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Drive mechanism for drug delivery device

A driving mechanism and conveying device technology, applied in the direction of drug devices, infusion sets, other medical devices, etc., can solve problems such as user accidents, medical products cannot be used to treat patients, and medical product waste, etc., and achieve high-resolution effects.

Active Publication Date: 2020-07-17
SANOFI AVENTIS DEUT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage of drug delivery devices that require a primed operation is that the user may accidentally inject the primed dose
Moreover, priming operations result in wastage of medicinal products, since during priming operations, medicinal products cannot be used to treat patients

Method used

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  • Drive mechanism for drug delivery device
  • Drive mechanism for drug delivery device
  • Drive mechanism for drug delivery device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0157] figure 1 A part of the drug delivery device 1 is shown in a cross-sectional view. figure 1 The drug delivery device 1 shown in is an injection device. In particular, the drug delivery device 1 is a pen-type injection device. Furthermore, the drug delivery device 1 is a fixed dose device. The drug delivery device 1 is a disposable device.

[0158] The drug delivery device 1 comprises a drive mechanism 2 . The drive mechanism 2 includes a piston rod 3 . The piston rod 3 is movable in the distal direction 4 . In particular, the piston rod 3 is configured to move in the distal direction 4 during a dose dispensing operation.

[0159] Furthermore, the drug delivery device 1 comprises a cartridge holder 5 . A cartridge 6 including a bung 7 is arranged in a cartridge holder 5 . The medicinal product can be expelled from the cartridge 6 by moving the bung 7 in the distal direction 4 towards the outlet of the cartridge 6 .

[0160]Furthermore, the drug delivery device co...

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PUM

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Abstract

The present disclosure concerns a drive mechanism for a drug delivery device, having a first and a second state and comprising a piston rod configured to be moved in a distal direction when the drive mechanism is operated and an adjusting member, wherein the adjusting member is rotatable relative to a body of the drug delivery device in the first state of the drive mechanism and is prevented from rotating relative to the body in the second state of the drive mechanism, and wherein the adjusting member is configured to adjust an axial position of the piston rod in the first state of the drive mechanism.

Description

technical field [0001] The present invention relates to a drive mechanism for a drug delivery device. Background technique [0002] It is well known that drug delivery devices are generally used for the administration of medicinal products such as insulin or heparin, but also for other medicinal products, especially for self-administration by patients. The drug delivery device can be configured as a pen-type injector, which can dispense predetermined doses of a fluid medical product. However, drug delivery devices can also deliver variable doses of medicinal products. [0003] Before using the drug delivery device for the first time, the user may dispense a small amount of product. Thus, the influence of manufacturing tolerances of the mechanical parts of the drug delivery device can be eliminated. The operation of dispensing a small amount of product prior to first use is also referred to as priming of the drug delivery device. Users unfamiliar with drug delivery device...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/31A61M5/315
CPCA61M5/3146A61M5/31515A61M5/31551A61M5/31585A61M2207/00A61M2207/10A61M5/31571
Inventor D·A·普伦特里N·雷卡亚P·R·德拉珀P·格里芬D·R·默瑟
Owner SANOFI AVENTIS DEUT GMBH