CN106038287B

CN106038287B - disposable syringe with safety filtering function

Info

Publication number: CN106038287B
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: 2018-10-19
Anticipated expiration: 2036-04-12
Also published as: CN106038287A; KR101532413B1

Abstract

The present invention relates to a kind of disposable syringes with safety filtering function.The purpose of the present invention is to provide by forming disengaging muscle in the inner top side portion of the neck set on cylinder lower end, and has and prevent from being injected together with injection sucking the injection of the inner containment of ampoule or phial etc. and be injected into the foreign matters such as glass particle in the injection process of patient by being formed through the safety filtering unit in the mounting hole fixed setting at the disengaging muscle center, simultaneously, injection needle is needed to change being sucked the injection of the inner containment of ampoule or phial etc. and being injected into nothing in the injection process of patient and using only single injection needle, with can be safe and simple realize the disposable syringe with safety filtering function of the injection process for the injection that injection is filtered.

Description

Disposable syringe with safety filtering function

Technical field

The present invention relates to a kind of disposable syringe with safety filtering function, more particularly, to by set on The inner top side portion of the neck of cylinder lower end forms disengaging muscle, and has by being formed through the fixation at the disengaging muscle center The safety filtering unit of hole fixed setting prevents from the injection of the inner containment of ampoule or phial etc. is being sucked and is being injected into The foreign matters such as glass particle are injected together with injection in the injection process of patient, meanwhile, by the inside of ampoule or phial etc. The injection of receiving sucks and is injected into the injection process of patient without injection needle is needed to change and single injection needle is used only, With can be safe and simple realize the disposable note with safety filtering function of the injection process for the injection that injection is filtered Emitter.

Background technology

In general, syringe is mostly for putting into drug into human body.

Fig. 1 is to show by making the injection in ampoule flow into the disposable syringe according to prior art to use Use state schematic diagram, Fig. 2 is to show to use according to prior art by making injection in phial flow into The schematic diagram of the use state of disposable syringe.

As shown in Figures 1 and 2, previous syringe uses disposable syringe to prevent infection etc..

In addition, referring to Fig.1, disposable syringe 1 includes according to prior art：Syringe body 10, syringe master Body 10 is formed with the accommodation space opened below and so that injection can be stored inside it；Piston portion 30, the piston portion 30 are inserted into To the accommodation space of the syringe body 10 so that injection can be absorbed into inside or the injection of syringe body 10 Liquid is discharged from the inside of syringe body 10；And injection needle 20, the injection needle 20 are made of engaging portion 25 and syringe needle 22, The engaging portion 25, which is inserted into, is attached to interconnecting piece 15 set on the front end of the syringe body 10, and the syringe needle 22 is from described The front end of engaging portion 25 extends, so as to be inserted into human body.

In order to use disposable syringe 1 as described above to inject injection to patient, it is necessary first to syringe master Injection is introduced in body 10.

At this point, the injection being stored in injection bottle is flowed into syringe body 10.The injection bottle is divided For ampoule 40 as shown in Figure 1 and phial (vial) 70 as shown in Figure 2, the ampoule 40 is made of glass material and with one Type is constituted, and end part 43 is in thin shape thereon, and the phial 70 is made of glass material, and inlet part passes through rubber seal Pad 71 seals.

That is, being made of glass material in use and when with integrally formed ampoule 40, user's finger or other tools come Apply the impact for the degree for rupturing it to the upper part 42 of ampoule 40, is then made as starting point using the part for applying impact 42 hypsokinesis of end part, so as to realize cut-out upper part.

If 22 part of syringe needle of injection needle 20 as above is immersed in piston portion in the state of the injection inside ampoule 40 30 pull back, then injection 60 is flowed by injection needle 20 in the accommodation space of syringe body 10.

In addition, when to use the injection in the phial 70, if in 22 front end of syringe needle of injection needle 20 Divide in the state of being contacted with rubber gasket 71 and push syringe, then syringe needle 22 penetrates through rubber gasket 71 and is in and is immersed in note The state in liquid is penetrated, then pulls back piston portion 30, to which injection to be drawn into syringe body 10.

