Dosing assembly for a drug delivery device with different leads and multiple thread segments

A technology of delivery device and screw thread, which is applied in the direction of medicine equipment, infusion set, and other medical equipment, etc.

Active Publication Date: 2020-07-24
SANOFI SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, prefilled cartridges cannot be removed and replaced from these devices without destroying the device itself

Method used

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  • Dosing assembly for a drug delivery device with different leads and multiple thread segments
  • Dosing assembly for a drug delivery device with different leads and multiple thread segments
  • Dosing assembly for a drug delivery device with different leads and multiple thread segments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0120] Figure 1 shows a drug delivery device in the form of an injection pen. The device has a remote ( Figure 1a the left end of the center) and the proximal end ( Figure 1a the right end of the middle). The components of the drug delivery device are in figure 2 shown in . The drug delivery device comprises a body or housing 10, a cartridge holder 20, a lead screw (piston rod) 30, a drive sleeve 40, a nut 50, a dose indicator (number sleeve) 60, a button 70, a dial handle or dose Selector 80 , torsion spring 90 , cartridge 100 , metering element 110 , clutch plate 120 , clutch spring 130 and support 140 . A needle assembly (not shown) with hub and cap can be provided as an add-on component, which can be replaced as described above. All components are arranged concentrically around a common main axis of the mechanism.

[0121] The housing 10, or body, is a generally tubular member having a proximal end of enlarged diameter. The housing 10 provides a location for the li...

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PUM

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Abstract

The present invention generally relates to an assembly for a drug delivery device comprising a first threaded member (50, 50'), a second threaded member (40, 60') having a longitudinal axis and a thread (61), The thread (61) has at least two consecutive sections (62, 63, 64) with different leads. The first threaded member (50, 50') and the second threaded member (40, 60') are adapted and arranged about the longitudinal axis of the second threaded member (40, 60') relative to the Rotate each other, whereby the first threaded member (50, 50') moves relative to the second threaded member (40, 60') along the first The two threaded members (40, 60') are axially displaced from a start position to an end position. According to the invention, the lead of the fast part (62, 64) of the thread (61) is greater than the lead of the slow part (63) of the thread (61), the fast part comprises a multi-start thread, and the slow part (63) comprises a larger lead than the fast part (62). , 64) less heads. The invention further relates to a drug delivery device for setting and dispensing several user variable doses of a medicament comprising such an assembly.

Description

technical field [0001] The present invention generally relates to an assembly for a drug delivery device and a drug delivery device comprising the same for selecting (setting) and dispensing a number of user variable doses of medicaments. Background technique [0002] Pen-type drug delivery devices may be used where regular injections are performed by persons without formal medical training. This may be increasingly common in patients with diabetes, and self-treatment allows such patients to effectively manage their disease. In practice, such drug delivery devices allow the user to individually select and dispense multiple user variable doses of drug. The present invention does not relate to so-called fixed dose devices, which only allow the dispensing of predetermined doses without the possibility to increase or decrease the set dose. [0003] There are basically two types of drug delivery devices: resettable devices (ie, reusable) and non-resettable devices (ie, disposab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/315A61M5/20
CPCA61M5/20A61M5/31541A61M5/31553A61M5/31583A61M2205/583A61M2205/582A61M2205/581A61M2005/3126A61M5/31551A61M5/31593A61M5/2033A61M5/31561
Inventor A·P·默里斯P·格里芬
Owner SANOFI SA
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