CN114602031B - Injector for local anesthesia - Google Patents
Injector for local anesthesia Download PDFInfo
- Publication number
- CN114602031B CN114602031B CN202210223499.7A CN202210223499A CN114602031B CN 114602031 B CN114602031 B CN 114602031B CN 202210223499 A CN202210223499 A CN 202210223499A CN 114602031 B CN114602031 B CN 114602031B
- Authority
- CN
- China
- Prior art keywords
- gear
- sliding rod
- mounting cavity
- teeth
- rack
- 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.)
- Active
Links
- 238000002690 local anesthesia Methods 0.000 title abstract description 7
- 239000003589 local anesthetic agent Substances 0.000 claims abstract description 15
- 238000005086 pumping Methods 0.000 claims abstract description 3
- 238000009434 installation Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 abstract description 7
- 239000007924 injection Substances 0.000 abstract description 7
- 230000000977 initiatory effect Effects 0.000 abstract 3
- 210000004204 blood vessel Anatomy 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 3
- 206010002091 Anaesthesia Diseases 0.000 description 2
- 230000037005 anaesthesia Effects 0.000 description 2
- 230000003444 anaesthetic effect Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003193 general anesthetic agent Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M19/00—Local anaesthesia; Hypothermia
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
- A61M5/3135—Syringe barrels characterised by constructional features of the proximal end
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
- A61M5/3137—Specially designed finger grip means, e.g. for easy manipulation of the syringe rod
Abstract
The application provides a local anesthetic syringe, wherein a gear mounting cavity is arranged at the second end of a syringe; a back-pumping starting component is arranged in the mounting cavity; the back-drawing starting component comprises a linear sliding rod, and the second end of the sliding rod extends into the mounting cavity; the first end of the sliding rod extends to the outside through the guide tube; the first end of the sliding rod is provided with a bent elastic rod, and the first end of the elastic rod is connected to the sliding rod; the second end of the elastic rod is provided with buckling teeth corresponding to the clamping teeth; the second side of the buckling teeth forms a third guiding inclined plane; the lower side of the second end of the sliding rod forms a meshing part protruding downwards; the engagement portion is formed as a second rack to engage with the first gear at an upper side of the first gear. The local anesthesia injector can automatically bias the withdrawal initiating component when in injection, and if withdrawal is needed, the withdrawal initiating component is released by using the finger on one side of the withdrawal initiating component of the same hand to achieve the needle bolt withdrawal.
Description
Technical Field
The present application relates to a syringe, and more particularly to a syringe for local anesthesia.
Background
In local anesthesia, after the needle of the syringe is inserted into the tissue, it is necessary to first withdraw before injecting the anesthetic drug, and to check for blood return to determine that the needle is not in the blood vessel. The injection of anesthetic into the blood vessel, which would be required if the needle were to penetrate the blood vessel, is prohibited and would present a hazard to the patient's life once it occurs. Frequent needle movement is required for local anesthesia, and every time the needle is moved in tissue, retraction is required to determine that the tip of the needle is not located within the blood vessel. The injection pushing injection can be completed by only one hand, and the back drawing operation requires two hands to be matched, wherein one hand holds the needle cylinder, and the other hand pulls the needle plug. Frequent flashback can result in frequent switching from one-handed to two-handed operation during anesthesia.
Disclosure of Invention
In view of the above, the present application aims to propose a local anesthetic syringe capable of performing the action of bolus injection and withdrawal by one hand during anesthesia.