If as described above, will after the syringe needle 22 that the disposable syringe 1 of injection is housed to be inserted into the body of patient Piston portion 30 pushes forward, then the injection 60 being infused in syringe body 10 is arranged by the syringe needle 22 of injection needle 20 It puts, to realize the injection to patient.

However, when making the injection as above in ampoule 40 or phial 70 be introduced in syringe body 10, it is necessary to Injection is sucked in the state of needing the part in injection needle 20 to be immersed in ampoule 40 or phial 70.

Therefore, it is drawn into syringe together with the fine glass particle K and injection occurred when cutting off the ampoule 40, The problem of patient being injected into together so as to cause the glass particle K that will be included with injection 60.

Also, in the case of the phial 70, syringe needle 22 is forced to pierce through perforation rubber gasket 71, in the syringe needle 22 The rubbery chip that the rubber gasket 71 is torn and generates when penetrating through the rubber gasket 71 is flowed into syringe needle 22, from And the channel of syringe needle 22 is plugged, alternatively, when to inject injection to patient, there is the rubber seal being inserted into syringe needle 22 The rubbery chip of pad 71 is injected into the problem of patient's body together with injection.

More specifically, in the case of the ampoule 40, using the people (nurse, doctor etc.) of syringe to vial After the upper part 42 of manufactured ampoule 40 applies certain impact, the upper part 42 that fractures is so that upper part 42 is in cut-off The syringe needle 22 of injection needle 20 is passed through the inside for being inserted partially into ampoule 40 of opening due to cut-out so that injection by state 60 are inhaled into syringe body 10.

However, when cutting off the upper part of ampoule 40, can not with the naked eye confirm in cutting portion generation very fine Glass particle K, a portion fall to the outside of ampoule 40, and rest part falls to the inside of ampoule 40 and is deposited in injection In liquid 60.

Therefore, it when sucking injection 60 in the state that the syringe needle 22 of the injection needle 20 is immersed in injection 60, sinks The fine glass particle K to form sediment in injection 60 is also inhaled into together.Moreover, as above injection 60 is inhaled into disposable injection When injecting injection 60 to patient in the state of in device 1, also directly injected containing the fine glass particle K in injection 60 To the body of patient.

Also, when the injection in phial 70 to be drawn into syringe, as shown in Fig. 2, in the needle of injection needle Injection is sucked in the state of first 22 perforation rubber gasket, the outer peripheral portion of the syringe needle 22 of the injection needle forces thorn at this time Wear perforation rubber gasket 71.

As described above, the rubber gasket 71 is torn and produces when the syringe needle 22 penetrates through the rubber gasket 71 Raw rubbery chip is flowed into the syringe needle 22 of injection needle, is plugged to the channel of syringe needle 22, to cause to interfere injection Successfully it is inhaled into the problems in syringe.

Meanwhile when to inject injection to patient, the rubber gasket that is inserted into the syringe needle 22 of injection needle 71 rubbery chip is injected into the case where patient's body together with injection, because of the as above rubbery chip stream of rubber gasket 71 Enter to the internal of patient, fatal negative effect is thus caused to the health of patient.

As the technology developed in order to solve the above problem, it has been proposed that by will filter glass particle filter It is interior in injection needle or syringe body come to the technology being filtered containing the glass particle in injection.

However, according to above-mentioned technology, when injection to be drawn into syringe, can filter containing in injection Such as glass particle foreign matter, but, when to be inhaled into the injection in syringe to patient's injection, injection passes through filtering again Device, therefore there are problems that being injected into patient together with injection by the glass particle that the filter is filtered.

To solve the above-mentioned problems, patent document 1 (Korean granted patent the 981586th, grant date：2010.09.03.) It discloses by distinguishing the injection sucking injection needle inside equipped with the injection in sucking ampoule in the state of filter Come with the injection needle that injection is injected into patient in a manner of being directly inserted into patient body according to usage into enforcement Technology.

However, in this case, being used using the user of syringe by sucking the interior injection equipped with filter Injection needle is inserted into after injection is drawn into syringe body by syringe body, is discarded the injection sucking and is injected Then syringe needle is inserted into syringe body come to patient's injection injection by that will be inserted into the injection needle of the body of patient Liquid, therefore the problems such as there are injection process troubles.

