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Restrictor mechanism and injection device having the same

A technology of injection device and restrictor, applied in the directions of syringes, auto-injectors, hypodermic injection devices, etc., can solve problems such as application

Inactive Publication Date: 2019-03-15
SANOFI SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it is necessary that the user exert axial force during dose dispensing, which may be a disadvantage for manually impaired users

Method used

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  • Restrictor mechanism and injection device having the same
  • Restrictor mechanism and injection device having the same
  • Restrictor mechanism and injection device having the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0128] The injection device 1 according to the invention is figure 1 shown in an exploded view. The injection device comprises a cartridge carrier 10, a cartridge 20 and a restrictor mechanism. The limiter mechanism comprises: a housing with an outer housing 30 and an inner housing 40; a dial sleeve as a dose setting member 50 with a dial handle 51; a restriction element 60; a tube drive member 70; a lead screw 80 bearing 81 ; nut 90 ; drive spring 100 with storage reel 101 and output reel 102 ; return spring 110 ; dose button 120 ; display wheel 130 and gear 140 . With the exception of gear 140, storage spool 101 and spring 100, all components are concentrically located about the common main axis of the mechanism. In more detail, the drive member 70 surrounds the lead screw 80 , the output spool 102 and the dose setting member 50 surround the drive member 70 , and the limit element 60 and the display wheel 130 surround the dose setting member 50 . Furthermore, a nut 90 is ...

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PUM

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Abstract

The present invention relates to a restrictor mechanism suitable for injection devices, especially pen-type drug delivery devices. The mechanism comprises: a housing (10, 30, 40; 40'); a dose setting member (50) which during dose setting rotates relative to the housing (10, 30, 40; 40') in a first direction and rotation in a second opposite direction relative to the housing (10, 30, 40; 40') during dose dispensing; and a limiting element (60) limiting rotational movement of the dose setting member between a zero dose position and a maximum dose position . The restricting element (60) is rotationally constrained but axially displaceable relative to one of the housing (10, 30, 40; 40') or the dose setting member (50) in a first path, and in a second path The two helical paths (53) are movable relative to the other of the housing (10, 30, 40; 40') or the dose setting member (50). At least one of the first path and the second path (53) has an end stop (54, 55) that limits relative movement of the restricting element (60).

Description

technical field [0001] The present invention relates to a restrictor mechanism suitable for injection devices, especially pen-type drug delivery devices. The mechanism comprises: a housing; a dose setting member which rotates in a first direction relative to the housing during dose setting and which rotates in a second opposite direction relative to the housing during dose dispensing; and a limiting element with The limit dose setting member rotates between a zero dose position and a maximum dose position. Furthermore, the invention relates to an injection device comprising such a restrictor mechanism and a cartridge containing a medicament. Background technique [0002] A pen-type drug delivery device may be used for routine injections by personnel without formal medical training. This application may be increasingly common in patients with diabetes, where self-treatment allows such patients to effectively manage their disease. Indeed, such drug delivery devices allow th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/20A61M5/315A61M5/31
CPCA61M5/20A61M5/31541A61M5/31553A61M5/3157A61M5/31593A61M2005/2086A61M2005/3143A61M2005/3154A61M5/31583A61M5/31536A61M5/2033
Inventor D·D·希金斯D·A·普伦特里R·维齐M·琼斯W·马什J·巴特勒
Owner SANOFI SA