CN215537345U - Syringe for preventing puncture of oral cavity anesthesia - Google Patents
Syringe for preventing puncture of oral cavity anesthesia Download PDFInfo
- Publication number
- CN215537345U CN215537345U CN202120864252.4U CN202120864252U CN215537345U CN 215537345 U CN215537345 U CN 215537345U CN 202120864252 U CN202120864252 U CN 202120864252U CN 215537345 U CN215537345 U CN 215537345U
- Authority
- CN
- China
- Prior art keywords
- injection
- syringe
- retraction
- tube
- injection tube
- 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
Links
- 206010002091 Anaesthesia Diseases 0.000 title claims abstract description 19
- 230000037005 anaesthesia Effects 0.000 title claims abstract description 19
- 210000000214 mouth Anatomy 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 73
- 239000007924 injection Substances 0.000 claims abstract description 73
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 13
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 13
- 241001330002 Bambuseae Species 0.000 claims description 13
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 13
- 239000011425 bamboo Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 6
- 210000002200 mouth mucosa Anatomy 0.000 abstract description 5
- 206010064091 Iatrogenic infection Diseases 0.000 abstract description 2
- 229940127554 medical product Drugs 0.000 abstract description 2
- 230000003444 anaesthetic effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000003814 drug Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 239000004081 narcotic agent Substances 0.000 description 2
- 230000036407 pain Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model belongs to the technical field of oral medical instruments, and particularly discloses an oral anesthesia puncture-proof injector which comprises an injection tube, a piston, a pull rod, a needle head and an injection needle, wherein a retraction tube is arranged in the injection tube, the needle head is fixed on the retraction tube, a spiral groove is formed in the inner wall of the injection tube, a bulge in sliding connection with the spiral groove is formed in the outer wall of the retraction tube, a clamping groove is formed in the inner wall of the retraction tube, a connecting circular truncated cone is arranged on one side, close to the retraction tube, of the piston, the outer diameter of the connecting circular truncated cone does not exceed the inner diameter of the retraction tube, and a clamping strip matched with the clamping groove is arranged on the outer wall of the connecting circular truncated cone. By adopting the scheme of the utility model, the injection needle retracts into the injection tube after the injection is finished, so that the injection needle can not stab the oral mucosa of a patient when the injection tube is taken out from the oral cavity of the patient; in addition, the injector is a disposable medical product, and when the injector is discarded to a special medical garbage can, the risk of iatrogenic infection of garbage disposal personnel caused by sharp injection can be prevented.
Description
Technical Field
The utility model belongs to the technical field of oral medical instruments, and particularly relates to an oral anesthesia puncture-preventing injector.
Background
In order to reduce the pain of a patient, the patient needs to be locally anesthetized before tooth extraction or certain oral treatment, but the prior anesthetic injector commonly used in the oral cavity structurally comprises an injection tube, a piston, a pull rod, a needle head and an injection needle, wherein the piston is slidably connected in the injection tube, the pull rod is fixed with the piston, the injection needle is fixed on the needle head and is communicated with the injection tube.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides an oral anesthesia puncture-preventing injector, which aims to solve the problem that when the injector is taken out from the oral cavity of a patient after injection is finished, the oral mucosa of the patient is punctured by an injection needle inevitably, and great pain is brought to the patient by the injection needle.
In order to achieve the purpose, the utility model adopts the following technical scheme:
oral cavity anesthesia prevents stabbing syringe, including injection tube, piston, pull rod, syringe needle and syringe needle, be equipped with in the injection tube and return a section of thick bamboo that contracts, the syringe needle is fixed on returning a section of thick bamboo that contracts, has seted up the helicla flute on the inner wall of injection tube, return be equipped with on the outer wall of a section of thick bamboo with helicla flute sliding connection's arch that contracts, return and seted up the draw-in groove on the section of thick bamboo inner wall that contracts, the piston is close to and contracts a section of thick bamboo one side and is equipped with the connection round platform, the external diameter of connecting the round platform does not surpass the internal diameter that returns a section of thick bamboo, be equipped with on the outer wall of connecting the round platform with draw-in groove complex card strip.
Compared with the prior art, the utility model has the following beneficial effects:
this scheme is before the injection, medical personnel drive the piston through the pull rod and slide to the outside, need not rotate the pull rod this moment, thereby get into the injection tube after the narcotic drug, carry out oral cavity anesthesia to the patient and handle, the medicine in the injection tube is whole to be injected the patient oral cavity after, connect the round platform this moment and be located and return a section of thick bamboo, and card strip and draw-in groove cooperation, medical personnel are through twisting the pull rod, make and connect the round platform and return a synchronous rotation of a section of thick bamboo, medical personnel are in twisting the pull rod, outside pulling pull rod, make and return a section of thick bamboo and the synchronous to the injection tube removal of syringe needle, after the injection tube is all withdrawed to the syringe needle, medical personnel take out the patient oral cavity with the syringe, just so can prevent that the syringe needle from stabbing patient's oral mucosa.
