Single-use injector having a flexurally elastic housing

一种注射器、一次性的技术，应用在注射器、自动注射器、皮下注射器械等方向，能够解决昂贵制成等问题

Inactive Publication Date: 2011-11-16
LTS LOHMANN THERAPIE-SYST AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Apart from the mechanical spring of the spring accumulator, almost all components of the syringe are expensively produced from plastic by injection molding

Method used

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  • Single-use injector having a flexurally elastic housing
  • Single-use injector having a flexurally elastic housing
  • Single-use injector having a flexurally elastic housing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] figure 1 A disposable syringe with a permanently loaded spring accumulator is shown. The disposable syringe comprises a housing 200 surrounded by the trigger element 82 and the protective cap 120, a syringe / piston unit 100 for pre-filling, for example, with injection solution, a piston-operated plunger 60 and a spring accumulator. Helical compression spring 50. The syringe / piston unit 100 is largely located in the protective cap 120 here.

[0030] The housing 200 is a metal strip 201 that has been bent to form a "U" shape. The length of the sheet metal strip 201 , for example 18 mm wide, is about 240 mm. The sheet metal strip 201 , which may be produced from spring steel, has a wall thickness of, for example, 0.5 mm. The bent sheet metal strip 201 comprises a central end plate 210 and two sides 220 which protrude at least approximately perpendicularly from the end plate. The sides 220 , which are aligned at least partially parallel to one another, are bent inwardly...

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PUM

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Abstract

The invention relates to a single-use injector comprising a housing (200) accommodating a mechanical spring energy reservoir (50), a cylinder / piston unit (100), a piston-actuating ram (60) and a trigger unit (80), the spring-loaded piston-actuating ram being releasably supported on the housing. The housing of the injector consists of a thin-walled sheet metal part (201). The sheet metal part has at least two limbs (20). Each limb has a bent retaining element (221) or a recess on its free end. The limbs are elastic flexural beams the center sections of which are bent in the shape of a z or an s to define a supporting section (231) for the piston-actuating ram. The contact zone between an individual supporting section and the piston-actuating rod represents a wedge gear pairing that forces the respective limb outwards.

Description

technical field [0001] The invention relates to a disposable syringe comprising a housing in which or on which at least one mechanical spring accumulator, at least one injector capable of being at least temporarily filled with an active substance is arranged, at least locally. A barrel / piston unit, at least one piston-operated plunger, and at least one trigger unit, wherein the piston-operated plunger is positioned between the spring accumulator and the piston of the syringe / piston unit, wherein the spring accumulator comprises at least A pre-tensioned spring element, wherein the spring-loaded piston-operated plunger is detachably supported on the housing. Background technique [0002] Furthermore, a syringe of this type is known from DE 10 2007 031 630 A1. Apart from the mechanical spring of the spring energy store, almost all components of the syringe are expensively produced from plastic by injection molding. Components subjected to high mechanical loads are additionall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/30
CPCA61M2005/2013A61M5/2033A61M2005/312A61M5/30A61M2005/2073A61M5/20A61M5/3129A61M5/50
Inventor R·马图施
Owner LTS LOHMANN THERAPIE-SYST AG
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