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Automatic drug injection device with torsion spring and rotatable dose setting and correction mechanism

A drug and dosage technology, applied in the direction of automatic injectors, syringes, drug devices, etc., can solve problems that hinder the design of compact and ergonomic devices

Active Publication Date: 2020-09-25
SANOFI SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This prevents compact and ergonomic device design and also has economic disadvantages, especially for single-use devices

Method used

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  • Automatic drug injection device with torsion spring and rotatable dose setting and correction mechanism
  • Automatic drug injection device with torsion spring and rotatable dose setting and correction mechanism
  • Automatic drug injection device with torsion spring and rotatable dose setting and correction mechanism

Examples

Experimental program
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Effect test

Embodiment Construction

[0125] figure 1 A medicament delivery device in the form of an injection pen is shown. The device has a remote ( figure 1 the left end of the center) and the proximal end ( figure 1 the right end of the middle). The components of a drug delivery device are shown in figure 2 middle. 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 number sleeve 60, a button 70, a dial handle or dose selector 80, a twist Spring 90 , cartridge 100 , metering element 110 , ratchet mechanism spring 120 , button spring 130 and support 140 . A needle assembly (not shown) with needle hub and needle cover can be provided as an additional component, which can be replaced as described above. All components are arranged concentrically around a common main axis of the mechanism.

[0126] The housing 10 or body is a generally tubular member having a proximal end of enlarged diameter. Housing 10 provides a lo...

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Abstract

The present invention relates generally to drug delivery devices for selecting and dispensing several user variable doses of medicaments. The device comprises a housing (10), a dose selector (80) operable by rotation relative to the housing (10) to set a dose, a number sleeve arranged within the housing (10) and carrying a dose scale (60), a drive sleeve (40), rotationally constrained to the housing (10) during dose setting and dose correction and rotatable relative to the housing (10) during dose dispensing, coupled to the housing ( 10) and coupled to the piston rod (30) of the drive sleeve (40), the drive spring (90) arranged between the housing (10) and the number sleeve (60) and deformed during dose setting on the turn ) and a bi-directional ratchet mechanism (43, 64) operatively arranged between the drive sleeve (40) and the number sleeve (60), the ratchet mechanism (43, 64) allows the dose selector and the number sleeve to move along both sides. Rotate in two directions to respectively set or correct the dose to be injected and include at least one clicker arm (43) on one of the number sleeve (60) and drive sleeve (40) acting radially On the other of the number sleeve (60) and drive sleeve (40).

Description

technical field [0001] The present invention generally relates to drug delivery devices adapted to select and dispense several user variable doses of medicaments. In more detail, the invention relates to a drug delivery device comprising a housing, a dose selector operable by rotation relative to the housing to set a dose, a number sleeve arranged within said housing, a drive sleeve rotationally constrained to the housing during setting and dose correction and rotatable relative to the housing during dose dispensing, a piston rod coupled to the housing and to the drive sleeve, A drive spring disposed between the housing and the number sleeve and a ratchet mechanism clutch operatively disposed between the drive sleeve and the number sleeve. Background technique [0002] Pen-type drug delivery devices can be used in situations where routine injections are performed by people without formal medical training. This may be increasingly common in patients with diabetes, and self-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/315A61M5/20
CPCA61M5/20A61M5/31535A61M5/31593A61M2205/582A61M2205/581A61M5/31553A61M5/31541A61M5/3157A61M2005/202A61M5/31583A61M5/2033A61M5/31551A61M2005/3126A61M2205/583A61M2205/584
Inventor R·J·V·埃弗里M·琼斯
Owner SANOFI SA
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