In the scheme, the injection needle retracts into the injection tube after injection is finished, so that the injection needle cannot stab the oral mucosa of a patient when the injector is taken out from the oral cavity of the patient; in addition, the injector is a disposable medical product, and when the injector is discarded to a special medical garbage can, the risk of iatrogenic infection of garbage disposal personnel caused by sharp injection can be prevented.
Furthermore, the end part of the pull rod is provided with a butterfly-shaped sheet.
Has the advantages that: the butterfly-shaped piece is convenient for medical personnel to rotate the pull rod after anesthesia operation.
Furthermore, the tip integrated into one piece that the injection tube is close to pull rod one end has the excircle, and the external diameter of excircle is greater than the external diameter of injection tube.
Has the advantages that: the setting of excircle makes when the injection, makes things convenient for medical personnel to hand the excircle, accomplishes the anesthesia injection.
Furthermore, an inner circle is integrally formed at one end of the injection tube, which is close to the needle head, and the inner diameter of the inner circle is smaller than that of the injection tube; the inner circle is provided with a ring groove located inside the injection tube, and the end, close to the inner circle, of the retraction cylinder is integrally formed with a sealing strip matched with the ring groove.
Has the advantages that: the arrangement is used for improving the sealing performance between the retraction cylinder and the injection cylinder and preventing the anesthetic from leaking.
Furthermore, a flow guide hole for communicating the injection needle with the injection tube is formed in the retraction tube.
Has the advantages that: therefore, the anesthetic in the injection tube enters the injection needle through the flow guide hole, and the flow guide effect is achieved on the anesthetic.
Furthermore, the bulges are provided with a plurality of bulges which are connected in the spiral groove in a sliding manner.
Has the advantages that: this improves the stability of the connection as the retraction barrel rotates within the barrel.
Further, the length of the connecting circular truncated cone is not less than that of the retraction cylinder.
Has the advantages that: therefore, the connecting circular truncated cone can fill the whole retraction barrel, and the anesthetic in the injection barrel is completely discharged.
Furthermore, the clamping grooves are arranged in a plurality of positions and are distributed at equal intervals along the circumferential direction of the retraction cylinder.
Has the advantages that: therefore, when the connecting circular truncated cone drives the retraction cylinder to synchronously rotate, the clamping strips in each clamping groove are stressed averagely, and the torsion force is prevented from being concentrated on one clamping strip.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
FIG. 2 is a schematic view of the retraction barrel and needle of the present invention.
Fig. 3 is a cross-sectional view taken along the line a-a in fig. 2.
Fig. 4 is a left side view of the connecting boss of fig. 1.
Reference numerals in the drawings of the specification include: the injection tube 10, the piston 11, the pull rod 12, the butterfly-shaped piece 13, the outer circle 14, the inner circle 15, the retraction tube 16, the protrusion 17, the clamping groove 18, the connecting circular truncated cone 19, the clamping strip 20, the sealing strip 21, the needle 22, the injection needle 23 and the diversion hole 24.
Detailed Description
The utility model is further described in detail below with reference to the accompanying drawings, and specific embodiments are given.
The embodiment is basically as shown in fig. 1, and the oral anesthesia puncture-preventing injector comprises an injection cylinder 10, a piston 11 is connected in the injection cylinder 10 in a sliding and sealing manner, a pull rod 12 is fixed at one end of the piston 11, a butterfly sheet 13 positioned outside the injection cylinder 10 is arranged at the end part of the pull rod 12, an outer circle 14 is integrally formed at the end part of the injection cylinder 10 close to one end of the pull rod 12, the outer diameter of the outer circle 14 is larger than that of the injection cylinder 10, an inner circle 15 is integrally formed at the end of the injection cylinder 10 far away from the outer circle 14, and the inner diameter of the inner circle 15 is smaller than that of the injection cylinder 10.
A retraction cylinder 16 is rotatably connected to the syringe barrel 10 adjacent to the inner circle 15, as shown in fig. 2 and 3, and specifically: a spiral groove (not shown) is formed on the inner wall of the syringe 10, a plurality of protrusions 17 are integrally formed on the outer wall of the retraction cylinder 16, and the plurality of protrusions 17 are slidably connected in the spiral groove. One end of the retraction cylinder 16, which is close to the inner circle 15, is closed, four clamping grooves 18 are formed in the inner wall of the retraction cylinder 16, the four clamping grooves 18 are distributed at equal intervals along the circumferential direction of the retraction cylinder 16, the cross section of each clamping groove 18 in the embodiment is in a trapezoid shape with a narrow inner part and a wide outer part, as shown in fig. 4, a connecting circular truncated cone 19 is integrally formed at the end part of the piston 11, which is far away from the pull rod 12, the outer diameter of the connecting circular truncated cone 19 does not exceed the inner diameter of the retraction cylinder 16, the length of the connecting circular truncated cone 19 is not smaller than the length of the retraction cylinder 16, four clamping strips 20 are integrally formed on the outer wall of the connecting circular truncated cone 19, and the shapes and the positions of the clamping strips 20 are matched with the clamping grooves 18 one by one.