The local anesthetic syringe of the present application comprises a syringe and a pintle;
the second end of the needle cylinder is provided with a gear mounting cavity; the mounting cavity is formed into a flat tube shape, a first end of the mounting cavity is fixed with a second end of the needle cylinder, and a second end of the mounting cavity is an opening; an upper portion of the first end of the mounting cavity extends beyond the barrel; the upper part of the first end of the mounting cavity forms a guide pipe; the upper end of the first end of the guiding tube is provided with a latch, the latch is upwards protruded, a first guiding inclined plane is formed on the first side of the latch, and a second guiding inclined plane is formed on the second side of the latch;
the second end of the pintle installed in the needle cylinder extends from the installation cavity to the outside; the upper side of the pintle is formed into a first rack;
a first gear and a second roller are arranged in the mounting cavity; the first gear is positioned on the upper side of the first rack and meshed with the teeth of the first rack; the second roller is positioned at the lower side of the pintle and forms a support under the pintle;
a back-pumping starting component is arranged in the mounting cavity;
the back-drawing starting component comprises a linear sliding rod, and the second end of the sliding rod extends into the mounting cavity; the first end of the sliding rod extends to the outside through the guide tube;
the first end of the sliding rod is provided with a bent elastic rod, and the first end of the elastic rod is connected to the sliding rod; the second end of the elastic rod is provided with buckling teeth corresponding to the clamping teeth; the second side of the buckling teeth forms a third guiding inclined plane; the lower side of the second end of the sliding rod forms a meshing part protruding downwards; the engagement portion is formed as a second rack to engage with the first gear at an upper side of the first gear;
a compression spring is supported between the connecting part of the sliding rod and the elastic rod and the first end of the guide tube;
when the buckling teeth are meshed on the clamping teeth, the second rack is separated from the meshing with the first gear.
Preferably, the upper ends of the buckling teeth form an operating handle.
Preferably, the upper end of the mounting cavity forms a finger support stop.
Preferably, the lower end of the mounting cavity forms a finger support stop.
Preferably, the finger support stopper at the lower end of the installation cavity is formed in a collar shape for the finger to be inserted therein.
Preferably, the annular finger support at the lower end of the mounting cavity is capable of accommodating two fingers.
The local anesthesia injector can automatically bias the back-drawing starting component (namely, the buckling teeth are buckled on the clamping teeth, and the spring is in a compressed state) when the injector is used for injecting, if the injector needs back-drawing, the back-drawing starting component is released by using the finger on one side of the back-drawing starting component of the same hand, the back-drawing starting component can be brought to the first gear through the second rack to rotate, and then the first gear is used for bringing the needle bolt back-drawing, so that the injector does not need to be frequently switched between one-hand operation and two-hand operation in the injection process.
Drawings
FIG. 1 is a schematic view showing a front view of a local anesthetic syringe according to the present application;
FIG. 2 is a schematic side view of the local anesthetic syringe of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the local anesthetic syringe of FIG. 1;
FIG. 4 is a schematic cross-sectional view of the local anesthetic syringe of FIG. 1 with the withdrawal activation member removed;
FIG. 5 is a schematic front view of the retraction actuation member of the local anesthetic syringe of FIG. 1;
FIG. 6 is a schematic view of the local anesthetic syringe of FIG. 1 reaching a withdrawal end under the influence of a spring (not shown);
FIG. 7 is a schematic view of the local anesthetic syringe of FIG. 1 at the time of bolus injection to the bottom withdrawal point;
fig. 8 is a schematic front view of another embodiment of a local anesthetic syringe according to the present application.
Detailed Description
The local anesthetic syringe according to the present application will be described in detail with reference to the accompanying drawings.
The local anesthetic syringe of the present application comprises a cylinder 1 and a pintle 2.
The second end of the needle cylinder 1 is provided with a gear mounting chamber 3. The installation cavity 3 is formed in a flat tubular shape, a first end of which is fixed with a second end of the needle cylinder 1, and a second end of which is open.
The upper part of the first end of the mounting chamber 3 extends beyond the needle cylinder 1; the upper part of the first end of the mounting chamber 3 forms a guide tube 35.
The guide tube 35 has a latch 32 formed at an upper end of a first end thereof, the latch 32 being upwardly protruded, a first guide slope 32a being formed at a first side thereof, and a second guide slope 32b being formed at a second side thereof. The first guiding inclined plane and the second guiding inclined plane form an inverted V shape.
The second end of the pintle 2 mounted in the cylinder 1 extends from the mounting cavity 3 to the outside; the upper side of the pintle 3 forms a first rack.
A first gear 33 and a second roller 34 are arranged in the mounting cavity 3; the first gear 33 is located on the upper side of the first rack and meshed with the teeth of the first rack; the second roller 34 is located on the underside of the pintle, forming a support for the pintle thereunder. If the underside of the pintle is also formed as a rack, teeth are also formed on the outer periphery of the second roller, which mesh with the rack on the underside of the pintle to form an up-down symmetrical structure.
