CN209108302U - The injector for medical purpose that anti-needle is stabbed - Google Patents

Abstract

A kind of injector for medical purpose that anti-needle is stabbed, both it had been greater than the internal diameter of front using the internal diameter at the middle part of elastic stripping ring, also greater than the technical characteristic of the internal diameter at rear portion, technical solution between the back cover portion and injection needle of housing is located at using elastic stripping ring and forms the injector for medical purpose that the anti-needle of the utility model is stabbed, it realizes when the middle part of the elastic stripping ring on the cone joint of housing is radially pinched flat, the rear end of the elastic stripping ring of flexible deformation is against in the back cover portion of housing, the front end of the elastic stripping ring of flexible deformation, which is against on the rear end of injection needle, pushes injection needle to move forward, so that injection needle is detached from the cone joint of housing.The technical effect of injection needle will not be touched in operation by reaching the injector for medical purpose that anti-needle is stabbed, so that the injection needle to carry disease germs be avoided to cause harm to the human body.

Description

The injector for medical purpose that anti-needle is stabbed

Technical field

The utility model relates to arrive various injector for medical purpose, various disposable sterilized syringes are related specifically to, Various glass injector for medical purpose are related specifically to, various metal injector for medical purpose is also related specifically to, relates more specifically to various The disposable sterilized syringe that anti-needle is stabbed also relates more specifically to the glass injector for medical purpose stabbed to various anti-needles, Relate more specifically to the metal injector for medical purpose stabbed to various anti-needles.

Background technique

Various injector for medical purpose can be used for injecting and exporting various liquid, can be used for aspirating various liquid, may be used also Can be also used for flushing or cleaning of objects for mixing various liquid or mixing various liquid with powder.It is various medical After plugging injection needle on the conehead of syringe, various medicaments can be injected into human body or the subcutaneous of animal, muscle, blood vessel or its In his histoorgan, various liquid can also be aspirated out of human body or the histoorgan of animal.

Conventional injector for medical purpose includes housing and core bar.It is cased with housing cavity outside.Housing cavity is respectively before housing Open rearward end.There are back cover portion and cone joint in the front of housing.Cone joint is located at the front end in back cover portion.It is various disposable The housing of asepsis injector generally uses the back cover portion on circular cone inclined-plane or the back cover portion of spherical surface.Various glass injector for medical purpose and gold The housing for belonging to injector for medical purpose generally uses the back cover portion of plane.Cone joint can be the cone joint of middle hair style, can also be with For the cone joint of inclined hair style.There is cone head hole in cone joint.Cone head hole and housing cavity penetrate through.It can on the cone joint of housing Injection needle is installed.There is housing crimping at the rear portion of housing.Housing can have enough transparencies.It can be on the outer surface of housing There is volume scale.The rear end of core bar has by hand, and front can have sealing ring.Core bar is inserted into housing from housing cavity open rearward end After in cavity, manipulate core bar can be such that core bar is moved forward and backward in housing cavity by hand.The outer wall of sealing ring and housing cavity Inner wall forms the sealing cooperation of injector for medical purpose.

The unsatisfactory place of conventional injector for medical purpose is, after injector for medical purpose use, the injection needle to carry disease germs it is exposed Outside, it easily causes harm to the human body, also, since the connection of the cone joint of syringe needle and the housing of syringe is tighter, both hands are shed The syringe needle of the injection needle to carry disease germs and the movement for returning the syringe needle for the injection needle that set sheath closure carries disease germs are to cause medical staff that needle occurs The most high-risk movement stabbed.World Health Organization was in a studies have shown that 2010 carried out using latest data in 2014, due to not Safety injection, estimation up to 1,700,000 people have infected hepatitis B, and up to 31.5 ten thousand people have infected Hepatitis C Virus, up to 33800 people have infected AIDS virus, and therefore, World Health Organization urges various countries all to use new " intelligence " syringe instead to the year two thousand twenty. World Health Organization provides detailed suggestion in the injection safety new guidance and policy of publication on 2 23rd, 2015, wherein suggesting infusing Safety device is set in emitter to prevent healthcare workers from turn resulting in infection by needlestick injuries.

