CN1240448C - Disposable safety self destruction injector - Google Patents
Disposable safety self destruction injector Download PDFInfo
- Publication number
- CN1240448C CN1240448C CN 03139173 CN03139173A CN1240448C CN 1240448 C CN1240448 C CN 1240448C CN 03139173 CN03139173 CN 03139173 CN 03139173 A CN03139173 A CN 03139173A CN 1240448 C CN1240448 C CN 1240448C
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- CN
- China
- Prior art keywords
- syringe
- push rod
- head
- needle
- connection block
- 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.)
- Expired - Fee Related
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The present invention provides a disposable safety self destruction injector which comprises a needle head, a connecting socket, a rubber plug, a push rod and a needle cylinder, wherein a standard needle head is used for the needle head, and the connecting socket is arranged in a shrinkage cavity on the top end of the needle cylinder and is in damping seal with the inner surface of the shrinkage cavity. The present invention is characterized in that the front end of the connecting socket is in threaded connection with the needle cylinder to ensure a sealing surface be tightly combined, the center of the connecting socket is a penetrative physic liquor channel, the bottom of the physic liquor channel is a toothed hole with internal teeth, and a reducing clamping hole is positioned on the front end of the toothed hole; the front end of the push rod positioned on the rubber plug is provided with a tooth column which is engaged with the toothed hole, a clamping head is arranged on the front end of the tooth column and comprises a head section and a circular cylinder, and the cross section of the end of the head section is larger than the cross sections of the clamping hole and the circular cylinder. When the push rod is pushed to an end to finish the injection, the clamping head enters the clamping hole to make the push rod integrally connected with the connecting socket, and the tooth column is engaged with the toothed hole. When the push rod is rotated to be drawn back, the needle head and the connecting socket are retracted to be hidden in the needle cylinder following the push rod, and thus, disposable performance, safety and self destroying are really realized.
Description
Affiliated technical field
The invention provides a kind of disposable safety self-breaking injector, belong to the injector technology field.
Background technology
Present disposable syringe is provided with injection back self-destroying function more, prevents from repeatedly to use, and causes adverse consequences to patient.After syringe used the contact sick body, outside contaminated syringe needle just was exposed to, medical worker or cleaning employee did not note slightly, are very easily infected by needle sting.At the problems referred to above, existing at present technology report about safe re-use preventing once-used syringe, as Chinese patent communique disclosed utility model patent on April 17th, 2002: the safety self-destructing disposable sterilized syringe, the patent No.: 01221139 by overcoat, core bar in the overcoat, the sealing ring of core bar head, the syringe needle that is connected with overcoat, and pinhead sleeve etc. form, the forward connection tube of its overcoat, the needle stand of syringe needle are installed in the overcoat connection tube, outer wall at needle stand is equipped with spring, and core bar is a hollow pipe, on the top of core bar bottom plug is installed, and the core bar bottom plug matches with the afterbody of needle seat, after the liquid medicine injection injection finishes, core bar bottom plug and syringe needle in the automatic indentation core bar, prevent that syringe needle from scratching skin and causing infection under the effect of spring force, avoid after the self-destruction reusing.Defective is that parts are many, complex structure, cost height.
Summary of the invention
The purpose of this invention is to provide a kind of can overcome above-mentioned defective, simple in structure, be suitable for producing in batches, the disposable safety self-breaking injector of excellent working performance.Its technical scheme is:
Comprise syringe needle, Connection Block, plug, push rod and syringe, wherein syringe needle adopts standard needle, Connection Block places in the vertical reducing of syringe and with its inner surface damping and seals, plug places in the syringe and with its inner surface damping and seals, push rod push-and-pull in syringe is slided, it is characterized in that: the front end outer surface of Connection Block is provided with lug, the syringe inner surface is provided with one section screw thread, both are threaded, the end of Connection Block is conical seal (contact) face and syringe cone-shaped inner surface damping sealing, the center is the medicine liquid channel that runs through, the bottom of medicine liquid channel is the perforation that is provided with internal tooth, what be positioned at the perforation front end is the connecting hole of undergauge, the corresponding tooth post of setting up dop and having external tooth with it, wherein the tooth post is located at push rod front end and protruding front end in plug and is used with perforation and mesh, dop is arranged on tooth post front end, comprise a head and a cylinder, head is linked to the cylinder front end, and the cross section of head front end is little than the rear end, the cross section of its rear end is slightly larger than connecting hole and cylindrical cross-section, and head and tooth post are provided with guiding gutter.
Described disposable safety self-breaking injector, the thread rotary orientation of syringe needle and Connection Block is opposite with the thread rotary orientation of Connection Block and syringe.
Described disposable safety self-breaking injector is positioned at push rod on the rib muscle of syringe and is provided with the mouth that fractures.
