CN101337100A - Disposable syringe - Google Patents
Disposable syringe Download PDFInfo
- Publication number
- CN101337100A CN101337100A CNA2007101279727A CN200710127972A CN101337100A CN 101337100 A CN101337100 A CN 101337100A CN A2007101279727 A CNA2007101279727 A CN A2007101279727A CN 200710127972 A CN200710127972 A CN 200710127972A CN 101337100 A CN101337100 A CN 101337100A
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- Prior art keywords
- syringe
- core bar
- stop part
- piston
- disposable syringe
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a disposable injector which includes a syringe, a core bar and a piston, wherein an integrated injection needle seat is arranged at one end of the syringe; a first blocking part is arranged at one end of the syringe's inner wall, which is connected with one end of the injection needle seat, a second blocking part is arranged at the inner wall of the syringe far away from one end of the injection needle seat, and the space of the first blocking part and the second blocking part along axial direction of the syringe is larger than or equal to the space between a separating piece and a spacing part along the axial direction the core bar; a fracture part is arranged on the piston for connecting with the separating piece and the core bar; and one end of the core bar is connected to the piston to push the piston to move in the syringe. The strippable disposable injector is characterized in that the spacing part is arranged at the other end of the core bar for cooperating with the second blocking part and preventing the separating piece for penetrating through the first blocking part. By adopting the disposable injector, the patient discomfort brought by injection operation is avoided and the accident injury of the injection needle to an operator is prevented.
Description
Technical field
The present invention relates to disposable syringe, relate in particular to a kind of disposable syringe with self-distruction structure.
Background technology
Syringe is mainly used in that human body is subcutaneous, vein and intramuscular injection, also can be used for the vein blood sample collection, has medical application widely.In order to ensure the safety of clinical practice, the disposable syringe of self-distruction structure has appearred in the prior art having, this disposable syringe is after injection finishes, can carry out self-destruction operation by self-distruction structure when reusing this disposable syringe, thereby guarantee that this disposable syringe can not reuse.In addition, occurred in the prior art preventing entry needle from accidentally injuring human body and syringe 40 outside the protection sleeve 90 of setting.
Fig. 1 is a kind of existing primary structure sketch map that comprises the disposable syringe that prevents self-distruction structure.As seen from the figure, this syringe comprises: syringe 40, core bar 50, piston 60.Wherein an end opening of syringe 40 forms opening, and the other end of syringe 40 seals and form integrally formed injecting needle base 30.This injecting needle base 30 can with entry needle 20 fits of the different size of selecting according to use occasion.At the inwall of syringe 40 sealing end near injecting needle base 30, be provided with first stop part 410, be provided with second stop part 420 at the inwall of syringe 40 near opening.One end of core bar 50 is emerging in outside the syringe 40, forms the hand push end, and the other end of core bar 50 is provided with piston 60 and fills in syringe 40, and 60 ones in piston is provided with separation member 80 and fracture portion 70.Described core bar 50 main parts transverse section radially is " ten " font.Be provided with two projectioies 55 and 56 at the relative both wings of this " ten " font near the hand push end.Two projectioies 55 and 56 outer spacing are slightly less than the internal diameter of second stop part, thereby when core bar 50 advances in syringe 40, projection 55 and 56 and second stop part 420 has certain resistance when meeting, but slightly firmly can pass second stop part 420 again and core bar 50 is continued to push.In 60 ones in piston, the external diameter of the separation member 80 of its front end setting is slightly larger than the internal diameter of first stop part 410, and separation member 80 has elastic recovery to core bar 50 hand push extreme directions, but do not have elastic recovery to the injecting needle base direction, thereby when syringe 40 inside advanced, separation member 80 can pass first stop part 410 under less thrust at core bar 50.When core bar 50 was taken out outward, this moment, separation member 80 nonelastic recovery capacity made piston 60 be trapped in the sealing end of syringe 40, and still owing to the external force effect, fracture portion ruptures and piston is separated with core bar, makes the syringe damage.Above syringe damage is needed in the normal running, to avoid the repeated use of syringe.But exist in the syringe use, exist improper operation to cause separation member 80 to pass first stop part 410 and make syringe damage.In syringe 40, be provided with second stop part 420, core bar 50 is provided with projection 55 and 56, because the barrier effect of second stop part 420 and projection 55 and 56 can be avoided causing the syringe damage owing to improper operation makes separation member 80 pass first stop part 410.
