CN208770571U - Syringe - Google Patents

Abstract

The utility model provides a kind of syringe, including housing and pushing cylinder, pushing cylinder are movably disposed in housing, and pushing cylinder has pushing cylinder chamber, syringe further include: slider, it is intracavitary that slider along the extending direction of pushing cylinder is slidably disposed on pushing cylinder；Locking bed, locking bed are removably set on slider, and the syringe needle of syringe is removably mounted on locking bed；Liquid-proof circle is set on locking bed to liquid-proof circle position-adjustable, with clamping or release locking bed；Wherein, the top of pushing cylinder is provided with pushing part, pushing part is matched with liquid-proof circle, to push liquid-proof circle mobile to discharge locking bed when pushing part is mobile, after locking bed and slider locking, make locking bed drive needle retractable intracavitary to pushing cylinder under the drive of slider, solves the problems, such as that the syringe needle of syringe in the prior art is exposed using the syringe of the utility model and be easy to stab medical staff.

Description

Syringe

Technical field

The utility model relates to medical instruments fields, in particular to a kind of syringe.

Background technique

Syringe is a kind of most basic medical instrument, in order to reduce propagation of the blood borne disease in patient, including I Countries in the world including state are made laws one after another forces to promote the use of disposible safety syringe.

At this stage, common disposable syringe is generally existing may be reused and not have safety device, needle after injection It manages the defects of exposed, is on the one hand easily utilized by criminal or drug addiction gentleman, it on the other hand will be originally only disposable Syringe reuse, easily cause viral transmission and cross-infection.

Stab medical staff in collecting treatment process for syringe needle after preventing the use of disposable syringe, cause hepatitis B, The propagation of the diseases such as hepatitis, AIDS draws and sends out medical staff's infection, and various countries nurse and receipts disabled person person are injected outside device syringe needle Reveal and be wounded by stabbing, is more than global about 10,000,000 people.

Utility model content

The main purpose of the utility model is to provide a kind of syringes, to solve the syringe needle of syringe in the prior art It is exposed to be easy the problem of stabbing medical staff.

To achieve the goals above, one aspect according to the present utility model, provides a kind of syringe, including housing and Pushing cylinder, pushing cylinder are movably disposed in housing, and pushing cylinder has pushing cylinder chamber, syringe further include: slider, slider is along pushing cylinder Extending direction to be slidably disposed on pushing cylinder intracavitary；Locking bed, locking bed are removably set on slider, syringe Syringe needle is removably mounted on locking bed；Liquid-proof circle is set on locking bed to liquid-proof circle position-adjustable, with clamping or releases Put locking bed；Wherein, the top of pushing cylinder is provided with pushing part, and pushing part is matched with liquid-proof circle, to push away when pushing part is mobile Dynamic liquid-proof circle is mobile to discharge locking bed, to make locking bed band under the drive of slider after locking bed and slider locking Dynamic needle retractable is intracavitary to pushing cylinder.

Further, it is provided with the first limited step on locking bed, is provided at the top of housing and leads balk ring, leads balk ring and One limited step matches, by at least partly limit of locking bed in the cavity of housing.

Further, it leads to surround between balk ring and the inner wall of housing and leads resistance accommodating chamber, liquid-proof circle has locks for clamping The clamping position and releasing position for discharging liquid-proof circle of seat；When liquid-proof circle is located at clamping position, liquid-proof circle is clamped on lock Between tight seat and the inner wall of housing；When liquid-proof circle is located at releasing position, liquid-proof circle move to lead capacitance-resistance receive it is intracavitary.

Further, it is provided with clamping flange on the inner wall of housing, when liquid-proof circle is located at clamping position, liquid-proof circle clamping Between locking bed and clamping flange.

Further, clamping flange have intermediate incline, intermediate incline towards liquid-proof circle be arranged so that liquid-proof circle by When the thrust of pushing part along intermediate incline slide with slide into lead capacitance-resistance receive it is intracavitary.

Further, pushing part is ring bodies, and the top of pushing part is for pushing liquid-proof circle, the bottom of pushing part and pushing cylinder Cylinder connection, pushing cylinder chamber is the barrel chamber of the cylinder of pushing cylinder, and the cavity of pushing part is connected to pushing cylinder chamber, and slider is from pushing cylinder portion Cavity is pierced by；The cavity of pushing part be cone, along close to pushing cylinder chamber direction, the reduced diameter of the cavity of pushing part, So that locking bed is clamped in the cavity of pushing part.

