CN100415313C - Safety injection cylinder - Google Patents
Safety injection cylinder Download PDFInfo
- Publication number
- CN100415313C CN100415313C CNB2004100798747A CN200410079874A CN100415313C CN 100415313 C CN100415313 C CN 100415313C CN B2004100798747 A CNB2004100798747 A CN B2004100798747A CN 200410079874 A CN200410079874 A CN 200410079874A CN 100415313 C CN100415313 C CN 100415313C
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- CN
- China
- Prior art keywords
- sour jujube
- safety injection
- injection tube
- pin head
- jujube portion
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Abstract
The present invention relates to a safety injection cylinder, wherein the needle head group has a needle body and a needle head seat; the needle body is arranged on the needle head seat which has a first through hole. The needle head group seat, which is connected with one end of the cylinder body, has a second through hole; the needle group is positioned at the second through hole, and the first through hole is communicated with the second through hole. A clamping and resisting piece has a first ratchet part and at least a second ratchet part, and the clamping and resisting piece combines with the needle head group. One end of a push rod is provided with a piston, and the piston end of the push rod has a convex part. When the push rod is pushed along the first direction to the needle head group seat, the first ratchet part and the second ratchet part respectively resist the convex part. The invention can pull back the needle head group into the cylinder body and make the needle group arranged in an inclined way in order to avoid the reuse of the safety injection cylinder.
Description
Technical field
The present invention is about a kind of syringe cylinder, particularly has a retainer component about a kind of, the syringe needle group can be bounced back to the high-safety injection tube in the syringe.
Background technology
Acupuncture accident is with to be engaged in the safety of medical worker closely bound up, from sufferer, doctor, nurse, nurse healthcare workers, can all belong to the potential danger group with the syringe contactee in all working environments.There is nearly about 20 kinds menses communicate illness to dispose syringe improperly and causes disease infection by contact.Wherein, comprise hepatitis B, AIDS, C type hepatitis, diphtheria, gonorrhea, macule, typhoid fever, rash, malaria, syphilis, tuberculosis etc. through blood borne diseases.
Use the danger that is brought in order to reduce syringe, many medical institutions just actively research and develop high-safety injection tube, and the United States Federal and state government also actively pass through bill, the syringe safety problem in the attention work of standardize medical unit.Americanologist had been crossed the high-safety injection tube bill in 2000, and device safe in utilization is answered by explicit stipulation medical institutions, took place unexpectedly to reduce sufferer and medical and nursing work person pricking wound in using the syringe process.Therefore, how producing high-safety injection tube safer, that more allow the people conveniently use, is the target that whole industry circle is made joint efforts.
Known high-safety injection tube 10, as shown in Figure 1, it comprises a syringe needle group 11, a cylindrical shell 12 and a push rod 13.Wherein, syringe needle group 11 comprises a needle holder 111 and a needle body 112 again.Be provided with one first convergence part 113 in needle holder 111.Push rod 13 then be provided with one can with 113 bonded second convergence parts 131, first convergence part.As shown in Figure 2, when injection finishes, be installed on push rods 13 in the cylindrical shell 12 and can be pushed to an end of cylindrical shell 12, first convergence part 113 is combined with second convergence part 131, thereby the syringe needle group 11 of utilizing push rod 13 will be incorporated into cylindrical shell 12 inwalls upper ends draws in the inside of cylindrical shell 12, can stab medical personnel with the needle body 112 after avoiding using.
Known high-safety injection tube 10 utilizes combining of first convergence part 113 and second convergence part 131, to reach the purpose of needle body 112 retractions.Usually, first convergence part 113 is a flange, is located on the inwall of needle holder 111, lives second convergence part 131 with engaging.When making first convergence part 113 or second convergence part 131, utilize the processing procedure of ejection formation mostly, and have a plurality of die cavitys in each mould, to improve the quantity that ejection formation is produced.Yet a little error during owing to each die cavity die sinking often makes the precision of each finished product be difficult for improving, and easily causes the engaging yield of high-safety injection tube 10 not good.
In addition, first convergence part 113 combines with second convergence part 131, needle body 112 can only be bounced back in the cylindrical shell 12, if needle body 112 is released outside the cylindrical shell 12 once more, and the use that the needle body 112 that can will pollute carries out next time.Therefore, and can't avoid used needle body 112 to be repeated to utilize, this is for sufferer and medical personnel, and being as good as is a kind of great threat.
Because the problems referred to above, this case is invented because of in this, urgently thinks a kind of high-safety injection tube that the engaging yield is not good, needle body easily is repeated problems such as using that can solve the known safe syringe cylinder.