It is injected after it will be contained in the injection sucking of the inside of ampoule or phial etc. therefore, it is necessary to study and develop a kind of To can prevent the foreign matters such as glass particle from being injected together with injection in the injection process of patient, meanwhile, peace will be contained in It is injected into the injection process of patient after the injection sucking of the inside of small jar or phial etc. without needing to change injection needle and be used only Single injection needle, with can simply implement the injection process of injection that injection is filtered with safety filtering function Disposable syringe.

Existing technical literature

Patent document

No. 981586 (grant date of (patent document 0001) Korean granted patent：2010.09.03.)

Invention content

(1) technical problems to be solved

To solve the above-mentioned problems, the purpose of the present invention is to provide the disposable syringe with safety filtering function, The disposable syringe with safety filtering function is passed in and out by being formed in the inner top side portion of the neck set on cylinder lower end Muscle, and have and prevented will by being formed through the safety filtering unit in the mounting hole fixed setting at the disengaging muscle center The injection of the inner containment of ampoule or phial etc. sucks and is injected into the foreign matters such as glass particle and note in the injection process of patient Liquid is penetrated to be injected together.

Meanwhile the purpose of the technique according to the invention is through the inner top side portion shape in the neck set on cylinder lower end At disengaging muscle, and have by be formed through the safety filtering unit in the mounting hole fixed setting at the disengaging muscle center come The injection of the inner containment of ampoule or phial etc. is sucked and is injected into nothing in the injection process of patient and needs to change injection needle And single injection needle is used only, with can be safe and simple realize the injection process for the injection that injection is filtered.

(2) technical solution

In order to achieve the above object, the present invention is constituted as follows.That is, according to the present invention primary with safety filtering function Property syringe is made of cylinder, piston and injection needle, which is characterized in that the cylinder is formed with the accommodation space opened above So that injection is stored in the cylinder and includes being protruded the neck to be formed from the lower end center of the cylinder with certain length, The piston is inserted into from lower end by the open portion of the cylinder and selectively injection is made to flow by lifting action Or the outflow cylinder, the injection needle pass through selectively in conjunction with the needle stand for the neck for being fixed on the cylinder Front end fixed setting syringe needle forms, and the inner top side portion of the neck set on the cylinder lower end is formed with disengaging muscle, The center of the disengaging muscle is formed through mounting hole, and multiple recirculation holes are formed through along the circumference of the mounting hole, and The disposable syringe further includes safety filtering unit, which is fixed on the upside of the disengaging muscle, makes Obtain the inside that the injection containing foreign matter is flowed into the cylinder by the injection ampoule for having injection from inner containment or phial Afterwards, foreign matter is filtered, pressurization of the injection by the piston to be filtered and the institute by the injection needle State the body that syringe needle is injected into patient.

Herein, it is preferable that the safety filtering unit includes：Valve is passed in and out, which is fixed at the disengaging muscle Top so as to the recirculation hole that the inner space of the opposite cylinder opens be sealed so that the recirculation hole selectively It can open, and the disengaging valve includes flowing into guide pin, the inflow guide pin is expanded outwardly from the outboard end of main body so that described It flows into guide pin to be adjacent to from the inside bottom surface of disengaging muscle upper end to the cylinder, the center of the main body is formed through It fixes cave and is formed with multiple outflow caves from the outer circumference along the fixed cave；Filter, the filter are centrally formed There is through-hole, the bottom surface of the filter becomes placed against above the main body of the disengaging valve, to being opened in the inflow guide pin The injection containing foreign matter for being flowed into the cylinder interior when putting by the recirculation hole is filtered so that the injection The foreign matter contained in by the recirculation hole and when being flowed out to the injection needle is flowed out by filtering；And fixing piece, this is fixed Part by be formed in the disengaging fixed cave of the main center of valve, the through-hole of the filter and it is described into The mounting hole for going out muscle is combined so that the disengaging valve and filter are fixed on the upside of the disengaging muscle.

