CN1054376A - Use the once syringe of back self-destruction - Google Patents
Use the once syringe of back self-destruction Download PDFInfo
- Publication number
- CN1054376A CN1054376A CN 90101139 CN90101139A CN1054376A CN 1054376 A CN1054376 A CN 1054376A CN 90101139 CN90101139 CN 90101139 CN 90101139 A CN90101139 A CN 90101139A CN 1054376 A CN1054376 A CN 1054376A
- Authority
- CN
- China
- Prior art keywords
- syringe
- cone
- bayonet socket
- flat cone
- piston rod
- 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
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention provides the once syringe of back self-destruction of a kind of use, its embodiment is: at the thin piece of the thin U type of syringe piston top design one, connect a dop on the thin piece of U type, in the syringe needle vestibule with on the corresponding position of dop, design a bayonet socket, make dop when injection finishes, just enter bayonet socket and stuck by bayonet socket, thereby piston can not back be twitched, and piston will be torn from the thin piece of U type if twitch then by force, promptly cause syringe not reuse and self-destruction.
Description
The present invention is a kind of new medical syringe.
Common injector for medical purpose, form by syringe cylinder, syringe piston, piston rod and entry needle are first-class, this piston can slidably reciprocate any position in syringe cylinder together with piston rod, make syringe to reuse and do not damage syringe that the shortcoming of this syringe is because syringe can be reused the bacterial cross-infection that causes easily by the injector.
The purpose of this invention is to provide the once syringe of back self-destruction of a kind of use.Its embodiment is: at the thin piece of the thin U type of syringe piston top design one, connect a dop on the thin piece of U type, in the syringe needle vestibule with on the corresponding position of dop, design a bayonet socket, make dop when injection finishes, just enter bayonet socket and blocked by bayonet socket, thereby piston can not back be twitched, piston will be torn from the thin piece of U type if twitch then by force, promptly cause syringe not reuse and self-destruction.
Following the present invention is described in detail.
Fig. 1 is the syringe construction sketch map, Fig. 2 be among Fig. 1 A-A to the cross section view after amplifying, wherein 1 represents syringe cylinder, 2 expression syringe pistons, 3 expression syringe piston rods, 4 expressions protrude from the flat cone (dop) of top land, 5 and 6 the expression flat cone the plane of symmetry on two hollow joints that width is different, pin hole chamber on the 7 expression syringe cylinders, 8 expression pin hole chamber bayonet sockets, the thin piece of U type that 9 expression top land centre are connected with flat cone, two cavitys that are separated by piston in the 10 and 11 expression syringe cylinders, warning line on the 12 expression piston rods, the little marker post whether syringe has used is differentiated in 13 expressions.
Syringe is by syringe cylinder 1, syringe piston 2, syringe piston rod 3 is formed, the center of top place of syringe piston, the one flat cone 4(dop that protrudes from the top is arranged), one hollow joint 5 and another hollow joint 6 arranged on the plane of symmetry of flat cone, the degree of depth of two hollow joints all arrives top land from flat cone top, wherein the width of a hollow joint is greater than the width of (or less than) another hollow joint, when flat cone 4 advances with piston forward and enter the pin hole chamber 7 of syringe cylinder through bayonet socket, bayonet socket promptly pushes flat cone, thereby a narrower hollow joint overlaps when extruding and makes flat cone become positive cone in the flat cone, the base diameter and the bayonet socket equal diameters of positive cone cone, make positive cone can just pass bayonet socket and enter the pin hole chamber, when flat cone is squeezed into positive cone by bayonet socket, narrower on it hollow joint just in time overlaps, another hollow joint of broad then becomes narrower, this moment, the injection of injection tube intracavity still can enter the pin hole chamber by an above-mentioned back hollow joint, so that injection process carries out smoothly.Positive cone no longer is subjected to the bayonet socket extruding and reverts to the flat cone shape that is slightly larger than positive cone after all entering the pin hole chamber, bayonet socket blocks flat cone, flat cone can not be moved with piston and piston rod, and injection was just injected and was finished this moment, finished whole injection process.Above-mentioned syringe piston center of top place, its part that is connected with flat cone is the thin piece 9 of a U type.The thin piece of this U type is as the part of top land, other parts than top land are obviously thinner, after flat cone all enters the pin hole chamber and is blocked by bayonet socket (i.e. injection finish back), as with piston rod when carrying out using the second time (be about to syringe) when pulling back, top land then is subjected to the pulling force effect of flat cone, to be torn at the thin piece place of U type, cavity 10 is communicated with cavity 11, promptly the ineffective syringe that causes of syringe piston damages.