Further, the second limited step is formed between the top of the cylinder of the bottom end and pushing cylinder of pushing part, on slider It is provided with the third limited step for matching with the second limited step, slider is limited intracavitary in pushing cylinder.

Further, be provided with the 4th limited step on slider, syringe further includes elastic component, one end of elastic component with 4th limited step abuts, and the other end of elastic component abuts with the second limited step, with liquid-proof circle with after locking bed disengaging and After locking bed and slider locking, make basal sliding of the slider under the action of the elastic member towards pushing cylinder chamber.

Further, it is provided with clamping head at the top of slider, is provided with tight lock part on locking bed, when clamping head is from locking When being pierced by seat, tight lock part is clamped on clamping head, so that locking bed and slider locking connect.

Further, clamping groove is provided on clamping head, tight lock part is clamped in clamping groove.

Further, tight lock part includes multiple lock sheets, and multiple lock sheets are arranged around the axis interval of locking bed, and clamping is recessed Slot is annular groove, and multiple lock sheets are clamped in clamping groove.

Further, it is provided with the logical liquid ditch flowed through for liquid on clamping head, leads to the cavity of liquid ditch and pushing cylinder chamber and syringe needle It is connected to, so that the intracavitary liquid of pushing cylinder flows into syringe needle after logical liquid ditch.

Further, slider has the liquid containing chamber for being connected to pushing cylinder chamber, leads to liquid ditch and liquid containing chamber connects It is logical, so that logical liquid ditch is connected to by liquid containing chamber with pushing cylinder chamber.

Further, it is provided with mounting ring at the top of housing, the safety cap for being provide with syringe needle is mounted on mounting ring, peace The cavity for filling ring is cylindrical cavity, and the cavity of mounting ring is connected to the cavity of housing.

Further, liquid-proof circle includes main circle body and the liquid-proof flange that is arranged on the inside of main circle body, and main circle body and liquid-proof are convex It is formed between edge and pushes step, pushed step and pushing part to cooperate, push at step so that the top of pushing part is plugged in push away Dynamic liquid-proof circle.

Further, it is provided with support level on slider, the support matched with support level is provided on locking bed Portion, with when pushing part pushes liquid-proof circle mobile, support portion is abutted with support level to push pushing cylinder of the slider towards pushing cylinder Chamber basal sliding.

Using the technical solution of the utility model, for increase locking bed and slider on existing syringe, and to existing There is structure to make the needle for changing come the function of automatic retracted after reaching syringe needle use, and then solving syringe in the prior art Exposed to be easy the problem of stabbing medical staff, the present apparatus is easy to use, easy to operate, at low cost, easy large-scale promotion.

Detailed description of the invention

The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model. In the accompanying drawings:

Fig. 1 is the overall structure diagram of the syringe embodiment of the utility model；

Fig. 2 is the partial enlarged view of the syringe of the utility model；

The slider and locking bed that Fig. 3 is the syringe of the utility model are with needle retractable to the structure of the bottom of pushing cylinder chamber Schematic diagram；

Fig. 4 is the structural schematic diagram of the housing of the syringe of the utility model；

Fig. 4 a is the top view of the housing of the syringe in Fig. 4；

Fig. 5 is the structural schematic diagram of the locking bed of the syringe of the utility model；

Fig. 6 is the structural schematic diagram of the liquid-proof circle of the syringe of the utility model；

Fig. 7 is the structural schematic diagram of the pushing cylinder of the syringe of the utility model；

Fig. 7 a is the top view of the pushing cylinder of the syringe of the utility model；

Fig. 8 is the structural schematic diagram of the slider of the syringe of the utility model；

Fig. 8 a is the top view of the slider of the syringe in Fig. 8；

Fig. 9 is the structural schematic diagram of the rear plug of the syringe of the utility model；

Figure 10 is the structural schematic diagram of the elastic component of the syringe of the utility model；And

Figure 11 is the structural schematic diagram of the piston ring of the syringe of the utility model.

Wherein, the above drawings include the following reference numerals:

1, housing；2, pushing cylinder；3, locking bed；4, liquid-proof circle；5, slider；6, elastic component；7, rear plug；8, piston ring；9, Lead balk ring；11, protruding portion；12, liquid-proof flange；13, main circle body；14, clamping flange；15, the second limited step；16, the 4th limit Position step；17, sliding wall；18, fixed part；19, cavity；20, pushing part；21, clamping head；22, tight lock part；24, groove；25, Logical liquid ditch；26, mounting ring；27, convex block；28, resistance accommodating chamber is led；29, rear end face；30, third limited step；31, the first limit Step；32, safety cap；33, syringe needle；34, support level；35, support portion.