Summary of the invention
Because above-mentioned problem, purpose of the present invention can retract the syringe needle group in the cylindrical shell for providing a kind of, and makes that the syringe needle group is askew puts, and avoids reusable high-safety injection tube.
For reaching above-mentioned purpose,, comprise a cylindrical shell, a syringe needle group, a pin head set base, a retainer component and a push rod according to high-safety injection tube of the present invention.Wherein, the syringe needle group has a needle body and a needle holder, and needle body is arranged at needle holder, and needle holder has one first through hole.One end of pin head set base and cylindrical shell links, and the pin head set base has one second through hole, and the syringe needle group is positioned at second through hole, and first through hole communicates with second through hole.Retainer component has one first sour jujube portion, and at least one second sour jujube portion that is oppositely arranged with the first sour jujube portion, and retainer component combines with the pin head set base.Push rod one end is provided with a piston, and the piston end of push rod has a protuberance, and when push rod was pushed into the pin head set base toward a first direction, the first sour jujube portion and the second sour jujube portion propped up protuberance respectively.
From the above, because of according to high-safety injection tube of the present invention, have the retainer component that is incorporated into the pin head set base, and retainer component have the first sour jujube portion and the second sour jujube portion.When injection finished, the piston of push rod front end was pushed into the pin head set base, made win sour jujube portion and the second sour jujube portion prop up protuberance.When retracting push rod, the first sour jujube portion of retainer component can push protuberance toward the second sour jujube portion backward, and the second sour jujube portion that makes embeds protuberance, and then makes whole syringe needle group and pin head set base be pulled in the cylindrical shell, exposes and causes acupuncture accident with the needle body of avoiding having polluted.Compared to the prior art, high-safety injection tube of the present invention does not need the inwall of pin head set base to form with ejection formation and has corresponding holding section, finishes the moving part that engages with the protuberance of push rod front end but utilize with the bonded retainer component of pin head set base.Moreover the first sour jujube portion pushes protuberance toward the second sour jujube portion, and the second sour jujube portion embeds protuberance, so when retracting syringe needle group and pin head set base, with the askew push rod front end that places of the bonded pin head set base of retainer component, therefore can avoid repeated use.In addition, retainer component utilizes impact style one-body molded, has promoted the production precision of retainer component greatly, so also increased the yield of product.
Description of drawings
Fig. 1 is a sketch map of known safe syringe cylinder;
Fig. 2 is a generalized section of known safe syringe cylinder;
Fig. 3 is a generalized section of the high-safety injection tube of preferred embodiment of the present invention;
Fig. 4 combines sketch map for the pin head set base of the high-safety injection tube of preferred embodiment of the present invention with one of retainer component, wherein the junction surface of retainer component is a crooked sidewall;
Fig. 5 combines sketch map for another of the pin head set base of the high-safety injection tube of preferred embodiment of the present invention and retainer component, and wherein the junction surface of retainer component is a hook part;
Fig. 6 is the pin head set base of the high-safety injection tube of preferred embodiment of the present invention and the another sketch map that combines of retainer component, and wherein the pin head set base has the bottom surface of an indent, and retainer component has two second sour jujube portions;
Fig. 7 is the pin head set base of the high-safety injection tube of preferred embodiment of the present invention, and its further groove is vertical with first direction;
Fig. 8 is the pin head set base of the high-safety injection tube of preferred embodiment of the present invention and the another sketch map that combines of retainer component, and wherein the pin head set base is after pin head set base among Fig. 7 rotates an angle, to combine with retainer component again;
Fig. 9 injects a sketch map that finishes for the high-safety injection tube of preferred embodiment of the present invention, and wherein protuberance enters second through hole of pin head set base; And
Figure 10 for the high-safety injection tube of preferred embodiment of the present invention after using the syringe needle group and a sketch map of pin head set base retraction, wherein syringe needle group and pin head set base are pulled in the cylindrical shell.
Symbol description among the figure:
10 high-safety injection tubes
11 syringe needle groups
111 needle holder
112 needle bodies
113 first convergence parts
12 cylindrical shells
13 push rods
131 second convergence parts
20 high-safety injection tubes
21 cylindrical shells
211 grip parts
22 syringe needle groups
221 needle bodies
222 needle holder
223 first through holes
23 pin head set bases
231 second through holes
232 grooves
232 ' groove
233 bottom surfaces
24 retainer components
241 first sour jujube portions
242 second sour jujube portions
243 junction surfaces
244 bodies
245 openings
25 push rods
251 pistons
252 protuberances
The D1 first direction
The D2 second direction
The specific embodiment
Hereinafter with reference to relevant drawings, the high-safety injection tube according to preferred embodiment of the present invention is described.
