CN1961982A - Disposable syringe - Google Patents
Disposable syringe Download PDFInfo
- Publication number
- CN1961982A CN1961982A CN 200610161993 CN200610161993A CN1961982A CN 1961982 A CN1961982 A CN 1961982A CN 200610161993 CN200610161993 CN 200610161993 CN 200610161993 A CN200610161993 A CN 200610161993A CN 1961982 A CN1961982 A CN 1961982A
- Authority
- CN
- China
- Prior art keywords
- piston
- conjunction
- disposable syringe
- core bar
- stop part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims description 35
- 238000000502 dialysis Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 14
- 230000004308 accommodation Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 4
- 210000004209 hair Anatomy 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 239000012567 medical material Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000010255 intramuscular injection Methods 0.000 description 1
- 239000007927 intramuscular injection Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a one-time injector, which comprises injection needle; cylinder needle base used to hold said needle; position formed by front combiner and back combiner, wherein the front end of front combiner has first separator; the back end of back combiner has first break line; spindle rod via the first break rod is connected to the back combiner; the inner wall of muffle has first block part; the first block part is near the injection needle base, and matched with first separator to break the first break line, when the injection is completed and the spindle rod is drawn back. Since the piston and spindle rod can be combined, the piston and the spindle rod are not integrated, to save cost.
Description
Technical field
The present invention relates to a kind of disposable syringe, relate in particular to a kind of disposable syringe with self-distruction structure.
Background technology
Disposable 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.Traditional disposable syringe mainly is made up of sleeve pipe, core bar, piston and entry needle.Damage by the problem of injector's health in order to solve because disposable syringe is repeated to use, 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.
Figure 1A is a kind of primary structure sketch map of existing disposable syringe, and Figure 1B is the operation principle sketch map of described existing disposable syringe.
Shown in Figure 1A, described existing disposable syringe comprises: entry needle 2, and its periphery can be provided with protective sleeve of syringe needle 1; Injecting needle base 3; Sleeve pipe 4, the inwall of described sleeve pipe 4 is provided with stop part 41; And (that is, from the below of Figure 1A upward) integrally formed core bar 5, geosutures 7, piston 6 and separation member 8 according to the order of sequence, be arranged with rubber ring 66 in the periphery of piston 6.
Shown in Figure 1B, the operation principle of described disposable syringe is as follows: after described disposable syringe injection is finished, the position of separation member 8 is arranged in the place ahead (promptly being positioned at the position of Figure 1B top) of stop part 41, when core bar 5 under external force moves (promptly move the below in Figure 1B) backward and drive piston 6 when mobile backward together, stop part 41 will stop separation member 8, and geosutures 7 will rupture under the continuation effect of described external force.After geosutures 7 fractures, core bar 5 just separates disengagement and can not drive piston 6 again with described piston 6, thereby causes the self-destruction of described disposable syringe.Simultaneously, the separation member of staying in the sleeve pipe 48 can be blocked in the sleeve pipe 4, thereby further prevents reusing of described disposable syringe.
Yet, the problem that exists in the above-mentioned disposable syringe is: because in above-mentioned disposable syringe, piston 6, separation member 8, geosutures 7 and core bar 5 are integrally formed and make by medical material, and rubber ring 66 need be set on the piston 6, therefore cause above-mentioned disposable syringe manufacturing cost height, production efficiency is low.
Summary of the invention
The purpose of this invention is to provide a kind of disposable syringe, it had both had the self-distruction structure that can prevent that disposable syringe is used again, and manufacturing is easier, the production efficiency height.
For achieving the above object, the invention provides a kind of disposable syringe, comprising: entry needle; The tubular injecting needle base is used to keep described entry needle; Piston, described piston by piston before behind conjunction and the described piston conjunction be assembled, the front end of conjunction is formed with first separation member before the described piston, the rear end of conjunction is formed with first geosutures behind the described piston; Core bar, described core bar by first geosutures and described piston after conjunction link together; And sleeve pipe, described telescopic inwall is provided with first stop part, described first stop part is set near described injecting needle base, and described first stop part cooperates with described first separation member and makes the described first dialysis thread breakage when pulling back described core bar after described disposable syringe injection finishes.