At this time, it is preferable that there is the main body of the disengaging valve a certain size outboard end of main body is located at The central part of the recirculation hole and be formed as than it is described flow into guide pin thickness it is thicker, the inflow guide pin is formed as comparing The thinner soft plate of the main body is simultaneously integrally formed with the main body so that the outboard end for flowing into guide pin selects Up tilt certain angle to selecting property, so as to the injection containing foreign matter be flowed by a side section of the recirculation hole it is described The inside of cylinder, and the excessively described stream of the other side lease making that the injection that is filtered of foreign matter passes through the recirculation hole from the cylinder Through-hole flows out at the injection needle.

And, it is preferable that the disengaging valve and the filter are fixed at the disengaging muscle by the fixing piece Upside, and the fixing piece includes：Head, the head are formed to have the face of the via area bigger than the filter Product and there is certain thickness, above the through-hole circumference to support the filter；Extension, the extension is from the head Portion bottom surface extends certain length, and is up divided into certain length from the lower end of the extension multiple so as in the extension Central part has elastic deformation space；And hook portion, each lower end that the segmentation of the hook portion and the extension is formed are facing And it protrudes outward.

Furthermore it is preferred that the filter is reticular pattern or non-woven fabric type with microgrid so that foreign matter is filtered Injection flowed out to from the injection needle by the recirculation hole from the cylinder.

And, it is preferable that the recirculation hole is formed through along the circumference of the mounting hole to be multiple, and along described solid Determining the circumference in hole, to be formed through be 4 or 2.

(3) advantageous effect

Disposable syringe according to the present invention with safety filtering function has the following effects that：

For the first time, by forming disengaging muscle in the inner top side portion of the neck set on cylinder lower end, and have and pass through breakthrough form It is prevented by the inside of ampoule or phial etc. at the safety filtering unit of the mounting hole fixed setting at the disengaging muscle center The injection of receiving sucks and is injected into the foreign matters such as glass particle in the injection process of patient to be injected together with injection.

Secondly, by forming disengaging muscle in the inner top side portion of the neck set on cylinder lower end, and have and pass through breakthrough form Come by the inner containment of ampoule or phial etc. at the safety filtering unit of the mounting hole fixed setting at the disengaging muscle center Injection suck and be injected into the injection process of patient, and previous difference, without need to change injection needle and using only single Injection needle, with can be safe and simple realize the injection process of injection that injection is filtered with safety filtering function Disposable syringe.

Description of the drawings

Fig. 1 is to show by making the injection in ampoule flow into the disposable syringe according to prior art to use Use state schematic diagram.

Fig. 2 is to show by making the injection in phial flow into the disposable syringe according to prior art to use Use state schematic diagram.

Fig. 3 is the separated structure figure for showing the disposable syringe according to the present invention with safety filtering function.

Fig. 4 is the major part cross-section structure for showing the disposable syringe according to the present invention with safety filtering function Figure.

Fig. 5 is the safe mistake for the major part for showing the disposable syringe according to the present invention with safety filtering function Filter the separated structure figure of unit.

Fig. 6 is the process shown using the disposable syringe injection according to the present invention with safety filtering function In, make the use state diagram for the step that injection is flowed into cylinder.

Fig. 7 is the process shown using the disposable syringe injection according to the present invention with safety filtering function In, pass through the step of flowing out to the injection being flowed into cylinder at injection needle come to the internal injection injection of patient Use state diagram.

Reference sign

100:Cylinder

110:Neck

120:Pass in and out muscle

121:Mounting hole

125:Recirculation hole

200:Piston

300:Injection needle

310:Needle stand

320:Syringe needle

500:Safety filtering unit

510:Pass in and out valve

512:Fixed cave

513:Flow out cave

530:Filter

550:Fixing piece

Specific implementation mode

In the following, with reference to attached drawing to the preferred embodiment of the disposable syringe according to the present invention with safety filtering function It is described in detail.

Fig. 3 is the separated structure figure for showing the disposable syringe according to the present invention with safety filtering function, and Fig. 4 is Show that the major part sectional structure chart of the disposable syringe according to the present invention with safety filtering function, Fig. 5 are to show The separated structure of the safety filtering unit of the major part of disposable syringe according to the present invention with safety filtering function Figure.

Fig. 6 is the process shown using the disposable syringe injection according to the present invention with safety filtering function In, it is to show have using according to the present invention to make the use state diagram for the step that injection is flowed into cylinder, Fig. 7 During the disposable syringe injection of safety filtering function, by the way that the injection being flowed into cylinder is flowed out to injection needle The use state diagram for the step of carrying out the internal injection injection to patient at head.

As shown in Fig. 3 to Fig. 7, in the same manner as common disposable syringe, tool according to a preferred embodiment of the invention There is the disposable syringe of safety filtering function to be made of cylinder 100, piston 200 and injection needle 300,100 shape of the cylinder At having the accommodation space opened above that injection is made to be stored in the inside of the cylinder 100 and include from the cylinder 100 Lower end center protrudes the neck 110 to be formed with certain length, and the piston 200 is by the open portion of the cylinder 100 under End is inserted into and injection is selectively made to flow in or out the cylinder 100 by lifting action, and the injection needle 300 is logical It crosses and syringe needle 320 selectively is being fixedly installed in conjunction with the front end of the needle stand 310 for the neck 110 for being fixed on the cylinder 100 It forms.

In particular, the thus configured disposable syringe with safety filtering function according to a preferred embodiment of the invention In, it is formed with disengaging muscle 120, the disengaging muscle set on the inner top side portion of the neck 110 of 100 lower end of the cylinder 120 center is formed through mounting hole 121, and multiple recirculation holes 125 are formed through along the circumference of the mounting hole 121.

At this time, it is preferable that the recirculation hole 125 is formed through along the circumference of the mounting hole 121 to be multiple, and along It is 4 or 2 that the circumference of the mounting hole 121, which is formed through,.

That is, the recirculation hole 125 can be formed through along the circumference of the mounting hole 121 it is more more than at least two A hole.

In addition, the disposable syringe with safety filtering function makes the note for having injection from inner containment as described above It penetrates after the injection containing foreign matter is flowed into the inside of the cylinder 100 by liquid ampoule or phial, foreign matter is filtered, so as to The injection filtered by the piston 200 pressurization and patient is injected by the syringe needle of the injection needle 300 320 Body.

For this purpose, the disposable syringe according to the present invention with safety filtering function further includes safety filtering unit 500, The safety filtering unit 500 is fixed at 120 upside of the disengaging muscle.

At this point, the safety filtering unit 500 includes disengaging valve 510, filter 530 and fixing piece 550.

More specifically, the disengaging valve 510 is fixed at 120 top of the disengaging muscle so as to the opposite cylinder The recirculation hole 125 that 100 inner space opens is sealed so that the recirculation hole 125 can selectively open.

In other words, it is preferably that the disengaging valve 510 includes flowing into guide pin, the guide pin that flows into is from the outer of main body Side expands outwardly so that the inside bottom surface for flowing into guide pin from disengaging 120 upper end of muscle to the cylinder 100 is pasted Tightly, the center of the main body is formed through fixed cave 512 and is formed with from the outer circumference along the fixed cave 512 multiple Flow out cave 513.

At this time, it is preferable that in the main body, the outflow cave 513 is penetrated through along the outer circumference in the fixed cave 512 Be formed as multiple, and it is 4 or 2 to be accordingly formed through with the recirculation hole 125.

In addition, disengaging valve 510 is in direct contact with the injection for being injected into patient's body as described above, moreover, in order to make To it is described inflow guide pin be applied to when injection is flowed into 100 inside of cylinder feed pressure the case where described in Flowing into the outboard end of guide pin can flexibly tilt, and disengaging valve 510 is preferably made of soft silicone material.

Also, the filter 530 is centrally formed with through-hole, and the bottom surface of the filter 530 becomes placed against described Above the main body for passing in and out valve 510.

The filter 530 by the recirculation hole 125 when the inflow guide pin is opened to being flowed into the cylinder The injection containing foreign matter inside 100 is filtered so that the injection is by the recirculation hole 125 and to the injection The foreign matter that syringe needle 300 includes when flowing out is flowed out by filtering.

