Syringe handle, veterinary electric syringe and continuous injection method

Abstract

The invention relates to an injector handle, a veterinary electric injector and a continuous injection method. The syringe handle comprises a holding straight pipe, a switch base, a communicating piece and a disposable needle. The overall shape of the syringe handle is like a dagger, and puncture force application is facilitated; fingers can be put on the button switch in the puncture process; when the syringe handle is subjected to resistance of livestock skin during puncturing, the button switch can be pressed down in time, so that the liquid medicine is started to be conveyed; the veterinary electric injector further comprises a front shell part, a rear shell part, a hose and a first connecting screw. The electric injector for livestock can realize continuous and accurate liquid medicine injection, and is suitable for large-scale popularization in farms; the continuous injection method is easy to operate, puncture and liquid medicine injection are completed at a time, and the injection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the technical field of medical injection devices, and in particular to a syringe handle, a veterinary electric syringe, and a continuous injection method. Background Technology

[0002] Disease prevention in livestock farms is a crucial link in ensuring animal health, protecting public health and safety, maintaining the ecological environment, and promoting the sustainable development of animal husbandry. Disease prevention measures in livestock farms include vaccination, disinfection and environmental sanitation, animal health management, and prevention and control of key diseases. Vaccination and prevention and control of key diseases both require individual injections of each animal. The injection frequency is high, and the total amount of medication injected is large. Therefore, livestock farms are equipped with specialized veterinary syringes; these syringes need to meet the requirements of continuous injection and easy portability. The patented multifunctional veterinary continuous injector with authorization announcement number CN2533877Y is a veterinary continuous injector that meets the above requirements. This multifunctional veterinary continuous injector adjusts the dosage of liquid medication injected per injection by changing the extension and retraction limit position of the piston. Each time the operator pulls the lever, one injection is completed. However, the multi-functional veterinary continuous injector is pistol-shaped, and in actual operation, the needle must first penetrate the animal's skin before the lever is turned. This pistol-shaped multi-functional veterinary continuous injector is not conducive to puncture and force, making it very difficult to insert the needle into the animal's skin, and the animal is unlikely to cooperate well with the injection. As soon as the needle enters the animal's body, before the operator can turn the lever, the animal may violently resist. Therefore, this multi-functional veterinary continuous injector is not very convenient to operate. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems and provide a syringe handle, a veterinary electric syringe, and a continuous injection method.

[0004] The technical solution of this invention is as follows: A syringe handle includes a holding tube, a switch base, a connecting member, and a disposable needle; the switch base is located on the outer side of the front end of the holding tube and includes symmetrically arranged fins and a push-button switch; the overall shape of the syringe handle resembles a dagger, which is beneficial for applying puncture force; the push-button switch is located on the fins; the power supply wire of the push-button switch passes through the holding tube; during puncture, a finger can be placed on the push-button switch; when the syringe handle encounters resistance from the animal's skin during puncture, the push-button switch can be pressed in time, thereby initiating the delivery of liquid medication; the connecting member is located inside the front end of the holding tube; the connecting member has a connecting cavity inside; the front end of the connecting member has a needle tube connector that is detachably connected to the disposable needle; the rear end of the connecting member has a hose connector; the needle tube connector and the hose connector are connected through the connecting cavity; the liquid medication is delivered to the disposable needle through the hose connector and the connecting cavity.

[0005] Preferably, the front end of the needle connector is provided with an annular groove that matches the disposable needle, so as to realize the detachable installation of the disposable needle and facilitate the replacement of the disposable needle.

[0006] Preferably, the connecting element further includes a retaining ring; the outer wall of the hose connector head is provided with a step; the inner wall of the front end of the holding straight tube is provided with a step groove that matches the step; the inner wall of the retaining ring is threadedly connected to the outer wall of the front end of the holding straight tube; the front end of the retaining ring extends inward from the inner protrusion corresponding to the step; the inner protrusion cooperates with the step groove to limit the step, thereby realizing the connection between the hose connector and the holding straight tube; the rear end of the needle connector is threadedly connected to the front end of the hose connector, realizing the connection between the needle connector and the holding straight tube.