The injector for medical purpose that a kind of anti-needle introduced in United States Patent (USP) US20060052748A1 is stabbed, in injector for medical purpose The front of housing have the injection needle housing hinged with housing.When in use, injection needle housing is turned at housing, to appear injection Needle.After use, then by injection needle housing it is turned at injection needle, injection needle is covered, to avoid the injection needle to carry disease germs to human body It damages.The medical injection that a kind of anti-needle introduced in United States Patent (USP) US20150182704A1 and US20160367762A1 is stabbed Emitter, injector for medical purpose have the injection needle housing that can be moved forward and backward on the periphery of housing.When in use, injection needle is covered on into housing Periphery on move backward, to appear injection needle.After use, then injection needle is covered on the periphery of housing and moves forward to note It penetrates at needle, injection needle is covered, caused harm to the human body to avoid the injection needle to carry disease germs.The medical injection that above two anti-needle is stabbed The unsatisfactory place of the first of emitter is, the part of the injector for medical purpose that anti-needle is stabbed than conventional injector for medical purpose part more Mostly more complicated, assembly is also more difficult, therefore cost is higher.It is stabbed according to the investigation of World Health Organization, the anti-needle with injection needle housing The cost of injector for medical purpose is twice or more of the cost of conventional injector for medical purpose.The medical injection that above two anti-needle is stabbed The unsatisfactory place of second of device is that injection needle housing increases injection operation step, also, injection needle housing on the coat can shadow The injection operation for ringing the injector for medical purpose that anti-needle is stabbed, be easy to cause operation error.The medical injection that above two anti-needle is stabbed The third unsatisfactory place of device is the injector for medical purpose of the plastics for the injector for medical purpose that anti-needle is stabbed and the injection needle of metal It is fixed together, before use, the injection needle of other specifications can not be replaced；Overall volume after use is larger, to subsequent pin It ruins processing to make troubles, also, can not be by plastic material and metal material classification recovery processing.The doctor that above two anti-needle is stabbed It is that injection is installed on various glass injector for medical purpose and metal injector for medical purpose with the 4th kind of unsatisfactory place of syringe The cost of needle housing is higher, and sterilizing is extremely difficult to before use and is required.

By above-mentioned it will be clear that well known injector for medical purpose also needs to be improved further, so that injector for medical purpose Cost it is lower, injector for medical purpose convenience more secure when used, injector for medical purpose is easier to recycle or destroy after.

Utility model content

First purpose of the utility model is to propose a kind of injector for medical purpose that anti-needle is stabbed, using elastic stripping ring The internal diameter at middle part be both greater than front internal diameter, also greater than rear portion internal diameter technical characteristic, housing is located at using elastic stripping ring Back cover portion and injection needle between technical solution form the injector for medical purpose that the anti-needle of the utility model is stabbed, housing is worked as in realization Cone joint on the middle part of elastic stripping ring when radially being pinched flat, the rear end of the elastic stripping ring of flexible deformation is against housing Back cover portion on, the front end of the elastic stripping ring of flexible deformation be against on the rear end of injection needle push injection needle move forward, make Obtain the cone joint that injection needle is detached from housing.Injection will not be touched in operation by reaching the injector for medical purpose that anti-needle is stabbed The technical effect of syringe needle, so that the injection needle to carry disease germs be avoided to cause harm to the human body.Due to the internal diameter at the middle part of elastic stripping ring Both it had been greater than internal diameter, the internal diameter also greater than rear portion of front, therefore has only needed the power of very little can be by the front and rear part quilt of elastic stripping ring Opposite compression, does not influence the operation that injection needle is inserted on the cone joint of housing；When the middle part of elastic stripping ring radially pinched it is flat When, it is squeezed between its front and rear in the middle part of elastic stripping ring, so that the axial length elongation of elastic stripping ring, rigidity Increase, the cone joint of housing is detached from after moving forward convenient for promotion injection needle.The elasticity covered on the cone joint of housing is torn open Unloading ring will not influence the injection operation for the injector for medical purpose that anti-needle is stabbed, and also not increase injection operation step.

Second purpose of the utility model is to propose a kind of injector for medical purpose that anti-needle is stabbed, so that the doctor that anti-needle is stabbed With the part of a syringe only elastic stripping ring covered on the cone joint of housing more than the part of conventional injector for medical purpose. The cost of elastic stripping ring is lower than the 5% of the cost for the injector for medical purpose that anti-needle is stabbed, assembles also very convenient.Elastic stripping ring can It can group with the upper elastic stripping ring of set directly on the cone joint of the housing of conventional various disposable sterilized syringes The disposable sterilized syringe stabbed at anti-needle.The disposable sterilized syringe that anti-needle is stabbed, before use, can be with Replace the injection needle of other specifications；After use, the injector for medical purpose of the metal injection needle and plastics that carry disease germs can be classified and is put Enter in collecting box, by plastic material and metal material classification recovery processing or subsequent destroys.Conventional various glass are medical Syringe and metal injector for medical purpose can carry out conventional cleaning, sterilization treatment using preceding, when in use in the circle of housing Elastic stripping ring is put on taper joint constitutes the glass injector for medical purpose that anti-needle is stabbed and the metal medical injection that anti-needle is stabbed Emitter destroys elastic stripping ring and injection needle after use.The injector for medical purpose stabbed due to the anti-needle of the utility model Conventional various disposable sterilized syringes, various glass injector for medical purpose or various metal medical injections can be used directly Conventional housing, core bar and injection needle in device, therefore the technology and equipment of existing processing, assembly and packaging can be directly used, To reduce product cost, also, conventional injection needle is not influenced and can be not only used for the various medical injections with outer cone locked joints Emitter can be used for various injector for medical purpose without outer cone locked joints again.

The purpose of this utility model is achieved through the following technical solutions:

The injector for medical purpose that the anti-needle of the utility model is stabbed includes housing and core bar.There are back cover portion and circle in the front of housing Taper joint.Cone joint is located at the front end in back cover portion.The housing of various disposable sterilized syringes generally uses cone inclined The back cover portion in face or the back cover portion of spherical surface.The housing of various glass injector for medical purpose and metal injector for medical purpose generally uses plane Back cover portion.It is cased with housing cavity outside.The housing cavity end opening before and after housing respectively.During the cone joint of housing can be The cone joint of hair style, or the cone joint of inclined hair style.There is cone head hole in cone joint.Cone head hole is passed through with housing cavity It is logical.There is housing crimping at the rear portion of housing.There can be volume scale on the outer surface of housing.

