Veterinary injection device
By designing a combination of rod, syringe, baffle and spring, injection of large animals can be performed outside the enclosure, solving the problem that existing devices require entry into the enclosure for operation, and improving the convenience and flexibility of injection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2026-04-07
AI Technical Summary
Existing veterinary injection devices are cumbersome to operate when injecting large animals in farms, requiring entry into the enclosure for the procedure.
A veterinary injection device was designed, comprising a rod, syringe, baffle plate, needle, and spring. The telescopic rod and baffle plate allow the operator to perform injections outside the enclosure. The baffle plate holds the animal against its skin, and the needle and syringe move within the animal's body to complete the injection.
Operators can inject large animals without entering the enclosure, improving the convenience and flexibility of the operation and simplifying the injection process.
Smart Images
Figure CN224085495U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of veterinary technology, specifically to veterinary injection devices. Background Technology
[0002] Veterinary injection refers to the use of veterinary injection devices to inject sterile solutions, emulsions, suspensions, and sterile powders prepared into liquid form before use into animals to treat or prevent diseases or supplement nutrition.
[0003] When administering vaccines and other medications to large animals such as cattle and pigs raised on farms, the large number of animals and their corresponding pens makes it cumbersome to use existing veterinary injection devices. This requires entering each pen to administer the injection, making the process quite inconvenient. Utility Model Content
[0004] In view of this, the purpose of this utility model is to provide a veterinary injection device to solve the problem of the inconvenience of injecting large animals such as cattle and pigs in farms using existing veterinary injection devices.
[0005] This utility model is achieved through the following technical solution:
[0006] A veterinary injection device includes a rod, a syringe, a baffle plate, a needle, and a spring. The piston shaft of the syringe is fixedly connected to the front end of the rod. A through hole is formed on the baffle plate. The needle plug of the needle is fixed to the syringe tip. The needle shaft of the needle is closed at the position corresponding to the needle tip. A liquid outlet is formed on the side wall of the needle shaft. The needle shaft is located in the through hole and cooperates with the through hole. The liquid outlet is located in the through hole. The rear end of the spring is fixedly connected to the syringe, and the front end is fixedly connected to the baffle plate.
[0007] Further specifying, the rod is a telescopic rod, and the telescopic rod is a structure that can extend and retract along its axial direction.
[0008] Further defined, the telescopic rod includes a tube body, an inner rod, and a bolt. The rear end of the inner rod is located inside the tube body, and the inner rod mates with the inner cavity of the tube body. A first screw hole is provided on the side wall of the tube body, and the screw-in end of the bolt is screwed into the screw hole and abuts against the inner rod. The piston shaft of the syringe is fixedly connected to the front end of the inner rod.
[0009] Further, it also includes a refill component for replenishing the medication in the syringe.
[0010] Further specifying, the fluid replenishment assembly includes a medicine container, a fluid replenishment tube, and a one-way valve. The medicine container has an air inlet at its upper end. One end of the fluid replenishment tube is connected to the inner cavity of the medicine container, and the other end is connected to the front end of the inner cavity of the syringe barrel. The one-way valve is disposed on the fluid replenishment tube and is used to allow the medicine to flow from the medicine container to the inner cavity of the syringe barrel.
[0011] Further specifying, the fluid replenishment assembly also includes a first baffle, a second baffle, and a first screw. The first baffle is fixed to the rear end of the syringe barrel and is located inside the inner cavity of the syringe barrel. A second screw hole is formed on the first baffle. The second baffle is located inside the syringe barrel and is fixed to the piston shaft of the syringe. The first screw is screwed into the second screw hole, and the front end of the first screw abuts against the second baffle.
[0012] Further specifying, the piston shaft of the syringe is fixedly connected to a second screw at its rear end, and the front end of the screw body is recessed inward to form a third screw hole, and the second screw is screwed into the third screw hole.
[0013] Furthermore, the replenishment tube is detachably connected to the front end of the syringe barrel cavity.
[0014] Further specified, the syringe barrel is fixedly connected to an inner tube at its front end, the inner cavity of the inner tube is connected to the inner cavity of the syringe, and the inner tube is provided with an external thread; the end of the replenishment tube near the syringe is fixedly connected to an outer tube, the inner cavity of the outer tube is connected to the inner cavity of the replenishment tube, the outer tube is provided with an internal thread, and the inner tube is screwed into the outer tube.