[0007] Preferably, the fins are tilted backward, which is beneficial for applying puncture force with the syringe handle.

[0008] A veterinary electric syringe including the aforementioned syringe handle further includes a front shell component, a rear shell component, a tubing, and a connecting screw; the front shell component includes a front shell; the rear shell component includes a rear shell, a cartridge, a battery, an injection mechanism, a motor controller, and a drug delivery tube; the cartridge, battery, injection mechanism, and motor controller are all installed inside the rear shell; the rear shell integrates the cartridge, battery, injection mechanism, motor controller, and drug delivery tube together; the front shell and rear shell are interlocked and connected by the connecting screw to form an integral outer shell to protect the cartridge, battery, injection mechanism, motor controller, and drug delivery tube; The injection mechanism includes a vertically oriented syringe, a forward check valve, a reverse check valve, a three-way valve, a piston, a through-type lead screw motor, a lead screw, and a guide tube. The syringe, through-type lead screw motor, and guide tube are vertically connected in sequence. The top of the syringe is connected to the first connector of the three-way valve. The forward check valve is installed forward on the second connector of the three-way valve. The reverse check valve is installed reverse on the third connector of the three-way valve. The piston is vertically and slidingly fitted inside the syringe. The upper end of the lead screw is connected to the lower end of the piston. The middle part of the lead screw is fitted with the through-type lead screw motor. The lower end of the lead screw is provided with a horizontal sliding shaft. The guide tube is provided with a vertical sliding shaft. The system features a sliding groove with a shaft fit; the battery is electrically connected to the through-type lead screw motor via a motor controller; a drug outlet is located at the bottom of the syringe; the drug outlet is connected to a forward one-way valve via a drug inlet tube; a reverse one-way valve is connected to a hose connector via a hose; the through-type lead screw motor acts on the piston through the lead screw, causing the piston to move axially within the syringe barrel; the sliding groove, in cooperation with the sliding shaft, prevents the lead screw from rotating, ensuring that the product of the through-type lead screw motor's speed and the lead screw's ... The purpose of controlling the axial movement of the piston is as follows: Upward movement of the piston increases the pressure inside the syringe, allowing air or liquid medication to be delivered to the disposable needle via a reverse check valve and tubing; precise control of the upward axial movement of the piston allows for control of the single injection volume; downward movement of the piston reduces the pressure inside the syringe, allowing liquid medication in the cartridge to be drawn into the syringe via a drug delivery tube and a forward check valve; the upper and lower parts of the rear shell have upper and lower holes for securing the upper and lower ends of the strap, increasing the portability of the veterinary electric syringe and reducing injection difficulty.

[0009] Preferably, the front housing component also includes a control panel; the control panel can adjust the output of the through-type lead screw motor, thereby adjusting the dosage of liquid drug in a single injection; the front housing has a through-hole for mounting the control panel; the control panel is nested in the control panel mounting hole for easy operation and adjustment of the control panel; the control panel is electrically connected to the motor controller.

[0010] Preferably, the inner wall of the rear shell is provided with a medicine tank mounting frame that matches the medicine tank; the medicine tank is fitted into the medicine tank mounting frame to fix the medicine tank; the inner wall of the front shell is provided with a liquid level observation vertical hole and a horizontal support plate corresponding to the medicine tank mounting frame; the liquid level observation vertical hole penetrates the inner wall of the front shell; the liquid level observation vertical hole can be used to know the amount of liquid medicine in the medicine tank; the horizontal support plate abuts against the medicine tank to increase the installation stability of the medicine tank.