A back-suction starting member 4 is installed in the installation cavity 3.
The back-suction starting member 4 comprises a linear sliding rod 42, the second end of the sliding rod 42 extending into the mounting cavity 3; the first end of the slide rod 42 extends to the outside through the guide tube 35.
The first end of the slide bar 42 is formed with a curved elastic bar 41, for example, in a shape of "┎", and the first end of the elastic bar 41 is connected to the slide bar 42; the second end of the elastic lever 41 is formed with a buckling tooth 43 corresponding to the latch 32; the second side of the button teeth 43 forms a third guide slope 43a to facilitate the button teeth 43 to be fastened to the latch teeth 32 along the first guide slope of the latch teeth 32, and the first side of the button teeth 43 may form a fourth guide slope 43b to correspond to the second guide slope 32b of the button teeth 32; the lower side of the second end of the slide rod 42 forms an engagement portion 44 protruding downward; the engagement portion 44 is formed as a second rack to engage with the first gear 33 at the upper side of the first gear 33.
A compression spring 5 is supported between the connection portion of the slide rod 42 and the elastic rod 41 and the first end of the guide tube 35; the compression spring 5 provides the power for the pintle 2 to draw back after being compressed.
When the button teeth 43 are engaged on the latch teeth 32, the second rack of the engagement portion 44 is disengaged from the engagement 33 with the first gear.
The upper ends of the buckling teeth 43 are formed with an operation handle 45 to facilitate the operation of the buckling teeth 32 out of engagement with the latch teeth 32.
The upper end of the mounting chamber 3 forms a finger support stop 31. Correspondingly, the lower end of the mounting cavity 3 also forms a finger support stop. The fingers above and below the mounting cavity are supported when convenient for pushing.
The finger support stopper at the lower end of the installation cavity 3 is formed in a sleeve shape for inserting a finger therein. The finger support member 31b in the form of a loop can accommodate two fingers. This allows the syringe to be held stably by a single hand while the finger of the user is easily positioned to operate the handle 45.
When the injector needs to be subjected to preparation operations such as exhausting, the buckling teeth are buckled on the clamping teeth, and at the moment, the second rack of the meshing part is separated from the first gear, so that the injector is not different from a conventional injector in use.
When the anesthetic has been sucked into the syringe, after the needle has penetrated the point to be injected, the finger at the upper part of the mounting cavity performs a corresponding action, such as lifting or pressing (specifically, what action depends on the arrangement of the handle on the latch, and if the handle is lifted, the lifting action is performed, and if the handle structure of fig. 8 is adopted, the latch is separated from the latch by pressing), so that the latch is separated from the latch. Under the action of the restoring force of the compression spring, the sliding rod moves towards the first end of the needle cylinder, the meshing part starts to mesh with the first gear and drives the first gear to rotate anticlockwise (refer to figure 1), and the anticlockwise rotating first gear drives the first rack of the pintle to slide towards the second end of the needle cylinder, so that the pintle is extracted, and the back-extraction action is realized. When the syringe is injected again, the pintle moves towards the first end of the syringe, the first rack drives the first gear to rotate clockwise, the first gear drives the second rack to move towards the second end of the syringe, and therefore the buckling teeth move towards the clamping teeth; the third guide inclined plane of the buckling teeth is along the first guide inclined plane of the clamping teeth, so that the buckling teeth are buckled on the clamping teeth; in the process of downwards buckling the buckling teeth, the fourth guide inclined plane of the buckling teeth slides along the second guide inclined plane of the clamping teeth, so that the second rack is further pushed to move towards the second end direction of the needle cylinder, and finally complete disengagement of the engagement of the second rack and the first gear is achieved. If the second rack and the first gear cannot be completely separated, the elastic force of the back suction or the back suction stroke can be too large, and the back suction only serves to observe the back blood, and the back suction stroke is not required to be large.
Unless defined otherwise, all technical and/or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The materials, methods, and examples mentioned in this application are illustrative only and not intended to be limiting.
Although the present invention has been described in connection with specific embodiments thereof, those skilled in the art will appreciate that various substitutions, modifications and changes may be made without departing from the spirit of the invention.