[0015] Further specified, a needle tube is fixedly provided at the front end of the blocking plate, the front end of the needle shaft of the needle is located inside the needle tube, the needle shaft of the needle cooperates with the inner cavity of the needle tube, and the needle tip of the needle tube is located in front of the needle tip of the needle.
[0016] The beneficial effects of this utility model are as follows:
[0017] When using the veterinary injection device described in this solution to inject medication into large animals such as cattle and pigs in a farm, the operator stands outside the enclosure, holds the rod, and aims the syringe at the injection site on the animal. The rod is then moved forward to insert the needle into the injection site. During this process, the blocking plate is held against the animal's skin and cannot move forward. The needle moves forward relative to the blocking plate, and the outlet moves out of the blocking plate and into the animal's body, compressing the spring. The operator then continues to push the rod, which pushes the piston shaft forward relative to the syringe barrel. The piston shaft then moves the syringe piston forward relative to the syringe barrel, pushing the medication into the animal's body. After the medication is injected into the body of large animals such as cattle and pigs, the operator moves the rod backward. Under the elastic force of the spring, the baffle remains against the skin of the animal. The syringe and needle move backward. After the rod has moved a certain distance backward, the outlet re-enters the through hole and is re-sealed by the hole wall. Continuing to move the rod backward allows the needle to completely detach from the animal's body, thus completing the injection. When using the veterinary injection device described in this invention to inject large animals such as cattle and pigs in a farm, the operator can inject the animals without entering the pen, making it more convenient.
[0018] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description
[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0020] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;
[0021] Figure 3 This is a cross-sectional structural diagram of the present invention;
[0022] Figure 4 This utility model Figure 3Enlarged view of point B in the middle;
[0023] Figure 5 This utility model Figure 4 Enlarged view at point D
[0024] Figure 6 This utility model Figure 4 Enlarged view at point E in the middle;
[0025] Figure 7 This utility model Figure 3 Enlarged view of point C in the middle.
[0026] In the diagram: 1. Rod; 11. Inner rod; 12. Tube; 13. Bolt; 2. Syringe; 21. First screw; 22. Piston shaft; 23. Piston; 24. Empty cylinder; 3. Needle; 31. Baffle plate; 32. Spring; 33. Discharge port; 41. Replenishment tube; 42. Medicine container; 51. First baffle; 52. Second baffle; 53. Second screw; 61. Inner tube; 62. Outer tube; 63. Check valve; 7. Needle tube. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0030] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0031] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.
[0032] Please see Figure 1-7 This utility model provides a technical solution: a veterinary injection device, including a rod 1, a syringe 2, a baffle plate 31, a needle 3, and a spring 32. The piston shaft 22 of the syringe 2 is fixedly connected to the front end of the rod 1. A through hole is formed on the baffle plate 31. The needle plug of the needle 3 is fixedly mounted on the nipple of the syringe 2. The needle shaft of the needle 3 is closed at the position corresponding to the needle tip. A liquid outlet 33 is formed on the side wall of the needle shaft. The needle shaft is located in the through hole and cooperates with the through hole. The liquid outlet 33 is located in the through hole. The rear end of the spring 32 is fixedly connected to the syringe 2, and the front end is fixedly connected to the baffle plate 31.
[0033] When the veterinary injection device of this utility model is in its initial state, the piston 23 of the syringe 2 abuts against the front end face of the inner cavity of the syringe 2, the liquid outlet 33 is located in the through hole, and the hole wall of the through hole blocks the liquid outlet 33.
[0034] When using the veterinary injection device described in this utility model to draw liquid medicine from the medicine bottle, the operator inserts the tip of the needle 3 and the front end of the shaft of the needle 3 into the mouth of the veterinary injection bottle. The baffle plate 31 is then pressed against the mouth of the veterinary injection bottle, and the rod 1 is pushed towards the inside of the bottle. The syringe 2 and needle 3 move forward relative to the baffle plate 31, and the outlet 33 moves out of the baffle plate 31 and into the veterinary injection bottle, compressing the spring 32. Then, the operator holds the empty cylinder 24 of the syringe 2 in place and pulls the rod 1 away from the veterinary drug vial. The rod 1 pulls the piston shaft 22 backward, which in turn moves the piston 23 of the syringe 2 backward. The distance between the front end of the empty cylinder 24 and the piston 23 of the syringe 2 increases, and the volume of the portion of the inner cavity of the empty cylinder 24 located in front of the piston 23 increases, creating a negative pressure. The liquid medicine in the veterinary drug vial is drawn into the syringe 2 through the outlet 33, thus completing the aspiration of the liquid medicine. After the liquid medicine is aspirated, the operator moves the rod 1 backward to pull the needle 3 out of the mouth of the veterinary drug vial. The spring 32 rebounds, and the spring 32 moves the blocking plate 31 forward, so that the blocking plate 31 blocks the outlet 33.