[0011] Preferably, the top of the medicine compartment is provided with a medicine inlet to replenish the medicine compartment with liquid medicine; the pressure port is equipped with a cover to seal the medicine inlet, prevent foreign objects from entering the medicine compartment and contaminating the liquid medicine, and also prevent the liquid medicine from splashing out and causing waste; a duckbill valve is embedded in the center of the cover to balance the air pressure inside and outside the medicine compartment and ensure the continuous delivery of liquid medicine.

[0012] Preferably, the bottom of the syringe has an outwardly protruding edge; the injection mechanism also includes a retaining ring, a motor connecting plate A, a motor connecting plate B, a bolt connector, and a countersunk screw; the top surface of the motor connecting plate A has a countersunk groove corresponding to the outwardly protruding edge and a lead screw through hole A corresponding to the lead screw; the countersunk groove is evenly distributed with motor mounting screw holes corresponding to the through-type lead screw motor; the motor connecting plate A has a connecting hole A corresponding to the bolt connector; the retaining ring is fitted outside the syringe, above the outwardly protruding edge; the lower end of the retaining ring abuts against the upper end of the outwardly protruding edge; the upper end of the retaining ring abuts against the bolt connector; the motor connecting plate A enables a detachable connection between the syringe and the through-type lead screw motor; the upper end of the guide tube has a connecting flange; the upper end of the motor connecting plate B has a countersunk hole; the countersunk screw passes through the countersunk hole and connects to the connecting flange; the motor connecting plate B also has a motor connecting hole corresponding to the through-type lead screw motor and a lead screw through hole B corresponding to the lead screw; the motor connecting plate B enables a detachable connection between the guide tube and the through-type lead screw motor.

[0013] Furthermore, the sliding groove passes through the connecting flange; the edge of the lead screw through hole is provided with a radial groove that matches the sliding groove; the sliding shaft can pass into the radial groove, making the structure of the entire injection mechanism more compact.

[0014] Preferably, the veterinary electric injector also includes a serpentine tube; the serpentine tube is fitted over the flexible tube, with one end connected to the lower end of the gripping straight tube and the other end connected to the top of the overall housing; the serpentine tube protects the flexible tube.

[0015] A continuous injection method for the above-mentioned veterinary electric injector includes the following steps: ① Add liquid medicine to the medicine tank ② Administering liquid medication into the syringe Press the corresponding button switch on the syringe handle; the motor controller controls the through-type lead screw motor to output reverse torque, driving the piston to move down; the air pressure inside the syringe decreases, and the liquid drug in the drug chamber enters the syringe through the drug inlet tube and the forward one-way valve under the action of atmospheric pressure; because of the presence of the reverse one-way valve, the liquid or air in the tubing will not enter the syringe. ③Purge the air from the hose Press the corresponding button switch on the syringe handle; the motor controller controls the through-type lead screw motor to output positive torque, driving the piston upward; the positive torque output by the through-type lead screw motor controls the lead screw to rotate at a fixed angle; because of the presence of the positive one-way valve, the liquid drug cannot enter the drug delivery tube, but can only be delivered to the disposable needle through the reverse one-way valve; the axial upward movement of the piston is precisely controlled, which can be converted into control of the single injection volume; the amount of liquid drug delivered each time is the dose of the single injection; Press the corresponding button switch on the syringe handle repeatedly until the disposable needle can expel the liquid medication; ④ Single injection Hold the straight tube with your hand, wedge the fin plate in the web between your thumb and forefinger, and place one finger on the button that drives the through-type lead screw motor to output positive torque; Aim at the injection site and insert the disposable needle into it; when the disposable needle is inserted into the animal's skin, the syringe handle will experience forward resistance; due to inertia, the finger will press the button; the motor controller controls the through-type lead screw motor to output positive torque, driving the piston upward; the positive torque output by the through-type lead screw motor controls the lead screw to rotate at a fixed angle; the liquid drug is delivered to the disposable needle through the reverse one-way valve; ⑤ Continuous injection Repeat step ④ until the liquid medication in the syringe is completely used.

