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Dose setting mechanism and injection device

A dose setting and dosage technology, applied in the direction of syringes, auto-injectors, ampoule syringes, etc., can solve problems such as no distribution

Active Publication Date: 2014-01-29
SANOFI AVENTIS DEUT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the needle remains clogged, and while attempting to complete the undelivered or apparently partially delivered dose, the user repeats the cycle of depressing and releasing the dose button while the device repeatedly jams and resets itself, the digital sleeve appears to show The unit is dispensing medication in stages and the digital sleeve eventually returns to displaying zero units, i.e., the digital sleeve appears to show "dose complete" when in fact no medication is dispensed at this time

Method used

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  • Dose setting mechanism and injection device
  • Dose setting mechanism and injection device
  • Dose setting mechanism and injection device

Examples

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Embodiment Construction

[0039] figure 1 A dose setting mechanism 1 of a typical injection device with a clicker mechanism is shown. The dose setting mechanism comprises a (inner) housing member 2, a dose setting member 3 comprising a dose dial sleeve or number sleeve, a drive member 4 in the form of a drive sleeve, a tubular second clutch element 5 and a click Sound generator6. The second clutch element 5 is located between the dose setting member 3 and the drive member 4 and is rotationally coupled to the drive member 4 by means of at least one groove and corresponding splines. Furthermore, the second clutch element 5 is axially movable relative to the dose setting member 3 for rotationally coupling and decoupling the dose setting member 3 and the drive member 4 . Such as figure 1 and 14 As shown, the second clutch element 5 utilizes two sets of mating face teeth 5a, 5b provided on the inner end face of the dose setting member 3 and on the corresponding end face of the tubular second clutch elem...

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Abstract

A dose setting mechanism for a resettable drug delivery device is provided comprising a dose setting member and a drive member for driving a piston rod in a distal direction during dose dispensing, wherein the drive member comprises a proximal drive member and a distal drive member. Further, a first clutch is provided for releasably coupling the proximal drive member and the distal drive member. A spring means biases the proximal drive member and the distal drive member in the coupled state during dose setting and dose dispensing. According to one aspect of the invention engaging means are provided associated to the proximal drive member and to the dose setting member, wherein the engaging means are designed and arranged such that the proximal drive member entrains the dose setting member in the distal direction during dose setting but allows a relative axial movement of the proximal drive member with respect to the dose setting member in the proximal direction. Further, the invention refers to an injection device with such a dose setting mechanism.

Description

technical field [0001] The present invention relates to a dose setting mechanism for a drug delivery device, such as a pen-type injector, which achieves administration by injection of a medical product from a multi-dose cartridge, and wherein the user can be permitted by the device mechanism Variable doses of a drug are selected in increments or units for a given dose range. The dose setting mechanism comprises a dose setting member (eg a number sleeve) and a drive member (eg a drive sleeve). Other components such as housings, clutches and clickers may be provided. Furthermore, the invention relates to an injection device having such a dose setting mechanism. [0002] In more detail, the present invention relates to a dose setting mechanism for a resettable drug delivery device using a two-part drive sleeve which should remain coupled during dialing and dispensing and only Disengages when the user depresses the piston rod to reset the device. A resettable drug delivery dev...

Claims

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Application Information

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IPC IPC(8): A61M5/24A61M5/315
CPCA61M5/24A61M5/31533A61M5/31566A61M5/31525A61M5/31535A61M5/31565A61M5/20A61M5/315
Inventor D.A.普伦普特里
Owner SANOFI AVENTIS DEUT GMBH
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