A kind of plug-in membrane filtration medical needleTechnical field
The present invention relates to medical apparatus technical field, specially a kind of plug-in membrane filtration medical needle.
Background technology
In medical domain clinical nursing activity dilute and aspirate ampoule solution always use No. 16 syringe needles, the syringe needle be byThe needle stalk and pintle composition that can be connected together, and with interconnected access way.But have when it is used as followsDisadvantage：Since the bottle stopper of medicine powder is all made of rubber, this rubber plug brittleness is larger, can go out when being punctured with No. 16 syringe needlesSome existing finding of naked eye and invisible rubber particle, also inevitably various particles mix during preparing ampouleEnter.To be entered the health for seriously endangering patient into the human body in liquid possibly together entrainment of these impurity.
Invention content
It is an object of the invention to overcome above-mentioned technical problem, a kind of plug-in membrane filtration medical needle is provided, can be hadEffect avoids impurity from bringing harm into human body together with liquid.
To achieve the above object, the present invention provides the following technical solutions：
A kind of plug-in membrane filtration medical needle, including needle stand, casing and the syringe needle being fixed on casing, the syringe needleInside be hollow liquid-passing hole, one end of the syringe needle is located in described sleeve pipe, is equipped between described sleeve pipe and the needle standFilter membrane, the needle stand and described sleeve pipe are interconnected to form the cavity with entrance and exit, and the filter membrane is by the skyChamber is separated into front and back two parts, and the outer edge of described sleeve pipe and the needle stand closed position is coated with cladding circle.
Further, the edge of one end that described sleeve pipe is connect with the needle stand is equipped with protrusion, the opening edge of the needle standClosely agree in the edge insertion protrusion and with described sleeve pipe, the cladding circle is annular construction member, by described sleeve pipe and the needleSeat agrees with position cladding closely.
Further, the edge of one end that the needle stand is connect with described sleeve pipe is equipped with protrusion, the opening edge of described sleeve pipeClosely agree in the edge insertion protrusion and with the needle stand, the cladding circle is annular construction member, by described sleeve pipe and the needleSeat agrees with position cladding closely.
Further, the inside contact surface that the needle stand and described sleeve pipe are in contact is arcwall face, the needle stand and instituteThe arcwall face for stating casing fastens to form arc-shaped cavity, and the filter membrane is arranged in the arc-shaped cavity.
Further, the arcwall face is equipped with the particle of spot distribution, is located at the particle on the needle stand and positionArrangement is corresponded in the particle in described sleeve pipe, the filter membrane is clamped in the arc-shaped cavity by the particle.
Further, it is located at the height of the height and the particle in described sleeve pipe of the particle on the needle standIt spends identical.
Further, the needle stand, described sleeve pipe and cladding circle are polypropylene structural member.
Compared with prior art, beneficial effects of the present invention are as follows：
1. a kind of plug-in membrane filtration medical needle of the present invention is provided with cladding in needle stand and casing connection position and encloses,Needle stand and casing are closely pressed against by cladding circle, and have the effect of preventing explosion from revealing, greatly strengthen syringe needle withThe ability for bearing pressure of casing filtering.
2. a kind of plug-in membrane filtration medical needle of the present invention, simple and reasonable, of low cost, and filter effectGood, general applicability is strong, can be effectively prevented impurity into the liquid, reduction pollution, it is ensured that the safety being infused to human body.
Description of the drawings
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of the embodiment of the present invention 2.
In figure：1 needle stand, 2 casings, 3 syringe needles, 4 liquid-passing holes, 5 filter membranes, 6 entrances, 7 outlets, 8 cladding circles, 9 protrusions, 10 arcsShape cavity, 11 particles.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, completeSite preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based onEmbodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every otherEmbodiment shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figure 1, a kind of plug-in membrane filtration medical needle, including needle stand 1, casing 2 and it is fixed on casingThe inside of syringe needle 3, syringe needle 3 is hollow liquid-passing hole 4, and one end of syringe needle 3 is located in casing 2, is equipped between casing 2 and needle stand 1Filter membrane 5, needle stand 1 is interconnected to form the cavity with entrance 6 and outlet 7 with casing 2, before cavity is separated by filter membrane 5The outer edge of two parts afterwards, casing 2 and 1 closed position of needle stand is coated with cladding circle 8.Needle stand 1, casing 2 and cladding circle 8 are poly-Propylene component.
The edge of one end that casing 2 is connect with needle stand 1 is equipped with protrusion 9, in the open edge of needle stand 1 insertion protrusion 9 and withCasing 2 closely agrees with, and cladding circle 8 is annular construction member, and the position of agreeing with of casing 2 and needle stand 1 is coated closely.
The inside contact surface that needle stand 1 and casing 2 are in contact is arcwall face, and the arcwall face of needle stand 1 and casing 2 fastens to be formedArc-shaped cavity 10, filter membrane 5 are arranged in arc-shaped cavity 10.
Arcwall face is equipped with the particle 11 of spot distribution, is located at the height of the particle 11 on needle stand 1 and on casing 2The height of particle 11 is identical.Particle 11 on needle stand 1 and the particle 11 on casing 2 correspond to arrangement, particle 11 incited somebody to actionFilter membrane 5 is clamped in arc-shaped cavity 10.
Embodiment 2
As shown in Fig. 2, the present embodiment difference from example 1 is that, the side of one end that needle stand 1 is connect with casing 2Edge is equipped with protrusion 9, closely agrees in the open edge insertion raised 9 of casing 2 and with needle stand 1, coats circle 8 by casing 2 and needle stand 1To agree with position cladding close.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be withUnderstanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replaceAnd modification, the scope of the present invention is defined by the appended.