[0016] The beneficial effects of the present invention are as follows: The syringe handle of the present invention has the following advantages: (1) The syringe handle of the present invention is shaped like a dagger, which is conducive to puncture and force application; during the puncture process, the fingers can be placed on the button switch; when the syringe handle is punctured and encounters resistance from the animal's skin, the button switch can be pressed in time to start the delivery of liquid drugs. (2) The syringe handle fins of the present invention are tilted backward, which is beneficial to the puncture force of the syringe handle.

[0017] The veterinary electric injector of the present invention has the following advantages: (1) The through-type screw motor of the present invention acts on the piston through the screw, so that the piston moves axially in the syringe barrel; the sliding groove cooperates with the sliding shaft to block the screw from rotating, so as to ensure that the product of the speed of the through-type screw motor and the lead of the screw is the speed of the piston moving axially, so as to achieve the purpose of accurately controlling the axial movement of the piston; the upward movement of the piston will increase the pressure in the syringe barrel, so that the air or liquid drug in the syringe barrel is delivered to the disposable needle through the reverse one-way valve and the hose; the axial upward movement of the piston is accurately controlled, which can be converted into the control of the single injection volume; the downward movement of the piston will reduce the pressure in the syringe barrel, so that the liquid drug in the drug chamber is drawn into the syringe barrel through the drug inlet tube and the forward one-way valve; (2) The sliding groove of the present invention is connected to the flange; the edge of the lead screw through hole is provided with a radial groove that matches the sliding groove; the sliding shaft can be inserted into the radial groove, making the structure of the entire injection mechanism more compact.

[0018] This continuous injection method is simple to operate, allowing for a seamless puncture and injection of liquid medication, thus improving injection efficiency. Attached Figure Description

[0019] Figure 1 This is a half-sectional view of the syringe handle of the present invention; Figure 2 yes Figure 1 A magnified view of the I-shaped image; Figure 3 This invention relates to a three-dimensional veterinary electric injector. Figure 1 ; Figure 4 This invention relates to a three-dimensional veterinary electric injector. Figure 2 ; Figure 5 yes Figure 3 The front view; Figure 6 yes Figure 5 AA section view; Figure 7 yes Figure 6 BB section view; Figure 8 yes Figure 7 II magnified view; Figure 9 yes Figure 7 III magnified view; Figure 10 yes Figure 7 CC section view; Figure 11 This is a 3D view of the rear shell component; Figure 12 It is a three-dimensional motor connecting plate armor Figure 1 ; Figure 13 It is a three-dimensional motor connecting plate armor Figure 2 ; Figure 14 This is a 3D view of motor connection plate B; Figure 15 This is a 3D view of the front shell component; Figure 16 This is a physical image of the syringe handle of the present invention; Figure 17 This is a physical image of the veterinary electric injector of the present invention; In the diagram: 11. Straight tube grip, 111. Stepped groove, 121. Fin plate, 122. Push-button switch, 131. Connecting cavity, 132. Needle connector, 1321. Insertion groove, 133. Hose connector, 1331. Step, 134. Snap ring, 1341. Inner convex edge, 14. Disposable needle, 21. Front shell, 211. Liquid level observation vertical hole, 212. Horizontal support plate, 22. Control panel, 31. Rear shell, 311. Shoulder strap upper hole, 3 12. Shoulder strap lower hole; 313. Medicine compartment mounting frame; 314. Battery mounting frame; 315. Connecting post; 32. Medicine compartment; 321. Medicine outlet; 3211. Conical structure; 322. Medicine inlet; 323. Cover; 3231. Duckbill valve; 324. Quick connector; 33. Battery; 341. Syringe; 3411. Outer flange; 342. Forward one-way valve; 343. Reverse one-way valve; 344. T-connector; 345. Piston; 3451 346. Sealing ring; 347. Through-type lead screw motor; 348. Lead screw; 3491. Sliding shaft; 3402. Anti-loosening nut; 3473. Insert hole; 3474. Fastening screw hole; 3475. Set screw; 3476. Fastening blind hole; 348. Guide tube; 3491. Sliding groove; 3492. Connecting flange; 3493. Snap ring; 3494. Motor connecting plate; 3495. Sinking groove; 3496. Lead screw through hole; 3497. 3. Motor mounting screw hole; 34924. Connecting hole A; 3493. Motor connecting plate B; 34931. Countersunk hole; 34932. Motor connecting hole; 34933. Lead screw through hole B; 34934. Radial groove; 3494. Bolt connection; 35. Motor controller; 36. Drug guide tube; 37. Clamping plate; 38. Connecting screw C; 391. Pipe clamp; 392. Connecting screw D; 393. Bending plate; 4. Flexible hose; 5. Snake-shaped tube. Detailed Implementation

