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Drive mechanism of a drug delivery device

A technology of driving mechanism and delivery device, which is applied in the direction of drug devices, identification devices, infusion sets, etc., can solve the problem of limiting the total size of drug delivery devices, and achieve the effect of minimizing the axial size and realizing compact design

Inactive Publication Date: 2015-11-25
SANOFI SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Also, the drive mechanism should be fairly compact to limit the overall size of the drug delivery device

Method used

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  • Drive mechanism of a drug delivery device
  • Drive mechanism of a drug delivery device
  • Drive mechanism of a drug delivery device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0169] exist figure 1 , figure 2 and Figure 10 In , the driving mechanism 3 of the drug delivery device 10 is shown in an assembled view and an exploded view, respectively. The drug delivery device 10 may be of the pen-injector type, and may comprise a substantially cylindrical and axially elongated shape. In the present set of figures, the axial direction is indicated with reference numeral 1 , while the opposite proximal direction is indicated with reference numeral 2 . The drug delivery device 10 comprises a proximal housing part 30 for receiving and housing the drive mechanism 3 , in particular the functional and movable parts constituting the drive mechanism 3 .

[0170] In the distal direction 1 , the housing 30 is connected with a cartridge holder 12 adapted to receive and receive a cartridge 14 containing a medicament to be dispensed by the drug delivery device 10 . The cartridge 14 generally comprises a cylindrically shaped glass barrel 18 sealed in the distal d...

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Abstract

The present invention relates to a drive mechanism of a drug delivery device for dispensing of a dose of a medicament, the mechanism comprising: - a housing (30, 120) extending in an axial direction (1, 2), - a piston rod (90) to operably engage with a piston (16) of a cartridge (14) to displace the piston (16) in an axial distal direction (1), - a drive sleeve (40) extending in axial direction (1, 2) and being rotatable in a dose incrementing direction (4) against the action of a spring (48) enclosing at least an axial portion of the drive sleeve (40), - a dose limiting member (110) threadedly engaged with the drive sleeve (40), rotatably locked to the housing (30, 120) and at least partially extending radially between the drive sleeve (40) and the spring (48), - at least one stop (44, 47, 113, 114) located on at least one of dose limiting member (110) and drive sleeve (40) for limiting an axial displacement of the dose limiting member (110) relative to the drive sleeve (40).

Description

technical field [0001] The invention relates to a drive mechanism for a drug delivery device and a corresponding drug delivery device. In particular, the present invention relates to an injection device, such as a pen-type injector, which includes therein a single dose and / or last dose limiting mechanism and further comprises a larger dose indicating display. Background technique [0002] Drug delivery devices for setting and dispensing single or multi-dose liquid medicaments are known per se in the art. In general, such devices have essentially a similar purpose to conventional syringes. [0003] Drug delivery devices, especially pen injectors, need to meet several user-specific requirements. For example, where a patient suffers from a chronic disease such as diabetes, the patient may be debilitated and may also have impaired vision. Therefore, a suitable drug delivery device, especially one intended for home medical use, must be structurally robust and should be easy to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/20A61M5/315A61M5/31G09F11/29
CPCA61M5/20A61M5/31541A61M5/31553A61M5/3157A61M5/31583A61M2005/3126A61M2005/3154A61M2205/581A61M2205/582
Inventor S·拜尔D·伯宁P·布兰克W·佩尔泽B·威尔登
Owner SANOFI SA