CN107126600A - Isolation protector and the injection device with the Isolation protector - Google Patents

Abstract

The invention discloses a kind of Isolation protector and the injection device with the Isolation protector; the Isolation protector includes closed vessel, separator and the first unidirectional opening and closing element; closed vessel has chamber, first end and the second end; first end is provided with the receiver hole for being suitable to plug with the first liquid outlet on syringe, and the second end is provided with the second liquid outlet for being suitable to plug with injection needle；Separator is arranged in closed vessel, and chamber is divided into diversion cavity and cushion chamber, and diversion cavity is communicated with receiver hole and the second liquid outlet, and separator is provided with the escape orifice for connecting cushion chamber with diversion cavity；First unidirectional opening and closing element is arranged on separator and closes escape orifice, and is configured to when the fluid pressure in diversion cavity is more than first predetermined value, and escape orifice is unidirectionally opened in the direction along diversion cavity to cushion chamber.The present invention can isolate to syringe, and syringe will not be polluted, and reduce the infection risk caused by syringe.Furthermore, it is possible to prevent the sense of discomfort caused by pushing is too fast.

Description

Isolation protector and the injection device with the Isolation protector

Technical field

The present invention relates to medical appliance, more particularly to a kind of Isolation protector and the injection dress with the Isolation protector Put.

Background technology

Syringe is a kind of common medical instruments, and syringe is by the foraminate injection tube of front end band and matching Plunger rod is constituted, for injecting liquid into region that other methods can not approach or being extracted out from those places, in plunger rod Liquid or gas are sucked from injection tube front end aperture when extraction, extrude liquid or gas when core bar is pushed into.

However, when using syringe injecting fluid into human body, especially in intramuscular injection, with plunger rod Liquid in push-in, injection tube is gradually injected to body, and after plunger rod is pushed into extreme position, liquid injection is completed When, because injection phase fluid accumulation causes fluid pressure larger on body surface, so, the position there may be partially liq Reverse reflux, it is possible to the front end of injection tube is entered to via syringe needle, in this way, causing the front end of syringe to pollute.In addition, by The experience of doctor or nurse pushes plunger rod, it is unavoidable produce because injection speed is too fast and to patient caused by sense of discomfort or distending pain sense.

The content of the invention

It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, the present invention One purpose is to propose a kind of Isolation protector.

It is another object of the present invention to propose a kind of injection device with above-mentioned Isolation protector.

To achieve the above object, on the one hand, Isolation protector according to embodiments of the present invention, be adapted to attach to syringe with Between injection needle, including：

Closed vessel, the closed vessel has chamber, first end and the second end, the first end be provided be suitable to it is described The receiver hole that the first liquid outlet on syringe is plugged, second end is provided be suitable to plug with the injection needle second Liquid outlet；

Separator, the separator is arranged in the closed vessel, and the chamber is divided into diversion cavity and buffering Chamber, the diversion cavity is communicated with the receiver hole and the second liquid outlet, the separator be provided with by the cushion chamber with it is described The escape orifice of diversion cavity connection；

First unidirectional opening and closing element, the first unidirectional opening and closing element is arranged on the separator and closes the escape orifice, And be configured to when the fluid pressure in the diversion cavity is more than first predetermined value, along the diversion cavity to the cushion chamber Unidirectionally open the escape orifice in direction.

The Isolation protector provided according to embodiments of the present invention, the Isolation protector can be connected to syringe and injection needle Between, in this way, when there is liquid reflux problem, the liquid of backflow is entered in Isolation protector, without entering to injection Device, therefore, will not be polluted to syringe, reduce the infection risk caused by syringe.In addition, when pushing excessive velocities When, fluid pressure increase in the diversion cavity in Isolation protector, when increasing to first predetermined value, the first unidirectional opening and closing element Open, now, the liquid in diversion cavity can be entered in cushion chamber by escape orifice, thus, it is possible to reduce from the second liquid outlet The fluid flow of inflow, and then play a protective role, prevent from drawing because the too fast flow caused of pushing is excessive to a certain extent The sense of discomfort risen.