[0020] Example 1: See Figure 1-2A syringe handle includes a gripping straight tube 11, a switch base, a connecting member, and a disposable needle 14. The switch base is located on the outer front end of the gripping straight tube 11 and includes symmetrically arranged fins 121 and a push-button switch 122. The syringe handle has an overall dagger-like shape, which is conducive to puncture force. The push-button switch 122 is located on the fins 121. The power supply wire of the push-button switch 122 passes through the gripping straight tube 11. During puncture, a finger can be placed on the push-button switch 122. When the syringe handle encounters resistance from the animal's skin during puncture, the push-button switch 122 can be pressed in time, thereby initiating the delivery of liquid medication. The connecting member is located inside the front end of the gripping straight tube 11. The connecting member has a connecting cavity 131 inside. The front end of the connecting member has a needle tube connector 132 that is detachably connected to the disposable needle 14. The rear end of the connecting member has a hose connector 133. The needle tube connector 132 and the hose connector 133 are connected through the connecting cavity 131. Liquid medication is delivered to the disposable needle 14 through the hose connector 133 and the connecting cavity 131.

[0021] The front end of the needle connector 132 is provided with an annular mounting groove 1321 that matches the disposable needle 14, so as to realize the detachable installation of the disposable needle 14 and facilitate the replacement of the disposable needle 14.

[0022] The connecting component also includes a retaining ring 134; the outer wall of the head end of the hose connector 133 is provided with a step 1331; the inner wall of the front end of the holding straight tube 11 is provided with a step groove 111 that matches the step 1331; the inner wall of the retaining ring 134 is threadedly connected to the outer wall of the front end of the holding straight tube 11; the front end of the retaining ring 134 extends inward from the inner protrusion 1341 that matches the step 1331; the inner protrusion 1341 cooperates with the step groove 111 to limit the step 1331, thereby realizing the connection between the hose connector 133 and the holding straight tube 11; the rear end of the needle connector 132 is threadedly connected to the front end of the hose connector 133, realizing the connection between the needle connector 132 and the holding straight tube 11.

[0023] The fin plate 121 is tilted backward, which is beneficial for the puncture force of the syringe handle.

[0024] The working principle of this embodiment is as follows: the syringe handle is shaped like a dagger, which is conducive to puncture and force application; during the puncture process, the finger can be placed on the button switch 122; when the syringe handle encounters resistance from the animal's skin during puncture, the button switch 122 can be pressed in time, thereby starting the delivery of liquid drugs; the liquid drugs are delivered to the disposable needle 14 through the tubing connector 133 and the connecting cavity 131.