Although second stop part 420 can be avoided with projection 55 and 56 causes the situation of syringe damage to take place because improper operation makes separation member 80 pass first stop part 410 by being provided with in the prior art, but, by above technology as seen, projection 55 and 56 will be passed second stop part 420, when giving the human injection, must cause shake to a certain degree, thereby can be subjected to the injector to bring uncomfortable sensation, even may be caused the serious consequence of injection site damage.If above-mentioned adverse consequences has taken place, big medicine amount liquid was not injected yet and was trapped in the syringe this moment, caused the injection failure.
In addition, Fig. 2 A is that a kind of existing protection sleeve that comprises is accidentally injured the primary structure sketch map of the disposable syringe of human body to prevent entry needle.The sectional view that Fig. 2 B cuts open for A-A line among Fig. 2 A.Fig. 2 C is that the described protection sleeve that comprises is accidentally injured the primary structure sketch map of the disposable syringe of human body at the performance functional status to prevent entry needle.By Fig. 2 A and 2B as seen, this syringe is included in the protection sleeve 90 that the periphery of syringe 40 and injecting needle base 30 is provided with.Protection sleeve 90 is tubular on the whole, and is vertically arranged with a plurality of strip projected parts 91A, 91B, 91C and 91D at the internal perisporium upper edge of protection sleeve 90 protection sleeve 90.By adjusting the height of strip projected parts 91A, 91B, 91C and 91D, can make protection sleeve 90 and syringe 40 interval preset distances.Fig. 2 C is after this disposable syringe is finished injection, protection sleeve 90 forwards can be promoted, and makes protection sleeve 90 along vertical reach of syringe 40, thereby entry needle 20 can be surrounded, thereby can prevent that the operator from being accidentally injured by entry needle 20.Although the protection sleeve that is provided with in the prior art 90 can prevent the unexpected human bodies of accidentally injuring of entry needle 20, this protection sleeve 90 still can be easily owing to the external force effect be withdrawn, and then exposes entry needle 20, thereby may cause unexpected accidental injury human body.
Make the syringe damage and second stop part and projection of setting for fear of improper operation in the prior art, introduce new problem thus, i.e. this setting may be subjected to the injector to bring uncomfortable sensation when injection operation, even may cause the serious consequence of injection site damage.Simultaneously in the prior art for prevent the operator by entry needle accidentally injure protection sleeve is set still may be owing to the external force effect is withdrawn, and then expose entry needle, thereby may cause unexpected accidental injury human body.Therefore, solve the aforementioned problems in the prior and be still the target that those skilled in the art seek assiduously.
Summary of the invention
First purpose of the present invention is to solve the structure of avoiding the syringe damage in the prior art can be subjected to the injector to bring uncomfortable sensation when injection operation, even may cause the problem of the serious consequence of injection site damage.Another object of the present invention is that solve in the prior art still may be owing to the external force effect be withdrawn for preventing that entry needle from accidentally injuring protection sleeve that the operator is provided with, and then may cause the problem of unexpected accidental injury human body.
To achieve these goals, the invention provides a kind of disposable syringe with self-distruction structure, it comprises syringe, core bar and piston; Wherein an end of syringe is provided with integrally formed injecting needle base, and the inwall of described syringe is provided with first stop part near an end of injecting needle base, and the inwall of described syringe is provided with second stop part away from an end of injecting needle base; Described piston is provided with separation member and the fracture portion that is connected with described core bar; One end of described core bar is connected with described piston and can promotes piston and moves in syringe, and the other end of described core bar is provided with and can cooperates with described second stop part and prevent that described separation member from passing the tearable limiting section of described first stop part.This realize such scheme easily, first stop part wherein and second stop part along the axial spacing of syringe more than or equal to separation member and limiting section along the axial spacing of core bar, like this, core bar promote piston-advance and separation member near or when being resisted against on first stop part, limiting section is resisted against on second stop part, can stop core bar to continue inwardly to advance, and then stop separation member to pass first stop part.