When using syringe to inject, when cone begins to enter bayonet socket.The injector must strengthen injection force a little, so that being squeezed into positive cone, flat cone enters bayonet socket, therefore be necessary when cone begins to enter bayonet socket, the injector to be pointed out, for this reason, also slightly protrude from the warning line 12 of piston rod when flat cone has just begun to enter the pin hole chamber in design one on the piston rod around piston rod, this warning line also just begins to enter the syringe cylinder cavity, and the prompting injector should strengthen injection force at this moment a little.For making new syringe and obvious difference being arranged through used syringe cylinder, be not provided with a small tenon will 13 between the end at syringe cylinder and piston rod, one end and the piston rod of this little sign do not hold be connected and its connect area should be less, so that this little marker post is torn in the use syringe easily, this little marker post indicates then that once being torn this syringe was used.In addition, another effect of this little sign is to prevent that the mistake of syringe piston rod from advancing and the breaking-up syringe, before small tenon will is torn, advanced as syringe piston rod by mistake, little marker post promptly plays the propulsive effect of piston rod mistake that stops between syringe cylinder and syringe piston rod.
Injector for medical purpose of the present invention is using once back self-destruction owing to structurally guarantee syringe, thereby causes the drawback of eqpidemic disease cross infection when having avoided syringe to reuse easily.
Claims (4)
1, the injector for medical purpose of self-destruction after a kind of disposable use, by syringe cylinder 1, syringe piston 2, syringe piston rod 3 is formed, it is characterized in that, there is a flat cone 4 (dop) that protrudes from the top at the center of top place of said syringe piston, one hollow joint 5 and another hollow joint 6 arranged on the plane of symmetry of flat cone, the degree of depth of two hollow joints all arrives top land from flat cone top, wherein the width of a hollow joint is greater than the width of (or less than) another hollow joint, when flat cone 4 advances with piston forward and enter the pin hole chamber 7 of syringe cylinder through its bayonet socket 8, bayonet socket promptly pushes flat cone, thereby a narrower hollow joint overlaps when extruding and makes flat cone become positive cone in the flat cone, the base diameter and the bayonet socket equal diameters of positive cone, make positive cone can just pass bayonet socket and enter the pin hole chamber, when flat cone is squeezed into positive cone by bayonet socket, narrower on it hollow joint just in time overlaps, another hollow joint of broad then becomes narrower, this moment, the injection of injection tube intracavity still can enter the pin hole chamber by an above-mentioned back hollow joint, so that injection process carries out smoothly, positive cone no longer is subjected to the bayonet socket extruding and reverts to the flat cone shape that is slightly larger than positive cone after all entering the pin hole chamber, bayonet socket blocks flat cone, and flat cone can not be moved together with piston and piston rod.
2, according to the described syringe of claim, it is characterized in that, said syringe piston center of top place, its part that is connected with flat cone 4 is the thin piece 9 of U type, and the thin piece of this U type is as the part of top land, and is thinner than other parts of top land, after flat cone all enters the pin hole chamber and is blocked by pin hole chamber bayonet socket, as with piston rod when pulling back, top land will be torn at the thin piece place of U type, and cavity 10 is communicated with cavity 11.
3, syringe according to claim 1, it is characterized in that said piston rod has one around piston rod and slightly protrude from the warning line 12 of piston rod, when flat cone has just begun to enter the pin hole chamber, this warning line also just begins to enter the injection tube cavity, plays suggesting effect.
4, syringe according to claim 1 is characterized in that, syringe cylinder and piston rod a little marker post 13 do not arranged between the end, an end of this little marker post is not held with piston rod and is connected.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101139 CN1054376A (en) | 1990-02-28 | 1990-02-28 | Use the once syringe of back self-destruction |
| US07/661,908 US5106371A (en) | 1990-02-28 | 1991-02-27 | Clinical Syringe to be rendered useless after being used once |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101139 CN1054376A (en) | 1990-02-28 | 1990-02-28 | Use the once syringe of back self-destruction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1054376A true CN1054376A (en) | 1991-09-11 |
Family
ID=4876957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90101139 Pending CN1054376A (en) | 1990-02-28 | 1990-02-28 | Use the once syringe of back self-destruction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1054376A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100563736C (en) * | 2007-06-02 | 2009-12-02 | 丁锐 | Disposable anti-stabbed syringe |
| CN106619105A (en) * | 2016-12-01 | 2017-05-10 | 王德元 | Disposable acupuncture needle inserter |
-
1990
- 1990-02-28 CN CN 90101139 patent/CN1054376A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100563736C (en) * | 2007-06-02 | 2009-12-02 | 丁锐 | Disposable anti-stabbed syringe |
| CN106619105A (en) * | 2016-12-01 | 2017-05-10 | 王德元 | Disposable acupuncture needle inserter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |