CN106038287A

CN106038287A - Disposable syringe having safety filter function

Info

Publication number: CN106038287A
Application number: CN201610225420.9A
Authority: CN
Inventors: 高钟元
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-04-17
Filing date: 2016-04-12
Publication date: 2016-10-26
Anticipated expiration: 2036-04-12
Also published as: KR101532413B1; CN106038287B

Abstract

According to the present invention, a disposable syringe having a safety filter function comprises: a storage space; a cylinder; a plunger enabling an injection to flow into and be discharged from the cylinder; and an injection needle wherein a needle is fixedly installed on a front end of a hub. The disposable syringe having a safety filter function more comprised: an entry and exit rib formed in an upper end portion of an inner side of a neck; a fixing hole formed to penetrate the center of the entry and exit rib; a plurality of circulation holes penetration-formed along a circumference of the fixing hole; and a safety filter unit fixedly installed in an upper side of the entry and exit rib.

Description

There is the disposable syringe of safety filtering function

Technical field

The present invention relates to a kind of disposable syringe with safety filtering function, more specifically, Relate to by forming turnover muscle in the inner top side portion of the cervical region being located at cylinder lower end, and possess logical Cross and be formed through the safety filtering unit that the fixing hole at described turnover muscle center is fixedly installed Prevent at the note injection of the inner containment of ampoule or phial etc. being sucked and being injected into patient During penetrating, the foreign body such as glass particle is injected into, meanwhile, by ampoule or pipe together with injection The injection of inner containment of bottle etc. sucks and is injected in the injection process of patient without replacing Injection needle and only use single injection needle, with can be safe and simple realize injection filtered The disposable syringe with safety filtering function of injection process of injection.

Background technology

It is said that in general, mostly syringe is for putting into medicine in human body.

Fig. 1 be the injection being shown through making in ampoule flow into use according to existing skill The schematic diagram of the use state of the disposable syringe of art, Fig. 2 is for being shown through making in phial Injection flow into the use state of the disposable syringe according to prior art that uses Schematic diagram.

As shown in Figures 1 and 2, conventional syringe have employed once to prevent infection to wait Property syringe.

It addition, with reference to Fig. 1, include according to the disposable syringe 1 of prior art: syringe Main body 10, this syringe body 10 is formed with that the receiving space opened below makes can inside it To store injection；Piston portion 30, this piston portion 30 is inserted into described syringe body 10 Receiving space in so that injection can be absorbed into inside or the note of syringe body 10 Penetrate liquid to be discharged from the inside of syringe body 10；And injection needle 20, this injection needle 20 Being made up of with syringe needle 22 joint portion 25, described joint portion 25 Intercalation is to being located at described note The connecting portion 15 of the leading section of emitter main body 10, described syringe needle 22 is from described joint portion 25 Leading section extends, so as to be inserted into human body.

In order to use disposable syringe 1 as above patient to be injected injection, first Need to introduce injection in syringe body 10.

Now, will be stored in the injection in injection bottle to be flowed in syringe body 10. Described injection bottle is divided into ampoule 40 as shown in Figure 1 and phial (vial) as shown in Figure 2 70, described ampoule 40 is made up of glass material and is constituted with one-piece type, its upper part 43 in Thin shape, described phial 70 is made up of glass material, and its inlet part passes through rubber seal Pad 71 sealing.

That is, it is made up of glass material and during with integrated ampoule 40 using, Yong Huyong The degree that the upper part 42 of ampoule 40 is applied not make it rupture by finger or other instruments Impact, then makes upper part 42 hypsokinesis with the part applying impact for starting point, such that it is able to Realize cutting off upper part.

If as above syringe needle 22 part of injection needle 20 is immersed in the injection within ampoule 40 State under piston portion 30 is pulled back, then injection 60 is flowed into by injection needle 20 In the receiving space of syringe body 10.

It addition, when to use the injection being contained in described phial 70, if at injection needle Pushing syringe under the state that syringe needle 22 fore-end of 20 contacts with rubber gasket 71, The state that then the through rubber gasket of syringe needle 22 71 and being in is immersed in injection, then will Piston portion 30 pulls back, thus is drawn into by injection in syringe body 10.