Specific embodiment

It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

The utility model provides a kind of syringe, please refers to Fig. 1 to Figure 11, which includes housing 1 and pushing cylinder 2, Pushing cylinder 2 is movably disposed in housing 1, and pushing cylinder 2 has pushing cylinder chamber, syringe further include: slider 5, slider 5 is along pushing away It is intracavitary that the extending direction of cylinder 2 is slidably disposed on pushing cylinder；Locking bed 3, locking bed 3 are removably set on slider 5, The syringe needle 33 of syringe is removably mounted on locking bed 3；Liquid-proof circle 4 is set in locking bed to 4 position-adjustable of liquid-proof circle On 3, with clamping or release locking bed 3；Wherein, the top of pushing cylinder 2 is provided with pushing part 20, and pushing part 20 and liquid-proof circle 4 match It closes, to push liquid-proof circle 4 mobile to discharge locking bed 3 when pushing part 20 is mobile, to be locked in locking bed 3 and slider 5 Afterwards, make locking bed 3 that syringe needle 33 be driven to bounce back to pushing cylinder under the drive of slider 5 intracavitary.

The syringe of the utility model design has also been devised slider, locking bed and prevents on existing housing and pushing cylinder Liquid circle；Locking bed is set between slider and syringe needle, and syringe needle is connected on locking bed, and the setting of slider is to return to syringe needle Screen resilience is provided when contracting, drives syringe needle retraction pushing cylinder intracavitary, realizes the function of needle retractable, avoid in recycling syringe When, syringe needle is exposed, and be easy to cause the problem of recycling injury to personnel.The design of liquid-proof circle is equivalent to the switch of syringe needle recycling, When liquid-proof circle contacts simultaneously clamping with locking bed, locking bed cannot bounce back, when the pushing part on pushing cylinder top pushes liquid-proof circle and makes When being detached from locking bed, locking bed will drive needle retractable intracavitary to pushing cylinder under the pulling force of slider, so practical It is novel to be advantageous in that whether only control liquid-proof circle and locking bed contacts the retraction of the i.e. controllable syringe needle of clamping, it is easy to operate, It is practical, it is easy to stab medical staff to solve the problems, such as that the syringe needle of syringe in the prior art is exposed.

Preferably, syringe needle 33 is removably mounted on locking bed 3.

In the present embodiment, the first limited step 31 is provided on locking bed 3, the top of housing 1, which is provided with, leads balk ring 9, It leads balk ring 9 to match with the first limited step 31, by at least partly limit of locking bed 3 in the cavity of housing 1.

When syringe injecting fluid, understood under the thrust of pushing cylinder to locking bed one thrust to syringe needle direction, In order to avoid locking bed is pushed out housing, it is provided at the top of housing and leads balk ring, the first limited step is also provided on locking bed, is led Balk ring blocks the first limited step, its object is to prevent locking bed and syringe needle to be pushed out housing, completes syringe smoothly Injection.

In the present embodiment, it leads to surround between balk ring 9 and the inner wall of housing 1 and leads resistance accommodating chamber 28, liquid-proof circle 4, which has, to be used for The clamping position of clamping locking bed 3 and releasing position for discharging liquid-proof circle 4；When liquid-proof circle 4 is located at clamping position, liquid-proof Circle 4 is clamped between locking bed 3 and the inner wall of housing 1；When liquid-proof circle 4 is located at releasing position, liquid-proof circle 4, which moves to, leads capacitance-resistance It receives in chamber 28.

What is be arranged at the top of housing leads balk ring, another effect is that it is surrounded with outer casing inner wall and leads resistance accommodating chamber, leads resistance Accommodating chamber provides the mobile space of liquid-proof circle, when liquid-proof circle is pushed into and leads capacitance-resistance and receive intracavitary, separates, locks with locking bed Seat retraction；This is led resistance accommodating chamber and provides space for the separation of liquid-proof circle and locking bed, and the retraction for completing syringe needle is assisted, and design is skilful It is wonderful.

In the present embodiment, as shown in Fig. 4 and Fig. 4 a, clamping flange 14 is provided on the inner wall of housing 1, when liquid-proof circle 4 When positioned at clamping position, liquid-proof circle 4 is clamped between locking bed 3 and clamping flange 14.

