动注射器的第二实施例的纵向横截面视图;
图9为第二实施例的自动注射器的纵向视图;
图10为壳体前端上的部分截面详图,示出了包含在图8和9的实施例中的弹簧指状夹;
图11为弹簧指状夹的透视图;
图12和13为示出具有护套的注射器插入到壳体前端中的连续视图,弹簧指状夹在护套的后面锁定;
图14为图13的前端的放大详图,和
图15和16示出去除针护套以及针和注射器的随后向后移动的连续步骤。
具体实施方式
最初参照图1至5,示出了一种自动注射器装置,其包括前壳体部10和后壳体部12,前壳体部10和后壳体部12具有允许所述部被如图1至3中所看到的那样螺纹连接在一起的各自的螺纹部14、16。在图4中可以清楚地看见前和后壳体部。
前壳体部在其前端设置有捕获式深度调节帽18,该捕获式深度调节帽18在其前端具有注射器针可以突出穿过的孔20。前壳体部10设置有内部轴环22,其可滑动地容纳由弹簧26向后偏压的注射器托架24。注射器托架24具有被设计用于容纳包括注射器柱塞30和针32的注射器28的内部孔。注射器托架24中的孔可以设计成在其前端与注射器的一部分过盈配合(interference fit),以略微抓紧注射器。注射器托架24在其前端设置有限制注射器托架在弹簧26的作用下向后移动的肋(未示出)。
后壳体部12包含缠绕在鼓36周围的恒力驱动弹簧34。恒力弹簧的外端固定至后壳体部12的内部上的固定装置(未示出)。为了旋转而将鼓36安装在驱动活塞38中,并且恒力弹簧被设计为在驱动活塞38移向其如图1中所显示的后向位置时被激励。驱动活塞38可以锁定在其准备击发位置(cocked position),并且可以通过任何合适的机构释放,但在本实施例中这是通过设置在后壳体部12上的扳机40来完成的。
鼓36限定了其中封闭具有北磁极和南磁极的球形磁体44的凹陷42。在凹陷42的底部中设置有软铁保持器元件46,在没有其它磁体作用的情况下该软铁保持器元件46将保持球形磁体抵靠凹陷42的底部。
后壳体部12在其壁部中设置有捕获式的固定的磁体48,该磁体48定位在驱动活塞38的操作冲程的前端。捕获式磁体48被定位成,使得当驱动活塞已经移动至完成注射的位置时,捕获式磁体和能够移动的磁体44之间的磁引力克服能够移动的磁体44和保持器46之间的引力。因此,能够移动的磁体撞击固定的磁体时产生的‘喀哒声(click)’给出了注射完成的能够听得见的指示。撞击还将产生可以由用户感觉得到的能触知的信号。
在未示出的其它实施例中,可以设置不同类型的能够听见的、能触知的或可视的指示器。例如,可以设置协作磁体,其使得元件突出或缩入壳体中,从而用户可以感觉注射完成的指示。
磁操作指示器的一个重要特征在于,它不从排出剂量的主恒力弹簧转移能量。事实上,在装置启动期间需要能量用以分开磁体,但这不会显著地减少能够用于排出剂量的能量。
现在将描述注射循环。前和后壳体部被拧开,且通过翻转前壳体部和采用帽18的鼻部将活塞推回直到它由扳机锁定为止,而将驱动活塞38推回至准备击发的位置。随着鼓36向后移动,球形磁体44被拉动离开捕获式磁体48,并由磁引力向回拉向保持器46。
注射器随后装载到前壳体部10中的注射器托架24中,且所述壳体部被螺纹地拧在一起。在这种操作期间或之后通过合适的装置(如下文描述的)去除所述帽。自动注射器随后处于图1中所示的准备射出的状态。在射出时,鼓36和驱动部分38在驱动弹簧26的作用下被释放用于向前移动,使得驱动活塞38向前移动注射器柱塞30,以排出剂量。接近冲程的末端时,当已经排出所要求量的药物时,鼓36足够靠近捕获式磁体,使捕获式磁体用比由保持器所施加的力更大的力吸引球形磁体,以便有指示注射完成的大声的喀哒声。
现在参照图6至16,现在描述便于去除针护套的配置。如在图6和7中所看到的那样,当在注射之前被与注射器组装时,典型的针护套50仅从帽18向前延伸一短的距离。这不足以使某个人能够足够紧地抓紧针护套以拆下它。因此,存在的风险是,用户通过在将注射器插入注射器托架之前去除护套50而规避这种问题,且具有针刺受伤的伴随风险。
因此,如在图8至16中看到的那样,设置了弹簧指状夹52,其固定至前壳体部或被连接到其上的部件,并向前向内延伸。弹簧指状夹52设计为使得在如图13中所示的注射器已经插入注射器托架24且克服弹簧26的偏压向前推动注射器托架时其前端可以在针护套50的向后环形肋的后面锁定。弹簧指状夹将注射器和护套保持在这一向前的位置,使得护套具有更大的部分可以用于抓紧和去除。只要通过松开护套就可去除护套并且因此克服针护套和注射器的针接口之间的摩擦配合,注射器在弹簧26的作用下向后回射,使得针安全地位于帽18内。随后如之前描述的那样,该装置被准备好用于使用。

Claims (8)

1.一种注射装置,包括:
注射器(28),设置在壳体(10、12)内;
驱动元件(38),能够从第一位置移动至第二位置,以从所述注射器排出剂量;
磁操作指示器(44、46、48),用于指示注射完成;
其特征在于,所述指示器包括两个协作元件,分别地,其中一个协作元件(44)与所述驱动元件相关联,而另一个协作元件(48)与所述壳体相关联,且所述指示器被布置成使得在所述驱动元件(38)到达或靠近所述第二位置时,所述两个协作元件(44、48)之间的相对位置被作用在其间的磁力的作用而改变,用于产生提供可听见的和能触知的注射完成指示中的至少一种的撞击。
2.根据权利要求1所述的注射装置,其中所述协作元件中的另一个协作元件(48)包括固定至所述壳体上的捕获式元件,且所述协作元件中的一个协作元件(44)包括相对于所述驱动元件能够移动的元件。
3.根据权利要求2所述的注射装置,其中所述捕获式元件(48)和所述能够移动的元件(44)被磁化。
4.根据权利要求2所述的注射装置,其中铁磁保持器元件(46)与所述驱动元件(38)相关联,适合于临时限制所述能够移动的元件(44),直到它在由于所述捕获式元件(48)的靠近而在磁力的作用下被移动为止。
5.根据权利要求1所述的注射装置,其中所述磁操作指示器另外产生可视的注射完成指示。
6.根据权利要求2所述的注射装置,其中所述可听见的注射完成指示由于所述能够移动的元件(44)和所述捕获式元件(48)之间的撞击而产生。
7.根据权利要求2所述的注射装置,其中所述驱动元件(38)具有与之相关联的凹陷(42),该凹陷(42)用于容纳所述能够移动的元件(44)并允许由于与所述捕获式元件(48)的相互磁性作用,所述能够移动的元件(44)相对于所述凹陷的大致横向移动。
8.根据权利要求7的注射装置,其中所述凹陷(42)横向地延伸,且包括相关联的保持器元件(46),设置在所述凹陷的一个端区域处,所述凹陷的一个端区域远离面向所述捕获式元件的所述凹陷的端区域。
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