The rear end of core bar has by hand, and front can have sealing ring.Core bar is inserted into housing sky from housing cavity open rearward end After intracavitary, manipulate core bar can be such that core bar is moved forward and backward in housing cavity by hand.Monoblock type can be made with core bar in sealing ring, It can also be made with core bar split type.The sealing that the outer wall of sealing ring and the inner wall of housing cavity form injector for medical purpose cooperates.

Injection needle and elasticity can be plugged on the cone joint of the housing for the injector for medical purpose that the anti-needle of the utility model is stabbed Stripping ring.Elastic stripping ring is located between the back cover portion and injection needle of housing.Before the internal diameter at the middle part of elastic stripping ring is both greater than The internal diameter in portion, the internal diameter also greater than rear portion.When the middle part of the elastic stripping ring on the cone joint of housing is radially pinched flat, bullet Property deformation the rear end of elastic stripping ring be against in the back cover portion of housing, the front end of the elastic stripping ring of flexible deformation is against injection Injection needle is pushed to move forward on the rear end of needle, so that injection needle is detached from the cone joint of housing.

Before the elastic stripping ring for the injector for medical purpose that the anti-needle of the utility model is stabbed can be on the cone joint of housing After move.When injection needle and elastic stripping ring are inserted on the cone joint of housing, the circular cone that injection needle is connected housing is connect On head, elastic stripping ring is located between the back cover portion and injection needle of housing.When the elastic stripping ring on the cone joint of housing When middle part is radially pinched flat, the rear end of the elastic stripping ring of flexible deformation is against in the back cover portion of housing, the elasticity of flexible deformation The front end of stripping ring, which is against on the rear end of injection needle, pushes injection needle to move forward, so that the circular cone that injection needle is detached from housing connects Head.

The internal diameter of the front of elastic stripping ring can be less than the outer diameter of the cone joint of housing.When the front of elastic stripping ring Inside diameter elastomeric deformation after when being inserted on the cone joint of housing, elastic stripping ring is constrained on the cone joint of housing, is needed It elastic stripping ring can be just moved forward and backward on the cone joint of housing under the effect of external force.

The internal diameter at the rear portion of elastic stripping ring can be greater than the outer diameter of the cone joint of housing.It can be in the back cover portion of housing There is circular cone inclined-plane.When the middle part of the elastic stripping ring on the cone joint of housing is radially pinched flat, the elasticity of flexible deformation is torn open It unloads the circular cone inclined-plane that the rear end of ring is against in the back cover portion of housing in back cover portion to move, before the elastic stripping ring of flexible deformation End, which is against on the rear end of injection needle, pushes injection needle to move forward, so that injection needle is detached from the cone joint of housing.

The rear portion of the elastic stripping ring for the injector for medical purpose that the anti-needle of the utility model is stabbed can also use clamping, glue Connect, weld or other methods be fixedly mounted on housing back cover portion front.When injection needle is inserted on the cone joint of housing, Injection needle is connected on the cone joint of housing, and elastic stripping ring is located between the back cover portion and injection needle of housing.Work as housing Cone joint on the middle part of elastic stripping ring when radially being pinched flat, the front end of the elastic stripping ring of flexible deformation is against injection Injection needle is pushed to move forward on the rear end of needle, so that injection needle is detached from the cone joint of housing.

The front of the elastic stripping ring for the injector for medical purpose that the anti-needle of the utility model is stabbed can also use clamping, glue It connects, weld or other methods are fixedly mounted on the rear portion of injection needle.When injection needle is inserted on the cone joint of housing, injection needle It is connected on the cone joint of housing, elastic stripping ring is located between the back cover portion and injection needle of housing.It is injected when being mounted on When the middle part of the elastic stripping ring at the rear portion of needle is pinched flat, the rear end of the elastic stripping ring of flexible deformation is against the back cover portion of housing On, the front end of the elastic stripping ring of flexible deformation, which is against on the rear end of injection needle, pushes injection needle to move forward, so that injection needle It is detached from the cone joint of housing.

Detailed description of the invention

Fig. 1 is the outside drawing for the injector for medical purpose for indicating that the anti-needle of the utility model first embodiment is stabbed；

Fig. 2 is injection when the middle part of the elastic stripping ring for the injector for medical purpose for indicating that the anti-needle of Fig. 1 is stabbed radially is pinched flat Outside drawing after needle forward movement；

Fig. 3 is the front view for the injector for medical purpose for indicating that the anti-needle of Fig. 1 is stabbed；

Fig. 4 is the 3-3 cross-sectional view for indicating Fig. 3；

Fig. 5 is the front view for the injector for medical purpose for indicating that the anti-needle of Fig. 2 is stabbed；

Fig. 6 is the 5-5 cross-sectional view for indicating Fig. 5；

Fig. 7 is the outside drawing for indicating the housing and core bar of Fig. 1；

Fig. 8 is the outside drawing for indicating the injection needle of Fig. 1；

Fig. 9 is the outside drawing for indicating the elastic stripping ring of Fig. 1；