[0035] When using the veterinary injection device described in this solution to inject medication into large animals such as cattle and pigs in a farm, the operator stands outside the enclosure, holds the rod 1, and aims the syringe 2 at the injection site on the animal. The rod 1 is then moved forward to insert the needle 3 into the injection site. During the insertion of the needle 3, the baffle plate 31 is unable to move forward because it is pressed against the animal's skin. The needle 3 moves forward relative to the baffle plate 31, and the outlet 33 moves out of the baffle plate 31 and into the animal's body, compressing the spring 32. Then, the operator continues to push the rod 1, which pushes the piston shaft 22 forward relative to the empty cylinder 24 of the syringe 2. The piston shaft 22 drives the piston 23 of the syringe 2 to move forward relative to the empty cylinder 24 of the syringe 2, and the piston 23 of the syringe 2 pushes the liquid into the body of large animals such as cattle and pigs. After the liquid is pushed into the body of large animals such as cattle and pigs, the operator moves the rod 1 backward. Under the elastic force of the spring 32, the baffle remains against the skin of large animals such as cattle and pigs. The syringe 2 and needle 3 move backward. After the rod 1 moves backward a certain distance, the outlet 33 re-enters the through hole and is re-sealed by the hole wall. Then, the operator continues to move the rod 1 backward, which allows the needle 3 to completely detach from the body of large animals such as cattle and pigs. At this point, the injection into the large animals is completed. When using the veterinary injection device described in this utility model to inject large animals such as cattle and pigs in a farm, the operator can inject the large animals in the pen without entering the pen, making it more convenient to inject large animals such as cattle and pigs in a farm.
[0036] In this embodiment, the rod 1 is a telescopic rod, which is a structure that can extend and retract along its axial direction.
[0037] Before administering medication to large animals such as cattle and pigs in a farm using the veterinary injection device described in this invention, the operator can flexibly adjust the telescopic rod to a suitable length based on the animal's position within the pen. This improves the flexibility of using the veterinary injection device described in this invention.
[0038] In this embodiment, the telescopic rod includes a tube body 12, an inner rod 11, and a bolt 13. The rear end of the inner rod 11 is located inside the tube body 12, and the inner rod 11 cooperates with the inner cavity of the tube body 12. A first screw hole is provided on the side wall of the tube body 12, and the screw-in end of the bolt 13 is screwed into the first screw hole and abuts against the inner rod 11. The piston shaft 22 of the syringe 2 is fixed to the front end of the inner rod 11.
[0039] When the telescopic rod is in its initial state, the bolt 13 is screwed into the first screw hole, and the screw-in end of the bolt 13 abuts against the inner rod 11. At this time, the inner rod 11 is fixed inside the tube body 12.
[0040] Rotating the bolt 13 within the first screw hole disengages the screw-in end of the bolt 13 from the inner rod 11. At this point, the inner rod 11 can slide within the inner cavity of the tube body 12 to adjust the length of the telescopic rod. With this structure, the telescopic rod is capable of extending and retracting along its axial direction.
[0041] In this embodiment, the veterinary injection device of the present invention further includes a fluid replenishment component, which is used to replenish the drug solution in the syringe 2.
[0042] After injecting the drug solution into large animals such as cattle and pigs in a farm using the veterinary injection device described in this utility model, the drug solution in the empty cylinder 24 of the syringe 2 can be replenished through the replenishment component, so as to facilitate the injection of the drug solution into the next large animal such as cattle or pigs.
[0043] In this embodiment, the fluid replenishment assembly includes a medicine tank 42, a replenishment tube 41, and a one-way valve 63. The medicine tank 42 has an air inlet at its upper end. One end of the replenishment tube 41 is connected to the inner cavity of the medicine tank 42, and the other end is connected to the front end of the inner cavity of the syringe 2 empty cylinder 24. The one-way valve 63 is disposed on the replenishment tube 41. The one-way valve 63 is used to allow the medicine to flow from the medicine tank 42 to the inner cavity of the syringe 2 empty cylinder 24, that is, the medicine in the inner cavity of the syringe 2 empty cylinder 24 cannot flow back into the medicine tank 42.