As shown in Figure 3, high-safety injection tube 20 comprises a cylindrical shell 21, a syringe needle group 22, a pin head set base 23, a retainer component 24 and a push rod 25.
As shown in Figure 3, an end of needle holder 222 is provided with for needle body 221, and the other end then links with pin head set base 23.Wherein, needle holder 222 has one first through hole 223, and injection then can enter needle body 221 by first through hole 223, sends in patient's body again.
Pin head set base 23 links with an end of cylindrical shell 21, and pin head set base 23 has one second through hole 231, and syringe needle group 22 is positioned at second through hole, 231, the first through holes 223 and communicates with second through hole 231.In addition, the mode of connection of pin head set base 23 and needle holder 222 can be the screw thread that utilizes on the pin head set base 23, to screw togather with needle holder 222.Certainly, the binding of needle holder 222 and pin head set base 23 also can be mutual clamping.
In the present embodiment, needle holder 222 links with screw-in version with pin head set base 23, after medical personnel inject injection with high-safety injection tube 20, i.e. and the actual needs of the blood vessel thickness of visual sufferer and change pin.And when changing pin,, operate quite easy as long as the syringe needle group 22 of outwarding winding original reinstalls the syringe needle group 22 with different thicknesses needle body 221 to get final product.
Please refer to Fig. 3 to Fig. 5, retainer component 24 has one first sour jujube portion 241 and at least one second sour jujube portion 242, and retainer component 24 combines with pin head set base 23.Wherein, the material of retainer component 24 can be a metal or a rustless steel.In the present embodiment, be example with the retainer component 24 of stainless steel, retainer component 24 is one-body molded through impact style.And, make that also the precision of retainer component 24 is easy to control owing to utilize the impact style molding.
Certainly, retainer component 24 also can have a plurality of second sour jujube portions 242, as shown in Figure 6, retainer component 24 has two second sour jujube portions 242, and the first sour jujube portion 241 is greater than the second sour jujube portion 242, and an end of the first sour jujube portion 241 can be a blunt end, and an end of the second sour jujube portion 242 can be a sharp end.
Please refer to Fig. 3 to Fig. 6 again, retainer component 24 has more a body 244, the first sour jujube portions 241 and the second sour jujube portion 242 is arranged at body 244 respectively.The first sour jujube portion 241 and the second sour jujube portion 242 by body 244 up struts make body 244 have an opening 245, passed through by to be allowed injection.
Wall has at least one rough groove parallel with first direction D1 232 outside the pin head set base 23, and retainer component 24 has at least one junction surface 243.In the present embodiment, wall has two grooves 232 outside the pin head set base 23, and retainer component 24 has two junction surfaces 243.Junction surface 243 engages with groove 232 respectively, and retainer component 24 is snapped into pin head set base 23, so that the first sour jujube portion 241 and the second sour jujube portion 242 are positioned at second through hole 231.Wherein as shown in Figure 4, junction surface 243 can be a crooked sidewall, utilizes crooked sidewall to be sticked in the groove 232, and in addition, as Fig. 5 and shown in Figure 6, junction surface 243 also can be a hook part, engages with the groove 232 ' that is the T font.And junction surface 243 can be one-body molded with the first sour jujube portion 241, the second sour jujube portion 242.
As Fig. 3 and shown in Figure 6, in the present embodiment, pin head set base 23 has more a bottom surface 233, bottom surface 233 is in the face of retainer component 24, and being adjacent to second through hole 231, being caved in to second through hole 231 by edge outside the pin head set base 23 in bottom surface 233, and fits with the body 244 of retainer component 24.Thus, when medical personnel use, be inhaled into the bubble of cylindrical shell 21 along with injection, the i.e. gradient that can cave inward along retainer component 24 and bottom surface 233, be imported in second through hole 231, can successfully discharge high-safety injection tube 20 at last, bubble ratio more can not stagnated in cylindrical shell 21.In the present embodiment, retainer component 24 and pin head set base 23 bonded modes, also has another kind of kenel: as shown in Figures 7 and 8, the groove 232 of pin head set base 23 outer walls is rough perpendicular to first direction D1, and lie across in pin head set base 23 about 2/3 places, retainer component 24 is arranged in groove 232, and combines with pin head set base 23, so that the first sour jujube portion 241 and the second sour jujube portion 242 are positioned at second through hole 231.