Figure 10 is the outside drawing indicated when the middle part of the elastic stripping ring of Fig. 2 is radially pinched flat；

Figure 11 is that the elastic stripping ring use for the injector for medical purpose for indicating that the anti-needle of Fig. 1 is stabbed is bonded or welded fixed installation Outside drawing at the front in the back cover portion of housing；

Figure 12 is to indicate that the front in the back cover portion in housing of Figure 11 uses to be bonded or welded the elastic stripping ring of fixed installation The outside drawing of injector for medical purpose stabbed of anti-needle；

Figure 13 is that the elastic stripping ring for the injector for medical purpose for indicating that the anti-needle of Fig. 1 is stabbed is mounted on injection using connecting and fixing Outside drawing when on the locked joints of the rear end of needle；

Figure 14 is to indicate the elastic stripping ring of Figure 13 using on the locked joints for connecting and fixing the rear end for being mounted on injection needle When outside drawing；

Figure 15 is the outside drawing for indicating the elastic stripping ring of Figure 14；

Figure 16 is the outside drawing for the injector for medical purpose for indicating that the anti-needle of the utility model second embodiment is stabbed；

Figure 17 is note when the middle part of the elastic stripping ring for the injector for medical purpose for indicating that the anti-needle of Figure 16 is stabbed radially is pinched flat Penetrate the outside drawing after needle moves forward；

Figure 18 is the front view for the injector for medical purpose for indicating that the anti-needle of Figure 16 is stabbed；

Figure 19 is the 18-18 cross-sectional view for indicating Figure 18；

Figure 20 is the front view for the injector for medical purpose for indicating that the anti-needle of Figure 17 is stabbed；

Figure 21 is the 20-20 cross-sectional view for indicating Figure 20；

Figure 22 is the outside drawing for indicating the housing and core bar of Figure 16；

Figure 23 is the outside drawing for indicating the injection needle of Figure 16；

Figure 24 is the outside drawing for indicating the elastic stripping ring of Figure 16；

Figure 25 is the outside drawing indicated when the middle part of the elastic stripping ring of Figure 17 is radially pinched flat；

Figure 26 is the outside drawing for the injector for medical purpose for indicating that the anti-needle of the utility model 3rd embodiment is stabbed；

Figure 27 is note when the middle part of the elastic stripping ring for the injector for medical purpose for indicating that the anti-needle of Figure 26 is stabbed radially is pinched flat Penetrate the outside drawing after needle moves forward；

Figure 28 is the front view for the injector for medical purpose for indicating that the anti-needle of Figure 26 is stabbed；

Figure 29 is the 28-28 cross-sectional view for indicating Figure 28；

Figure 30 is the front view for the injector for medical purpose for indicating that the anti-needle of Figure 27 is stabbed；

Figure 31 is the 30-30 cross-sectional view for indicating Figure 30；

Figure 32 is the outside drawing for indicating the housing and core bar of Figure 26；

Figure 33 is the outside drawing for indicating the injection needle of Figure 26；

Figure 34 is the outside drawing for indicating the elastic stripping ring of Figure 26；

Figure 35 is the outside drawing indicated when the middle part of the elastic stripping ring of Figure 27 is radially pinched flat；

Figure 36 is the outside drawing for the injector for medical purpose for indicating that the anti-needle of the utility model fourth embodiment is stabbed；

Figure 37 is note when the middle part of the elastic stripping ring for the injector for medical purpose for indicating that the anti-needle of Figure 36 is stabbed radially is pinched flat Penetrate the outside drawing after needle moves forward；

Figure 38 is the front view for the injector for medical purpose for indicating that the anti-needle of Figure 36 is stabbed；

Figure 39 is the 38-38 cross-sectional view for indicating Figure 38；

Figure 40 is the front view for the injector for medical purpose for indicating that the anti-needle of Figure 37 is stabbed；

Figure 41 is the 40-40 cross-sectional view for indicating Figure 40；

Figure 42 is the outside drawing for indicating the housing and core bar of Figure 36；

Figure 43 is the outside drawing for indicating the injection needle of Figure 36；

Figure 44 is the outside drawing for indicating the elastic stripping ring of Figure 36；

Figure 45 is the outside drawing indicated when the rear portion of the elastic stripping ring of Figure 37 is pinched flat.

Specific embodiment

Way of example is used below, and the best implementation for the injector for medical purpose that the anti-needle of the utility model is stabbed is stated in conjunction with attached drawing Example.The scope of the utility model will be indicated in the claims.It should be appreciated that some or all attached drawing is provided to illustrate this The most preferred embodiment of utility model illustrates schematic diagram, and does not depict the full-size(d) of shown part.With reference to most preferred embodiment Detailed narration, it will be more clearly understood and reach that the utility model is above-mentioned and the practical side of other objects and advantages Formula.In the the accompanying drawings and the following description, term " rear " refers to close to the position of injector for medical purpose operator, and term " preceding " refers to Position far from injector for medical purpose operator.The term in other positions and direction can come with following description further with reference to the accompanying drawings Understand.

Fig. 1 to Figure 10 is the injector for medical purpose 1 for indicating the anti-needle of the utility model first embodiment and stabbing.