[0044] After the needle 3 is completely removed from the body of a large animal such as a cow or pig, before injecting the next large animal, the operator holds the empty cylinder 24 of the syringe 2 in place and pulls the rod 1 backward. The rod 1 pulls the piston shaft 22 backward, which in turn moves the piston 23 of the syringe 2 backward. This increases the distance between the front end of the empty cylinder 24 and the piston 23 of the syringe 2, increasing the volume of the portion of the empty cylinder 24 located in front of the piston 23 and creating a negative pressure. The medication in the medication container 42 is then drawn into the syringe 2 through the replenishment tube 41. With this structure, the replenishment assembly can replenish the medication in the syringe 2. This eliminates the need to re-insert the needle 3 into the veterinary drug vial, making replenishment of the medication in the syringe 2 more convenient.
[0045] In this embodiment, the fluid replenishment assembly further includes a first baffle 51, a second baffle 52, and a first screw 21. The first baffle 51 is fixed to the rear end of the syringe 2 empty cylinder 24 and is located inside the syringe 2 empty cylinder 24. A second screw hole is formed on the first baffle 51. The second baffle 52 is located inside the syringe 2 empty cylinder 24 and is fixed to the piston shaft 22 of the syringe 2. The first screw 21 is screwed into the second screw hole, and the front end of the first screw 21 abuts against the second baffle 52.
[0046] In the initial state, the front end of the piston 23 of the syringe 2 abuts against the front end of the inner cavity of the empty cylinder 24. When using the veterinary injection device described in this solution to draw up the liquid medicine, the piston shaft 22 drives the second baffle 52 to move backward inside the empty cylinder 24 of the syringe 2 until the second baffle 52 abuts against the front end of the first screw 21. At this point, the piston shaft 22 can no longer drive the second baffle 52 to move backward inside the empty cylinder 24 of the syringe 2, and the piston 23 of the syringe 2 can no longer move backward inside the empty cylinder 24, so the syringe 2 can no longer draw up the liquid medicine.
[0047] When replenishing the medicine in the empty cylinder 24 of the syringe 2, the piston 23 and piston shaft 22 of the syringe 2 move backward relative to the empty cylinder 24 of the syringe 2. The piston shaft 22 of the syringe 2 drives the second baffle 52 to move backward in the empty cylinder 24 of the syringe 2 until the second baffle 52 abuts against the front end of the first screw 21. At this point, the piston 23 and piston shaft 22 of the syringe 2 can no longer move backward in the empty cylinder 24 of the syringe 2, and the syringe 2 can no longer draw medicine.
[0048] Before the veterinary injection device described in this solution draws in the liquid medicine and before replenishing the liquid medicine in the empty cylinder 24 of the syringe 2, rotating the first screw 21 in the second screw hole can adjust the distance between the front end of the first screw 21 and the front end of the inner cavity of the empty cylinder 24. This can change the maximum distance that the piston 23 can move backward relative to the front end of the inner cavity of the syringe 2, thereby adjusting the maximum amount of liquid medicine that can be drawn into the empty cylinder 24 of the syringe 2.
[0049] In this embodiment, a second screw 53 is fixedly connected to the rear end of the piston shaft 22 of the syringe 2. A third screw hole is formed by an inward recess at the front end of the rod body 1, and the second screw 53 is screwed into the third screw hole. By unscrewing the second screw 53 from the third screw hole, the piston shaft 22 of the syringe 2 can be detached from the rod body 1, and the syringe 2 can be disassembled from the rod body 1. After the syringe 2 is disassembled from the rod body 1, the syringe 2 and the rod body 1 can be stored separately.
[0050] In this embodiment, the refill tube 41 is detachably connected to the front end of the inner cavity of the syringe 2 empty cylinder 24. The refill tube 41 can be detached from the end of the inner cavity of the syringe 2 empty cylinder 24 near the needle 3. After the refill tube 41 is detached from the syringe 2, the combined structure of the refill tube 41 and the medicine container 42 can be stored separately from the syringe 2.
[0051] In this embodiment, an inner tube 61 is fixedly connected to the front end of the syringe 2 empty cylinder 24. The inner cavity of the inner tube 61 communicates with the inner cavity of the syringe 2, and the inner tube 61 is provided with an external thread. An outer tube 62 is fixedly connected to one end of the replenishment tube 41 near the syringe 2. The inner cavity of the outer tube 62 communicates with the inner cavity of the replenishment tube 41, and the outer tube 62 is provided with an internal thread. The inner tube 61 is screwed into the outer tube 62.