In addition, Isolation protector according to the above embodiment of the present invention can also have technical characteristic additional as follows：

According to one embodiment of present invention, in addition to：

Second unidirectional opening and closing element, the one end of the receiver hole away from the syringe is blind end, and the blind end is provided with Fluid hole, the second unidirectional opening and closing element is arranged at the blind end and closes the fluid hole, and is configured to when described the When fluid pressure in one liquid outlet is more than second predetermined value, institute is unidirectionally opened along the fluid hole to the direction of the diversion cavity State fluid hole.

According to one embodiment of present invention, the second predetermined value is less than the first predetermined value.

According to one embodiment of present invention, in addition to：

Piston component, the piston component includes piston and spring, and the piston is slidably installed in the cushion chamber simultaneously The cushion chamber is isolated into the first sub- cavity and the second sub- cavity, the spring, which is arranged at, described is arranged at the described first sub- chamber In vivo and motive force is provided for the piston, the second sub- cavity is communicated with the escape orifice；The separator is provided with will The return port that the second sub- cavity is connected with the diversion cavity；

3rd unidirectional opening and closing element, the 3rd unidirectional opening and closing element is arranged at the separator and closes the return port, and It is configured to, when the fluid pressure in the described second sub- cavity is more than third predetermined value, lead to described along the described second sub- cavity Unidirectionally open the return port in the direction of stream chamber.

According to one embodiment of present invention, the closed vessel is formed as hollow cylindrical, and the separator is formed as Both ends open and the cylinder being coaxially disposed with the closed vessel, one end of the cylinder is with the receiver hole away from the injection One end of device is communicated, and the other end of the cylinder is communicated with second liquid outlet.

According to one embodiment of present invention, the piston is arranged outside the cylinder and closely pasted with the outer wall of the cylinder Close.

According to one embodiment of present invention, the closed vessel includes cup and closure, and one end of the cup is set There is second liquid outlet, the other end of the cup is openend；The closure is threadedly coupled with the openend, and institute Closure is stated provided with the receiver hole.

According to one embodiment of present invention, described one end of the cup is provided with inwardly projecting hickey, described The other end of cylinder is threadedly coupled with the hickey, and described one end and the closure of the cylinder are closely pasted Close.

According to one embodiment of present invention, the described first unidirectional opening and closing element, the second unidirectional opening and closing element and the 3rd unidirectionally open Each in closing member is check valve sheet.

On the other hand, the injection device provided according to embodiments of the present invention, including：

Syringe, the syringe includes injection tube and plunger rod, and the injection tube has circulation passage, near-end and remote End, the distal end has the first liquid outlet communicated with the fluid passage, and the plunger rod is slidably installed in injection tube；

Isolate current limiter as described above, the receiver hole of the isolation current limiter is plugged with first liquid outlet；

Injection needle, the injection needle is plugged with second liquid outlet for isolating current limiter.

The injection device provided according to embodiments of the present invention, with above-mentioned Isolation protector, so, in injection, no Syringe can be polluted, reduce the infection risk caused by syringe.Furthermore, it is possible to play a protective role, to a certain degree On prevent due to push the too fast flow caused it is excessive caused by sense of discomfort.

The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by the practice of the present invention.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Structure according to these accompanying drawings obtains other accompanying drawings.

Fig. 1 is the perspective view of Isolation protector of the embodiment of the present invention；

Fig. 2 is the exploded view of Isolation protector of the embodiment of the present invention；

Fig. 3 is the sectional view of Isolation protector of the embodiment of the present invention；

Fig. 4 is Isolation protector of the embodiment of the present invention cuing open when the first unidirectional opening and closing element, the second unidirectional opening and closing element are opened View；

Fig. 5 is sectional view of the Isolation protector of the embodiment of the present invention when the 3rd unidirectional opening and closing element is opened；

Fig. 6 is the perspective view of injection device of the embodiment of the present invention；

Fig. 7 is the sectional view of injection device of the embodiment of the present invention；

Fig. 8 is the exploded view of injection device of the embodiment of the present invention.

Reference：

Isolation protector 100；

Closed vessel 10；

Cup 101；

Second liquid outlet 1011；

Closure 102；

Receiver hole 1021；

Fluid hole 1022；

Separator 20；

Escape orifice 201；

Return port 202；

Diversion cavity P01；

Cushion chamber P02；

First sub- cavity P021；

Second sub- cavity P022；

First unidirectional opening and closing element 30；

Second unidirectional opening and closing element 40；

Piston component 50；

Piston 501；

Spring 502；

3rd unidirectional opening and closing element 60；

Syringe 200；

Injection tube 210；

First liquid outlet 2101；

Plunger rod 220；

Injection needle 300.

The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.

Embodiment

Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention, based on this Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made Example is applied, the scope of protection of the invention is belonged to.

In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time The orientation or position relationship of the instruction such as pin ", " counterclockwise " " axial direction ", " circumference ", " radial direction " be based on orientation shown in the drawings or Position relationship, is for only for ease of the description present invention and simplifies description, rather than indicate or imply that the device or element of meaning must There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.

In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or Implicitly include one or more this feature.In the description of the invention, " multiple " are meant that two or more, Unless otherwise specifically defined.

In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc. Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；It can be machine Tool is connected or electrically connected；Can be joined directly together, can also be indirectly connected to by intermediary, can be two members Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be Concrete meaning in bright.

In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under " Can directly it be contacted including the first and second features, it is not direct contact but by it that can also include the first and second features Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special Levy directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature exists Second feature " under ", " lower section " and " following " fisrt feature that includes are immediately below second feature and obliquely downward, or be merely representative of Fisrt feature level height is less than second feature.

The Isolation protector 100 of the embodiment of the present invention is described in detail with reference to the accompanying drawings.

The Isolation protector 100 shown in Fig. 1 to Fig. 5, provided according to embodiments of the present invention is provided, injection is adapted to attach to Between device 200 and injection needle 300, including closed vessel 10, the unidirectional opening and closing element 30 of separator 20 and first.

Specifically, closed vessel 10 has chamber, first end and the second end, the first end, which is provided with, to be suitable to and the injection The receiver hole 1021 that the first liquid outlet 2101 on device 200 is plugged, second end, which is provided with, to be suitable to and the phase of injection needle 300 Second liquid outlet 1011 of grafting.That is, the receiver hole 1021 for the first end for passing through the closed vessel 10 and syringe 200 The first liquid outlet 2101 plug after, it is possible to achieve the Isolation protector 100 is assembled on syringe 200, and passes through this After second liquid outlet 1011 at the second end of closed vessel 10 is plugged with injection needle 300, it is possible to achieve assemble injection needle 300 To the Isolation protector 100.It should be noted that by inserting between the closed vessel 10 and syringe 200 and injection needle 300 The mode of connecing is connected, and is easy to assemble and is dismantled.

Separator 20 is arranged in the closed vessel 10, and the chamber is divided into diversion cavity P01 and cushion chamber P02, the diversion cavity P01 are communicated with the liquid outlet 1011 of receiver hole 1021 and second, and the separator 20 is provided with institute State the escape orifice 201 that cushion chamber P02 is connected with the diversion cavity P01.

That is, separator 20 is separated into diversion cavity P01 and cushion chamber P02 in chamber in closed vessel 10, when this After the receiver hole 1021 of the first end of closed vessel 10 is plugged with the first liquid outlet 2101 on syringe 200, closed vessel 10 can connect with the diversion cavity P01 in the closed vessel 10, and the liquid in syringe 200 can be via the first liquid outlet 2101 The diversion cavity P01 of closed vessel 10 is flowed into, then the second liquid outlet 1011 of the closed vessel 10 is flowed to from diversion cavity P01, most Afterwards, injection needle 300 is entered to via the second liquid outlet 1011.Simultaneously as escape orifice 201 is provided with separator 20, so, When the escape orifice 201 is in open mode, the liquid in diversion cavity P01 can also enter cushion chamber P02 by escape orifice 201 It is interior.