Please refer to Fig. 3 again, an end of push rod 25 is provided with a piston 251, and the piston end of push rod 25 has a protuberance 252.In the present embodiment, protuberance 252 can be a plastic bar.When promoting push rod 25 toward first direction D1,251 extruding of piston injection makes injection via second through hole 231 of pin head set base 23, first through hole 223 of needle holder 222 and the passage of needle body 221, and enter human body by cylindrical shell 21.
In addition, first sour jujube portion 241 and the second sour jujube portion 242 of retainer component 24 before assembling is in the same plane, after can assembling by the time, again the first sour jujube portion 241 and the second sour jujube portion 242 are strutted with a stock, make win sour jujube portion 241 and the second sour jujube portion 242 be arranged in second through hole 231, and the distance that the first sour jujube portion 241 and the second sour jujube portion 242 strut is less than the diameter of protuberance 252.
In the present embodiment, when syringe cylinder 20 safe in utilization is injected, support the grip part 211 of cylindrical shell 21, and promote push rod 25 simultaneously and move, discharge fully up to injection towards first direction D1 with banjo splint.
Please refer to Fig. 9, because the distance that the first sour jujube portion 241 and the second sour jujube portion 242 strut, less than the diameter of protuberance 252, so inject when finishing, the first sour jujube portion 241 and the second sour jujube portion 242 prop up protuberance 252 respectively.
As shown in figure 10, when push rod 25 retracts toward a second direction D2, the first sour jujube portion 241 can push protuberance 252 toward the second sour jujube portion 242, therefore, the second sour jujube portion 242 promptly can embed protuberance 252, so syringe needle group 22 and pin head set base 23 can be pulled in the cylindrical shell 21 together, be exposed to outside the cylindrical shell 21 with the needle body of avoiding having polluted 221, and cause acupuncture accident.
And be incorporated into the retainer component 24 of pin head set base 23, then can embed protuberances 252, and the first sour jujube portion 241 still props up protuberance 252, and make that the syringe needle group 22 and the pin head set base 23 of pulling back are fulcrum with the second sour jujube portion 242 because of the second sour jujube portion 242, and the askew cylindrical shell 21 that places.Therefore; when promoting push rod 25,221 of crooked needle bodies can be blocked by cylindrical shell 21 inwalls, even therefore flexural deformation if want syringe needle group 22 and pin head set base 23 are released that cylindrical shell 21 is reused again; and can't reuse the needle body 221 that has been polluted, so can protect medical personnel's safety.
In sum, high-safety injection tube of the present invention have the retainer component that is incorporated into the pin head set base, and retainer component has the first sour jujube portion and the second sour jujube portion.When injection finished, the piston of push rod front end was pushed into the pin head set base, made win sour jujube portion and the second sour jujube portion prop up protuberance.When retracting push rod, the first sour jujube portion of retainer component can push protuberance toward the second sour jujube portion backward, and the second sour jujube portion that makes embeds protuberance, and then makes whole syringe needle group and pin head set base be pulled in the cylindrical shell, exposes and causes acupuncture accident with the needle body of avoiding having polluted.Compared to the prior art, high-safety injection tube of the present invention does not need the inwall of pin head set base to form with ejection formation and has corresponding holding section, finishes the moving part that engages with the protuberance of push rod front end but utilize with the bonded retainer component of pin head set base.Moreover the first sour jujube portion pushes protuberance toward the second sour jujube portion, and the second sour jujube portion embeds protuberance, so when retracting syringe needle group and pin head set base, with the askew push rod front end that places of the bonded pin head set base of retainer component, therefore can avoid repeated use.In addition, retainer component utilizes impact style one-body molded, has promoted the production precision of retainer component greatly, so also increased the yield of product.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the described claim scope its equivalent modifications of carrying out or change.
Claims (18)
1. a high-safety injection tube is characterized in that, comprises:
One cylindrical shell;
One syringe needle group has a needle body and a needle holder, and described needle body is arranged at described needle holder, and described needle holder has one first through hole;
One pin head set base, with the end binding of this cylindrical shell, described pin head set base has one second through hole, and this syringe needle group is positioned at described second through hole, and described first through hole communicates with described second through hole;
One retainer component, it has one first sour jujube portion, and at least one second sour jujube portion that is oppositely arranged with the first sour jujube portion, and described retainer component combines with described pin head set base; And
One push rod, the one end is provided with a piston, and the piston end of described push rod has a protuberance, and when described push rod was pushed into described pin head set base toward a first direction, described first sour jujube portion and the described second sour jujube portion propped up described protuberance respectively.