According to technical conceive of the present invention, the cross section of described core bar main part is " ten " font, described limiting section is arranged on core bar " ten " tearable two lugs on the relative both wings of font.
According to technical conceive of the present invention, above-mentioned core bar " ten " on the relative both wings of font the outside dimensions of tearable two lugs greater than the internal diameter of described second stop part.
According to technical conceive of the present invention, above-mentioned two lugs axially are provided with the portion of can tearing along core bar, the described all right one way or the other internal diameter that tears the spacing of portion less than described second stop part, be that described two lugs can axially tearing along core bar, after described two tearable lugs were torn along the described portion of tearing, the external diameter of " ten " word core bar was less than the internal diameter of described second stop part.Two lugs respectively along the described portion of tearing after core bar axially tears, make core bar can not be subjected to the obstruction of second limiting section when advancing to syringe is inner.Except above-mentioned lug, limiting section of the present invention can also be other shape, and these shapes are that those skilled in the art expect easily according to the present invention.
According to technical conceive of the present invention, the first above-mentioned stop part and second stop part are respectively the annular projection that is arranged at syringe inside.
According to technical conceive of the present invention, above-mentioned fracture portion connects core bar and piston, and core bar with respect to the piston swing after the i.e. parts of fracture.
According to technical conceive of the present invention, the external diameter of above-mentioned separation member is slightly larger than the internal diameter of first stop part, and separation member has elastic recovery to core bar hand push extreme direction, but do not have elastic recovery to the injecting needle base direction, thereby when syringe inside advanced, separation member can pass first stop part under less thrust at core bar.When core bar is taken out outward with above-mentioned thrust, this moment, the nonelastic recovery capacity of separation member and can not pass first stop part made piston be trapped in the injecting needle base end of syringe, but in addition big external force is done the time spent, fracture portion ruptures and piston is separated with core bar, can make the syringe damage.
In order to realize purpose of the present invention; the present invention provides a kind of disposable syringe on the other hand; it is characterized in that; it is on the basis of the above-mentioned design of the present invention; also comprise the protection sleeve that is set in this syringe outside; and the projection that is arranged at least one elastically deformable on the outer wall of described syringe; be formed with the location groove on the barrel of described protection sleeve; this location groove has groove portion and is positioned at first location division and second location division at these groove portion two ends, and the size that this is protruding and this first location division and this second location division match to merge and can pass through this groove portion under the state of stress deformation.Wherein above-mentioned first location division is close to an end that connects entry needle, and above-mentioned second location division is away from an end that connects entry needle.
According to technical conceive of the present invention, aforesaid projection is the hemisphere integrally formed with described syringe.
According to technical conceive of the present invention, aforesaid projection comprises semi-cylindrical first lobe and semi-cylindrical second lobe, this first lobe and this second lobe each interval preset distance.
According to technical conceive of the present invention, groove extending axially in aforesaid location along this protection sleeve.
According to technical conceive of the present invention, aforesaid location groove is around the axis spiral predetermined angular of this protection sleeve.
According to technical conceive of the present invention, aforesaid predetermined angular is can be that 0 degree is to 360 degree.
According to technical conceive of the present invention, aforesaid projection is positioned at the end near the connection entry needle of described syringe.
By above-mentioned design of the present invention, under original state, projection is fixed in first location division.Under thrust; protection sleeve is by axial advancing near an end that connects entry needle to syringe; projection enters because of the strain effect is squeezed in the groove of location; under the guide effect of location groove; protection sleeve continues to push ahead finally to be made projection enter described second location division and fixes, and protection sleeve can surround entry needle and avoid accidentally injuring human body this moment.Comprise semi-cylindrical first lobe and semi-cylindrical second lobe of each interval preset distance in the projection described in the preferred version, described projection is easier to enter in the groove of described location thereby make.Can successfully overcome problems of the prior art thus.
Description of drawings
Fig. 1 is a kind of disposable syringe of the prior art.
Fig. 2 A is an another kind of disposable syringe original state sketch map of the prior art.
Fig. 2 B is the sketch map of Fig. 2 A along the A-A cross section.
Fig. 2 C is the sketch map of the disposable syringe duty of Fig. 2 A.
Fig. 3 is the structural representation of first embodiment of disposable syringe of the present invention.
Fig. 4 is the sketch map of the disposable syringe core bar of Fig. 3.
Fig. 5 is the sketch map of overlooking direction of the syringe core rod of Fig. 4.
Fig. 6 is that the syringe core rod of Fig. 4 is vertically at the sketch map of the cross section of limiting section A-A position.
Fig. 7 is the view after the limiting section of Fig. 6 can tear.
Fig. 8 is the structural representation of second embodiment of disposable syringe of the present invention.
Fig. 9 is the left side view of the disposable syringe of Fig. 8.
Figure 10 is the disposable syringe of Fig. 8 is the protection state at the back entry needle of finishing using a sketch map.
Figure 11 is the sketch map of another kind of embodiment of protection sleeve of the disposable syringe of Fig. 8.
Wherein, description of reference numerals is as follows:
20: entry needle 57,58: limiting section, lug
30: injecting needle base 571,581: can tear portion
40: syringe 60: piston
Stop part 70 in 410: the first: fracture portion
Stop part 80 in 420: the second: separation member
430: projection 90: protection sleeve
50: 922: the first location divisions of core bar
55,56: 923: the second location divisions of projection
91,91A, 91B:91C, 91D: strip projected parts
The specific embodiment
In order to further specify principle of the present invention and structure, now in conjunction with the accompanying drawings the preferred embodiments of the invention are elaborated, yet the described preferred embodiment usefulness for furnishing an explanation and explaining only can not be used for limiting scope of patent protection of the present invention.
Fig. 3 is the structural representation of first embodiment of disposable syringe of the present invention.Fig. 4 is the sketch map of the disposable syringe core bar of Fig. 3.Fig. 5 is the sketch map of overlooking direction of the syringe core rod of Fig. 4.Fig. 6 is that the syringe core rod of Fig. 4 is vertically at the sketch map of the cross section of limiting section A-A position.Fig. 7 is the view after the limiting section of Fig. 6 can tear.
From Fig. 3 as seen, the disposable syringe with self-distruction structure of the present invention, it comprises syringe 40, core bar 50 and piston 60.Wherein an end of syringe 40 is provided with integrally formed injecting needle base 30, and as the accessory of syringe, this syringe can also comprise the entry needle 20 that is linked on the injecting needle base 30.The inwall of described syringe 40 is provided with first stop part 410 near an end of injecting needle base 30, and the inwall of described syringe 40 is provided with second stop part 420 away from an end of injecting needle base 30; Described piston 60 is provided with separation member 80 and the fracture portion 70 that is connected with described core bar 50; One end of described core bar 50 is connected with described piston 60 and can to promote piston mobile syringe 40 in, and the other end of described core bar 50 is provided with and can cooperates with described second stop part and prevent that described separation member 80 from passing the tearable limiting section 57 of described first stop part (with 58).This realize this programme easily, first stop part 410 wherein and second stop part 420 along the axial spacing of syringe 40 more than or equal to separation member 80 and limiting section 57 (with 58) along the axial spacing of core bar, like this, core bar 50 promote that pistons 60 advance and separation member 80 near or when being resisted against on first stop part 410, limiting section 57 (with 58) is resisted against on second stop part 420, can stop core bar 50 to continue inwardly to advance, and then stop separation member 80 to pass first stop part 410.In the present embodiment, above-mentioned first stop part 410 and second stop part 420 optimally select to equal separation member 80 and limiting section 57 (with 58) along the axial spacing of core bar along syringe 40 axial spacings.