According to technical conceive of the present invention, the front end of conjunction also is formed with second geosutures before the described piston, and described first separation member is connected in conjunction before the described piston by described second geosutures.
According to technical conceive of the present invention, the rear end of described back conjunction also is formed with second separation member.
According to technical conceive of the present invention, described first separation member and described second separation member are elasticity concave face plate, elastic ring or cross elasticity rib.
According to technical conceive of the present invention, also be provided with second stop part on the described telescopic inwall, and described core bar is provided with projection, described second stop part can cooperate to prevent described disposable syringe inadvertent destruct with described projection.
According to technical conceive of the present invention, described first stop part and described second stop part are bulge loop or a plurality of projectioies for radially being provided with along described sleeve pipe.
According to technical conceive of the present invention, conjunction, described second separation member and described core bar are integrally formed behind the described piston.
According to technical conceive of the present invention, the front end of described core bar also is equipped with the core bar joint portion, and conjunction is integrally formed behind described core bar joint portion and described first geosutures and the described piston.
According to technical conceive of the present invention, conjunction is the tenon spare with tenon before the described piston, and conjunction has and the corresponding tongue-and-groove of described tenon behind the described piston.
According to technical conceive of the present invention; described disposable syringe also comprises protection sleeve; described protection sleeve is set in the periphery of described sleeve pipe and described injecting needle base with predetermined space; after described disposable syringe injection was finished, described protection sleeve can be along described telescopic vertical reach to be enclosed in described entry needle in the described protection sleeve.
Compared with prior art, preferential and beneficial effect of the present invention is, owing to can piston and core bar be assembled together by the mode of assembling, need not integrally formed piston and core bar, and it is the operating procedure that rubber ring set is located on the piston is easier, therefore disposable syringe manufacturing of the present invention is easier, and has reduced the integral production cost, has improved production efficiency.
Description of drawings
Figure 1A is a kind of primary structure sketch map of existing disposable syringe.
Figure 1B is the operation principle sketch map of described existing disposable syringe.
Fig. 2 A is the primary structure sketch map according to the disposable syringe of first embodiment of the invention.
Fig. 2 B is the amplification decomposing schematic representation of piston first example in the first embodiment of the invention.
Fig. 2 C is the amplification decomposing schematic representation of piston second example in the first embodiment of the invention.
Fig. 3 A is the primary structure sketch map according to the disposable syringe of second embodiment of the invention.
Fig. 3 B is the sketch map of core bar in the second embodiment of the invention.
Fig. 4 is the primary structure sketch map according to the disposable syringe of third embodiment of the invention.
Fig. 5 A is the primary structure sketch map according to the disposable syringe of fourth embodiment of the invention.
The sectional view of Fig. 5 B for cutting open along A-A line among Fig. 5 A.
Fig. 5 C is the operation principle sketch map according to fourth embodiment of the invention.
The specific embodiment
In order to further specify principle of the present invention and structure, existing in conjunction with the accompanying drawings to a preferred embodiment of the present invention will be described in detail, however 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. 2 A is the primary structure sketch map according to the disposable syringe of first embodiment of the invention.Fig. 2 B is the amplification decomposing schematic representation of piston in the first embodiment of the invention.Fig. 2 C is the amplification decomposing schematic representation of piston second example in the first embodiment of the invention.
Shown in Fig. 2 A, comprise members such as entry needle 20, injecting needle base 30, sleeve pipe 40, core bar 50 and piston 60 according to the disposable syringe of first embodiment of the invention.
Periphery at entry needle 20 can be provided with protective sleeve of syringe needle 10, and protective sleeve of syringe needle 10 is used to protect syringe needle not to be subjected to external pollution.
Injecting needle base 30 is a tubular structure, and can be with sleeve pipe 40 by integrally formed such as medical materials such as resins.The front end of described injecting needle base 30 is used to keep entry needle 20, and the other end is connected with described sleeve pipe 40.