First unidirectional opening and closing element 30 is arranged on the separator 20 and closes the escape orifice 201, and is configured to work as When fluid pressure in the diversion cavity P01 is more than first predetermined value, along the diversion cavity P01 to the side of the cushion chamber P02 To unidirectionally opening the escape orifice 201.

That is, the first unidirectional opening and closing element 30 is for controlling escape orifice 201 on separator 20 to open and close, Specifically, when using 200 injecting fluid of syringe, liquid is flowed into diversion cavity P01 by the first liquid outlet 2101, when leading When flowing the fluid pressure in chamber P01 more than first predetermined value, then the first unidirectional opening and closing element 30 is opened, now, escape orifice 201 dozens Open, the liquid in diversion cavity P01 can enter to cushion chamber P02, and when the fluid pressure in diversion cavity P01 is pre- less than first During definite value, then the first unidirectional opening and closing element 30 is closed, and now, the liquid in diversion cavity P01 cannot be introduced into cushion chamber P02.

It should be noted that first predetermined value is to open the first unidirectional opening and closing element 30 to need the minimum value of fluid pressure, because This, the normal injection speed that be able to can be born according to human body sets the first unidirectional opening and closing element 30, and then make it that first unidirectionally opens Closing member 30 is opened under suitable pressure.

Fig. 6 to Fig. 8 is refer to, and shown in Fig. 3 to Fig. 5, the Isolation protector 100 and note of the present invention is briefly described below During the using cooperatively of emitter 200 and injection needle 300.

First, the receiver hole 1021 of the Isolation protector 100 is mutually inserted with the first liquid outlet 2101 on syringe 200 Connect, and the second liqiud outlet head of injection needle 300 and the Isolation protector 100 is plugged.And injection needle 300 is inserted into human body Injection position.

Then, the plunger rod 220 of squeezing emitter 200 is then slightly pushed hard so that the liquid in syringe 200 goes out from first Liquid mouth 2101 is flowed into the diversion cavity P01 of Isolation protector 100, then flows into injection needle 300 by diversion cavity P01, finally, Out of injection needle 300 injection human body.

When the excessive velocities of pushing, flow into liquid in diversion cavity P01 and increase, and the diameter of injection needle 300 is relatively It is small, so, the fluid pressure in diversion cavity P01 can be caused to increase, when the liquid increase in diversion cavity P01, then via injection The flow velocity of liquid can also increase in pin 300, and then cause the sense of discomfort of human body.In the case, if liquid in diversion cavity P01 When body pressure is more than first predetermined value, then the unidirectional opening and closing element 30 of first on separator 20 is opened, now, letting out on separator 20 Discharge hole 201 is opened (as shown in Figure 4), and a part of liquid in diversion cavity P01 enters to cushion chamber P02 via the escape orifice 201 It is interior, in this way, the flow flowed into injection needle 300 can be reduced；

Finally, after the completion of liquid injection, injection needle 300 is extracted from human body.It should be noted that completing it in injection When injection needle 300 is not extracted also, due in human body injection position fluid accumulation to be likely to result in local pressure larger, so it is possible to Injection needle 300 can reversely be flowed into by having partially liq, or even flow into via injection needle 300 diversion cavity of Isolation protector 100 In P01.

The Isolation protector 100 provided according to embodiments of the present invention, the Isolation protector 100 can be connected to syringe Between 200 and injection needle 300, in this way, when there is liquid reflux problem, the liquid of backflow is entered in Isolation protector 100, Without entering to syringe 200, therefore, syringe 200 will not be polluted, reduce the infection caused by syringe 200 Risk.In addition, when pushing excessive velocities, fluid pressure increase, is being increased in the diversion cavity P01 in Isolation protector 100 During first predetermined value, the first unidirectional opening and closing element 30 can be opened, now, and the liquid in diversion cavity P01 can be entered by escape orifice 201 Enter to cushion chamber P02, thus, it is possible to reduce the fluid flow flowed into from the second liquid outlet 1011, and then play a protective role, The sense of discomfort caused by the too fast flow caused of pushing is excessive is prevented to a certain extent.