If as it has been described above, the syringe needle 22 at the disposable syringe 1 that will be equipped with injection inserts After the health of patient, piston portion 30 is promoted forward, be then infused in syringe body 10 Injection 60 is discharged by the syringe needle 22 of injection needle 20, thus realizes the note to patient Enter.

But, it is introduced to syringe making the injection being as above contained in ampoule 40 or phial 70 Time in main body 10, it is necessary to need to be immersed in ampoule 40 or pipe in a part for injection needle 20 Injection is sucked under state in bottle 70.

Therefore, the fine glass particle K occurred when cutting off described ampoule 40 and injection one Rise and be drawn in syringe, thus cause the glass particle K that includes together with injection 60 The problem being expelled to patient.

Further, in the case of described phial 70, syringe needle 22 is forced to pierce through through rubber seal Pad 71, the described rubber gasket 71 when described syringe needle 22 through described rubber gasket 71 The rubbery chip being torn and produce is flowed in syringe needle 22, thus the passage of syringe needle 22 is blocked Live, or, will to patient's injection injection liquid time, there is the rubber being inserted in syringe needle 22 The rubbery chip of sealing gasket 71 is injected into problem in the patient together with injection.

More specifically, in the case of described ampoule 40, use syringe people (nurse, Doctor etc.) upper part 42 of the ampoule 40 made with vial is applied certain impact after, The upper part 42 that fractures makes upper part 42 be in cut-off state, by injection needle 20 Syringe needle 22 by the inside being inserted partially into ampoule 40 opened because of cut-out so that injection Liquid 60 is inhaled in syringe body 10.

But, when cutting off the upper part of ampoule 40, occur with the naked eye cannot in cutting portion The finest glass particle K confirmed, a portion drops to the outside of ampoule 40, Remainder drops to the inside of ampoule 40 and is deposited in injection 60.

Therefore, the syringe needle 22 at described injection needle 20 is immersed in injection 60 Suck injection 60 time, the fine glass particle K being deposited in injection 60 the most together by Suck.And, right under the state during as above injection 60 is inhaled into disposable syringe 1 When patient injects injection 60, the most straight containing the fine glass particle K in injection 60 Connect the health being injected into patient.

Further, when the injection in phial 70 is drawn in syringe, such as Fig. 2 institute Show, suck injection when the syringe needle 22 through rubber gasket of injection needle, this The outer peripheral portion of the syringe needle 22 of Shi Suoshu injection needle is forced to pierce through through rubber gasket 71.

As it has been described above, described rubber is close when described syringe needle 22 through described rubber gasket 71 The rubbery chip that packing 71 is torn and produces is flowed in the syringe needle 22 of injection needle, thus The passage of syringe needle 22 is plugged, to cause hindering injection to be successfully inhaled in syringe Problem.

Meanwhile, will to patient's injection injection liquid time, be inserted into the syringe needle of injection needle The rubbery chip of the rubber gasket 71 in 22 is injected into feelings in the patient together with injection Condition is because as above the rubbery chip of rubber gasket 71 is flowed into the internal of patient, the most right The health of patient causes fatal negative effect.

As the technology developed for solving the problems referred to above, it has been proposed that by glass can be filtered It is contained in the filter of glass granule in injection needle or syringe body to containing at injection In glass particle carry out the technology that filters.

But, according to above-mentioned technology, when injection is drawn in syringe, can filter Containing in injection such as foreign bodies such as glass particles, but, be inhaled into patient is injected During injection in syringe, injection by filter, therefore exists by described filtration again The problem that the glass particle that device is filtered is injected into patient together with injection.

In order to solve the problems referred to above, patent documentation 1 (Korean granted patent the 981586th, Grant date: 2010.09.03.) disclose by distinguishing suction when built with filter The injection suction injection needle of the injection in ampoule and to be directly inserted into patient body Mode injection is injected into what the injection needle of patient carried out using according to use Technology.

But, in this case, using the user of syringe to pass through will be built with filter Injection suction injection needle be inserted into syringe body injection be drawn into injection After device main body, discarded described injection suction injection needle, then by being inserted into trouble The injection needle of the health of person is inserted into syringe body and patient is injected injection, therefore deposits In problems such as injection process troubles.

