CN101454033B - 扳机上带有减振部件的注射装置 - Google Patents

扳机上带有减振部件的注射装置 Download PDF

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CN101454033B
CN101454033B CN2007800198881A CN200780019888A CN101454033B CN 101454033 B CN101454033 B CN 101454033B CN 2007800198881 A CN2007800198881 A CN 2007800198881A CN 200780019888 A CN200780019888 A CN 200780019888A CN 101454033 B CN101454033 B CN 101454033B
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N·哈里森
D·詹宁斯
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Abstract

本发明涉及一种扳机上带有减振部件的注射装置。该注射装置(110)包括壳体(112)和驱动器(121)，该驱动器(121)在被扳机(114)释放时作用于注射器(122)。扳机(114)能从静止位置运动到活动位置，在该静止位置，所述扳机(114)使所述驱动器(121)被保持，在该活动位置，所述扳机(114)不再使所述驱动器(121)被保持。减振部件(132)被布置成与所述扳机(114)连接以防止所述装置(110)的意外启动。该注射装置(110)提供改进的可靠性并且对由冲击力，例如当装置(110)掉落在坚硬表面上时引起的损坏的恢复。扳机(114)在致动后也保持在其活动位置，表明所述装置(110)已经被使用过。此外，由扳机(114)的操作产生的令人不悦的噪音被减少。

Description

扳机上带有减振部件的注射装置
技术领域
本发明涉及一种注射装置，该注射装置接收注射器、将注射器伸出、释放注射器中的内装物并且随后自动地将注射器收起。
背景技术
以前所知的注射装置在WO95/35126和EP-A-0 516 473中示出并且倾向于采用扳机，该扳机在可释放的锁定机构允许其启动时可以被操作，以使驱动弹簧对注射器施加作用。
通常，扳机能够围绕枢转轴线旋转，使得当其第一端部被压下时，(通常与驱动弹簧接合的)第二端部同样被旋转，由此释放驱动弹簧、伸出注射器和释放其内装物。当可释放的锁定机构被接合时，扳机的旋转不受阻碍并且可以被启动。当可释放的锁定机构没有被接合时，该锁定机构起到阻止扳机旋转和释放驱动弹簧的作用。这样可以防止扳机意外被启动。
这类注射装置的一个问题是，扳机可能由于突然的冲击力而意外地被启动，例如由于与注射装置掉落和击地有关的冲击力。与设计意图相反，装置中的互锁可能由于这样的力而失效，扳机的启动被许可并且实际上可能作为冲击的直接结果发生。另一个问题是扳机在启动后可能会松动并且自由运动，因此可以回到其初始位置，所以使得弄不清楚装置是否已经被使用过。
发明内容
本发明的注射装置设计用于克服这些问题和其他问题。
如上所述，并且根据本发明的第一方面，提供了一种注射装置，其包括：
壳体，其适合于接收具有排放喷嘴的注射器，注射器可在缩回位置和伸出位置之间运动，在缩回位置，排放喷嘴被容纳在壳体内，在伸出位置，排放喷嘴从壳体穿过出口伸出；
驱动器，其受到作用，并且又对注射器起作用；
扳机，其能从静止位置运动到活动位置，在静止位置，所述扳机使所述驱动器被保持，在活动位置，所述扳机不再使所述驱动器被保持；和
减振部件，其位于所述扳机上。
减振部件吸收来自冲击的能量并且减少冲击向扳机的传递。由此，减振部件防止所述装置意外被激活，否则，如果例如注射装置掉落在坚硬表面上可能会发生意外激活。设置减振部件的其他好处是：扳机在启动后被保持在其活动位置，从而在该装置被使用后一目了然；在操作扳机时减少噪音。
在本发明的一种实施方式中，减振部件在扳机和壳体之间作用以抵抗扳机的运动。
优选地，扳机围绕枢转轴线可旋转地安装，并且减振部件随后可以在扳机和壳体之间作用以抵抗扳机的旋转运动。
驱动器受偏压部件的作用，偏压部件优选为弹簧。因此，当扳机在其静止位置时，扳机的一个端部使驱动器被保持。
优选地，减振部件定位在枢转轴线和扳机的使驱动器被保持的端部之间。
有利地，减振部件能够使扳机在启动后保持在其活动位置。由此起到指示注射装置已被使用的作用。
减振部件可以是粘性流体。优选地，粘性流体是非牛顿流体。优选地，粘性流体是无毒的并且对塑料没有损害。
扳机可以包括至少一个与粘性流体接触的开口。优选地，所述至少一个开口被定位在扳机的上表面和下表面之间。
优选地，粘性流体被定位在扳机上表面和壳体内表面之间的区域中。
有利地，所述至少一个开口的尺寸能够允许粘性流体从扳机上表面和壳体内表面之间的区域中溢出。
本发明的粘性流体的粘稠度可以由其工作前针入度(unworkedpenetration)来表征。针入度被定义为，在限定样本尺寸、穿刺器重量和几何形状、时间(通常为5秒)的条件下，标准穿刺器例如圆锥或针在重力作用下沉入半固体基质中的深度。本文所述的针入度值是在ISO 2137描述的条件下测得的。
有利地，粘性流体的粘稠度使得在启动扳机之前粘性流体在扳机上保持就位，但是在扳机被用户操作时粘性流体也可以经由开口离开扳机限定的区域。
粘性流体可以具有在16mm和31mm之间的工作前针入度。优选地，粘性流体具有在17.5mm和21mm之间的工作前针入度。更加优选地，粘性流体具有在19mm和20mm之间的工作前针入度。根据本发明的粘性流体可以是摩力克(
Figure G2007800198881D00032
111)。
有利地，减振部件防止扳机的意外启动。
附图说明
本发明现将参照附图通过实施例来描述。
图1示出了根据本发明的注射装置的立体图；
图2示出了图1的注射装置的侧视图，其中注射装置的壳体被去掉；
图3示出了图1的注射装置的扳机和壳体的上方部分的立体图；
图4示出了图1的注射装置的扳机和壳体的上方部分的仰视图；和
图5示出了图1的注射装置的例视图，展示了减振部件在扳机和壳体的上方部分之间的定位。
具体实施方式
图1至5示出了根据本发明的第一实施方式的注射装置110.注射装置110具有注射装置壳体112。
注射器122包含在壳体112内。注射装置110包括扳机114和可释放的锁定机构116。扳机114具有第一端部114a和第二端部114b。扳机114可围绕枢轴115从静止位置旋转到活动位置。扳机114的第二端部114b与驱动联接件121连接，该驱动联接件121受驱动弹簧120作用。驱动联接件121与注射器122连通。
扳机114围绕枢轴115沿着R方向的旋转(即在其第一端部114a处向下进入壳体112)使扳机114的第二端部114b从驱动联接件121脱开，由此让驱动弹簧120(经由驱动联接件121)驱动注射器122离开壳体112的孔口118。
可释放的锁定机构116与滑套126连通，在第一位置时，该滑套126从壳体112的孔口118伸出。通过滑套126运动进入壳体112中到达第二位置，可释放的锁定机构116被禁用。
滑套126的第一端部126a可以放在有待输入药物的身体上，由此禁用可释放的锁定机构116并且允许扳机114沿着R方向从其静止位置旋转到其活动位置。
扳机114包括开口128，该开口128从上表面130行进到下表面131。开口128被定位在扳机114的第二端部114b和枢轴115之间。减振部件132被定位在扳机114的上表面130和壳体112的内表面134之间并且在开口128上方。减振部件132是粘性流体，该粘性流体在装置110的正常使用期间具有足以使其在壳体112和扳机114之间保持就位的粘度。
扳机114沿着R方向围绕枢轴115旋转将导致第一端部114a向下运动到壳体112中并且导致第二端部114b向上朝着壳体112的内表面134运动。开口128和减振部件132在壳体112的内表面134和扳机114的上表面130之间作用，为R方向的旋转提供运动阻力F。
在用户正常操作扳机114时，粘性流体在扳机114的上表面130和壳体112的内表面134之间受到压缩，由此给扳机114的动作提供阻力。粘性流体可以留出限定区域136，该区域通过这些表面经由开口128界定。在粘性流体离开限定区域136时，扳机114可沿着R方向旋转，并且装置110像上面描述的那样工作。在扳机114工作之后，绝大部分粘性流体被置于扳机114的下表面131上。一定量残留的粘性流体保留在扳机114的上表面130上并与壳体112的内表面134接触。由于其粘度，粘性流体具有一定的粘附特性，该特性使扳机114被保持在其活动位置，由此指示装置110已经被使用过。
通过减振部件132防止了注射装置110的意外操作。如果由滑套126和可释放的锁定机构116提供的互锁由于冲击力(例如因为装置掉落到坚硬表面上)而失效，减振部件132为扳机114沿着R方向的旋转动作提供了阻力。减振部件132还起到减少这样的冲击力向扳机114传递的作用，防止了装置110自启动。开口128和减振部件132的布置由此允许装置110以更加可靠的方式工作。设置减振部件132具有额外的好处，即在装置110掉到坚硬表面上时限制对装置110的损坏。还减少了由扳机114的操作产生的任何噪音，该扳机可能令装置110的使用者痛苦不堪。
当然应当理解，以上仅仅通过示例性的方式描述了本发明，在本发明的范围内可以做细节上的修改。