Made by setting clamping flange so that liquid-proof circle contacts closer here with housing and locking bed in the application Liquid-proof circle firmly card primary lock seat is obtained, liquid-proof circle is avoided to horizontally slip, so that card does not live locking bed, leads to syringe needle in injection process The accident of retraction, so the setting of clamping flange avoids the appearance of problems, so that syringe use is safer.

In the present embodiment, clamping flange 14 has intermediate incline, and intermediate incline is arranged towards liquid-proof circle 4, so that liquid-proof Circle 4 is slided in the thrust by pushing part 20 along intermediate incline to slide into and lead in resistance accommodating chamber 28.

For the clamping flange of the application in design, surface is set as inclined face, and the tilt angle of the inclined surface can basis Limited trials obtain, and its object is to prevent when pushing part does not contact and pushes liquid-proof circle, liquid-proof circle is pushed away liquid To leading in resistance accommodating chamber 28, the sliding for being designed as liquid-proof circle of inclined surface provides certain resistance and is complete power lower slider Fixed locked liquid-proof circle, the design principle of inclined surface are as follows: when pushing cylinder injecting fluid, the thrust of liquid can not push liquid-proof circle It is detached from clamping flange, only under the promotion of pushing part, liquid-proof circle disengaging clamping flange could be made to enter to and lead resistance accommodating chamber In 28.

In the present embodiment, pushing part 20 is ring bodies, and the top of pushing part 20 is for pushing liquid-proof circle 4, pushing part 20 Bottom connect with the cylinder of pushing cylinder 2, pushing cylinder chamber is the barrel chamber of the cylinder of pushing cylinder 2, and the cavity of pushing part 20 is connected to pushing cylinder chamber, Slider 5 is pierced by from the cavity 19 of pushing part 20；The cavity 19 of pushing part 20 is that cone is pushed away along the direction close to pushing cylinder chamber The reduced diameter of the cavity in dynamic portion 20, so that slider 5 is clamped in the cavity of pushing part 20.

The cavity 19 of pushing part is designed as cone, as shown in Fig. 2, pushing when placing syringe along the vertical direction Portion's cavity diameter is successively to successively decrease down greatly above, and this design not only facilitates clamping slider, while being conducive to locking bed Support portion enters pushing part cavity, to realize the effect for pushing slider to separate with pushing part cavity.

In the present embodiment, the second limited step 15 is formed between the top of the cylinder of the bottom end of pushing part 20 and pushing cylinder 2, It is provided with the third limited step 30 for matching with the second limited step 15 on slider 5, the limit of slider 5 is being pushed away In barrel chamber.

Second limited step is matched with the third limited step on slider, so that slider will not be from the promotion of pushing cylinder Portion one end is detached from pushing cylinder chamber, and slider is fixed in this position, and ensure that the safe handling of syringe.

In the present embodiment, as shown in Fig. 8 and Fig. 8 a, the 4th limited step 16 is provided on slider 5, syringe also wraps Elastic component 6 is included, one end of elastic component 6 is abutted with the 4th limited step 16, and the other end of elastic component 6 is supported with the second limited step 15 It connects, to make slider 5 in the work of elastic component 6 after liquid-proof circle 4 and locking bed 3 are detached from and after locking bed 3 and the locking of slider 5 With the lower basal sliding towards pushing cylinder chamber.

The slider tail portion of the application is provided with the 4th limited step, sets between the 4th limited step and the second limited step Elastic component is set, when pushing cylinder drives slider to push away toward syringe needle direction, the bottom for shifting locking bed onto is contacted with slider, is pushed away at this time Cylinder is again toward being pushed forward, and locking bed is at least partly abutted with slider, so that locking bed can give one opposite effect power of slider So that slider is detached from pushing part cavity, slider is detached from the rebound of elastic component after the cavity of pushing part, drives slider retraction.

Preferably, elastic component 6 is spring.

In the present embodiment, the top of slider 5 is provided with clamping head 21, and tight lock part 22 is provided on locking bed 3, works as card When tight head 21 is pierced by out of locking bed 3, tight lock part 22 is clamped on clamping head 21, so that locking bed 3 and the locking of slider 5 connect It connects.

Slider is connect by clamping head after cooperating with tight lock part with locking bed, one is formed, to reach associated movement Function.