As shown in Figure 1 and Figure 7, there are housing 2 and core bar 3 in the injector for medical purpose 1 that anti-needle is stabbed.There is envelope in the front of housing 2 The cone joint 5 of bottom 4 and middle hair style.Cone joint 5 is located at the front end in back cover portion 4.Opening of the core bar 3 from 2 rear end of housing After being inserted into housing 2, core bar 3 can be manipulated and be moved forward and backward in housing 2.The injector for medical purpose 1 that anti-needle is stabbed can be middle capacity The disposable sterilized syringe stabbed of anti-needle.

Injection needle 6 and elastic stripping ring 7 can be plugged on the cone joint 5 of housing 2.Elastic stripping ring 7 is located at the envelope of housing 2 (see Fig. 1) between bottom 4 and injection needle 6.The internal diameter at the middle part 8 of elastic stripping ring 7 had both been greater than the internal diameter of front 9, also greater than rear The internal diameter (see Fig. 9) in portion 10.Elastic stripping ring 7 can be moved forward and backward on the cone joint 5 of housing 2.When injection needle 6 and elasticity are torn open When unloading ring 7 and being inserted on the cone joint 5 of housing 2, injection needle 6 is connected on the cone joint 5 of housing 2, elastic stripping ring 7 (see Fig. 1, Fig. 3 and Fig. 4) between the back cover portion 4 and injection needle 6 of housing 2.When the elasticity disassembly on the cone joint 5 of housing 2 When the middle part of ring 7 is radially pinched flat, the rear end of the elastic stripping ring 7 of flexible deformation is against in the back cover portion 4 of housing 2, and elasticity becomes The front end of the elastic stripping ring 7 of shape, which is against on the rear end of injection needle 6, pushes injection needle 6 to move forward, so that injection needle 6 is detached from outside The cone joint 5 of set 2 (see Fig. 2, Fig. 5, Fig. 6 and Figure 10).

The internal diameter of the front 9 of elastic stripping ring 7 is less than the outer diameter of the cone joint 5 of housing 2.Before elastic stripping ring 7 When being inserted on the cone joint 5 of housing 2 after the inside diameter elastomeric deformation in portion 9, the circular cone that elastic stripping ring 7 is constrained on housing 2 is connect On first 5, need under the effect of external force elastic stripping ring 7 can just be moved forward and backward and (see Fig. 1, scheme on the cone joint 5 of housing 2 3, Fig. 4 and Fig. 9).

The internal diameter at the rear portion 10 of elastic stripping ring 7 is greater than the outer diameter of the cone joint 5 of housing 2.In the back cover portion 4 of housing 2 There is circular cone inclined-plane 11 (see Fig. 7).When the middle part 8 of the elastic stripping ring 7 on the cone joint 5 of housing 2 is radially pinched flat, elasticity The rear end of the elastic stripping ring 7 of deformation is against the circular cone inclined-plane 11 in the back cover portion 4 of housing 2 in back cover portion 4 and moves, and elasticity becomes The front end of the elastic stripping ring 7 of shape is against on the rear end of injection needle 6 and moves before promotion injection needle 6, so that injection needle 6 is detached from housing 2 cone joint 5 (see Fig. 2, Fig. 5, Fig. 6 and Figure 10).

After Figure 11 and Figure 12 is the elastic stripping ring 13 for the injector for medical purpose 12 for indicating that the anti-needle of the utility model is stabbed Portion 14 is using the front end for being bonded or welded the back cover portion 4 for being fixedly mounted on housing 2.When injection needle 6 is inserted in the cone joint of housing 2 When on 5, injection needle 6 is connected on the cone joint 5 of housing 2, and elastic stripping ring 13 is located at back cover portion 4 and the injection of housing 2 Between needle 6.When the middle part 15 of the elastic stripping ring 13 on the cone joint 5 of housing 2 is radially pinched flat, the elasticity of flexible deformation The front end 16 of stripping ring 13, which is against on the rear end of injection needle 6, pushes injection needle 6 to move forward, so that injection needle 6 is detached from housing 2 Cone joint 5.

Before Figure 13 to Figure 15 is the elastic stripping ring 22 for the injector for medical purpose 21 for indicating that the anti-needle of the utility model is stabbed Portion 23 is connected and fixed using bayonet 24 and is mounted on the locked joints 25 at the rear portion of injection needle 6 (see Fig. 8).When injection needle 6 is inserted in When on the cone joint 5 of housing 2, injection needle 6 is connected on the cone joint 5 of housing 2, and elastic stripping ring 22 is located at housing 2 Back cover portion 4 and injection needle 6 between.When the middle part 26 of the elastic stripping ring 22 at the rear portion for being mounted on injection needle 6 radially pinched it is flat When, the rear portion 27 of the elastic stripping ring 22 of flexible deformation is against in the back cover portion 4 of housing 2, the elastic stripping ring 22 of flexible deformation Front 23 be against on the rear end of injection needle 6 push injection needle 6 move forward so that injection needle 6 be detached from housing 2 cone joint 5。

Figure 16 to Figure 25 is the injector for medical purpose 31 for indicating the anti-needle of the utility model second embodiment and stabbing.