See also Fig. 3～Fig. 7.In order to realize the present embodiment with optimum efficiency, the cross section of described core bar main part is " ten " font, described limiting section 57 (with 58) is arranged on core bar " ten " tearable two lugs 57 (with 58) on the relative both wings of font.The outside dimensions of described two lugs 57 (with 58) is greater than the internal diameter of described second stop part 420.Above-mentioned two lugs 57 (with 58) are along the portion of can tearing 571 that axially is provided with (with 581) (as Fig. 6) of core bar 50, the described all right one way or the other internal diameter that tears the spacing of portion 571 (with 581) less than described second stop part 420, be that described two lugs 57 (with 58) can be along axially the tearing of core bar (as Fig. 7), by after being torn, the external diameter of " ten " word core bar is less than the internal diameter of described second stop part along the described portion 571 (with 581) of tearing for described two tearable lugs 57 (with 58).Thereby make core bar 50 when syringe 40 inner propellings, can not be subjected to the obstruction of second limiting section 420.Above-mentioned first stop part 410 and second stop part 420 are respectively the annular projection that is arranged at syringe 40 inside.First stop part 410 that is provided with in the mode of annular projection and the benefit of second stop part 420 are, anyway core bar 40 rotates in syringe 40, and described first stop part 410 and second stop part 420 all can block the limiting section 57,58 of separation member 80 and lug form respectively.The external diameter of described separation member 80 is slightly larger than the internal diameter of first stop part 410, and separation member 80 has elastic recovery to core bar 50 hand push extreme directions, but do not have elastic recovery to the injecting needle base direction, thereby when syringe 40 inside advanced, separation member 80 can pass first stop part 410 under less thrust at core bar 50.When core bar 50 is taken out outward with above-mentioned less thrust, this moment, separation member 80 nonelastic recovery capacity and can not pass first stop part made piston 60 be trapped in the injecting needle base end of syringe 40, but in addition big external force is done the time spent, fracture portion ruptures and piston is separated with core bar, can make the syringe damage.The embodiment of the present embodiment alternative is, fracture portion 70 connects core bar 40 and piston 60, and core bar 40 with respect to piston 60 Rotate 180 degree after the i.e. parts (not shown) of fracture.
Fig. 8 is the structural representation of second embodiment of disposable syringe of the present invention.Fig. 9 is the left side view of the disposable syringe of Fig. 8.Figure 10 is the disposable syringe of Fig. 8 is the protection state at the back entry needle of finishing using a sketch map.Figure 11 is the sketch map of another kind of embodiment of protection sleeve of the disposable syringe of Fig. 8.In this second embodiment, except the architectural feature that comprises aforementioned first embodiment, also comprise the protection sleeve that prevents entry needle accidental injury human body.See also Fig. 8 earlier, it is the disposable syringe of second kind of embodiment of the present invention, and it comprises syringe 40, core bar 50, piston 60 (not indicating among the figure) and the protection sleeve 90 that is set in these syringe 40 outsides; The outer wall of described syringe 40 is provided with the projection 430 of at least one elastically deformable; be formed with location groove 92 on the barrel of described protection sleeve 90; this location groove 92 has groove portion 921 and is positioned at first location division 922 and second location division 923 at these groove portion 921 two ends, and the size of this projection 430 matches with this first location division 922 and this second location division 923 and merges under the state that can dwindle at stress deformation by this groove portion 921.Wherein above-mentioned first location division 922 is close to an end that connects entry needle, and above-mentioned second location division 923 is away from an end that connects entry needle.In a preferred embodiment, described protruding 430 is the hemisphere integrally formed with described syringe 40.In a preferred embodiment; described protruding 430 comprise semi-cylindrical first lobe 4301 and semi-cylindrical second lobe 4302; these first lobe 4301 and these second lobe, 4302 each interval preset distances; at this moment; because it is gapped between first lobe 4301 and second lobe 4302; in the less groove portion 921 of size, be squeezed easily and dwindle; thereby make protection sleeve 90 under the positioning action of projection 430; advance and enter second location division 923 from first location division 922 along groove portion 921 to the entry needle direction, and then entry needle is wrapped up (as Figure 10).Because the positioning action of second location division 923, if there is not special external force effect, protection sleeve 90 is difficult to return, thereby can not expose entry needle again, and the disposable syringe of avoiding finishing using is accidentally injured human body again.As Fig. 8 and shown in Figure 10, the location groove 92 described in this preferred embodiment is along the axial straight-line extension of this protection sleeve 90.Shown in Figure 10, the groove 92 of location described in this preferred embodiment is around the axis spiral predetermined angular of this protection sleeve 90.Above-mentioned projection 430 is positioned at the end near the connection entry needle of described syringe 40.