It should be noted that syringe 200 can be disposable plastic material syringe 200 or The syringe 200 of reusable metal, glass material.If disposable syringe 200, if syringe 200 be contaminated, then after the syringe 200 is dropped or waste product transfer, reclaim etc. during, easily cause cross-infection； And if the syringe 200 that may be reused, then, can be to follow-up if sterilization is not thorough in subsequent use Patient causes infection, therefore, and Isolation protector 100 provided in an embodiment of the present invention can be with completely isolated syringe 200 and injection Pin 300, prevents withdrawing fluid from entering syringe 200, reduces the infection risk caused by syringe 200.

It refer to shown in 2 to Fig. 4, in some embodiments of the invention, in addition to the second unidirectional opening and closing element 40, it is described to connect The one end of batter 1021 away from the syringe 200 is blind end, and the blind end is provided with fluid hole 1022, and described second is unidirectional Opening and closing element 40 is arranged at the blind end and closes the fluid hole 1022, and is configured to work as in first liquid outlet 2101 Fluid pressure when being more than second predetermined value, unidirectionally open described along the fluid hole 1022 to the direction of the diversion cavity P01 Fluid hole 1022.

That is, the second unidirectional opening and closing element 40 is for controlling fluid hole 1022 to open and close, specifically, when note When fluid pressure is more than second predetermined value in first liquid outlet 2101 in emitter 200, then the second unidirectional opening and closing element 40 is opened, this When, fluid hole 1022 is opened (as shown in Figure 4), and the liquid in the first liquid outlet 2101 can enter diversion cavity P01, and when this When fluid pressure in one liquid outlet 2101 is less than second predetermined value, then the second unidirectional opening and closing element 40 is closed, and now, first goes out Liquid in liquid mouth 2101 cannot be introduced into diversion cavity P01.In this way, when using 200 injecting fluid of syringe, the first liquid outlet Pressure in 2101 can gradually increase, and the second unidirectional opening and closing element 40 can be opened by being finally more than second predetermined value, and liquid can be from First liquid outlet 2101 flows into diversion cavity P01.

Simultaneously as the second unidirectional opening and closing element 40 is the direction one-way conduction along fluid hole 1022 to diversion cavity P01, and Can not be turned on from diversion cavity P01 to the direction of fluid hole 1022, so, injection complete its injection needle 300 do not extract also when, such as Fruit has partially liq reversely to flow into injection needle 300, and flows into via injection needle 300 the diversion cavity P01 of Isolation protector 100 In, then because the second unidirectional opening and closing element 40 can not be turned on from diversion cavity P01 to the direction of fluid hole 1022, so, the part Liquid is cannot flow into the first liquid outlet 2101 of syringe 200, so, it is possible to achieve the barrier of withdrawing fluid, it is to avoid The pollution that withdrawing fluid is caused to syringe 200, so that, the infection risk caused by syringe 200 is reduced, it is further improved Security.

Alternatively, second predetermined value is less than the first predetermined value.That is, the second unidirectional opening and closing element 40 opens when institute The fluid pressure needed is less than fluid pressure required when the first unidirectional opening and closing element 30 is opened, so, it can be ensured that in note During penetrating, the second unidirectional opening and closing element 40 is easily opened, and the liquid in syringe 200 can more smoothly flow into water conservancy diversion In chamber P01.Meanwhile, the first unidirectional valve that opens and closes will not be opened easily, and only the liquid pressure value in diversion cavity P01 is of a relatively high (i.e. more than second predetermined value) can just be opened, and then the partially liq in diversion cavity P01 is branched into cushion chamber P02, thus, its Using effect more preferably, can smooth injecting fluid, can ensure that and shunted when pressure is excessive again.

It refer to shown in Fig. 2 to Fig. 4, in some embodiments of the invention, in addition to piston component 50 and the 3rd is unidirectional Opening and closing element 60, wherein, piston component 50 includes piston 501 and spring 502, and the piston 501 is slidably installed in the cushion chamber In P02 and the cushion chamber P02 is isolated into the first sub- sub- cavity P022 of cavity P021 and second, the spring 502 is arranged at It is described to be arranged in the described first sub- cavity P021 and provide motive force for the piston 501, the second sub- cavity P022 with The escape orifice 201 is communicated；The separator 20 is provided with connect the described second sub- cavity P022 with the diversion cavity P01 Return port 202.