In the present embodiment, clamping groove is provided on clamping head 21, tight lock part 22 is clamped in clamping groove.

Tight lock part locks the groove in clamping head, more securely, avoids locking bed from being detached from retraction with slider, realizes The tight fit of locking bed and slider.

In the present embodiment, as shown in Figure 8 a, tight lock part 22 includes multiple lock sheets, and multiple lock sheets are around locking bed 3 The setting of axis interval, clamping groove is annular groove, and multiple lock sheets are clamped in clamping groove.

The setting of lock sheet is to cooperate clamping with tight lock part, and multiple lock sheets are clamped in clamping groove, so that sliding Dynamic device gives locking bed thrust by lock sheet in retraction, and locking bed is driven to bounce back together.Lock sheet plays intermal force.

In the present embodiment, the logical liquid ditch 25 flowed through for liquid is provided on clamping head 21, lead to liquid ditch 25 and pushing cylinder chamber and The cavity of syringe needle 33 is connected to, so that the intracavitary liquid of pushing cylinder flows into syringe needle 33 after logical liquid ditch 25.

It so that syringe is circulated injection at clamping head position in injection, be flowed through so being provided with to have herein for liquid Logical liquid ditch 25, logical liquid ditch 25 is connected to the cavity of pushing cylinder chamber and syringe needle 33, so that the intracavitary liquid of pushing cylinder is through leading to liquid ditch 25 It flows into syringe needle 33 afterwards, will not influence normal function of injection.

In the present embodiment, slider 5 has the liquid containing chamber for being connected to pushing cylinder chamber, leads to liquid ditch 25 and holds with liquid Chamber of receiving connection, so that logical liquid ditch 25 is connected to by liquid containing chamber with pushing cylinder chamber.

Logical liquid ditch 25 is connected to liquid containing chamber, so that logical liquid ditch 25 is connected to by the logical chamber of receiving of liquid with pushing cylinder chamber, thus Syringe is realized to flow smoothly during the entire process of injection.

In the present embodiment, the top of housing 1 is provided with mounting ring 26, and the safety cap 32 for being provide with syringe needle 33 is mounted on In mounting ring 26, the cavity of mounting ring 26 is cylindrical cavity, and the cavity of mounting ring 26 is connected to the cavity of housing 1.

The installation for being set as safety needle cap of mounting ring provides connector, and safety cap effectively prevent syringe needle to be exposed Nurse on bundle.

In the present embodiment, liquid-proof circle 4 includes main circle body 13 and the liquid-proof flange 12 that main 13 inside of circle body is arranged in, main circle It is formed between body 13 and liquid-proof flange 12 and pushes step, step and pushing part 20 is pushed to cooperate, so that the top of pushing part 20 is inserted It is located at and pushes at step to push liquid-proof circle 4.

Liquid-proof circle devises main circle body and liquid-proof flange, so that forming a step between the two.Pushing part pushes herein It is moved to control the position of liquid-proof circle, this structure design is so that the cooperation with pushing part is more convenient.

In the present embodiment, it is provided with support level 34 on slider 5, is provided on locking bed 3 and 34 phase of support level The support portion 35 of cooperation, with when pushing part 20 pushes liquid-proof circle 4 mobile, support portion 35 is abutted with support level 34 to push cunning Dynamic pushing cylinder chamber basal sliding of the device 5 towards pushing cylinder.

It requires the length of locking bed to be arranged at a distance from the clamping head to support level on slider during this to be adapted to, with Reach clamping head to be stuck in the tight lock part of locking bed, while there are the anti-sliders that pushes away of the support portion of locking bed to leave pushing cylinder fixed part Distance；It realizes that slider is connect with locking bed, while so that slider is left fixed part just and being retracted under the drive of elastic component The intracavitary function of pushing cylinder.

As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 8, Figure 10, changing needle hair style safety injector uses rear syringe needle Automatic retracted is lock on the convex block 27 of rear plug 7 in the rear end in the pushing cylinder 2 of such as Fig. 3, realizes that syringe needle is not exposed, protection shield Scholar's personal safety prevents to endanger personal safety because syringe needle sharp weapon are exposed.

