Drive mechanism for an autoinjector

一种驱动机构、致动器的技术，应用在自动注射器、注射器、皮下注射器械等方向，能够解决保持件卡住、保持件弯曲、柱塞杆不能释放等问题

Active Publication Date: 2018-01-26
SHL MEDICAL AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] While this rotor solution works well in most cases and reduces the number of parts compared to more conventional solutions, there have been occasions when the rotational movement of the rotor caused the retainer to curved case
This in turn causes the retainer to become jammed so that the plunger rod cannot be released in the intended manner

Method used

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  • Drive mechanism for an autoinjector
  • Drive mechanism for an autoinjector
  • Drive mechanism for an autoinjector

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0024] In the following description the term drug delivery device is used. In this context, medicament delivery devices may include devices capable of delivering a quantity of medicament to a user, such as injection devices with or without injection needles, various inhalation devices such as powders with a mouthpiece or nasal aspirator, , aerosol-driven gas nebulizers), dispensing devices for dispensing tablets (such as perforated dispensing devices, emulsion / gel dispensing devices), etc. The drug delivery device may be disposable or reusable and may have a drug container adapted to hold a particular drug in a particular form.

[0025] Also, the term "distal / distal end" refers to the part / end of the device or its components that is furthest from the patient's medicament delivery site during use of the device. Accordingly, the term "proximal / proximal end" refers to the part / end of the device or its components that is closest to the patient's drug delivery site during use of t...

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PUM

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Abstract

The present invention relates to a drive mechanism for use with a medicament delivery device, comprising a plunger rod (68), a drive spring (72) operably arranged to the plunger rod, an actuator (52)comprising a holding member (60) releasibly engaged to the plunger rod (68) for holding said plunger rod (68) with said drive spring (72) in a tensioned state, a rotator (38) operably connected and movable relative to said actuator (52) and configured to interact with said holding member for holding said holding member in engagement with the plunger rod, an activator (30) operably connected to said rotator (38). The invention is characterized in that the activator (30) is configured to rotate and subsequently linearly displace the rotator (38) in relation to the actuator (52) such that said holding member (60) is released from the plunger rod (68).

Description

technical field [0001] The present invention relates to a drive mechanism for a drug delivery device, in particular to a drug delivery device with highly automated functions. Background technique [0002] Drug delivery devices intended and designed to be used and operated by users other than professional nurses or physicians (ie, operated by the patient himself) are continually being developed. The applicants of the present invention have developed a number of drug delivery devices that exhibit a high degree of automation of functions, including drug mixing, priming, piercing, injection needle withdrawal, and / or drug delivery member shield extension. [0003] In order to produce several such functions while keeping the number of parts as small as possible, it is common to make use of so-called rotors, which are generally tubular elements capable of turning within the housing of the drug delivery device, while Rotating the trigger supports and / or performs different functions...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): A61M5/20A61M5/315
CPCA61M5/2033A61M2005/2013A61M5/3148A61M5/31576A61M2005/31588A61M5/31511A61M5/31565A61M5/326
InventorA.博斯特罗姆
OwnerSHL MEDICAL AG