Injection device having mode defining elements

A technology of injection equipment and modes, applied in the directions of syringes, auto-injectors, hypodermic injection devices, etc., can solve the problem of not being able to set a dose exceeding a predetermined dose, etc.

Active Publication Date: 2011-01-05
NOVO NORDISK AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dose knob cannot be turned past the third position and therefore no dose can be set beyond the intended dose

Method used

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  • Injection device having mode defining elements
  • Injection device having mode defining elements
  • Injection device having mode defining elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] figure 1 is a perspective view of an injection device 1 according to an embodiment of the invention. The injection device 1 includes a housing 2 and a cartridge accommodating portion 3 that accommodates a cartridge 4 containing a liquid drug. At the distal end of the cartridge receiving part 3 there is provided a threaded part 5 which can be used to connect the injection needle to the injection device 1 . The injection device 1 further comprises a dose knob 6 and an injection button 7 , both arranged at the proximal end of the injection device 1 . In order to set a dose the injection knob 6 must be turned, and in order to inject the set dose the injection button 7 must be pressed in the distal direction, ie towards the housing 2 .

[0048] figure 2 Yes figure 1 Perspective view of a selected part of the injection device 1 in FIG. More specifically, the dose knob and injection button have been removed in order to allow visibility of the portion disposed below the d...

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PUM

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Abstract

An injection device (1) for injecting predetermined doses of liquid drug is disclosed. The injection device (1) comprises a dose setting mechanism and an injection mechanism. A torsion spring (12) is connected to the dose setting mechanism and to the injection mechanism in such a manner that energy is stored in the torsion spring (12) during dose setting, and the energy is released during injection, the stored energy being used for causing the set dose to be injected. A first mode defining element (8) and a second mode defining element (9) are angularly movable relative to each other in response to operation of the dose setting mechanism. They are also axially movable relative to each other between a first position in which the dose setting mechanism can be operated to set a dose and a second position in which the injection mechanism can be operated to inject a set dose. The mode defining elements (8, 9) are shaped in such a manner that mutual axial movements between the first position and the second position are only possible at a limited number of mutual angular positions, said angular positions each corresponding to setting of a predetermined dose of liquid drug. Thereby the risk of setting and / or injecting an incorrect dose is considerably reduced. Furthermore, the torsion spring (12) ensures easy operability for persons having poor dexterity or low finger strength.

Description

technical field [0001] The present invention relates to an injection device for injecting predetermined doses of liquid medicine, for example for injecting a single fixed number of medicine doses, or for injecting a limited number of different number of medicine doses. More specifically, the present invention relates to an injection device that is driven by energy stored in a spring element and in which it is possible to easily ensure that the correct dose is set and that the set dose is injected completely. The injection device of the present invention is particularly suitable for self-injection of liquid medicines such as insulin for the treatment of diabetes by the user. Background technique [0002] WO 02 / 30495 discloses a pen delivery device and method for administering parathyroid hormone. The device allows injection of a single predetermined dose. The method is a three-step method utilizing visual indicators to set injectable dose delivery. The dose knob is rotated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/315
CPCA61M2005/202A61M5/20A61M5/31591A61M5/3156A61M5/31583A61M5/3155
Inventor C·P·恩加尔德T·H·马库森F·米切尔森M·索伦森
Owner NOVO NORDISK AS
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