Be formed with first stop part 410 on the internal perisporium of sleeve pipe 40.First stop part 410 is arranged on the position near injecting needle base 30.First stop part 410 can be single bulge loop, perhaps is along radially equally distributed a plurality of projectioies of the interior week of described sleeve pipe 40.
Piston 60 by conjunction before the piston 61 and piston after conjunction 62 be assembled, can also be arranged with rubber ring 660 on the periphery of conjunction 62 behind conjunction 61 and the piston before piston, the inner wall surface that the periphery of rubber ring 660 is close to sleeve pipe 40 sucks the suction that liquid medicine is waited for injected material producing.
Assembly mode behind preceding conjunction 61 of piston and the piston between the conjunction 62 is unrestricted, for example conjunction before the piston 61 can be set to have the tenon spare of tenon, and conjunction behind the piston 62 is set to have the tongue-and-groove that matches with described tenon, so that the tenon of conjunction 61 can be assemblied in the tongue-and-groove of conjunction 62 behind the piston before the piston, thereby conjunction 62 behind conjunction 61 and the piston before the described piston is assembled into piston 60.Perhaps, conjunction 61 can be a cylinder (figure does not show) before the piston, and conjunction 62 has ccontaining described cylindrical accommodation space (figure does not show) behind the piston, thereby conjunction 62 behind conjunction before the piston 61 and the piston can be assembled into piston 60.
Show a kind of assembly structure of piston 60 of the present invention as Fig. 2 B.In order to strengthen before the piston bond strength between the conjunction 62 behind the conjunction 61 and piston, can before piston, a plurality of palpus hairs 611 that tilt at a predetermined angle be set the tenon of conjunction 61 on every side, and conjunction 62 is provided with another palpus hair 612 that tilts at a predetermined angle behind piston, after conjunction 62 is assembled together behind conjunction 61 and the piston before piston, must hair 611 can and must hair 612 interact to strengthen before the pistons bond strength between the conjunction 62 behind the conjunctions 61 and piston.
Fig. 2 C shows another assembly structure of piston 60 of the present invention.In this structure, piston 60 by conjunction before the piston 63 and piston after conjunction 64 be assembled, and can be before piston behind conjunction 63 and the piston periphery of conjunction 64 assemblings rubber ring (figure does not show) is set, conjunction 63 has two junction surface 63A, 63B that separate before the piston, conjunction 64 inside have the accommodation space 640 that is used for ccontaining junction surface 63A, 63B behind the piston, and accommodation space 640 tops have the opening that inserts for junction surface 63A, 63B.The outer rim of junction surface 63A, 63B has a plurality of projectioies that are arranged above and below (figure do not show), and after junction surface 63A, 63B inserted accommodation space 640, junction surface 63A, 63B will be held in behind the piston in the conjunction 64.Simultaneously, the magnitude of inclination of conjunction 64 is excessive behind the piston when preventing before the assembling piston conjunction 64 behind conjunction 63 and the piston, and two symmetric T shape projectioies 53,54 can also be set on the top of core bar 50.
The front end of conjunction 61 is formed with first separation member 80 before the piston.First separation member 80 can be the elasticity concave face plate with certain intensity, elastic ring or the cross elasticity rib of being made by medical material, so that first separation member 80 can be stopped by described first stop part 410.
At integrally formed first geosutures 70 between the conjunction 62 behind core bar 50 and the piston.First geosutures 70 have suitable mechanical strength, so that stop under the situation of first separation member 80 at first stop part 410,50 first geosutures 70 will rupture if the operator continues to pull back core bar.
Operation principle according to the disposable syringe of first embodiment of the invention is as follows: when the operator promotes core bar 50 forward in order to suck liquid medicine and to wait for injected material, do not make first separation member 80 through first stop part 410, then, pulling back core bar 50 is inhaled in the sleeve pipe 40 thing to be injected, because this moment, first stop part 410 did not stop first separation member 80,70 of first geosutures are subjected to operator's pulling force and the frictional force between piston 60 and sleeve pipe 40 inwalls, and are stressed less thereby can not rupture.After injection finishes, at this moment owing to will push described thing to be injected as much as possible, thus under the pushing and withstanding of piston 60, first separation member 80 can strain through first stop part 410, thereby be positioned at the place ahead of first stop part 410.When the operator pulls back core bar 50, piston 60 can move backward, at this moment described first separation member 80 can be stopped by first stop part 410, thereby make first geosutures 70 be subjected to forward barrier force, frictional force forward and pulling force backward, stressed increase greatly, therefore first geosutures 70 will rupture.After 70 fractures of first geosutures, core bar 50 breaks away from piston 60 and separates, thereby can avoid reusing of disposable syringe.