3rd unidirectional opening and closing element 60 is arranged at the separator 20 and closes the return port 202, and is configured to work as institute When stating fluid pressure in the second sub- cavity P022 and being more than third predetermined value, along the described second sub- cavity P022 to the diversion cavity Unidirectionally open the return port 202 in P01 direction.

That is, piston component 50 is provided in the cushion chamber P02 inside closed vessel 10, wherein, piston 501 with Cushion chamber P02 is slidably matched, and can be slidably reciprocated in cushion chamber P02, and can cause when piston 501 is slided the first sub- chamber The sub- cavity P022 of body P021 and second produce opposite Volume Changes, and the second sub- cavity P022 is communicated with escape orifice 201, It that is to say, the partially liq in diversion cavity P01 via escape orifice 201 can flow into the when the first unidirectional opening and closing element 30 is opened In two sub- cavity P022.

And spring 502 is arranged in the first sub- cavity P021 and motive force can be provided for piston 501, for example, show in Fig. 3 In example, one end of spring 502 offsets with the second end of closed vessel 10, and the other end and the piston 501 of spring 502 offset, and work as work Plug 501 to the second end of closed vessel 10 slide when, then by compression, volume reduces the first sub- cavity P021, and the second sub- cavity P022 is released and volume increases, and when piston 501 is slided to the first end of closed vessel 10, then the second sub- cavity P022 is pressed Contract and volume reduction, the first sub- cavity P021 is released and volume increases.

3rd unidirectional opening and closing element 60 is for controlling the return port 202 on separator 20 to open and close, specifically, working as When fluid pressure in second sub- cavity P022 is more than third predetermined value, then the 3rd unidirectional opening and closing element 60 is opened, now, backflow Hole 202 is opened, and the liquid in the second sub- cavity P022 is back to diversion cavity P01, then is injected from diversion cavity P01 through injection needle 300 In human body.When the fluid pressure in the second sub- cavity P022 is less than third predetermined value, then the 3rd unidirectional opening and closing element 60 is closed, Now, the liquid in the second sub- cavity P022 can not be back to diversion cavity P01.

When being injected using syringe 200, the liquid in the first liquid outlet 2101 of syringe 200 is unidirectionally opened by second After closing member 40, diversion cavity P01 is flowed into, (is more than first predetermined value) when the fluid pressure in diversion cavity P01 is larger, this When, the first unidirectional opening and closing element 30 is opened (as shown in Figure 4), and a part of liquid enters to the second sub- cavity by escape orifice 201 P022, as the fluid pressure in the second sub- cavity P022 gradually increases, its internal liquid promotes piston 501 to closed vessel 10 The second end slide, now, the first sub- cavity P021 volume is gradually reduced, and its internal spring 502 is gradually compressed, spring The motive force that 502 pairs of pistons 501 are produced gradually increases, and the second sub- cavity P022 volume gradually increases, the liquid of accumulation by It is cumulative many.And the fluid pressure in the diversion cavity P01 reduces (such as syringe 200 close to or injected completion) to being less than During the motive force of spring 502, now, spring 502 discharges, and promotes piston 501 to be slided to the first end of closed vessel 10, now, Compressed in second sub- cavity P022, volume is gradually reduced, and internal liquid pressure gradually increases, when its internal liquid pressure is more than Third predetermined value, the 3rd unidirectional opening and closing element 60 is opened, and return port 202 is opened (as shown in Figure 5), the liquid in the second sub- cavity P022 Body can be back in diversion cavity P01 by the return port 202, then is injected from diversion cavity P01 through injection needle 300 in human body, by This, it is possible to achieve the partially liq entered in the second sub- cavity P022 is refilled to human body, reduce drug waste and Error in dipping.