As shown in Figure 16 and Figure 22, there are housing 32 and core bar 33 in the injector for medical purpose 31 that anti-needle is stabbed.Before housing 32 There is the cone joint 35 of back cover portion 34 and inclined hair style in portion.The back cover portion 34 of housing 32 is spherical.Cone joint 35 is located at back cover portion 34 front end.After core bar 33 is out of the opening of 32 rear end of housing insertion housing 32, the front and back in housing 32 of core bar 33 can be manipulated It is mobile.The injector for medical purpose 31 that anti-needle is stabbed can be the disposable nothing that the anti-needle for the large capacity that housing is relatively large in diameter is stabbed Bacterium syringe.

Injection needle 36 and elastic stripping ring 37 can be plugged on the cone joint 35 of housing 32.Elastic stripping ring 37 is located at housing (see Figure 16) between 32 back cover portion 34 and injection needle 36.The internal diameter at the middle part 38 of elastic stripping ring 37 had both been greater than the interior of front 39 Diameter, the internal diameter also greater than rear portion 40 (see Figure 24).Elastic stripping ring 37 can be moved forward and backward on the cone joint 35 of housing 32.When When injection needle 36 and elastic stripping ring 37 are inserted on the cone joint 35 of housing 32, injection needle 36 is connected the circular cone of housing 32 On connector 35, elastic stripping ring 37 is located between the back cover portion 34 and injection needle 36 of housing 32 (see Figure 16, Figure 18 and Figure 19).When When the middle part of elastic stripping ring 37 on the cone joint 35 of housing 32 is radially pinched flat, the elastic stripping ring 37 of flexible deformation Rear end is against in the back cover portion 34 of housing 32, and the rear end that the front end of the elastic stripping ring 37 of flexible deformation is against injection needle 36 above pushes away Dynamic injection needle 36 moves forward, so that injection needle 36 is detached from the cone joint 35 of housing 32 (see Figure 17, Figure 20, Figure 21 and figure 25)。

The internal diameter of the front 39 of elastic stripping ring 37 is less than the outer diameter of the cone joint 35 of housing 32.When elastic stripping ring 37 Front 39 inside diameter elastomeric deformation after when being inserted on the cone joint 35 of housing 32, elastic stripping ring 37 is constrained on housing 32 Cone joint 35 on, need under the effect of external force elastic stripping ring 37 just can on the cone joint 35 of housing 32 before move back Dynamic (see Figure 16, Figure 18, Figure 19 and Figure 24).

Figure 26 to Figure 35 is the injector for medical purpose 41 for indicating the anti-needle of the utility model 3rd embodiment and stabbing.

As shown in Figure 26 and Figure 32, there are housing 42 and core bar 43 in the injector for medical purpose 41 that anti-needle is stabbed.Before housing 42 There is the cone joint 45 of back cover portion 44 and middle hair style in portion.The back cover portion 44 of housing 42 is in plane.Cone joint 45 is located at back cover portion 44 front end.After core bar 43 is out of the opening of 42 rear end of housing insertion housing 42, the front and back in housing 42 of core bar 43 can be manipulated It is mobile.It is medical that the injector for medical purpose 41 that anti-needle is stabbed can be the metal that the glass injector for medical purpose that anti-needle is stabbed or anti-needle are stabbed Syringe.

Injection needle 46 and elastic stripping ring 47 can be plugged on the cone joint 45 of housing 42.Elastic stripping ring 47 is located at housing (see Figure 26) between 42 back cover portion 44 and injection needle 46.The internal diameter at the middle part 48 of elastic stripping ring 47 had both been greater than the interior of front 49 Diameter, the internal diameter also greater than rear portion 50 (see Figure 34).Elastic stripping ring 47 can be moved forward and backward on the cone joint 45 of housing 42.When When injection needle 46 and elastic stripping ring 47 are inserted on the cone joint 45 of housing 42, injection needle 46 is connected the circular cone of housing 42 On connector 45, elastic stripping ring 47 is located between the back cover portion 44 and injection needle 46 of housing 42 (see Figure 26, Figure 28 and Figure 29).When When the middle part of elastic stripping ring 47 on the cone joint 45 of housing 42 is radially pinched flat, the elastic stripping ring 47 of flexible deformation Rear end is against in the back cover portion 44 of housing 42, and the rear end that the front end of the elastic stripping ring 47 of flexible deformation is against injection needle 46 above pushes away Dynamic injection needle 46 moves forward, so that injection needle 46 is detached from the cone joint 45 of housing 42 (see Figure 27, Figure 30, Figure 31 and figure 35)。

The internal diameter of the front 49 of elastic stripping ring 47 is less than the outer diameter of the cone joint 45 of housing 42.When elastic stripping ring 47 Front 49 inside diameter elastomeric deformation after when being inserted on the cone joint 45 of housing 42, elastic stripping ring 47 is constrained on housing 42 Cone joint 45 on, need under the effect of external force elastic stripping ring 47 just can on the cone joint 45 of housing 42 before move back Dynamic (see Figure 26, Figure 28, Figure 29 and Figure 34).

Figure 36 to Figure 45 is the injector for medical purpose 51 for indicating the anti-needle of the utility model fourth embodiment and stabbing.

