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automatic injection device with two springs for biasing the shield forward

一种自动注射、压缩弹簧的技术，应用在自动注射器、注射器、皮下注射器械等方向，能够解决阻碍注射器观察等问题

Active Publication Date: 2016-08-10
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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  • automatic injection device with two springs for biasing the shield forward
  • automatic injection device with two springs for biasing the shield forward
  • automatic injection device with two springs for biasing the shield forward

Examples

Experimental program
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Effect test

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 given an injection position and triggering the injection. 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 from 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 materia...

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PUM

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Abstract

An automatic injection device comprising a body (10,12) containing a syringe (13) or barrel having a needle at its forward end for being moved forward within the body , to protrude the needle from the body for injection, the body housing has a shield (24) in the front region, the shield has a generally tubular front portion (32), the The shield is longitudinally movable between a rearwardly retracted position and a forwardly extended position, the automatic injection device further comprising a spring mechanism for biasing the shield forwardly, the spring mechanism (44) comprising a set Two springs lateral to 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 Patents(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