Claims (22)

1.一种注射装置，包括：
壳体，其能够接收具有排放喷嘴的注射器，所述注射器能在缩回位置和伸出位置之间运动，在所述缩回位置，所述排放喷嘴被容纳在所述壳体内，在所述伸出位置，所述排放喷嘴从所述壳体穿过出口伸出；
驱动器，其受到作用，并且又对所述注射器发生作用；
扳机，其能从静止位置运动到活动位置，在所述静止位置，所述扳机使所述驱动器被保持，在所述活动位置，所述扳机不再使所述驱动器被保持；和
减振部件，其位于所述扳机上，
其中，所述减振部件能够使所述扳机在启动后保持在其活动位置。
2.根据权利要求1所述的注射装置，其特征在于，所述减振部件在所述扳机和所述壳体之间作用以抵抗所述扳机的运动。
3.根据权利要求1所述的注射装置，其特征在于，所述扳机围绕枢转轴线能够旋转地安装。
4.根据权利要求3所述的注射装置，其特征在于，所述减振部件在所述扳机和所述壳体之间作用以抵抗所述扳机的旋转运动。
5.根据权利要求1所述的注射装置，其特征在于，所述驱动器受到偏压部件的作用。
6.根据权利要求5所述的注射装置，其特征在于，所述偏压部件为弹簧。
7.根据权利要求1所述的注射装置，其特征在于，当所述扳机处于静止位置时，所述扳机的一个端部使所述驱动器被保持。
8.根据权利要求3至7中任一项所述的注射装置，其特征在于，所述减振部件定位在所述枢转轴线和所述扳机的使所述驱动器被保持的端部之间。
9.根据权利要求1所述的注射装置，其特征在于，所述减振部件是粘性流体。
10.根据权利要求9所述的注射装置，其特征在于，所述粘性流体是非牛顿流体。
11.根据权利要求9或10所述的注射装置，其特征在于，所述粘性流体被定位在所述扳机的上表面和所述壳体的内表面之间的区域中。
12.根据权利要求9或10所述的注射装置，其特征在于，所述扳机包括至少一个与所述粘性流体接触的开口。
13.根据权利要求11所述的注射装置，其特征在于，所述扳机包括至少一个与所述粘性流体接触的开口。
14.根据权利要求12所述的注射装置，其特征在于，所述至少一个开口被定位在所述扳机的上表面和下表面之间。
15.根据权利要求14所述的注射装置，其特征在于，所述开口的尺寸能够允许所述粘性流体从所述扳机的上表面和所述壳体的内表面之间的区域中溢出。
16.根据权利要求13所述的注射装置，其特征在于，所述至少一个开口被定位在所述扳机的上表面和下表面之间。
17.根据权利要求16所述的注射装置，其特征在于，所述开口的尺寸能够允许所述粘性流体从所述扳机的上表面和所述壳体的内表面之间的区域中溢出。
18.根据权利要求9所述的注射装置，其特征在于，所述粘性流体具有在16mm和31mm之间的工作前针入度。
19.根据权利要求18所述的注射装置，其特征在于，所述粘性流体具有在17.5mm和21mm之间的工作前针入度。
20.根据权利要求19所述的注射装置，其特征在于，所述粘性流体具有在19mm和20mm之间的工作前针入度。
21.根据权利要求9所述的注射装置，其特征在于，所述粘性流体是摩力克即
Figure FSB00000465283700022
22.根据权利要求1所述的注射装置，其特征在于，所述减振部件防止所述扳机的意外启动。
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