To sum up, because in disposable syringe of the present invention, piston 60 by conjunction before the piston 61 and piston after conjunction 62 be assembled, so need not to make first separation member 80, piston 60, first geosutures 70 and core bar 50 integrally formed, thereby make easier, reduce the integral production cost, improved production efficiency.
Fig. 3 A is the primary structure sketch map according to the disposable syringe of second embodiment of the invention.Fig. 3 B is the sketch map of core bar in the second embodiment of the invention.
Shown in Fig. 3 A and Fig. 3 B, the second embodiment of the present invention is compared main distinction part with described first embodiment and is, the front end of core bar 50 is equipped with core bar joint portion 51, also is provided with second stop part 420 on the inwall of sleeve 40, and core bar 50 is provided with projection 55,56.
The core bar joint portion 51 and first geosutures 70 are integrally formed, and in other words, conjunction 62 is made of one piece behind core bar joint portion 51, first geosutures 70 and the piston.
Front end at core bar 50 also has holding part 52, and described core bar joint portion 51 is assemblied in the holding part 52.Although shown in Fig. 3 A and Fig. 3 B is that core bar joint portion 51 is the tenon spare with tenon, the present invention is not as limit, and for example core bar joint portion 51 can be cylinder.
When the disposable syringe of producing according to second embodiment of the invention, conjunction 62, first geosutures 70, core bar joint portion 51 behind conjunction 61 before the first integrally formed separated part 80 and the piston, the integrally formed piston can be assembled together with core bar 50, thereby make that manufacturing is more easy, further reduced the integral production cost and improved production efficiency.
Fig. 4 is the primary structure sketch map according to the disposable syringe of third embodiment of the invention.
As shown in Figure 4, the third embodiment of the present invention is compared main distinction part with described second embodiment and is, first geosutures 70 are provided with second separation member 81, and are formed with second geosutures 71 between the conjunction 61 before first separation member 80 and piston.
According to described the 3rd embodiment, when after disposable syringe is finished injection, pulling back core bar 50, if failing to block first separation member 80, first stop part 410 cause piston 60 to continue to be driven mobile backward by core bar 50, then second stop part 420 can stop second separation member 81 once more, so that first geosutures 70 can effectively rupture.
Simultaneously, because the front end of conjunction 61 is formed with second geosutures 71 before piston, when therefore after injection finishes, pulling back core bar 50, second geosutures 71 also can rupture, play the effect of stopping up sleeve 40 in the sleeve 40 thereby stay, with the self-destruction performance of further raising disposable syringe.
The shape of second separation member 81 can be identical with first separation member 80 with structure.The shape of second stop part 420 can be identical with described first stop part 410 with structure.
Fig. 5 A is the primary structure sketch map according to the disposable syringe of fourth embodiment of the invention.The sectional view of Fig. 5 B for cutting open along A-A line among Fig. 5 A.Fig. 5 C is the operation principle sketch map according to fourth embodiment of the invention.
Shown in Fig. 5 A, Fig. 5 B and Fig. 5 C, the difference of the fourth embodiment of the invention and first embodiment is, is provided with protection sleeve 90 in the periphery with injecting needle base 30 of sleeve pipe 40.
After finishing injection according to the disposable syringe of fourth embodiment of the invention; protection sleeve 90 forwards can be promoted; make protection sleeve 90 along vertical reach of sleeve pipe 4, thereby entry needle 30 can be surrounded, thereby can prevent that the operator from being accidentally injured by entry needle 30.
