Dart injector
By setting up a rubber piston and a high-pressure chamber in the dart syringe and using high-pressure air to promote the injection of the medicine liquid, the injection instability problem caused by relying on mechanical springs in the prior art is solved, and the stability and controllability of the injection process are achieved.
Patent Information
- Application Number
- CN202421674254.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The existing anesthesia needles rely on mechanical springs during the injection process, and the elastic force and compression degree are not easy to grasp, resulting in instability in the injection.
A dart syringe that does not rely on mechanical springs is designed, and the injection of the drug liquid is driven by the use of high-pressure air by setting a rubber piston and a high-pressure chamber in the injection tube.
The stability and controllability of the injection process are achieved without additional springs or elastic components, and the structure is simplified, easy to operate and strong practicality.
Smart Images
Figure CN222968695U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of veterinary syringes, and particularly relates to a dart syringe. Background Art
[0002] In the daily care of animals, it is sometimes necessary to inject medications into animals, and anesthetic drugs are quite common. Especially for large-sized, irritable, and aggressive animals, veterinarians need to first use anesthetic darts to anesthetize and calm such animals before they can carry out subsequent work. In the existing anesthetic syringes, a spring is mostly used to push the liquid medicine into the animal's body during the injection process, and it is not easy to grasp the elastic force and the degree of compression. Therefore, we need a dart syringe that does not rely on a mechanical spring. Content of the Utility Model
[0003] Problem to be Solved: To provide a dart syringe that does not rely on a mechanical spring.
[0004] To achieve the above object, the utility model provides the following technical solution: A dart syringe includes an injection tube and a side-hole needle head connected to the injection tube. The side-hole needle head includes a needle seat and a needle tip. The needle tip is blocked, and there is a side hole at a certain distance from the needle tip. The side-hole sealing column can block the side hole. One end of the injection tube is the liquid medicine inlet and outlet, and the opposite end of the liquid medicine inlet and outlet is the air pressure port. A rubber piston is provided in the injection tube. The rubber piston is tightly connected to the push rod and can slide in the injection tube simultaneously. A pressure port sealing column is arranged inside the injection tube near the air pressure port. The radius of the pressure port sealing column is smaller than the inner diameter of the injection tube. A liquid medicine chamber for accommodating the liquid medicine is formed between the liquid medicine inlet and outlet and the rubber piston, and a high-pressure chamber for accommodating high-pressure air is formed between the push rod and the pressure port sealing column. The flight tail fin is sleeved outside the air pressure port.
[0005] Preferably, the side-hole needle head is connected to the outside of the liquid medicine inlet and outlet through the needle seat, and the connection method between the needle seat and the outside of the liquid medicine inlet and outlet is a Luer connector.
[0006] Preferably, the side-hole sealing column is a cylindrical rubber sealing column.
[0007] Preferably, the side-hole needle head is provided with an injection needle protective sleeve.
[0008] Preferably, one end of the rubber piston close to the liquid medicine inlet and outlet is a conical surface, and a cavity is opened at the opposite end of the conical surface. The push rod includes a first push rod end and a second push rod end. Between the first push rod end and the second push rod end is the middle part of the push rod. The first push rod end and the second push rod end are sleeved in the cavity.
[0009] Preferably, the cavity is provided with a card slot for clamping the first push rod end. The outer diameter of the first push rod end is larger than the outer diameter of the middle part of the push rod, and the outer diameter of the second push rod end is larger than the outer diameter of the first push rod end.
[0010] Preferably, a plurality of protrusions are provided around the side surface of the rubber piston, and the protrusions are in close fit with the inner wall of the injection tube.
[0011] Compared with the prior art, the present utility model provides an electronic parking brake system, which has the following beneficial effects: An injection tube is divided into a liquid medicine chamber and a high-pressure chamber by a rubber piston. The liquid medicine chamber stores liquid medicine, and the high-pressure chamber stores compressed air. An injection needle with side holes is installed at the liquid medicine end of the injection tube, and the side hole sealing column seals the side holes. At the moment when the needle tip pierces the animal skin, the side hole sealing column moves towards the needle base direction, and the compressed air in the high-pressure chamber pushes the liquid medicine into the animal body. The whole process does not require additional use of springs or elastic components, with a simplified structure, convenient operation, and strong practicability. Description of the Drawings
[0012] Figure 1 is a schematic structural diagram of the present utility model;
[0013] Figure 2 is a schematic diagram of the injection tube in the present utility model.
[0014] Figure 3 is a schematic diagram of the side hole needle in the present utility model.
[0015] Figure 4 is a schematic connection diagram of the rubber piston and the push rod in the present utility model.