[0052] In the initial state, the inner tube 61 is screwed into the outer tube 62. At this time, the replenishment tube 41 is fixedly connected to the front end of the inner cavity of the syringe 2 empty cylinder 24. When it is necessary to remove the replenishment tube 41 from the inner tube 61, rotate the outer tube 62 to disengage it from the inner tube 61. At this time, the replenishment tube 41 can be detached from the front end of the inner cavity of the syringe 2 empty cylinder 24. With this structure, the replenishment tube 41 can be detachably and fixedly connected to the front end of the inner cavity of the syringe 2 empty cylinder 24.
[0053] In this embodiment, a needle tube 7 is fixedly provided at the front end of the blocking plate 31, the front end of the needle shaft of the needle tip 3 is located inside the needle tube 7, the needle shaft of the needle tip 3 cooperates with the inner cavity of the needle tube 7, and the needle tip of the needle tube 7 is located in front of the needle tip of the needle tip 3.
[0054] When the veterinary injection device of this utility model is in its initial state, the piston 23 of the syringe 2 abuts against the front end face of the inner cavity of the syringe 2, the liquid outlet 33 is located in the through hole, the hole wall of the through hole blocks the liquid outlet 33, the front end of the needle shaft of the needle 3 is located in the needle tube 7, and the needle tip of the needle tube 7 is located in front of the needle tip of the needle 3.
[0055] When using the veterinary injection device described in this utility model to draw liquid medicine from a vial, the operator inserts the needle tube 7 into the mouth of the veterinary injection vial, so that the baffle plate 31 abuts against the mouth of the veterinary injection vial. Then, the operator pushes the rod 1 towards the inside of the veterinary injection vial, and the syringe 2 and needle 3 move forward relative to the baffle plate 31. The outlet 33 moves out of the needle tube 7 and into the veterinary injection vial, and the spring 32 is compressed. Then, the operator fixes the empty cylinder 24 of the syringe 2 by hand and pulls the rod 1 away from the veterinary injection vial. The rod 1 pulls the piston shaft 22 to move backward, and the piston shaft 22 drives the piston 23 of the syringe 2 to move backward. The distance between the front end of the empty cylinder 24 and the piston 23 of the syringe 2 increases, and the volume of the part of the inner cavity of the empty cylinder 24 located in front of the piston 23 increases, forming a negative pressure. The liquid medicine in the veterinary injection vial is drawn into the syringe 2 through the outlet 33, and the drawing of the liquid medicine is completed. After the liquid medicine is drawn up, the operator moves the rod 1 backward to pull the needle 3 out of the mouth of the veterinary injection bottle. The spring 32 rebounds and drives the blocking plate 31 forward so that the blocking plate 31 blocks the liquid outlet 33.
[0056] When the operator aims the syringe 2 at the injection site on a large animal such as a cow or pig and moves the rod 1 forward, the needle 7 will first pierce the injection site. During the insertion of the needle 7 into the animal's body, the spring 32 is compressed, causing the needle 3 to move forward a certain distance relative to the needle 7, and the outlet 33 enters the needle 7. After the needle 7 is fully inserted into the animal's body, the baffle 31 presses against the animal's skin, preventing further forward movement. While the baffle 31 is pressing against the animal's skin and the rod 1 continues to move forward, the needle 3 continues to move forward relative to the needle 7, the spring 32 continues to be compressed, and the outlet 33 moves forward out of the needle 7. As the rod 1 continues to move forward, it pushes the piston shaft 22 forward relative to the empty cylinder 24 of the syringe 2. The piston shaft 22 then drives the piston 23 of the syringe 2 forward relative to the empty cylinder 24, propelling the medication into the body of large animals such as cattle and pigs. Before the outlet 33 moves forward from the needle tube 7, it is blocked by the tube wall, preventing the medication from being discharged from the syringe 2. Only after the outlet 33 moves forward from the needle tube 7 can the medication be discharged from the outlet 33 into the body of large animals such as cattle and pigs, allowing for deeper injection into their bodies.