2. high-safety injection tube as claimed in claim 1 is characterized in that, described pin head set base has a bottom surface, the described retainer component of described bottom surface faces, and be adjacent to described second through hole.
3. high-safety injection tube as claimed in claim 2 is characterized in that, is caved in to described second through hole by edge outside the described pin head set base in described bottom surface.
4. high-safety injection tube as claimed in claim 1 is characterized in that, wall has at least one groove outside the described pin head set base.
5. high-safety injection tube as claimed in claim 4 is characterized in that, described groove is slightly parallel with described first direction, and described retainer component has at least one junction surface, and this junction surface engages with described groove.
6. high-safety injection tube as claimed in claim 4 is characterized in that, perpendicular to described push rod direction of propulsion, described retainer component is arranged in described groove to described groove, and combines with described pin head set base in fact.
7. high-safety injection tube as claimed in claim 5 is characterized in that, described junction surface is a crooked sidewall or is a hook part.
8. high-safety injection tube as claimed in claim 2 is characterized in that described retainer component has a body, and described first sour jujube portion and the described second sour jujube portion are arranged at described body respectively, fits in described body and described bottom surface.
9. high-safety injection tube as claimed in claim 1 is characterized in that, the described first sour jujube portion is greater than the described second sour jujube portion.
10. high-safety injection tube as claimed in claim 1 is characterized in that, the end of the described first sour jujube portion is a blunt end.
11. high-safety injection tube as claimed in claim 1 is characterized in that, the end of the described second sour jujube portion is a sharp end.
12. high-safety injection tube as claimed in claim 1 is characterized in that, described retainer component has a plurality of second sour jujube portions.
13. high-safety injection tube as claimed in claim 12 is characterized in that, the end of the described second sour jujube portion is respectively a sharp end.
14. high-safety injection tube as claimed in claim 1 is characterized in that, after having injected, described push rod moves toward a second direction opposite with described first direction, and the described first sour jujube portion makes described protuberance skew, and the described second sour jujube portion embeds described protuberance.
15. high-safety injection tube as claimed in claim 1 is characterized in that, the material of described retainer component is a metal.
16. high-safety injection tube as claimed in claim 15 is characterized in that, the metal material of described retainer component is a rustless steel.
17. high-safety injection tube as claimed in claim 5 is characterized in that, the described first sour jujube portion, the described second sour jujube portion and described junction surface are formed in one.
18. high-safety injection tube as claimed in claim 1 is characterized in that, described protuberance is a plastic bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100798747A CN100415313C (en) | 2004-09-23 | 2004-09-23 | Safety injection cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100798747A CN100415313C (en) | 2004-09-23 | 2004-09-23 | Safety injection cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1751754A CN1751754A (en) | 2006-03-29 |
| CN100415313C true CN100415313C (en) | 2008-09-03 |
Family
ID=36678832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100798747A Expired - Fee Related CN100415313C (en) | 2004-09-23 | 2004-09-23 | Safety injection cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100415313C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201194970Y (en) | 2008-04-16 | 2009-02-18 | 英属维尔京群岛圣采科技投资有限公司 | Safety injector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171300A (en) * | 1988-02-01 | 1992-12-15 | Medtech Group, Inc. | Disposable hypodermic syringe |
| US5431631A (en) * | 1994-10-21 | 1995-07-11 | Lu; Wen-Chin | Safety syringe with externally connectable and internally retractable self-biased needle |
| CN2423897Y (en) * | 2000-02-24 | 2001-03-21 | 王希平 | Self-destroyed safety syringe |
| CN1104914C (en) * | 1994-07-29 | 2003-04-09 | 黄吴顺 | Simple and safety syringe having syringe needle automatically retracted by setover |
-
2004
- 2004-09-23 CN CNB2004100798747A patent/CN100415313C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171300A (en) * | 1988-02-01 | 1992-12-15 | Medtech Group, Inc. | Disposable hypodermic syringe |
| CN1104914C (en) * | 1994-07-29 | 2003-04-09 | 黄吴顺 | Simple and safety syringe having syringe needle automatically retracted by setover |
| US5431631A (en) * | 1994-10-21 | 1995-07-11 | Lu; Wen-Chin | Safety syringe with externally connectable and internally retractable self-biased needle |
| CN2423897Y (en) * | 2000-02-24 | 2001-03-21 | 王希平 | Self-destroyed safety syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1751754A (en) | 2006-03-29 |
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Granted publication date: 20080903 Termination date: 20091023 |