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Autoinjector having two springs for biasing the shroud forwardly

A technology of automatic injection and protective shield, which is applied in the direction of automatic injectors, syringes, hypodermic injection equipment, etc., and can solve problems such as hindering the observation of syringes

Active Publication Date: 2013-09-04
OWEN MUMFORD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this arrangement is, in particular, that the contents of the syringe must or needs to be viewed prior to use, and the rotation of the spring prevents viewing of the syringe

Method used

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  • Autoinjector having two springs for biasing the shroud forwardly
  • Autoinjector having two springs for biasing the shroud forwardly
  • Autoinjector having two springs for biasing the shroud forwardly

Examples

Experimental program
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Embodiment Construction

[0028] Embodiments of the automatic injection device described below and shown in the accompanying drawings are designed to automatically inject a selected dose of a medicament when an injection position is given and an injection is triggered. First refer to figure 1 and 2 , the automatic injection device comprises a rear assembly 10 containing a drive mechanism and a front assembly 12 for receiving a syringe 13 with a medicament. The front and rear assemblies snap fit together during manufacture. On the forward end of the device is a removable cover 14 which also serves as a needle shield removal device, as described below. At the rear end of the rear assembly is a rear cover 16 which includes a safety pin which prevents abnormal or accidental triggering of the injection by the drive mechanism and which also covers a trigger injection button 18 .

[0029] now refer to image 3 , the front assembly 12 includes an outer body housing 20 of generally transparent plastic mater...

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PUM

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Abstract

An autoinjector has a main body (10, 12) containing a syringe (13) or cartridge with a needle at its front end for being moved forwardly in the body to extend the needle from said body for an injection, said body housing in a forward region a shroud (24) having a forward portion of generally tubular form (32), the shroud being moveable longitudinally between a rearward retracted position and a forward extended position, the autoinjector further including a spring arrangement for biasing the shroud forwardly, said spring arrangement (44) including two springs disposed alongside and spaced from the longitudinal axis.

Description

technical field [0001] The present invention relates to automatic injection devices. Background technique [0002] In conventional automatic injection devices, the needle shield may be biased between a retracted position and an extended position by means of a compressed spring surrounding the syringe. The disadvantage of this arrangement is, in particular, that the contents of the syringe must or needs to be viewed prior to use, and the rotation of the spring prevents viewing of the syringe. Contents of the invention [0003] Thus, in one aspect, the present invention provides an automatic injection device comprising a body housing a syringe or barrel having a needle at its front end for use in the inside the body is moved forward to protrude the needle from the body for injection, the body houses a shield in the front region, the shield has a front portion of generally tubular shape, The shield is longitudinally movable between a rearwardly retracted position and a forw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/20A61M5/32
CPCA61M5/2033A61M5/3257A61M5/3204A61M5/20A61M2005/2006A61M5/3202A61M5/326A61M2005/206
Inventor 罗伯特·沃曾克罗夫特
Owner OWEN MUMFORD