It should be noted that because the first unidirectional opening and closing element 30 is along the sub- cavity P022 of diversion cavity P01 to second direction One-way conduction, and the 3rd unidirectional opening and closing element 60 is the direction one-way conduction along the second sub- cavity P022 to diversion cavity P01, institute So that when the first unidirectional opening and closing element 30 is opened, the 3rd unidirectional opening and closing element 60 is to close, and the 3rd unidirectional opening and closing element 60 is opened When, the first unidirectional opening and closing element 30 is to close, and be that is to say, when escape orifice 201 is opened, and return port 202 is to close, and return port During 202 opening, escape orifice 201 is to close, so, it can be ensured that escape orifice 201 remains different shapes from return port 202 State, it is ensured that separating liquid is released independent of one another with liquid backflow.

Favourable, in one embodiment of the invention, closed vessel 10 is formed as hollow cylindrical, the separator 20 Be formed as both ends open and the cylinder being coaxially disposed with the closed vessel 10, one end of the cylinder and the receiver hole 1021 One end away from the syringe 200 is communicated, and the other end of the cylinder is communicated with second liquid outlet 1011.

That is, inner barrel cylindrical space part is defined to diversion cavity P01, and cylinder is outer between closed vessel 10 Annular space part is defined to cushion chamber P02, in this way, structure is simpler compact, and cushion chamber P02 and diversion cavity P01, which is arranged, to be closed Reason, is convenient to realization and is connected between syringe 200, injection needle 300.

Corresponding, piston 501 is arranged outside the cylinder and is brought into close contact with the outer wall of the cylinder, that is to say, that piston 501 center opens up through hole, is set on using the through hole outside cylinder, realizes the connection between piston 501 and cylinder, meanwhile, lead to It is brought into close contact between the hole wall and cylinder body outer wall in hole, it is possible to achieve sealing, reduces liquid leakage.When spring 502 provides motive force Promote first end from piston 501 to closed vessel 10 slide when, the piston 501 can be successfully by liquid in the second sub- cavity P022 Body is extruded into diversion cavity P01 via return port 202.

Refer to shown in Fig. 2 to Fig. 4, in one particular embodiment of the present invention, closed vessel 10 include cup 101 and Closure 102, one end of the cup 101 is provided with second liquid outlet 1011, and the other end of the cup 101 is opening End；The closure 102 is threadedly coupled with the openend, and the closure 102 is provided with the receiver hole 1021.

In assembling, first separator can be installed in cup 101, then spring 502 and piston 501 are attached to cup In 101, finally, then closure 102 with cup 101 is connected sealing, in this way, its assembling is simple and convenient, moreover, it is simple in construction, Good airproof performance.

Exemplary, described one end of cup 101 is provided with inwardly projecting hickey, the other end of the cylinder It is threadedly coupled with the hickey, described one end of the cylinder is brought into close contact with the closure 102.That is, cylinder To threadedly connecting between body and cup 101, so, on the one hand, can to assemble simpler convenience, the opposing party May insure after face, connection can diversion cavity P01 can be connected with the second liquid outlet 1011.

Alternatively, each in the first unidirectional opening and closing element 30, the second unidirectional opening and closing element 60 of unidirectional opening and closing element 40 and the 3rd For check valve sheet, using check valve sheet, its is simple in construction, thinner thickness, easy for installation, disclosure satisfy that the requirement of one-way conduction.

The injection device shown in Fig. 6 to Fig. 8, provided according to embodiments of the present invention is provided, including syringe 200, as above State the isolation current limiter and injection needle 300 described in embodiment.

Wherein, syringe 200 includes injection tube 210 and plunger rod 220, and the injection tube 210 has circulation passage, near-end And distal end, the distal end is slidably installed with the first liquid outlet 2101 communicated with the fluid passage, the plunger rod 220 In injection tube 210.

The receiver hole 1021 of isolation current limiter is plugged with first liquid outlet 2101.

Injection needle 300 is plugged with second liquid outlet 1011 for isolating current limiter.

The injection device provided according to embodiments of the present invention, with above-mentioned Isolation protector 100, so, in injection, Syringe 200 will not be polluted, reduce the infection risk caused by syringe 200.Furthermore, it is possible to play a protective role, The sense of discomfort caused by the too fast flow caused of pushing is excessive is prevented to a certain extent.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification Close and combine.