As shown in Figure 2 and Figure 4, mounting ring 26 is arranged in 1 front end of housing, and mounting ring 26 is arranged and is located at different around locking bed 3 The top of the liquid-proof circle 4 of shape, the liquid-proof flange 12 of special-shaped liquid-proof circle 4 and 11 tight fit of outer diameter protruding portion of locking bed 3, this is prominent Portion 11 is flange shape out, the outer diameter of special-shaped liquid-proof circle 4 and the 14 tight fit interference of clamping flange of 1 front end of housing.When in use, Pushing cylinder 2 is promoted, pushing part 20 promotes the liquid-proof flange 12 of the liquid-proof circle 4 of abnormity toward resistance 28 front end of accommodating chamber is led, and realizes locking Seat 3 is detached from the liquid-proof circle 4 of abnormity, constrains locking bed 3 by any object, plays a role at this time in static elastic component 6, Slider 5 lock onto rear plug 7 together with the related standard needle of locking bed 3.

As shown in Fig. 2, the 18 interference tight fit of fixed part at the top of pushing cylinder 2 and slider 5, slider 5 and elastic component 6 It is positioned after compression, when 2 forward impelling of pushing cylinder, the tight lock part of 21 interference of top clamping head of slider 5 to 3 top of locking bed 22 clampings promote, at this point, 5 interference locking bed 3 of slider starts bounce, make the 18 safe escape pushing cylinder 2 of fixed part of slider 5 Front end.

As shown in Figure 1, Figure 2, Figure 3 shows, slider 5, be mounted on including elastic component 6 the front end chamber central and pushing cylinder of pushing cylinder 2 The mutual interference tight fit of 2 pushing part cavity promotes pushing cylinder 2 simultaneously when nurse uses, is mounted on the slider of 2 front end of pushing cylinder 5 clamping head 21 connects interference with the top tight lock part 22 of the locking bed 3 in the mounting ring 26 for being mounted on housing 1.Also, it is formed Apply a reaction force, meanwhile, as shown in figure 3, forcing the clamping head 21 of slider 5 and the top tight lock part 22 of locking bed 3 The fixed part 18 of interference fastening, simultaneously slider 5 is detached from the pushing part cavity of pushing cylinder 2, is mounted on 2 second limited step 15 of pushing cylinder On elastic component 6 play its elasticity simultaneously.Meanwhile slider 5 together with the related standard needle of locking bed 3 and needle tubing bullet Enter 2 internal locking of pushing cylinder in the convex block 27 of rear plug 7, as shown in figure 3, realizing that syringe needle is not exposed, guaranteeing that nurse will not be by syringe needle sharp weapon It is exposed to stab, cause the pathogenies such as AIDS, hepatitis B, hepatitis to infect, reaches protection nurse's personal safety and prevent syringe use Afterwards because of the exposed harm society of syringe needle sharp weapon, overcome the prior art of safety injector that can not expect, is that the utility model protrusion is wanted Point.

As shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, mounting ring 26, the side of installation locking seat 3, mounting ring 26 is arranged in 1 front end of housing Balk ring 9 is led in circumference setting, provides the guiding of Fig. 5 locking bed 3, is led 9 internal diameter of balk ring and is also set up to lead and hinder accommodating chamber 28, leads resistance accommodating chamber Clamping flange 14 is arranged in 28 rear ends, and the liquid-proof circle 4 for providing abnormity positions, and such as guide capacitance-resistance of liquid-proof circle 4 of abnormity is received when use 28 space propultion of chamber forms locking bed 3, special-shaped liquid-proof circle 4 respectively independently, and structure is simple, is suitable for automated production.

As shown in Fig. 2, Fig. 4, Fig. 5, Fig. 6, protruding portion 11 is arranged in 3 front end of locking bed, and 3 top of locking bed also sets up tight lock part 22,4 interference tight fit of protruding portion 11 and abnormity liquid-proof circle is mounted on the mounting ring 26 of 1 front end of housing, and the balk ring 9 of leading of housing 1 is slided Positioning is implemented in dynamic cooperation, and the rear end face 29 that the first limited step 31 of the protruding portion 11 of locking bed 3 is led balk ring 9 by housing 1 limits Only, prevent from installing excessive, and 3 top of locking bed setting tight lock part 22 implements logical liquid, is using pressurized process, liquid passes through lock The top tight lock part 22 of tight seat 3 flows into human body.

As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, Fig. 4 a, shown in Fig. 7, Fig. 8, Fig. 8 a, Fig. 9, Figure 10, Figure 11, the setting of pushing cylinder 2 pushes Portion's cavity and groove 24,24 ring installation 8 of groove implementation be slidably matched with housing interference, 2 pushing part cavity of pushing cylinder implement and The 18 interference tight fit of fixed part of slider 5, control elastic component 6 discharge elastic force and play, and elastic component 6 is made to use preceding formation static pressure State, pushing cylinder 2 also set up the second limited step 15, to provide cushion cap positioning for slider 5, fixed part 18 and elastic component 6.