To sum up, the invention provides a kind of disposable syringe, it had both had the self-distruction structure that prevents that disposable syringe is used again, and manufacturing is easier, the production efficiency height.
Claims (10)
1. disposable syringe comprises:
Entry needle;
The tubular injecting needle base is used to keep described entry needle;
Piston, described piston by piston before behind conjunction and the described piston conjunction be assembled, the front end of conjunction is formed with first separation member before the described piston, the rear end of conjunction is formed with first geosutures behind the described piston;
Core bar, described core bar by first geosutures and described piston after conjunction link together; And
Sleeve pipe, described telescopic inwall is provided with first stop part, described first stop part is set near described injecting needle base, and described first stop part cooperates with described first separation member and makes the described first dialysis thread breakage when pulling back described core bar after described disposable syringe injection finishes.
2. disposable syringe as claimed in claim 1, the front end of conjunction also is formed with second geosutures before the wherein said piston, and described first separation member is connected in conjunction before the described piston by described second geosutures.
3. disposable syringe as claimed in claim 1, the rear end of wherein said back conjunction also is formed with second separation member.
4. disposable syringe as claimed in claim 1, wherein said first separation member and described second separation member are elasticity concave face plate, elastic ring or cross elasticity rib.
5. disposable syringe as claimed in claim 1 also is provided with second stop part on the wherein said telescopic inwall, and described core bar is provided with projection, and described second stop part can cooperate to prevent described disposable syringe inadvertent destruct with described projection.
6. disposable syringe as claimed in claim 5, wherein said first stop part and described second stop part are bulge loop or a plurality of projectioies for radially being provided with along described sleeve pipe.
7. disposable syringe as claimed in claim 1, conjunction, described second separation member and described core bar are integrally formed behind the wherein said piston.
8. the described disposable syringe of claim 1, the front end of wherein said core bar also is equipped with the core bar joint portion, and conjunction is integrally formed behind described core bar joint portion and described first geosutures and the described piston.
9. conjunction is the tenon spare with tenon before the disposable syringe as claimed in claim 1, wherein said piston, and conjunction has and the corresponding tongue-and-groove of described tenon behind the described piston.
10. as described any disposable syringe of claim 1-9; wherein said disposable syringe also comprises protection sleeve; described protection sleeve is set in the periphery of described sleeve pipe and described injecting needle base with predetermined space; after described disposable syringe injection was finished, described protection sleeve can be along described telescopic vertical reach to be enclosed in described entry needle in the described protection sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610161993 CN1961982A (en) | 2006-12-12 | 2006-12-12 | Disposable syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610161993 CN1961982A (en) | 2006-12-12 | 2006-12-12 | Disposable syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1961982A true CN1961982A (en) | 2007-05-16 |
Family
ID=38081318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610161993 Pending CN1961982A (en) | 2006-12-12 | 2006-12-12 | Disposable syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1961982A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013181919A1 (en) * | 2012-06-06 | 2013-12-12 | Shanghai Sol-Millennium Medical Products Co., Ltd. | Disposable syringe and push rod for the same |
| US10537687B2 (en) | 2011-09-01 | 2020-01-21 | Sol-Millennium Medical Hk Limited | Needle protection device and safety needle assembly |
-
2006
- 2006-12-12 CN CN 200610161993 patent/CN1961982A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10537687B2 (en) | 2011-09-01 | 2020-01-21 | Sol-Millennium Medical Hk Limited | Needle protection device and safety needle assembly |
| WO2013181919A1 (en) * | 2012-06-06 | 2013-12-12 | Shanghai Sol-Millennium Medical Products Co., Ltd. | Disposable syringe and push rod for the same |
| CN103463713A (en) * | 2012-06-06 | 2013-12-25 | 上海萌黎国际贸易有限公司 | Disposable syringe and push rod for disposable syringe |
| US9669166B2 (en) | 2012-06-06 | 2017-06-06 | Sol-Millennium Medical Hk Limited | Disposable syringe and push rod for the same |
| CN103463713B (en) * | 2012-06-06 | 2019-09-13 | 千禧光医疗科技(上海)有限公司 | Disposable syringe and push rod for disposable syringe |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |