CN203303435U

CN203303435U - Novel pen type remaining needle

Info

Publication number: CN203303435U
Application number: CN2013203059722U
Authority: CN
Inventors: 杨舟
Original assignee: ZHEJIANG KANGTAI MEDICAL DEVICES CO Ltd
Current assignee: ZHEJIANG KANGTAI MEDICAL DEVICES CO Ltd
Priority date: 2013-05-15
Filing date: 2013-05-15
Publication date: 2013-11-27
Anticipated expiration: 2023-05-15

Abstract

The utility model relates to a novel pen type remaining needle. An elastic shaft is arranged in a sleeve seat, the effect of automatically sealing the sleeve seat when a needle is withdrawn can be reached, and the high-difficulty operation of manually pressing the head end of a sleeve for preventing the blood from backward flowing before the needle withdrawal of the traditional pen type remaining needle is avoided. The telescopic effect of an elastic shaft can be utilized so that the sleeve seat can be directly matched with an infusion cone head, the addition of the additional infusion pipeline like a y-shaped remaining needle is not needed, and the blood return caused by additional infusion pipeline extrusion of the y-shaped remaining needle can be avoided. In conclusion, the novel pen type remaining needle has the advantages that the structure is simple and compact, the production is convenient, the advantages of the pen type remaining needle and the advantages of the y-shaped remaining needle are simultaneously realized, the defects of the novel pen type remaining needle and the y-shaped remaining needle can also be avoided, and the positive pressure pipe sealing performance can also be provided.

Description

The Novel pen type remaining needle

Technical field

This utility model relates to a kind of medical supplies, is specially the Novel pen type remaining needle.

Background technology

Remaining needle is divided into two kinds, pen type and y type.

The pen type containing needle structure is simple, but complete puncture while pulling out needle tubing, owing to from sleeve pipe and casing seat inside, pulling out needle tubing and needle stand, cause the casing seat inner chamber directly with atmosphere, to be communicated with, cause blood back and pollution, before therefore require, pulling out needle tubing, must press with hands the head end of sleeve pipe, because the sleeve pipe head end is positioned at blood vessel, this operation easier is very high, or causes blood back by not living the sleeve pipe head end, press overweightly, cause needle tubing to scratch blood vessel.

Y type remaining needle has well solved this problem, namely sealing arranges resilient plug in casing seat, needle tubing passes resilient plug and enters sleeve pipe again, in case pull out needle tubing and needle stand, space after resilient plug self-closed needle tubing is pulled out, casing seat continues to keep air-tight state, there is no blood back and pollution risk, without press sleeve tube head end.But due to the obstruction of resilient plug, casing seat can't must additionally increase an extrusion infusing pipeline as the infusion interface, forms the trifid structure of y type.Y type remaining needle, except complex structure, also has a critical defect, in case after tube sealing, newly-increased extrusion infusing pipeline easily is subject to various extruding, in extruding in pipeline residual medicinal liquid enter human body, after extruding recovered, blood reflux entered sleeve pipe, form the thrombotic plugging, cause remaining needle to be scrapped.And current popular positive pressure connector technology, sleeve pipe was interior without blood back at that time also can only to guarantee tube sealing, can't prevent follow-up pipeline extruding property blood back at all.

The utility model content

For the problems referred to above, the purpose of this utility model is to provide a kind of Novel pen type remaining needle, by elastic shaft, replace resilient plug, not only avoid pulling out the pin blood back, can also directly from casing seat, carry out infusion by the extruding elastic shaft, without increasing extra extrusion infusing pipeline, avoid being squeezed property of the pipeline blood back of y type remaining needle.

For achieving the above object, be achieved through the following technical solutions:

The Novel pen type remaining needle, comprise sheath, sleeve pipe, casing seat, needle tubing, needle stand and elastic shaft etc., it is characterized in that: described needle tubing enters cannula cavity after passing elastic shaft, needle tubing and elastic shaft are sealed and matched, and after pulling out, elastic shaft produces elastic deformation, the hole that the self-closed needle tubing stays; Elastic shaft coordinates with the port sealing of casing seat, but retraction casing seat after compression, no longer with casing seat sealing, but resilience reseal the casing seat port after freely discharging.

Described elastic shaft consists of axle core, axle housing and elastomer, and the axle core is positioned at axle housing inside, is provided with elastomer between the two.