Its operation principle is: after the syringe pump injecting liquid drug finishes, dop enters in it along with the propelling of push rod supports out connecting hole, because making push rod engage with Connection Block, the condensation of connecting hole is one, the tooth post also entered perforation both meshed together this moment, the reverse rotation push rod is because the engagement of tooth post and perforation, will make that Connection Block rotates synchronously with push rod, final Connection Block is threaded with the syringe disengaging, the pumpback push rod, syringe needle, Connection Block will be hidden in the syringe in company with the push rod retraction, prevent that syringe needle from scratching skin and causing infection.The present invention need not any the 3rd adnexa auxiliary, lock mutually by self part and can realize self-destruction, really realize disposable, safety, self-destruction.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the structural representation that A embodiment illustrated in fig. 1 partly amplifies;
Fig. 3 is the profile of middle tooth post embodiment illustrated in fig. 1 and perforation engagement.
The specific embodiment
1, syringe needle 2, Connection Block 3, plug 4, push rod 5, syringe 6, medicine liquid channel 7, perforation 8, connecting hole 9, tooth post 10, head 11, cylinder 12, fracture mouthfuls 13, sealing ring 14, guiding gutter 15, lug 16, needle shield
Syringe needle 1 adopts standard needle to be threaded with Connection Block 2, Connection Block 2 places in the syringe 5 vertical reducings, its front end outer surface is provided with lug 15, syringe 5 inner surfacies are provided with one section screw thread, both are threaded, the end of Connection Block 2 is conical seal (contact) face and syringe 5 cone-shaped inner surface dampings sealing, its center is the medicine liquid channel 6 that runs through, the bottom of medicine liquid channel 6 is the perforation 7 that is provided with internal tooth, what be positioned at perforation 7 front ends is the connecting hole 8 of undergauge, plug 3 places in the syringe 2, its outer wall is provided with the inner surface damping sealing of sealing ring 13 with the syringe 2 of multiple tracks projection, push rod 4 push-and-pull in syringe 5 is slided, be located at push rod 4 front ends and protruding with the tooth post 9 of perforation 7 engagements in the front end of plug 3, dop is arranged on tooth post 9 front ends, comprise a head 10 and a cylinder 11, head 10 is linked to this cylinder 11 front ends, the cross section of head 10 front ends is little than the rear end, and the cross section of these head 10 rear ends is slightly larger than connecting hole 8 and cylinder 11 cross sections, head 10 and tooth post 9 are provided with guiding gutter 14 and avoid medicinal liquid residual, are positioned at push rod 4 to be provided with on the rib muscle of syringe 2 to fracture mouthfuls 12.
Claims (3)
1, a kind of disposable safety self-breaking injector, comprise syringe needle (1), Connection Block (2), plug (3), push rod (4) and syringe (5), wherein syringe needle (1) adopts standard needle, Connection Block (2) places in the vertical reducing of syringe (5) and with its inner surface damping and seals, plug (3) places in the syringe and with its inner surface damping and seals, push rod (4) push-and-pull in syringe (5) is slided, it is characterized in that: the front end outer surface of Connection Block (2) is provided with lug (15), syringe (5) inner surface is provided with one section screw thread, both are threaded, the end of Connection Block (2) is conical seal (contact) face and syringe (5) cone-shaped inner surface damping sealing, Connection Block (2) center is the medicine liquid channel (6) that runs through, the bottom of medicine liquid channel (6) is the perforation (7) that is provided with internal tooth, what be positioned at perforation (7) front end is the connecting hole (8) of undergauge, the corresponding tooth post (9) of setting up dop and having external tooth with it, wherein tooth post (9) is located at push rod (4) front end and protruding front end in plug (3) and is used with perforation (7) and mesh, dop is arranged on tooth post (9) front end, comprise a head (10) and a cylinder (11), this head (10) is linked to cylinder (11) front end, the cross section of its front end is little than the rear end, and the cross section of this head rear end is slightly larger than connecting hole (8) and cylinder (11) cross section, and head (10) and tooth post (9) are provided with guiding gutter (14).
2, disposable safety self-breaking injector as claimed in claim 1 is characterized in that: syringe needle (1) is opposite with the thread rotary orientation of syringe (5) with the thread rotary orientation and the Connection Block (2) of Connection Block (2).
3, disposable safety self-breaking injector as claimed in claim 1 is characterized in that: be positioned at push rod (4) and be provided with fracture mouthful (12) on the rib muscle of syringe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03139173 CN1240448C (en) | 2003-08-27 | 2003-08-27 | Disposable safety self destruction injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03139173 CN1240448C (en) | 2003-08-27 | 2003-08-27 | Disposable safety self destruction injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1589918A CN1589918A (en) | 2005-03-09 |
| CN1240448C true CN1240448C (en) | 2006-02-08 |
Family
ID=34597252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03139173 Expired - Fee Related CN1240448C (en) | 2003-08-27 | 2003-08-27 | Disposable safety self destruction injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1240448C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8708970B2 (en) * | 2008-06-10 | 2014-04-29 | Shl Group Ab | Injection needle assembly |
-
2003
- 2003-08-27 CN CN 03139173 patent/CN1240448C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1589918A (en) | 2005-03-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060208 Termination date: 20120827 |