Accordingly, it would be desirable to study and develop a kind of note in the inside by being contained in ampoule or phial etc. Penetrate to be injected in the injection process of patient after liquid sucks and be prevented from the foreign bodies such as glass particle and note Penetrating liquid to be injected into together, meanwhile, the injection in the inside by being contained in ampoule or phial etc. is inhaled It is injected in the injection process of patient after entering and only uses single injection without changing injection needle Syringe needle, has safety with can realize the injection process of injection that injection filtered simply The disposable syringe of filtering function.

Prior art literature

Patent documentation

(patent documentation 0001) Korean granted patent the 981586th (grant date: 2010.09.03.)

Summary of the invention

(1) to solve the technical problem that

In order to solve the problems referred to above, it is an object of the invention to provide and there is safety filtering function Disposable syringe, this has the disposable syringe of safety filtering function by being located at cylinder The inner top side portion of the cervical region of lower end forms turnover muscle, and possess by be formed through described enter The safety filtering unit that the fixing hole at Chu Jin center is fixedly installed prevents by ampoule or phial Deng the injection of inner containment suck and be injected into glass particle etc. in the injection process of patient Foreign body is injected into together with injection.

Meanwhile, it is by the cervical region being located at cylinder lower end according to the purpose of the technology of the present invention Inner top side portion form turnover muscle, and possess by being formed through at described turnover muscle center The safety filtering unit that fixing hole is fixedly installed comes by the inner containment of ampoule or phial etc. Injection sucks and is injected in the injection process of patient and only uses without changing injection needle Single injection needle, with can be safe and simple realize the injection of injection that injection is filtered Journey.

(2) technical scheme

In order to achieve the above object, the present invention is constituted as follows.That is, according to the present invention, there is peace The disposable syringe of full filtering function is made up of cylinder, piston and injection needle, and its feature exists In, described cylinder is formed with the receiving space opened above and makes injection be stored in described cylinder In and include the cervical region highlighting formation from the lower center of described cylinder with certain length, described work Fill in and be inserted into from lower end by the open portion of described cylinder and by lifting action optionally Making injection flow in or out described cylinder, described injection needle is by optionally combining admittedly It is fixedly installed syringe needle due to the front end of the needle stand of the described cervical region of described cylinder to form, and is located at institute The inner top side portion of the described cervical region stating cylinder bottom is formed with turnover muscle, described turnover muscle Through is formed with fixing hole, and the circumference along described fixing hole has been formed through multiple circulation Hole, and described disposable syringe also includes safety filtering unit, this safety filtering unit is fixed It is arranged on the upside of described turnover muscle so that have injection ampoule or the pipe of injection from inner containment After injection containing foreign body is flowed into the inside of described cylinder by bottle, foreign body is filtered, So as the injection the filtered pressurization by described piston the institute by described injection needle State syringe needle and be injected into the health of patient.

Here, preferably, described safety filtering unit includes: turnover valve, this turnover valve is fixed It is arranged on above described turnover muscle so that the described stream that the inner space to described cylinder is opened Through hole carries out sealing and described opening optionally can be opened, and this turnover valve includes flowing into Prerotation vane, described inflow prerotation vane expands outwardly from the outboard end of main body so that described inflow is led It is adjacent to, in described main body from the inside bottom surface of described turnover muscle upper end to described cylinder to sheet The heart is formed through fixing cave and is formed with multiple stream from the outer circumference along described fixing cave Go out cave；Filter, this filter be centrally formed with through hole, the bottom surface of this filter is adjacent to set Put above the described main body of described turnover valve, pass through institute to when described inflow prerotation vane is open State opening to be flowed into the injection containing foreign body of described cylinder interior and filter so that institute State the foreign body quilt being contained within when injection through described opening and flows out to described injection needle Filter and flow out；And fixture, this fixture is by being formed at the described main body of described turnover valve The described of the described fixing cave at center, the described through hole of described filter and described turnover muscle is fixed Hole is combined so that described turnover valve and filter are fixedly installed on the upside of described turnover muscle.

Now, it is preferable that the described main body of described turnover valve has a certain size and makes described master The outboard end of body is positioned at the core of described opening and is formed as than described inflow prerotation vane Thickness thicker, described inflow prerotation vane is formed as the limber board thinner than the thickness of described main body Shape the outboard end that make described inflow prerotation vane one-body molded with described main body are the most past Upper tilting certain angle, in order to the side part by described opening of the injection containing foreign body It is flowed into the inside of described cylinder, and the injection that foreign body is filtered passes through described from described cylinder The other side lease making of opening is crossed described opening and is flowed out at described injection needle.

And, it is preferable that described turnover valve and described filter are fixedly installed by described fixture In the upside of described turnover muscle, and described fixture includes: head, and this head is formed as having The area bigger than the described via area of described filter and there is certain thickness, in order to support Above the described through hole circumference of described filter；Extension, this extension is from described head bottom surface Extend certain length, and from the lower end of this extension up with certain length be divided into multiple so that Core at this extension has elastic deformation space；And hook portion, this hook portion is prolonged with described Each lower end that the segmentation of extending portion is formed is facing and outwardly.

Furthermore it is preferred that described filter is reticular pattern or the non-woven fabric type with microgrid, The injection that foreign body is filtered flows out to described note from described cylinder through described opening Penetrate at syringe needle.

And, it is preferable that described opening is formed through as many along the circumference of described fixing hole Individual, and to be formed through along the circumference of described fixing hole be 4 or 2.

(3) beneficial effect

The disposable syringe with safety filtering function according to the present invention has the effect that

First, by forming turnover muscle in the inner top side portion of the cervical region being located at cylinder lower end, and Possesses the safety filtering being fixedly installed by the fixing hole being formed through at described turnover muscle center Unit prevents from being sucked by the injection of the inner containment of ampoule or phial etc. and being injected into trouble In the injection process of person, the foreign body such as glass particle is injected into together with injection.

Secondly, by forming turnover muscle in the inner top side portion of the cervical region being located at cylinder lower end, and Possesses the safety filtering being fixedly installed by the fixing hole being formed through at described turnover muscle center The injection of the inner containment of ampoule or phial etc. is being sucked and is being injected into patient's by unit In injection process, from the most different, it is not necessary to change injection needle and only use single injection needle, With can be safe and simple realize the injection process of injection that injection filtered there is safety The disposable syringe of filtering function.

Accompanying drawing explanation

Fig. 1 be the injection being shown through making in ampoule flow into use according to existing skill The schematic diagram of the use state of the disposable syringe of art.

Fig. 2 be the injection being shown through making in phial flow into use according to existing skill The schematic diagram of the use state of the disposable syringe of art.

Fig. 3 is to illustrate the disposable syringe with safety filtering function according to the present invention Isolating construction figure.

Fig. 4 is to illustrate the disposable syringe with safety filtering function according to the present invention Major part sectional structure chart.

Fig. 5 is to illustrate the disposable syringe with safety filtering function according to the present invention The isolating construction figure of the safety filtering unit of major part.

Fig. 6 is to be shown in use the disposable note with safety filtering function according to the present invention During emitter injection, make the use state signal of the step that injection is flowed in cylinder Figure.

Fig. 7 is to be shown in use the disposable note with safety filtering function according to the present invention During emitter injection, by the injection being flowed in cylinder is flowed out at injection needle Carry out the use view of the step of the internal injection injection to patient.

Description of reference numerals

100: cylinder

110: cervical region

120: turnover muscle

121: fixing hole

125: opening

200: piston

300: injection needle

310: needle stand

320: syringe needle

500: safety filtering unit

510: turnover valve

511: main body

512: fixing cave

513: flow out cave

515: flow into prerotation vane

530: filter

531: through hole

550: fixture

551: head

553: extension

555: hook portion

Detailed description of the invention

Below, referring to the drawings to the disposable injection according to the present invention with safety filtering function The preferred embodiment of device is described in detail.

Fig. 3 is to illustrate the disposable syringe with safety filtering function according to the present invention Isolating construction figure, Fig. 4 is to illustrate the disposable note with safety filtering function according to the present invention The major part sectional structure chart of emitter, Fig. 5 is to illustrate to have safety filtering according to the present invention The isolating construction figure of the safety filtering unit of the major part of the disposable syringe of function.

Fig. 6 is to be shown in use the disposable note with safety filtering function according to the present invention During emitter injection, make the use state signal of the step that injection is flowed in cylinder Figure, Fig. 7 is to be shown in use the disposable injection with safety filtering function according to the present invention During device injection, by flowing out to the injection being flowed in cylinder come at injection needle Use view to the step of the internal injection injection of patient.

As shown in Fig. 3 to Fig. 7, in the same manner as common disposable syringe, according to the present invention The disposable syringe with safety filtering function of preferred embodiment by cylinder 100, piston 200 and injection needle 300 constitute, described cylinder 100 is formed with the receiving space opened above Injection is made to be stored in the inside of described cylinder 100 and include the lower end from described cylinder 100 Center highlights the cervical region 110 of formation with certain length, and described piston 200 is by described cylinder 100 Open portion be inserted into from lower end and by lifting action optionally make injection flow into or Flowing out described cylinder 100, described injection needle 300 is by being fixed on institute in optionally combination The front end of the needle stand 310 stating the described cervical region 110 of cylinder 100 is fixedly installed syringe needle 320 and forms.

Especially, so constitute according to a preferred embodiment of the invention there is safety filtering function Disposable syringe in, be located at the inner side of the described cervical region 110 of described cylinder 100 bottom Upper end is formed with turnover muscle 120, and the through of described turnover muscle 120 is formed with fixing hole 121, the circumference along described fixing hole 121 has been formed through multiple opening 125.

Now, it is preferable that described opening 125 is through along the circumference of described fixing hole 121 Be formed as multiple, and to be formed through along the circumference of described fixing hole 121 be 4 or 2.

That is, described opening 125 can along the circumference of described fixing hole 121 be formed through into Multiple holes of more than at least 2.

It addition, the disposable syringe as above with safety filtering function makes to hold from inside Receive the injection ampoule of injection or the injection containing foreign body is flowed into described circle by phial Behind the inside of cylinder 100, foreign body is filtered, in order to the injection filtered is by described work Fill in the pressurization of 200 and be injected into the body of patient by the syringe needle 320 of described injection needle 300 Body.

To this end, also include peace according to the disposable syringe with safety filtering function of the present invention Full filter element 500, this safety filtering unit 500 is fixedly installed on described turnover muscle 120 Side.

Now, described safety filtering unit 500 includes passing in and out valve 510, filter 530 and consolidating Locking member 550.

More specifically, described turnover valve 510 be fixedly installed on above described turnover muscle 120 with Just the described opening 125 opened the inner space to described cylinder 100 carries out sealing and makes Described opening 125 optionally can open.

In other words, it is preferably that described turnover valve 510 includes flowing into prerotation vane 515, described Flow into prerotation vane 515 to expand outwardly from the outboard end of main body 511 so that described inflow prerotation vane 515 inside bottom surface from described turnover muscle 120 upper end to described cylinder 100 are adjacent to, described The through of main body 511 is formed with fixing cave 512 and from along described fixing cave 512 Side circumference is formed with multiple outflow cave 513.

Now, it is preferable that in described main body 511, described outflow cave 513 is along described solid The outer circumference determining cave 512 is formed through as multiple, and passes through accordingly with described opening 125 Lead to and be formed as 4 or 2.

It addition, turnover valve 510 directly connects with the injection being injected in the patient as above Touch, and, so that be flowed into described inflow prerotation vane 515 is applied to injection The outboard end of prerotation vane 515 is flowed into described in the situation of feed pressure when described cylinder 100 is internal Can flexibly tilt, turnover valve 510 is preferably made up of soft silicone material.

Further, described filter 530 be centrally formed with through hole 531, described filter 530 Bottom surface become placed against above the described main body 511 of described turnover valve 510.

Described filter 530 is to passing through described opening when described inflow prerotation vane 515 is open 125 are flowed into the injection containing foreign body within described cylinder 100 filters so that institute State include when injection through described opening 125 and flows out different to described injection needle 300 Thing is filtered and is flowed out.

Now, it is important that the injection that described filter 530 makes foreign body be filtered is from described Cylinder 100 flows out at described injection needle 300 through described opening 125, therefore, and institute State filter 530 and preferably there is the netted of microgrid or non-woven fabric type.

Certainly, in order to make filter effect maximize, described filter 530 can be have fine Mesh netted, meanwhile, may also include nonwoven fabric filter, paper filter etc. various inside it Filter element.

It addition, described fixture 550 is by being formed at the described main body of described turnover valve 510 The described fixing cave 512 at 511 centers, the described through hole 531 of described filter 530 and described The described fixing hole 121 of turnover muscle 120 is combined.

Thus, described turnover valve 510 and described filter 530 are fixed by described fixture 550 It is arranged on the upside of described turnover muscle 120.

Furthermore it is preferred that described fixture 550 is by described turnover valve 510 and described filter 530 are fixedly installed on the upside of described turnover muscle 120, and include head 551, extension 553 And hook portion 555.

Now, described head 551 is formed as having the described through hole than described filter 530 Area that 531 areas are bigger and there is certain thickness, in order to support the institute of described filter 530 State above through hole 531 circumference.

Further, described extension 553 from described head 551 bottom surface extend certain length, and from The lower end of described extension 553 is up divided into multiple so that in described extension with certain length The core in portion 553 has elastic deformation space.Described hook portion 555 and described extension Each lower end that the segmentation of 553 is formed is facing and outwardly.

In addition, it is important that, according to the present invention, there is safety filtering function as above Disposable syringe makes the side part by described opening 125 of the injection containing foreign body It is flowed into the inside of described cylinder 100, and the injection that foreign body is filtered is from described cylinder 100 Cross described opening 125 by the other side lease making of described opening 125 and flow out to described note Penetrate at syringe needle 300.

It is therefore preferred that the main body 511 of described turnover valve 510 has a certain size and makes it Outboard end is positioned at the core of described opening 125 and is formed as than described inflow prerotation vane The thickness of 515 is thicker, and described inflow prerotation vane 515 is formed as the thickness than described main body 511 Thinner soft tabular is the most one-body molded with described main body 511 so that described inflow prerotation vane The outboard end of 515 the most up tilts certain angle.

As it has been described above, according to the disposable syringe with safety filtering function of the present invention, logical Cross and form turnover muscle 120 in the inner top side portion of the cervical region 110 being located at cylinder 100 lower end, and Possesses the peace being fixedly installed by the fixing hole 121 being formed through at described turnover muscle 120 center Full filter element 500 is stable against in the injection by the inner containment of ampoule or phial etc. Liquid suck and be injected in the injection process of patient the foreign body such as glass particle together with injection by Inject.

Meanwhile, by formed in the inner top side portion of the cervical region 110 being located at cylinder 100 lower end into Go out muscle 120, and possess by being formed through the fixing hole 121 at described turnover muscle 120 center The safety filtering unit 500 being fixedly installed, from the most different, by ampoule or phial etc. The injection that portion accommodates sucks and is injected in the injection process of patient without changing injection needle And only use single injection needle, with can be safe and simple realize the injection that filtered of injection The disposable syringe with safety filtering function of injection process.

It addition, only use single injection needle without changing injection needle, with can safely letter Singly realize the injection process of injection that injection is filtered, thus, and by by injection needle Change after being divided into the injection needle for filtering and filtering for the health of patient is injected note The injection needle penetrating liquid additionally manufactures and uses the prior art difference of two kinds of injection needles, logical Cross and only use single injection needle to significantly reduce the manufacturing cost of disposable syringe.

To sum up, the specific embodiment of the present invention is described in detail, but the present invention non-limiting In this, on the premise of without departing from the thought of claim and field, the technology in field of the present invention Personnel can implement with various modal alterations, and, so deformation should be interpreted a belonging to this Within bright category.

Claims

1. there is a disposable syringe for safety filtering function, by cylinder 100, piston 200 and injection needle 300 constitute, it is characterised in that described cylinder 100 is formed and opens above The space that accommodates put makes injection be stored in the inside of described cylinder 100 and include from described The lower center of cylinder 100 highlights the cervical region 110 of formation, described piston 200 with certain length It is inserted into and by lifting action selectivity from lower end by the open portion of described cylinder 100 Make injection flow in or out described cylinder 100, described injection needle 300 is by selecting Property ground combine the front end of needle stand 310 of the described cervical region 110 being fixed on described cylinder 100 and fix Arrange syringe needle 320 to form,

And the inner top side portion being located at the described cervical region 110 of described cylinder 100 bottom is formed Turnover muscle 120, the through of described turnover muscle 120 is formed with fixing hole 121, along institute The circumference stating fixing hole 121 has been formed through multiple opening 125,

And described disposable syringe also includes safety filtering unit 500, this safety filtering unit 500 are fixedly installed on the upside of described turnover muscle 120 so that have the note of injection from inner containment After penetrating the inside that the injection containing foreign body is flowed into described cylinder 100 by liquid ampoule or phial, Foreign body is filtered, in order to the injection filtered is by the pressurization of described piston 200 and leads to The syringe needle 320 crossing described injection needle 300 is injected into the health of patient,

And described safety filtering unit 500 includes:

Turnover valve 510, this turnover valve 510 be fixedly installed on above described turnover muscle 120 so that The described opening 125 opening the inner space to described cylinder 100 seals so that Described opening 125 optionally can open, and this turnover valve 510 includes flowing into prerotation vane 515, described inflow prerotation vane 515 expands outwardly from the outboard end of main body 511 so that described Flow into the prerotation vane 515 inside bottom surface from described turnover muscle 120 upper end to described cylinder 100 Being adjacent to, the through of described main body 511 is formed with fixing cave 512 and from along described fixing The outer circumference in cave 512 is formed with multiple outflow cave 513；

Filter 530, this filter 530 be centrally formed with through hole 531, this filter 530 Bottom surface become placed against above the described main body 511 of described turnover valve 510, at described stream Enter when prerotation vane 515 opens and be flowed within described cylinder 100 by described opening 125 Injection containing foreign body filters so that described injection is through described opening 125 also The foreign body being contained within when described injection needle 300 flows out is filtered and is flowed out；And

Fixture 550, this fixture 550 is by being formed at the described master of described turnover valve 510 The described fixing cave 512 at body 511 center, the described through hole 531 of described filter 530 and institute The described fixing hole 121 stating turnover muscle 120 is combined so that described turnover valve 510 and institute State filter 530 to be fixedly installed on the upside of described turnover muscle 120.

The disposable syringe with safety filtering function the most according to claim 1, It is characterized in that,

The described main body 511 of described turnover valve 510 has a certain size and makes described main body 511 Outboard end be positioned at the core of described opening 125 and be formed as guiding than described inflow The thickness of sheet 515 is thicker, and described inflow prerotation vane 515 is formed as than described main body 511 Soft tabular that thickness is thinner also one-body molded with described main body 511 makes described inflow guide The outboard end of sheet 515 the most up tilts certain angle, in order to containing the injection of foreign body The inside of described cylinder 100, and foreign body it is flowed into by the side part of described opening 125 The injection filtered passes through the other side lease making of described opening 125 from described cylinder 100 Cross described opening 125 to flow out at described injection needle 300.

Described turnover valve 510 and described filter 530 are fixedly installed on by described fixture 550 The upside of described turnover muscle 120,

And described fixture 550 includes:

Head 551, this head 551 is formed as having the described through hole than described filter 530 Area that 531 areas are bigger and there is certain thickness, in order to support the institute of described filter 530 State above through hole 531 circumference；

Extension 553, this extension 553 extends certain length from described head 551 bottom surface, And up it is divided into multiple so that in this extension with certain length from the lower end of this extension 553 The core in portion 553 has elastic deformation space；And

Hook portion 555, this hook portion 555 splits, with described extension 553, each lower end formed Face one another and outwardly.

Described filter 530 is reticular pattern or the non-woven fabric type with microgrid so that foreign body The injection filtered flows out to described injection from described cylinder 100 through described opening 125 At syringe needle 300.

Described opening 125 is formed through as multiple along the circumference of described fixing hole 121, and It is 4 or 2 that circumference along described fixing hole 121 is formed through.