At this time, it is important that the filter 530 makes the injection that foreign matter is filtered from described in the cylinder 100 process Recirculation hole 125 flows out at the injection needle 300, therefore, the filter 530 be preferably with microgrid netted or Non-woven fabric type.

Certainly, in order to make filter effect maximize, the filter 530 can be with the netted of microgrid, meanwhile, It may also include the various filter elements such as nonwoven fabric filter, paper filter inside it.

In addition, the fixing piece 550 by be formed in it is described disengaging valve 510 the main center the fixed cave 512, the mounting hole 121 of the through-hole of the filter 530 and the disengaging muscle 120 is combined.

To which the disengaging valve 510 and the filter 530 are fixed at the disengaging muscle by the fixing piece 550 120 upsides.

Furthermore it is preferred that the fixing piece 550 the disengaging valve 510 and the filter 530 are fixed at it is described 120 upside of muscle is passed in and out, and includes head, extension and hook portion.

At this point, the head is formed to have the area of the via area bigger than the filter 530 and has Certain thickness, above the through-hole circumference to support the filter 530.

Also, the extension from the head bottom surface extend certain length, and from the lower end of the extension up with Certain length be divided into it is multiple so as to the central part of the extension have elastic deformation space.The hook portion is prolonged with described Each lower end that the segmentation of extending portion is formed is facing and protrudes outward.

In addition, it is important that the disposable syringe according to the present invention with safety filtering function as described above makes Injection containing foreign matter is flowed into the inside of the cylinder 100 by a side section of the recirculation hole 125, and foreign matter is by mistake The injection of filter flows out to institute from the cylinder 100 by the other side lease making of the recirculation hole 125 recirculation hole 125 excessively It states at injection needle 300.

It is therefore preferred that there is the main body of the disengaging valve 510 a certain size its outboard end to be made to be located at the recirculation hole 125 central part and be formed as than it is described flow into guide pin thickness it is thicker, the inflow guide pin is formed as than the master The thinner soft plate of body is simultaneously integrally formed with the main body so that the outboard end for flowing into guide pin is selectively Up tilt certain angle.

As described above, the disposable syringe according to the present invention with safety filtering function, by set on cylinder 100 The inner top side portion of the neck 110 of lower end forms disengaging muscle 120, and has by being formed through at 120 center of disengaging muscle The safety filtering unit 500 that is fixedly installed of mounting hole 121 come stable against by the inner containment of ampoule or phial etc. Injection sucks and is injected into the foreign matters such as glass particle in the injection process of patient to be injected together with injection.

Meanwhile by forming disengaging muscle 120 in the inner top side portion of the neck 110 set on 100 lower end of cylinder, and have logical It crosses and is formed through the safety filtering unit 500 that the mounting hole 121 at disengaging muscle 120 center is fixedly installed, and previous difference, Injection needle is needed to change being sucked the injection of the inner containment of ampoule or phial etc. and being injected into nothing in the injection process of patient Head and single injection needle is used only, with can be safe and simple realize having for the injection process of injection that injection is filtered The disposable syringe of safety filtering function.

In addition, single injection needle is used only without injection needle is needed to change, injection quilt with can be safe and simple be realized The injection process of the injection of filtering, to, with by by injection needle be divided into for after the injection needle of filtering and filtering more That changes injects the injection needle of injection in addition to manufacture and use the existing skill of two kinds of injection needles for the body to patient Art is different, by the manufacturing cost that can significantly reduce disposable syringe using only single injection needle.

To sum up, specific embodiments of the present invention are described in detail, but present invention is not limited to this, are not departing from power Under the premise of the thought of profit requirement and field, those skilled in the art can be changed with various forms to implement, also, so Deformation should be construed as belonging within scope of the invention.