Claims (10)
1, a kind of disposable syringe comprises syringe, core bar and piston; One end of wherein said syringe is provided with integrally formed injecting needle base, the end that the inwall of described syringe connects described injecting needle base is provided with first stop part, the inwall of described syringe is provided with second stop part away from an end of injecting needle base, described first stop part and second stop part along the axial spacing of syringe more than or equal to separation member and limiting section along the axial spacing of core bar; Described piston is provided with separation member and the fracture portion that is connected with described core bar; One end of described core bar is connected with described piston and can promotes described piston and moves in syringe; It is characterized in that the other end of described core bar is provided with and can cooperates with described second stop part and prevent that described separation member from passing the tearable limiting section of described first stop part.
2, disposable syringe as claimed in claim 1 is characterized in that, the cross section of described core bar main part is " ten " font, described limiting section is arranged on core bar " ten " tearable two lugs on the relative both wings of font.
3, disposable syringe as claimed in claim 2 is characterized in that, described core bar " ten " on the relative both wings of font the outside dimensions of tearable two lugs greater than the internal diameter of described second stop part.
4, disposable syringe as claimed in claim 3 is characterized in that, described two lugs can be along axially the tearing of core bar, and after described two tearable lugs were torn, the external diameter of " ten " word core bar was less than the internal diameter of described second stop part.
5, disposable syringe as claimed in claim 1 is characterized in that, described first stop part and second stop part are respectively the annular projection that is arranged at syringe inside.
6, disposable syringe as claimed in claim 1 is characterized in that, described fracture portion connects core bar and piston, and core bar with respect to piston Rotate 180 degree after the i.e. parts of fracture.
7, as any described disposable syringe of claim 1～6; it is characterized in that; also comprise the protection sleeve that is set in this syringe outside; and the projection that is arranged at least one elastically deformable on the outer wall of described syringe; be formed with the location groove on the barrel of described protection sleeve; this location groove has groove portion and is positioned at first location division and second location division at these groove portion two ends, and the size that this is protruding and this first location division and this second location division match to merge and can pass through this groove portion under the state of stress deformation.
8, disposable syringe as claimed in claim 7 is characterized in that, described first location division is close to an end that connects entry needle, and above-mentioned second location division is away from an end that connects entry needle.
9, disposable syringe as claimed in claim 7 is characterized in that, described projection comprises semi-cylindrical first lobe and semi-cylindrical second lobe, this first lobe and this second lobe each interval preset distance.
10, disposable syringe as claimed in claim 7 is characterized in that, described location groove is the axis spiral predetermined angular that extends axially or center on this protection sleeve along this protection sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101279727A CN101337100A (en) | 2007-07-06 | 2007-07-06 | Disposable syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101279727A CN101337100A (en) | 2007-07-06 | 2007-07-06 | Disposable syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101337100A true CN101337100A (en) | 2009-01-07 |
Family
ID=40211363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101279727A Pending CN101337100A (en) | 2007-07-06 | 2007-07-06 | Disposable syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101337100A (en) |
-
2007
- 2007-07-06 CN CNA2007101279727A patent/CN101337100A/en active Pending
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| C06 | Publication | ||
| PB01 | Publication | ||
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Open date: 20090107 |