[0057] After the liquid medicine is injected into the body of large animals such as cattle and pigs, the operator moves the rod 1 backward. Under the elastic force of the spring 32, the baffle remains against the skin of the large animals such as cattle and pigs. The syringe 2 and needle 3 move backward. After the rod 1 moves backward a certain distance, the outlet 33 re-enters the through hole and is blocked again by the hole wall. Then, the rod 1 is moved backward again, which allows the needle 3 and needle tube 7 to completely detach from the body of the large animals such as cattle and pigs. At this time, the injection of large animals such as cattle and pigs is completed.
[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A veterinary injection device, characterized in that: The syringe includes a rod (1), a syringe (2), a baffle plate (31), a needle (3), and a spring (32). The piston shaft (22) of the syringe (2) is fixedly connected to the front end of the rod (1). A through hole is formed on the baffle plate (31). The needle plug of the needle (3) is fixed to the nipple of the syringe (2). The needle shaft of the needle (3) is closed at the position corresponding to the needle tip. An outlet (33) is formed on the side wall of the needle shaft. The needle shaft is located in the through hole and cooperates with the through hole. The outlet (33) is located in the through hole. The rear end of the spring (32) is fixedly connected to the syringe (2), and the front end is fixedly connected to the baffle plate (31).
2. The veterinary injection device according to claim 1, characterized in that: The rod (1) is a telescopic rod, which is a structure that can extend and retract along its axial direction.
3. The veterinary injection device according to claim 2, characterized in that: The telescopic rod includes a tube body (12), an inner rod (11), and a bolt (13). The rear end of the inner rod (11) is located inside the tube body (12). The inner rod (11) is fitted into the inner cavity of the tube body (12). A first screw hole is provided on the side wall of the tube body (12). The screw-in end of the bolt (13) is screwed into the screw hole and abuts against the inner rod (11). The piston shaft (22) of the syringe (2) is fixed to the front end of the inner rod (11).
4. The veterinary injection device according to claim 1, characterized in that: It also includes a refill assembly for replenishing the medication in the syringe (2).
5. The veterinary injection device according to claim 4, characterized in that: The fluid replenishment assembly includes a liquid tank (42), a fluid replenishment tube (41), and a one-way valve (63). An air inlet is formed at the upper end of the liquid tank (42). One end of the fluid replenishment tube (41) is connected to the inner cavity of the liquid tank (42), and the other end is connected to the front end of the inner cavity of the empty cylinder (24) of the syringe (2). The one-way valve (63) is installed on the fluid replenishment tube (41) and is used to allow the liquid to flow from the liquid tank (42) to the inner cavity of the empty cylinder (24) of the syringe (2).
6. The veterinary injection device according to claim 5, characterized in that: The fluid replenishment assembly also includes a first baffle (51), a second baffle (52), and a first screw (21). The first baffle (51) is fixed to the rear end of the syringe (2) cylinder (24). The first baffle (51) is located inside the syringe (2) cylinder (24). A second screw hole is formed on the first baffle (51). The second baffle (52) is located inside the syringe (2) cylinder (24). The second baffle (52) is fixed to the piston shaft (22) of the syringe (2). The first screw (21) is screwed into the second screw hole. The front end of the first screw (21) abuts against the second baffle (52).
7. The veterinary injection device according to claim 1, characterized in that: The piston shaft (22) of the syringe (2) is fixedly connected to the rear end of a second screw (53), and the front end of the rod (1) is recessed inward to form a third screw hole, and the second screw (53) is screwed into the third screw hole.
8. The veterinary injection device according to claim 5, characterized in that: The replenishment tube (41) is detachably connected to the front end of the inner cavity of the syringe (2) empty barrel (24).
9. The veterinary injection device according to claim 8, characterized in that: The syringe (2) has an inner tube (61) fixedly connected to the front end of the empty barrel (24). The inner cavity of the inner tube (61) is connected to the inner cavity of the syringe (2). The inner tube (61) is provided with an external thread. The end of the replenishment tube (41) near the syringe (2) is fixedly connected to an outer tube (62). The inner cavity of the outer tube (62) is connected to the inner cavity of the replenishment tube (41). The outer tube (62) is provided with an internal thread. The inner tube (61) is screwed into the outer tube (62).
10. The veterinary injection device according to claim 1, characterized in that: The front end of the baffle plate (31) is fixedly provided with a needle tube (7), the front end of the needle shaft of the needle (3) is located inside the needle tube (7), the needle shaft of the needle (3) cooperates with the inner cavity of the needle tube (7), and the needle tip of the needle tube (7) is located in front of the needle tip of the needle (3).