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Drive Mechanisms for Injection Devices

A driving mechanism and injection device technology, which can be used in hypodermic injection devices, drug devices, and other medical devices, and can solve problems such as discarding

Active Publication Date: 2020-11-13
SANOFI AVENTIS DEUT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, disposable type injection devices are discarded when the cartridge has been dispensed or used up

Method used

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  • Drive Mechanisms for Injection Devices
  • Drive Mechanisms for Injection Devices
  • Drive Mechanisms for Injection Devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0173] figure 1 The drug delivery device 1 is shown in the form of an injection pen. The device has a figure 1 shown in the distal end of the left and located at the figure 1 Proximal on the right-hand side of . All components or parts in the drug delivery device 1 are in Figure 14 is shown in more detail in , but does not show blocking members or blocking structures. The drug delivery device 1 comprises an outer housing part 10, an inner body 20, a piston rod 30, a driver 40, a last dose nut 50, a display member 60, a dose member 70, a cartridge 80 and a cap 120, i.e. a total of nine individual components . Such as Figure 14 As shown, the needle assembly comprising the needle hub 2 and the needle cap 3 can be provided as an interchangeable add-on part. Figures 12 to 26 The general concept and structure of the drive mechanism shown in is similar to that disclosed in WO 2014 / 033197 A1, which is incorporated by reference in this application.

[0174] The outer housing...

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PUM

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Abstract

The invention relates to a drive mechanism of an injection device for setting and dispensing doses of medicaments, the drive mechanism comprising: - an inner body (20), which can be fixed inside the housing (10) of the injection device (1) and comprising An elongated shaft (20a) extending in the axial direction (z) and having an external thread (21); - a tubular display member (60; 160; 260) having an external thread (21) with the inner body (20) an engaged internal thread (61); - a dose member (70) axially displaceable relative to the display member (60; 160; 260) between a dose setting position (S) and a dose dispensing position (D), - wherein the display member (60; 160; 260) comprises at least one blocking member (66), the blocking member (66) being movable along the axial direction (z) between a blocking position (B) and a releasing position (R), and Engageable with a blocking structure (26) on the periphery of the inner body (20), - wherein, when in the blocking position (B), the blocking member (66) is axially connected to the dose member (70) and to the blocking structure (26 ) to block axial displacement of the dose member (70) from the dose setting position (S) to the dose dispensing position (D).

Description

technical field [0001] The invention in one aspect relates to a drive mechanism for an injection device, such as a pen injector for setting and dispensing doses of medicament. In particular, the present invention relates to injection devices providing a minimum dose mechanism, a dose setting and dispensing mechanism operable to dispense a dose only if the dose exceeds a predetermined minimum threshold. Background technique [0002] Injection 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 that of a general syringe. [0003] Injection devices, especially pen-type injectors, are subject to a number of user-specific requirements. For example, in the case of a patient suffering from a chronic disease such as diabetes, the patient may be physically weak and may also have impaired vision. Therefore, suitable injection devices, especially those intended for home...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/315
CPCA61M5/31535A61M5/31543A61M5/31551A61M5/31585A61M2205/582A61M2205/581A61M5/31575A61M5/31541A61M5/31545
Inventor D·A·普伦特R·维齐J·D·克罗斯
Owner SANOFI AVENTIS DEUT GMBH