As shown in Figure 36 and Figure 42, there are housing 52 and core bar 53 in the injector for medical purpose 51 that anti-needle is stabbed.Before housing 52 There is the cone joint 55 of back cover portion 54 and middle hair style in portion.Cone joint 55 is located at the front end in back cover portion 54.Core bar 53 is from housing 52 After in the opening insertion housing 52 of rear end, core bar 53 can be manipulated and be moved forward and backward in housing 52.The medical injection that anti-needle is stabbed It is medical that device 51 can be the glass that disposable sterilized syringe, the anti-needle that the anti-needle of the elongated low capacity of housing is stabbed are stabbed The metal injector for medical purpose that syringe or anti-needle are stabbed.

Injection needle 56 and elastic stripping ring 57 can be plugged on the cone joint 55 of housing 52.Elastic stripping ring 57 is located at housing (see Figure 36) between 52 back cover portion 54 and injection needle 56.The internal diameter at the middle part 58 of elastic stripping ring 57 had both been greater than the interior of front 59 Diameter, the internal diameter also greater than rear portion 60 (see Figure 44).Elastic stripping ring 57 can be moved forward and backward on the cone joint 55 of housing 52.When When injection needle 56 and elastic stripping ring 57 are inserted on the cone joint 55 of housing 52, injection needle 56 is connected the circular cone of housing 52 On connector 55, elastic stripping ring 57 is located between the back cover portion 54 and injection needle 56 of housing 52 (see Figure 36, Figure 38 and Figure 39).When When the middle part of elastic stripping ring 57 on the cone joint 55 of housing 52 is radially pinched flat, the elastic stripping ring 57 of flexible deformation Rear end is against in the back cover portion 54 of housing 52, and the rear end that the front end of the elastic stripping ring 57 of flexible deformation is against injection needle 56 above pushes away Dynamic injection needle 56 moves forward, so that injection needle 56 is detached from the cone joint 55 of housing 52 (see Figure 37, Figure 40, Figure 41 and figure 45)。

The internal diameter of the front 59 of elastic stripping ring 57 is less than the outer diameter of the cone joint 55 of housing 52.When elastic stripping ring 57 Front 59 inside diameter elastomeric deformation after when being inserted on the cone joint 55 of housing 52, elastic stripping ring 57 is constrained on housing 52 Cone joint 55 on, need under the effect of external force elastic stripping ring 57 just can on the cone joint 55 of housing 52 before move back Dynamic (see Figure 36, Figure 38, Figure 39 and Figure 44).

It is discussed in detail according to above-mentioned it is found that the injector for medical purpose that the anti-needle of the utility model is stabbed can achieve following technology Effect:

The injector for medical purpose that the anti-needle of the utility model is stabbed, the internal diameter using the middle part of elastic stripping ring are both greater than front Internal diameter, also greater than rear portion internal diameter technical characteristic, be located between the back cover portion and injection needle of housing using elastic stripping ring Technical solution form the injector for medical purpose that the anti-needle of the utility model is stabbed, realize when the elasticity on the cone joint of housing is torn open When unloading the middle part of ring and radially being pinched flat, the rear end of the elastic stripping ring of flexible deformation is against in the back cover portion of housing, flexible deformation Elastic stripping ring front end be against on the rear end of injection needle push injection needle move forward so that injection needle be detached from housing circle Taper joint.The technical effect of injection needle will not be touched in operation by reaching the injector for medical purpose that anti-needle is stabbed, thus The injection needle to carry disease germs is avoided to cause harm to the human body.Due to the internal diameter at the middle part of elastic stripping ring be both greater than front internal diameter or It greater than the internal diameter at rear portion, therefore only needs the power of very little that can be compressed in opposite directions the front and rear part of elastic stripping ring, does not influence to inject Needle is inserted in the operation on the cone joint of housing；When the middle part of elastic stripping ring is radially pinched flat, the middle part of elastic stripping ring It is squeezed between its front and rear, so that the axial length elongation of elastic stripping ring, rigidity increase, convenient for pushing injection needle The cone joint of housing is detached from after forward movement.It covers the elastic stripping ring on the cone joint of housing and will not influence anti-needle and stab Injector for medical purpose injection operation, do not increase injection operation step yet.

The injector for medical purpose that the anti-needle of the utility model is stabbed, so that the part for the injector for medical purpose that anti-needle is stabbed is only than normal Advise the more elastic stripping rings covered on the cone joint of housing of part of injector for medical purpose.The cost of elastic stripping ring is lower than The 5% of the cost for the injector for medical purpose that anti-needle is stabbed assembles also very convenient.Elastic stripping ring can be directly conventional various one What secondary property put on that elastic stripping ring constitutes that anti-needle stabs on the cone joint using the housing of asepsis injector disposably makes Use asepsis injector.The disposable sterilized syringe that anti-needle is stabbed, before use, the injection of other specifications can be replaced Needle；After use, the injector for medical purpose of the metal injection needle and plastics that carry disease germs can be classified and is put into collecting box, by plastics material Material and metal material classification recovery processing subsequent are destroyed.Conventional various glass injector for medical purpose and metal medical injection Emitter can carry out conventional cleaning, sterilization treatment using preceding, cover upper elasticity on the cone joint of housing when in use and tear open It unloads ring and constitutes the glass injector for medical purpose that anti-needle is stabbed and the metal injector for medical purpose that anti-needle is stabbed, after use at destruction Manage elastic stripping ring and injection needle.Due to the injector for medical purpose that the anti-needle of the utility model is stabbed can be used directly it is conventional various Conventional housing, core bar in disposable sterilized syringe, various glass injector for medical purpose or various metal injector for medical purpose And injection needle, therefore the technology and equipment of existing processing, assembly and packaging can be directly used, so that product cost is reduced, and And it does not influence conventional injection needle and can be not only used for the various injector for medical purpose with outer cone locked joints, can be used for again without outer The various injector for medical purpose of cone locking joint.