[0025] Example 2: See Figure 3-15A veterinary electric syringe including the syringe handle described in Embodiment 1 further includes a front shell 21 component, a rear shell 31 component, a tubing 4, and a connecting screw; the front shell 21 component includes a front shell 21; the rear shell 31 component includes a rear shell 31, a drug chamber 32, a battery 33, an injection mechanism, a motor controller 35, and a drug delivery tube 36; the drug chamber 32, battery 33, injection mechanism, and motor controller 35 are all installed inside the rear shell 31; the rear shell 31 integrates the drug chamber 32, battery 33, injection mechanism, motor controller 35, and drug delivery tube 36 together; the front shell 21 and... The rear shells 31 are interlocked and connected by connecting screws to form an integral outer shell, which protects the drug compartment 32, battery 33, injection mechanism, motor controller 35 and drug delivery tube 36. The injection mechanism includes a vertical syringe 341, a forward one-way valve 342, a reverse one-way valve 343, a three-way valve 344, a piston 345, a through-type lead screw motor 346, a lead screw 347, and a guide tube 348. The syringe 341, the through-type lead screw motor 346, and the guide tube 348 are vertically connected in sequence. The top of the syringe 341 is connected to the first connector of the three-way valve 344. A forward check valve 342 is installed in the forward direction at the second connector of the tee 344; a reverse check valve 343 is installed in the reverse direction at the third connector of the tee 344; a piston 345 is vertically and slidably fitted inside the syringe 341; the upper end of a lead screw 347 is connected to the lower end of the piston 345; the middle part of the lead screw 347 is fitted with a through-type lead screw motor 346; the lower end of the lead screw 347 is provided with a horizontal sliding shaft 3471; the guide tube 348 is provided with a vertical sliding groove 3481 that fits with the sliding shaft 3471; the battery 33 is connected to the through-type lead screw motor 346 via a motor controller 35. 46 Electrical connection; the bottom of the medicine chamber 32 is provided with a medicine outlet 321; the medicine outlet 321 is connected to the forward one-way valve 342 through the medicine inlet tube 36; the reverse one-way valve 343 is connected to the hose connector 133 through the hose 4; the through-type lead screw motor 346 acts on the piston 345 through the lead screw 347, so that the piston 345 moves axially within the syringe 341; the sliding groove 3481 cooperates with the sliding shaft 3471 to prevent the lead screw 347 from rotating, ensuring that the product of the rotational speed of the through-type lead screw motor 346 and the lead of the lead screw 347 is the speed at which the piston 345 moves axially;Precise control of the rotation angle and number of revolutions during motor injection allows for precise control of the distance the piston 345 moves, thus achieving precise control of its axial movement. The upward movement of the piston 345 increases the pressure within the syringe 341, allowing air or liquid medication within the syringe 341 to be delivered to the disposable needle 14 via the reverse one-way valve 343 and the tubing 4. This precise control of the piston 345's upward axial movement can be converted into control of the single injection volume. The downward movement of the piston 345 reduces the pressure within the syringe 341, allowing liquid medication in the drug reservoir 32 to be drawn into the syringe 341 via the drug delivery tube 36 and the forward one-way valve 342. The upper and lower parts of the rear shell 31 are respectively provided with a shoulder strap upper hole 311 and a shoulder strap lower hole 312, which can be used to secure the upper and lower ends of the shoulder strap, increasing the portability of the veterinary electric injector and reducing injection difficulty.

[0026] Compared with the prior art, the through-type lead screw motor 346 of the present invention acts on the piston 345 through the lead screw 347, causing the piston 345 to move axially within the injection cylinder 341; the sliding groove 3481 cooperates with the sliding shaft 3471 to prevent the lead screw 347 from rotating, ensuring that the product of the rotational speed of the through-type lead screw motor 346 and the lead of the lead screw 347 is the speed of the axial movement of the piston 345, so as to achieve precise control of the axial movement of the piston 345; the upward movement of the piston 345 will increase the pressure inside the injection cylinder 341, so that the air or liquid drug inside the injection cylinder 341 is delivered to the disposable needle 14 through the reverse one-way valve 343 and the tubing 4; the precise control of the axial upward movement of the piston 345 can be converted into control of the single injection volume; the downward movement of the piston 345 will reduce the pressure inside the injection cylinder 341, so that the liquid drug in the drug chamber 32 is drawn into the injection cylinder 341 through the drug inlet tube 36 and the forward one-way valve 342.