The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every at this Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/use indirectly It is included in other related technical fields in the scope of patent protection of the present invention.

Claims (10)

1. a kind of Isolation protector, is adapted to attach between syringe and injection needle, it is characterised in that including：

Closed vessel, the closed vessel has chamber, first end and the second end, and the first end, which is provided with, to be suitable to and the injection The receiver hole that the first liquid outlet on device is plugged, second end, which is provided with, to be suitable to go out liquid with the injection needle is plugged second Mouth；

Separator, the separator is arranged in the closed vessel, and the chamber is divided into diversion cavity and cushion chamber, institute State diversion cavity to communicate with the receiver hole and the second liquid outlet, the separator is provided with the cushion chamber and the diversion cavity The escape orifice of connection；

First unidirectional opening and closing element, the first unidirectional opening and closing element is arranged on the separator and closes the escape orifice, and by It is configured to when the fluid pressure in the diversion cavity is more than first predetermined value, along the diversion cavity to the direction of the cushion chamber Unidirectionally open the escape orifice.

2. Isolation protector according to claim 1, it is characterised in that also include：

Second unidirectional opening and closing element, the one end of the receiver hole away from the syringe is blind end, and the blind end is provided with out liquid Hole, the second unidirectional opening and closing element is arranged at the blind end and closes the fluid hole, and is configured to when described first goes out When fluid pressure in liquid mouth is more than second predetermined value, unidirectionally opened along the fluid hole to the direction of the diversion cavity described in go out Fluid apertures.

3. Isolation protector according to claim 1, it is characterised in that the second predetermined value is less than described first and made a reservation for Value.

4. Isolation protector according to claim 2, it is characterised in that also include：

Piston component, the piston component includes piston and spring, and the piston is slidably installed in the cushion chamber and by institute State cushion chamber and be isolated into the first sub- cavity and the second sub- cavity, the spring is arranged at described be arranged in the described first sub- cavity And motive force is provided for the piston, the second sub- cavity is communicated with the escape orifice；The separator is provided with will be described The return port that second sub- cavity is connected with the diversion cavity；

3rd unidirectional opening and closing element, the 3rd unidirectional opening and closing element is arranged at the separator and closes the return port, and by structure Cause when the fluid pressure in the described second sub- cavity is more than third predetermined value, along the described second sub- cavity to the diversion cavity Direction unidirectionally open the return port.

5. Isolation protector according to claim 1, it is characterised in that the closed vessel is formed as hollow circuit cylinder Shape, the separator is formed as both ends open and the cylinder being coaxially disposed with the closed vessel, one end of the cylinder and institute State the one end of receiver hole away from the syringe to communicate, the other end of the cylinder is communicated with second liquid outlet.

6. Isolation protector according to claim 5, it is characterised in that the piston be arranged the cylinder it is outer and with institute The outer wall for stating cylinder is brought into close contact.

7. Isolation protector according to claim 5, it is characterised in that the closed vessel includes cup and sealing Lid, one end of the cup is provided with second liquid outlet, and the other end of the cup is openend；The closure with it is described Openend is threadedly coupled, and the closure is provided with the receiver hole.

8. Isolation protector according to claim 7, it is characterised in that described one end of the cup is provided with to convex The hickey gone out, the other end of the cylinder is threadedly coupled with the hickey, described one end of the cylinder with The closure is brought into close contact.

9. Isolation protector according to claim 3, it is characterised in that the first unidirectional opening and closing element, second unidirectional Each in opening and closing element and the 3rd unidirectional opening and closing element is check valve sheet.

10. a kind of injection device, it is characterised in that including：

Syringe, the syringe includes injection tube and plunger rod, and the injection tube has circulation passage, near-end and distal end, institute Stating distal end has the first liquid outlet communicated with the fluid passage, and the plunger rod is slidably installed in injection tube；

Isolate current limiter as any one of claim 1 to 9, the receiver hole of the isolation current limiter and described first goes out liquid Mouth is plugged；

Injection needle, the injection needle is plugged with second liquid outlet for isolating current limiter.