The cavity that the volume increased after described elastic shaft resilience stays after being greater than and pulling out with the conehead of the supporting infusion of remaining needle, form the malleation in remaining needle while pulling out conehead, and while guaranteeing to pull out conehead, liquid is discharged from the sleeve pipe head end, avoids blood back.

Compared to existing technology, the utlity model has following advantage:

1, profile is succinct, there is no unnecessary y type bifurcated pipe, convenient fixing, the risk of not twisting together, the advantage of maintenance pen type remaining needle.

Without compressing sleeve pipe head end, simple to operate while 2, pulling out pin, avoided the greatest drawback of traditional pen type remaining needle.

3, rely on the stretching motion of built-in elastic axle, casing seat can directly coordinate with conehead and carry out infusion, without increase y type pipeline, there is no the be squeezed risk of blood back of pipeline.

Elastic shaft resilience while 4, pulling out conehead, produce the malleation in remaining needle, and liquid is discharged from the sleeve pipe head end, avoids the tube sealing blood back.

The accompanying drawing explanation

Fig. 1 is Novel pen type remaining needle overall schematic;

Fig. 2 is the pen type remaining needle schematic diagram of pulling out after needle tubing;

Fig. 3 is the pen type remaining needle schematic diagram of infusion state;

The specific embodiment

The utility model will be further described below in conjunction with accompanying drawing.

As shown in Figure 1, the Novel pen type remaining needle comprises sheath 1, sleeve pipe 2, casing seat 3, needle tubing 4, needle stand 5 and elastic shaft 6, needle tubing 4 enters sleeve pipe 2 inner chambers after passing elastic shaft 6, needle tubing 4 is sealed and matched with elastic shaft 6, elastic shaft 6 is sealed and matched with the port 31 of casing seat 3, elastic shaft 6 consists of axle core 61, axle housing 62 and elastomer 63, and axle core 61 is positioned at axle housing 62 inside, is provided with elastomer 63 between the two.

As shown in Figure 2, after pulling out needle tubing 4 and needle stand 5, needle tubing 4 stays on elastic shaft 6 space is by the elastic deformation self-closed of elastic shaft.

As shown in Figure 3, during infusion, conehead 7 inserts the port 31 of casing seat 3, and the axle core 61 of elastic shaft 6 is by the rear retraction casing seat 3 of conehead 7 extruding, and no longer with casing seat 3 sealings, elastomer 63 is compressed simultaneously.Now form the fluid passage shown in dotted line in figure, liquid flows out from conehead 7, from the gap horizontal mobility of conehead 7 and axle core 61, enters the gap between elastic shaft 6 and casing seat 3, then enters the front end of casing seat 3, finally enters sleeve pipe 2 until intravasation.

In case pull out conehead 7, elastomer 63 resiliences, make axle core 61 be returned to initial position, reseals with the port 31 of casing seat 3.Due to the volume increased after elastic shaft 6 resiliences, be greater than simultaneously the volume of conehead 7, in remaining needle, the volume of liquid chambers reduces, and forms malleation, and unnecessary liquid is discharged from sleeve pipe 2 head ends, avoids blood back.

Those of ordinary skill in the art should be realized that, above embodiment just is used for illustrating this utility model, but not conduct is to restriction of the present utility model, as long as in essence scope of design of the present utility model, all will drop in claim scope of the present utility model variation or the modification of above embodiment.

Claims

1. Novel pen type remaining needle, comprise sheath, sleeve pipe, casing seat, needle tubing, needle stand and elastic shaft, it is characterized in that: described needle tubing enters cannula cavity after passing elastic shaft, needle tubing and elastic shaft are sealed and matched, and after pulling out, elastic shaft produces elastic deformation, the hole that the self-closed needle tubing stays; Elastic shaft coordinates with the port sealing of casing seat, but retraction casing seat after compression, no longer with casing seat sealing, but resilience reseal the casing seat port after freely discharging.

2. Novel pen type remaining needle as claimed in claim 1, it is characterized in that: described elastic shaft consists of axle core, axle housing and elastomer, and the axle core is positioned at axle housing inside, is provided with elastomer between the two.

3. Novel pen type remaining needle as claimed in claim 1, it is characterized in that: the cavity that the volume increased after described elastic shaft resilience stays after being greater than and pulling out with the conehead of the supporting infusion of remaining needle, malleation when conehead is pulled out in formation in remaining needle, while guaranteeing to pull out conehead, liquid is discharged from the sleeve pipe head end, avoids blood back.