Auto-injector

An automatic injection and syringe technology, applied in the direction of automatic injectors, syringes, hypodermic injection equipment, etc., can solve problems such as strong impact, and achieve the effects of reducing production costs, reducing the number of parts, and improving reliability

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

AI Technical Summary

Problems solved by technology

This can cause the user to feel a strong impact when the needle is inserted into the skin, and a strong force when the injection is triggered

Method used

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Examples

Experimental program
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Embodiment Construction

[0153] The term "slope joint" in this specification is a joint between two parts at least one of which has a slope that engages the other so that when the two parts are pushed against each other in the axial direction One of the two parts deflects sideways when in contact with each other, assuming that this part is not prevented from deflecting sideways.

[0154] Figure 1A with 1B Two longitudinal sections of the automatic injection device 1 are shown in different sections, which are rotated by approximately 90° relative to each other, the starting state of the automatic injection device 1 before the start of the injection. The automatic injection device 1 comprises a housing 2 . In the following, the frame 2 is generally considered to be fixed in position, so the movements of other components are described relative to the frame 2 . A syringe 3 with a hollow injection needle 4 , for example a Hypak syringe, is arranged on the proximal part of the automatic injection device ...

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Abstract

The invention refers to an auto-injector (1) for administering a dose of a liquid medicament (M), comprising a tubular chassis (2) telescopable in a tubular case (12); a carrier subassembly comprising a tubular carrier (7) slidably arranged relative to the chassis (2) inside the case (12), the carrier (7) adapted to contain a syringe (3) with a hollow injection needle (4), a drive spring (8) and a plunger (9) for forwarding load of the drive spring (8) to a stopper (6) of the syringe (3), wherein the syringe (3) is lockable for joint axial translation with the carrier (7); a control spring (19) arranged around the carrier (7) for translating the carrier (7) in a proximal direction (P) for insertion of the needle (4) through the chassis (2) into an injection site, wherein the control spring (19) is arranged to bias the case (12) against the chassis (2) in a distal direction (D), so as to extend the chassis (2) out of a proximal end (P) of the case (12), wherein an insertion depth of the needle (4) is defined by the carrier (7) abutting the chassis (2) in a predefined position, wherein the case (12) is arranged to release or allow release of the control spring (19) for needle insertion on translation of the case (12) in the proximal direction (P) relative to the chassis (2) against the bias into an advanced position.

Description

technical field [0001] The invention relates to an automatic injection device for administering doses of liquid medicaments according to the preamble of claim 1 . Background technique [0002] Administering injectables presents many risks and challenges, both psychologically and physically, for users and healthcare professionals. [0003] Injection devices (ie, devices capable of delivering medicament from a medicament container) typically fall into two types - manual devices and automatic injection devices. [0004] In manual devices, the user must provide mechanical energy to drive fluid through the needle. This is typically done with some form of button / plunger which the user must continuously depress during an injection. This solution has a number of drawbacks for the user. If the user stops pressing the button / plunger, the injection will also stop. This means that if the device is not used properly (ie the plunger is not fully depressed to its end position), the use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/20A61M5/32
CPCA61M5/2033A61M2205/582A61M5/326A61M5/3157A61M5/46A61M2205/581A61M5/32A61M5/20A61M2005/206A61M2205/583
Inventor S.F.布里雷顿T.肯普R.伯内尔M.埃克曼
Owner SANOFI AVENTIS DEUT GMBH
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