As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 5, Fig. 8, Figure 10, logical liquid ditch 25 is arranged in 5 top of slider, leads among liquid ditch 25 Ditch body is implemented by using liquid communication when injection, and the 4th limited step 16, sliding wall 17, fixed part are implemented in 5 rear end of slider 18 and top setting clamping head 21, the 4th limited step 16 of slider 5 place restrictions on the performance of elastic component 6.Preferably, sliding wall 17 is platform Stage structure, sliding wall 17 install elastic component 6 to play guiding role to it.

The pushing part cavity interference control elastic component 6 of fixed part 18 and pushing cylinder 2 plays elasticity, 5 top clamping head of slider 21 force the pushing part cavity of pushing cylinder 2 to be detached from the 22 interference clamping of top tight lock part of locking bed 3 when 2 forward impelling of pushing cylinder The fixed part 18 of slider 5, the sliding wall 17 of slider 5 install elastic component 6 and as guiding.Meanwhile as shown in Figures 2 and 3, Slider 5 and the related standard needle of locking bed 3 are sprung into pushing cylinder by the elasticity that the elastic component 6 in static pressure plays it immediately together In 2, the convex block 27 of the next plug 7 of real-time lock realizes that syringe needle is not exposed.

As shown in Fig. 1, Fig. 3, Fig. 7, Fig. 9, Figure 10,7 center of rear plug setting convex block 27 is installed in the rear end of pushing cylinder 2, after The outer diameter setting of plug 7 and the rear end interference tight fit of pushing cylinder 2 are mounted on the sliding of 2 upper end of pushing cylinder when 2 forward impelling of pushing cylinder The fixed part 18 of device 5, which is pressurized, is detached from the pushing part cavity of pushing cylinder 2, and under the effect of 6 elastic force of elastic component, slider 5 is together with locking bed 3 Related standard needle springs into the convex block 27 of locking rear plug 7 together, prevents from artificially forcing and pull open, syringe needle is caused to be detached from dew, injury Personal safety.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (16)

1. a kind of syringe, including housing (1) and pushing cylinder (2), the pushing cylinder (2) is movably disposed in the housing (1), The pushing cylinder (2) has pushing cylinder chamber, which is characterized in that the syringe further include:

Slider (5), it is intracavitary that the slider (5) along the extending direction of the pushing cylinder (2) is slidably disposed on the pushing cylinder；

Locking bed (3), the locking bed (3) are removably set on the slider (5), the syringe needle (33) of the syringe It is removably mounted on the locking bed (3)；

Liquid-proof circle (4) is set on the locking bed (3) to liquid-proof circle (4) position-adjustable, described in clamping or release Locking bed (3)；

Wherein, the top of the pushing cylinder (2) is provided with pushing part (20), and the pushing part (20) and the liquid-proof circle (4) match It closes, to push the liquid-proof circle (4) mobile to discharge the locking bed (3) when the pushing part (20) are mobile, described After locking bed (3) and the slider (5) locking, make described in the locking bed (3) drives under the drive of the slider (5) It is intracavitary that syringe needle (33) bounces back to the pushing cylinder.

2. syringe according to claim 1, which is characterized in that be provided with the first limited step on the locking bed (3) (31), it is provided with and leads balk ring (9) at the top of the housing (1), it is described to lead balk ring (9) and first limited step (31) matching It closes, by at least partly limit of the locking bed (3) in the cavity of the housing (1).

3. syringe according to claim 2, which is characterized in that the inner wall for leading balk ring (9) and the housing (1) it Between surround and lead resistance accommodating chamber (28), the liquid-proof circle (4) has for the clamping position of locking bed (3) described in clamping and for releasing Put the releasing position of the liquid-proof circle (4)；When the liquid-proof circle (4) is located at the clamping position, liquid-proof circle (4) clamping Between the locking bed (3) and the inner wall of the housing (1)；It is described when the liquid-proof circle (4) is located at the releasing position Liquid-proof circle (4) moves to described lead in resistance accommodating chamber (28).

4. syringe according to claim 3, which is characterized in that be provided with clamping flange on the inner wall of the housing (1) (14), when the liquid-proof circle (4) is located at the clamping position, the liquid-proof circle (4) be clamped on the locking bed (3) with it is described Between clamping flange (14).

5. syringe according to claim 4, which is characterized in that the clamping flange (14) has intermediate incline, described Intermediate incline is arranged towards the liquid-proof circle (4), so that the liquid-proof circle (4) edge in the thrust by the pushing part (20) The intermediate incline sliding is to slide into described lead in resistance accommodating chamber (28).

6. syringe according to claim 1, which is characterized in that the pushing part (20) is ring bodies, the pushing part (20) for pushing the liquid-proof circle (4), the bottom of the pushing part (20) is connect with the cylinder of the pushing cylinder (2) on top, The pushing cylinder chamber is the barrel chamber of the cylinder of the pushing cylinder (2), and the cavity of the pushing part (20) is connected to the pushing cylinder chamber, described Slider (5) is pierced by from the cavity of the pushing part (20)；The cavity of the pushing part (20) is cone, is pushed away along close to described The direction of barrel chamber, the reduced diameter of the cavity of the pushing part (20), so that the locking bed (3) is clamped on the promotion In the cavity in portion (20).

7. syringe according to claim 6, which is characterized in that the bottom end and the pushing cylinder (2) of the pushing part (20) Cylinder top between formed the second limited step (15), be provided on the slider (5) for it is described second limit The third limited step (30) that step (15) matches limits the slider (5) intracavitary in the pushing cylinder.

8. syringe according to claim 7, which is characterized in that be provided with the 4th limited step on the slider (5) (16), the syringe further includes elastic component (6), and one end of the elastic component (6) is abutted with the 4th limited step (16), The other end of the elastic component (6) is abutted with second limited step (15), in the liquid-proof circle (4) and the locking bed (3) after being detached from and after the locking bed (3) and the slider (5) locking, make the slider (5) in the elastic component (6) Under the action of towards the pushing cylinder chamber basal sliding.

9. syringe according to claim 1, which is characterized in that be provided with clamping head at the top of the slider (5) (21), tight lock part (22) are provided on the locking bed (3), when the clamping head (21) is pierced by out of the locking bed (3), The tight lock part (22) is clamped on the clamping head (21), so that the locking bed (3) and the slider (5) locking connect It connects.

10. syringe according to claim 9, which is characterized in that be provided with clamping groove on the clamping head (21), institute Tight lock part (22) is stated to be clamped in the clamping groove.

11. syringe according to claim 10, which is characterized in that the tight lock part (22) includes multiple lock sheets, more A lock sheet is arranged around the axis interval of the locking bed (3), and the clamping groove is annular groove, multiple lock sheets It is clamped in the clamping groove.

12. syringe according to claim 9, which is characterized in that be provided on the clamping head (21) and flowed through for liquid Logical liquid ditch (25), the logical liquid ditch (25) is connected to the cavity of the pushing cylinder chamber and the syringe needle (33), so that described push away Liquid in barrel chamber is flowed into after the logical liquid ditch (25) in the syringe needle (33).

13. syringe according to claim 12, which is characterized in that the slider (5) have for the pushing cylinder The liquid containing chamber of chamber connection, the logical liquid ditch (25) is connected to the liquid containing chamber, so that the logical liquid ditch (25) passes through The liquid containing chamber is connected to the pushing cylinder chamber.

14. syringe according to claim 1, which is characterized in that be provided with mounting ring at the top of the housing (1) (26), it is mounted on the mounting ring (26) for being provide with the safety cap (32) of the syringe needle (33), the mounting ring (26) Cavity is cylindrical cavity, and the cavity of the mounting ring (26) is connected to the cavity of the housing (1).

15. syringe according to claim 1, which is characterized in that the liquid-proof circle (4) includes main circle body (13) and setting Liquid-proof flange (12) on the inside of the main circle body (13) is formed between the main circle body (13) and the liquid-proof flange (12) and is pushed away Dynamic step, the promotion step and the pushing part (20) cooperate, so that the top of the pushing part (20) is plugged in described push away To push the liquid-proof circle (4) at dynamic step.

16. syringe according to claim 1, which is characterized in that be provided with support level on the slider (5) (34), it is provided with the support portion (35) matched with the support level (34) on the locking bed (3), in the pushing part (20) when pushing the liquid-proof circle (4) mobile, the support portion (35) is abutted with the support level (34) to push the cunning The dynamic pushing cylinder chamber basal sliding of device (5) towards the pushing cylinder.