A ring groove positioned in the injection cylinder 10 is formed on the inner circle 15, and a sealing strip 21 matched with the ring groove is further integrally formed at one end of the retraction cylinder 16 close to the inner circle 15; a needle 22 positioned outside the injection cylinder 10 is further integrally formed at the end of the retraction cylinder 16, an injection needle 23 is horizontally fixed on the needle 22, the injection needle 23 can completely enter the injection cylinder 10, and a diversion hole 24 communicating the injection needle 23 and the injection cylinder 10 is formed in the retraction cylinder 16.
When taking medicine, medical personnel drive piston 11 through pull rod 12 and slide to the right side, need not rotate pull rod 12 this moment, after getting into injection tube 10 with narcotic drug, carry out oral cavity anesthesia treatment to the patient, after injecting the medicine in injection tube 10 in the patient oral cavity completely, connect round platform 19 and be located and retract a section of thick bamboo 16 this moment, and each card strip 20 cooperates with draw-in groove 18, medical personnel twist pull rod 12 through butterfly piece 13, make and connect round platform 19 and retract section of thick bamboo 16 synchronous rotation, medical personnel twist back pull rod 12 simultaneously, outwards stimulate pull rod 12, make and retract section of thick bamboo 16 and syringe needle 22 and move to injection tube 10 in step, after injection tube 10 is all retrieved to syringe needle 23, medical personnel take out the patient oral cavity with the syringe, prevent like this that injection needle 23 from stabbing patient's oral mucosa.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. Oral cavity anesthesia prevents stabbing syringe, including injection tube, piston, pull rod, syringe needle and syringe needle, its characterized in that: the syringe is internally provided with a retraction barrel, the needle head is fixed on the retraction barrel, the inner wall of the syringe is provided with a spiral groove, the outer wall of the retraction barrel is provided with a bulge which is connected with the spiral groove in a sliding manner, the inner wall of the retraction barrel is provided with a clamping groove, one side of the piston, which is close to the retraction barrel, is provided with a connection round table, the outer diameter of the connection round table does not exceed the inner diameter of the retraction barrel, and the outer wall of the connection round table is provided with a clamping strip which is matched with the clamping groove.
2. The oral anesthesia puncture-preventing syringe of claim 1, wherein: the end part of the pull rod is provided with a butterfly-shaped sheet.
3. The oral anesthesia puncture-preventing syringe of claim 1, wherein: the end part of the injection tube close to one end of the pull rod is integrally formed with an outer circle, and the outer diameter of the outer circle is larger than that of the injection tube.
4. The oral anesthesia puncture-preventing syringe of claim 1, wherein: an inner circle is integrally formed at one end of the injection tube, which is close to the needle head, and the inner diameter of the inner circle is smaller than that of the injection tube; the inner circle is provided with a ring groove located inside the injection tube, and the end, close to the inner circle, of the retraction cylinder is integrally formed with a sealing strip matched with the ring groove.
5. The oral anesthesia puncture-preventing syringe of claim 1, wherein: a flow guide hole for communicating the injection needle with the injection tube is formed in the retraction tube.
6. The oral anesthesia puncture-preventing syringe of claim 1, wherein: the bulges are provided with a plurality of bulges which are connected in the spiral groove in a sliding way.
7. The oral anesthesia puncture-preventing syringe of claim 1, wherein: the length of the connecting circular truncated cone is not less than that of the retraction cylinder.
8. The oral anesthesia puncture-preventing syringe according to any one of claims 1 to 7, wherein: the draw-in groove is equipped with a plurality ofly, and a plurality of draw-in grooves along the equidistant distribution of circumference of contracting a section of thick bamboo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120864252.4U CN215537345U (en) | 2021-04-25 | 2021-04-25 | Syringe for preventing puncture of oral cavity anesthesia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120864252.4U CN215537345U (en) | 2021-04-25 | 2021-04-25 | Syringe for preventing puncture of oral cavity anesthesia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215537345U true CN215537345U (en) | 2022-01-18 |
Family
ID=79857271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120864252.4U Expired - Fee Related CN215537345U (en) | 2021-04-25 | 2021-04-25 | Syringe for preventing puncture of oral cavity anesthesia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215537345U (en) |
-
2021
- 2021-04-25 CN CN202120864252.4U patent/CN215537345U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220118 |