[0016] Description of the reference numerals: 1. Injection tube; 11. Liquid medicine inlet and outlet; 12. Air pressurization port; 13. Rubber piston; 131. Conical surface; 132. Cavity; 133. Card slot; 134. Protrusion; 14. Push rod; 141. First end of the push rod; 142. Second end of the push rod; 143. Middle part of the push rod; 15. Liquid medicine chamber; 16. Pressurization port sealing column; 17. High-pressure chamber; 2. Side hole needle; 21. Needle base; 22. Needle tip; 23. Side hole; 24. Injection needle protective sleeve; 3. Side hole sealing column; 4. Flying tail. Detailed Embodiments
[0017] The following will describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model:
[0018] As shown in the figure, a dart syringe includes an injection tube 1 and a side-hole needle 2 connected to the injection tube 1. The side-hole needle 2 is sleeved in an injection needle protective sleeve 24. The side-hole needle 2 includes a needle base 21 and a needle tip 22. The needle tip 22 is blocked, and there is a side hole 23 at a certain distance from the needle tip 22. The connection method between the needle base 21 and the outside of the liquid medicine inlet and outlet 11 is a Luer connector. The liquid medicine can only flow out at the side hole 23 of the side-hole needle 2. The side-hole sealing column 3 blocks the side hole 23. The side-hole sealing column 3 is a cylindrical rubber sealing column or a rectangular rubber sealing column, which is not limited here. One end of the injection tube 1 is the liquid medicine inlet and outlet 11, and the opposite end of the liquid medicine inlet and outlet 11 is the air pressure port 12. A rubber piston 13 is provided in the injection tube 1. In order to make the rubber piston 13 slide more smoothly in the injection tube 1, a push rod 14 is provided at one end of the rubber piston 13 close to the air pressure port 12. The rubber piston 13 is tightly connected to the push rod 14 and slides in the injection tube 1 at the same time. A pressure port sealing column 16 is provided at a position inside the injection tube 1 close to the air pressure port 12. Since the radius of the pressure port sealing column 16 is smaller than the inner diameter of the injection tube 1, there is a gap between the outside of the pressure port sealing column 16 and the inner wall of the injection tube 1. A liquid medicine chamber 15 for accommodating the liquid medicine is formed between the liquid medicine inlet and outlet 11 and the rubber piston 13, and a high-pressure chamber 17 for accommodating high-pressure air is formed between the push rod 14 and the pressure port sealing column 16. A flight tail 4 is sleeved outside the air pressure port 12, and the flight tail 4 is conducive to the flight of the syringe.
[0019] The tight connection between the rubber piston 13 and the push rod 14 can be realized by the following method. One end of the rubber piston 13 close to the liquid medicine inlet and outlet 11 is a conical surface 131, and a cavity 132 is opened at the opposite end of the conical surface 131. The push rod 14 includes a push rod end one 141 and a push rod end two 142. Between the push rod end one 141 and the push rod end two 142 is the push rod middle part 143. The push rod end one 141 and the push rod end two 142 are sleeved in the cavity 132. A clamping groove 133 for clamping the push rod end one 141 is provided in the cavity 132. The outer diameter of the push rod end one 141 is larger than the outer diameter of the push rod middle part 143, and the outer diameter of the push rod end two 142 is larger than the outer diameter of the push rod end one 141. The compressed air in the high-pressure chamber 17 pushes the push rod 14 forward, and then the rubber piston 13 moves forward at the same time.
[0020] In order to better seal and connect between the liquid medicine chamber 15 and the high-pressure chamber 17, a plurality of protrusions 134 are provided around the side surface of the rubber piston 13. The protrusions 134 are in close fit with the inner wall of the injection tube 1, so as to achieve the purpose of isolating the liquid medicine chamber 15 and the high-pressure chamber 17 by the rubber piston 13. At the same time, the rubber piston 13 seals and slides in the injection tube 1.
[0021] The above embodiments are only some embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
Claims
1. A dart syringe, comprising an injection tube (1), a side hole needle (2) connected to the injection tube (1), the side hole needle (2) comprising a needle seat (21), a needle tip (22), the needle tip (22) being blocked and having a side hole (23) at a certain distance from the needle tip (22), a side hole sealing column (3) being able to block the side hole (23), characterized in that: One end of the injection tube (1) is a liquid medicine inlet and outlet (11), and the opposite end of the liquid medicine inlet and outlet (11) is an air pressurizing port (12). A rubber piston (13) is provided in the injection tube (1), and the rubber piston (13) and the push rod (14) are tightly connected and can slide in the injection tube (1) at the same time. A pressurizing port sealing column (16) is provided in the injection tube (1) near the air pressurizing port (12), and the radius of the pressurizing port sealing column (16) is smaller than the inner diameter of the injection tube (1). A liquid medicine chamber (15) for containing liquid medicine is formed between the liquid medicine inlet and outlet (11) and the rubber piston (13), and a high-pressure chamber (17) for containing high-pressure air is formed between the push rod (14) and the pressurizing port sealing column (16). The flight tail (4) is sleeved on the outside of the air pressurizing port (12).
2. A dart injector according to claim 1, characterized in that: The side hole needle (2) is connected to the outer side of the drug liquid inlet and outlet (11) through a needle seat (21), and the needle seat (21) and the outer side of the drug liquid inlet and outlet (11) are connected in a Luer connector.
3. A dart injector as claimed in claim 2, characterized in that: The side hole sealing column (3) is a cylindrical rubber sealing column.
4. A dart injector as claimed in claim 1, characterized in that: The side hole needle head (2) is provided with an injection needle protection cover (24).
5. A dart injector as claimed in claim 3, characterized in that: One end of the rubber piston (13) close to the liquid medicine inlet and outlet (11) is a conical surface (131), and one end opposite to the conical surface (131) is provided with a cavity (132). The push rod (14) comprises a push rod end 1 (141) and a push rod end 2 (142). A push rod middle portion (143) is provided between the push rod end 1 (141) and the push rod end 2 (142). The push rod end 1 (141) and the push rod end 2 (142) are sleeved in the cavity (132).
6. A dart injector as claimed in claim 5, characterized in that: The mold cavity (132) is provided with a clamping groove (133) for clamping the first push rod end (141), the outer diameter of the first push rod end (141) is larger than the outer diameter of the middle part (143) of the push rod, and the outer diameter of the second push rod end (142) is larger than the outer diameter of the first push rod end (141).
7. A dart injector according to claim 6, characterized in that: A plurality of protrusions (134) are arranged around the side of the rubber piston (13), and the protrusions (134) are tightly fitted to the inner wall of the injection tube (1).