Claims (2)
1. A local anesthetic syringe, which comprises a syringe and a pintle; the method is characterized in that:
the second end of the needle cylinder is provided with a gear mounting cavity; the gear installation cavity is formed into a flat tube shape, a first end of the gear installation cavity is fixed with a second end of the needle cylinder, and a second end of the gear installation cavity is an opening; the upper part of the first end of the gear installation cavity extends beyond the needle cylinder; the upper part of the first end of the gear installation cavity forms a guide pipe; the upper end of the first end of the guiding pipe is provided with a latch, the latch is upwards protruded, a first guiding inclined plane is formed on the first side of the latch, and a second guiding inclined plane is formed on the second side of the latch;
the second end of the pintle installed in the needle cylinder extends from the installation cavity to the outside; the upper side of the pintle is formed into a first rack;
a first gear and a second roller are arranged in the gear mounting cavity; the first gear is positioned on the upper side of the first rack and meshed with the teeth of the first rack; the second roller is positioned at the lower side of the pintle and forms a support under the pintle;
a back-pumping starting component is arranged in the gear installation cavity;
the back-drawing starting component comprises a linear sliding rod, and the second end of the sliding rod extends into the mounting cavity; the first end of the sliding rod extends to the outside through the guide tube;
the first end of the sliding rod is provided with a bent elastic rod, and the first end of the elastic rod is connected to the sliding rod; the second end of the elastic rod is provided with buckling teeth corresponding to the clamping teeth; the second side of the buckling teeth forms a third guiding inclined plane; a fourth guiding inclined plane is formed on the first side of the buckling teeth; the lower side of the second end of the sliding rod forms a meshing part protruding downwards; the engagement portion is formed as a second rack to engage with the first gear at an upper side of the first gear;
a compression spring is supported between the connecting part of the sliding rod and the elastic rod and the first end of the guide tube;
when the buckling teeth are meshed on the clamping teeth, the second rack is separated from the meshing with the first gear;
the upper ends of the buckling teeth form an operating handle;
the upper end of the mounting cavity forms a finger supporting baffle;
the lower end of the mounting cavity forms a finger supporting baffle;
the finger support block at the lower end of the mounting cavity is formed into a sleeve ring shape for inserting fingers therein.
2. The local anesthetic syringe of claim 1, wherein:
the annular finger support block at the lower end of the mounting cavity can accommodate two fingers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210223499.7A CN114602031B (en) | 2022-03-07 | 2022-03-07 | Injector for local anesthesia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210223499.7A CN114602031B (en) | 2022-03-07 | 2022-03-07 | Injector for local anesthesia |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114602031A CN114602031A (en) | 2022-06-10 |
| CN114602031B true CN114602031B (en) | 2024-01-26 |
Family
ID=81860200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210223499.7A Active CN114602031B (en) | 2022-03-07 | 2022-03-07 | Injector for local anesthesia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114602031B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5833668A (en) * | 1996-11-21 | 1998-11-10 | Aguilar; David G. | Hypodermic syringe |
| WO2013024933A1 (en) * | 2011-08-12 | 2013-02-21 | Seo Yong Sun | Syringe provided with a supplementary pressing portion for administering local anesthetics |
| CN203139333U (en) * | 2013-03-18 | 2013-08-21 | 吴卫平 | Electric syringe for anesthesia |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170258507A1 (en) * | 2008-04-02 | 2017-09-14 | Hugh Hetherington | Single hand injection control device with a self-adjusting position reference |
| US20130211374A1 (en) * | 2008-04-02 | 2013-08-15 | Hugh Hetherington | Injection Control Device for Proportional Injection, Extraction during the Syringe's Insertion, Retraction |
-
2022
- 2022-03-07 CN CN202210223499.7A patent/CN114602031B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5833668A (en) * | 1996-11-21 | 1998-11-10 | Aguilar; David G. | Hypodermic syringe |
| WO2013024933A1 (en) * | 2011-08-12 | 2013-02-21 | Seo Yong Sun | Syringe provided with a supplementary pressing portion for administering local anesthetics |
| CN203139333U (en) * | 2013-03-18 | 2013-08-21 | 吴卫平 | Electric syringe for anesthesia |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114602031A (en) | 2022-06-10 |
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