It will thus be seen that above-mentioned stated target, including by those of shown target described above by effectively Reach.Described here is only the typical best form of implementation of the present utility model application, can make certain to above structure A little variations are also without prejudice to the spirit and scope of the utility model.The utility model is not limited to tool set forth herein Body details, and should retain as stated in the restriction of claim for fields secondary technology personnel be it is aobvious and Any improvement being clear to or remodeling.

Claims (6)

1. a kind of injector for medical purpose that anti-needle is stabbed, the injector for medical purpose include housing and core bar；

There are back cover portion and cone joint in the front of the housing, and the cone joint is located at the front end in the back cover portion；

After the core bar is out of the opening of housing rear end insertion housing, core bar can be manipulated and be moved forward and backward in housing；

It is characterized by: injection needle and elastic stripping ring can be plugged on the cone joint of the housing, the elasticity stripping ring position Between the back cover portion of housing and injection needle, the internal diameter at the middle part of elastic stripping ring be both greater than front internal diameter, also greater than The internal diameter at rear portion；

When the middle part of the elastic stripping ring on the cone joint of housing is radially pinched flat, after the elastic stripping ring of flexible deformation End be against in the back cover portion of housing, the front end of the elastic stripping ring of flexible deformation be against on the rear end of injection needle push injection needle to Preceding movement, so that injection needle is detached from the cone joint of housing.

2. the injector for medical purpose that anti-needle according to claim 1 is stabbed, characterized in that the elasticity stripping ring can be described It is moved forward and backward on the cone joint of housing；

When the injection needle and elastic stripping ring are inserted on the cone joint of housing, the circular cone that injection needle is connected housing is connect On head, elastic stripping ring is located between the back cover portion of housing and injection needle；

When the middle part of the elastic stripping ring on the cone joint of housing is radially pinched flat, after the elastic stripping ring of flexible deformation End be against in the back cover portion of housing, the front end of the elastic stripping ring of flexible deformation be against on the rear end of injection needle push injection needle to Preceding movement, so that injection needle is detached from the cone joint of housing.

3. the injector for medical purpose that anti-needle according to claim 2 is stabbed, characterized in that the front of the elasticity stripping ring Internal diameter is less than the outer diameter of the cone joint of the housing；Housing is inserted in after the inside diameter elastomeric deformation of the front of elastic stripping ring When on cone joint, elastic stripping ring is constrained on the cone joint of housing, needs elastic stripping ring under the effect of external force It can be just moved forward and backward on the cone joint of housing.

4. the injector for medical purpose that anti-needle according to claim 1 is stabbed, characterized in that the rear portion of the elasticity stripping ring Internal diameter is greater than the outer diameter of the cone joint of the housing, has circular cone inclined-plane in the back cover portion of housing；

When the middle part of the elastic stripping ring on the cone joint of housing is radially pinched flat, after the elastic stripping ring of flexible deformation The circular cone inclined-plane being against in the back cover portion of housing in back cover portion is held to move, the front end of the elastic stripping ring of flexible deformation is supported Injection needle is pushed to move forward on the rear end of the injection needle, so that injection needle is detached from the cone joint of housing.

5. the injector for medical purpose that anti-needle according to claim 1 is stabbed, characterized in that the rear portion of the elasticity stripping ring is solid Front of the Dingan County mounted in the back cover portion of the housing；

When the injection needle is inserted on the cone joint of housing, injection needle is connected on the cone joint of housing, bullet Property stripping ring is located between the back cover portion and injection needle of housing；

When the middle part of the elastic stripping ring on the cone joint of housing is radially pinched flat, before the elastic stripping ring of flexible deformation End, which is against on the rear end of injection needle, pushes injection needle to move forward, so that injection needle is detached from the cone joint of housing.

6. the injector for medical purpose that anti-needle according to claim 1 is stabbed, characterized in that the front of the elasticity stripping ring is solid Dingan County is mounted in the rear portion of the injection needle；

When the injection needle is inserted on the cone joint of the housing, injection needle is connected on the cone joint of housing, bullet Property stripping ring is located between the back cover portion and injection needle of housing；

When the middle part of the elastic stripping ring at the rear portion for being fixedly mounted on injection needle is radially pinched flat, the elasticity disassembly of flexible deformation The rear end of ring is against in the back cover portion of housing, and the rear end that the front end of the elastic stripping ring of flexible deformation is against injection needle above pushes away Dynamic injection needle moves forward, so that injection needle is detached from the cone joint of housing.