Claims

1. a kind of disposable syringe with safety filtering function, by cylinder (100), piston (200) and injection needle (300) It constitutes, which is characterized in that the cylinder (100) is formed with the accommodation space opened above and injection is made to be stored in the cylinder (100) inside and include that the neck to be formed (110) is protruded with certain length from the lower end center of the cylinder (100), it is described Piston (200) is inserted into from lower end by the open portion of the cylinder (100) and selectively makes injection by lifting action Liquid flows in or out the cylinder (100), and the injection needle (300) passes through selectively in conjunction with being fixed on the cylinder (100) the front end fixed setting syringe needle (320) of the needle stand (310) of the neck (110) forms,

And the inner top side portion of the neck (110) set on the cylinder (100) lower end is formed with disengaging muscle (120), institute The center for stating disengaging muscle (120) is formed through mounting hole (121), is formed through along the circumference of the mounting hole (121) Multiple recirculation holes (125),

And the disposable syringe further includes safety filtering unit (500), which is fixed at institute State on the upside of disengaging muscle (120) so that from inner containment have injection injection ampoule or phial by the injection containing foreign matter After being flowed into the inside of the cylinder (100), foreign matter is filtered, so that the injection that is filtered is by the piston (200) pressurization and the body that patient is injected by the syringe needle of the injection needle (300) (320),

And the safety filtering unit (500) includes：

Valve (510) is passed in and out, which is fixed above the disengaging muscle (120) so as to the opposite cylinder (100) recirculation hole (125) that inner space opens is sealed so that the recirculation hole (125) can selectively open It puts, and the disengaging valve (510) includes flowing into guide pin, the inflow guide pin is expanded outwardly from the outboard end of main body so that institute It states inflow guide pin to be adjacent to from the inside bottom surface of disengaging muscle (120) upper end to the cylinder (100), in the main body The heart is formed through fixed cave (512) and is formed with multiple outflow caves from the outer circumference along the fixed cave (512) (513)；

Filter (530), the filter (530) are centrally formed with through-hole, and the bottom surface of the filter (530) becomes placed against in institute Above the main body for stating disengaging valve (510), to being flowed by the recirculation hole (125) when the inflow guide pin is opened The internal injection containing foreign matter of the cylinder (100) is filtered so that the injection passes through the recirculation hole (125) And the interior foreign matter contained is flowed out by filtering when being flowed out to the injection needle (300)；And

Fixing piece (550), the fixing piece (550) is by being formed in the described solid of the main center for passing in and out valve (510) The mounting hole (121) for determining cave (512), the through-hole of the filter (530) and the disengaging muscle (120) is tied It closes so that the disengaging valve (510) and the filter (530) are fixed on the upside of the disengaging muscle (120).

2. the disposable syringe according to claim 1 with safety filtering function, which is characterized in that

There is the main body of the disengaging valve (510) a certain size the outboard end of the main body to be made to be located at the recirculation hole (125) central part and be formed as thicker than the thickness for flowing into guide pin, the inflow guide pin is formed as than described The thinner soft plate of main body is simultaneously integrally formed with the main body so that the outboard end selectivity for flowing into guide pin Ground up tilts certain angle, so that the injection containing foreign matter is flowed into institute by a side section of the recirculation hole (125) The inside of cylinder (100) is stated, and the injection that foreign matter is filtered passes through the another of the recirculation hole (125) from the cylinder (100) One side section is flowed out to by the recirculation hole (125) at the injection needle (300).

3. the disposable syringe according to claim 1 with safety filtering function, which is characterized in that

The disengaging valve (510) and the filter (530) are fixed at the disengaging muscle by the fixing piece (550) (120) upside,

And the fixing piece (550) includes：

Head, the head are formed to have the area of the via area bigger than the filter (530) and with certain Thickness, above the through-hole circumference to support the filter (530)；

Extension, the extension extend certain length from the head bottom surface, and from the lower end of the extension up with a fixed length Degree be divided into it is multiple so as to the central part of the extension have elastic deformation space；And

Each lower end that the segmentation of hook portion, the hook portion and the extension is formed faces each other and protrudes outward.

4. the disposable syringe according to claim 1 with safety filtering function, which is characterized in that

The filter (530) be reticular pattern or non-woven fabric type with microgrid so that the injection that foreign matter is filtered from The cylinder (100) flows out to by the recirculation hole (125) at the injection needle (300).

5. the disposable syringe according to claim 1 with safety filtering function, which is characterized in that

The recirculation hole (125) is formed through along the circumference of the mounting hole (121) to be multiple, and along the mounting hole (121) it is 4 or 2 that circumference, which is formed through,.