[0027] The drug outlet 321 is connected to the drug inlet tube 36 via a quick connector 324 for easy maintenance and replacement.

[0028] The bottom of the medicine container 32 is provided with a cone-shaped structure 3211; the input end of the cone-shaped structure 3211 is connected to the bottom of the medicine container 32; the output end of the cone-shaped structure 3211 is connected to the medicine outlet 321; the cone-shaped structure 3211 is conducive to draining the liquid medicine in the medicine container 32.

[0029] The upper end of the lead screw 347 is threaded with the lower end of the piston 345, enabling a detachable connection between the lead screw 347 and the piston 345, which facilitates installation and disassembly.

[0030] The upper end of the lead screw 347 is threaded with an anti-loosening nut 3472; the anti-loosening nut 3472 abuts against the lower end of the piston 345; the anti-loosening nut 3472 can prevent the piston 345 from loosening and falling off from the upper end of the lead screw 347.

[0031] The lower end of the lead screw 347 is provided with an insertion hole 3473 that matches the sliding shaft 3471; the sliding shaft 3471 is inserted into the insertion hole 3473 to realize the detachable connection between the sliding shaft 3471 and the insertion hole 3473, which facilitates installation and disassembly.

[0032] The lower end face of the lead screw 347 is provided with a fastening screw hole 3474 communicating with the insertion hole 3473; the fastening screw hole 3474 is internally threaded with a set screw 3475; the end face of the set screw 3475 abuts against the side of the sliding shaft 3471; the set screw 3475 limits the sliding shaft 3471 to prevent the sliding shaft 3471 from coming out of the insertion hole 3473.

[0033] The sliding shaft 3471 has a fastening blind hole 3476 on its side that mates with the set screw 3475; the fastening blind hole 3476 enhances the limiting effect of the set screw 3475 on the sliding shaft 3471.

[0034] The front housing 21 also includes a control panel 22; the control panel 22 can adjust the output of the through-type lead screw motor 346, thereby adjusting the dosage of liquid drug in a single injection; the front housing 21 has a through mounting hole for the control panel 22; the control panel 22 is nested in the mounting hole for easy operation and adjustment of the control panel 22; the control panel 22 is electrically connected to the motor controller 35.

[0035] Several sealing rings 3451 are evenly distributed on the side of the piston 345; these sealing rings 3451 are fitted into the side of the piston 345 to improve the sealing effect between the piston 345 and the syringe 341, so as to avoid errors in the dosage of a single injection. In this embodiment, there are two sealing rings 3451.

[0036] The inner wall of the rear shell 31 is provided with a medicine tank mounting frame 313 that matches the medicine tank 32; the medicine tank 32 is fitted into the medicine tank mounting frame 313 to fix the medicine tank 32; the inner wall of the front shell 21 is provided with a liquid level observation vertical hole 211 and a horizontal support plate 212 corresponding to the medicine tank mounting frame 313; the liquid level observation vertical hole 211 penetrates the inner wall of the front shell 21; the liquid level observation vertical hole 211 can be used to know the amount of liquid medicine in the medicine tank 32; the horizontal support plate 212 abuts against the medicine tank 32 to increase the installation stability of the medicine tank 32.

[0037] The inner wall of the rear shell 31 is provided with a battery mounting frame 314 that matches the battery 33; the battery 33 is embedded in the battery mounting frame 314 to realize the installation of the battery 33; the rear shell 31 component also includes a clamping plate 37 and a connecting screw C 38; the battery mounting frame 314 is symmetrically provided with connecting posts 315 on both sides; the clamping plate 37 is connected to the connecting post 315 through the connecting screw C 38 to clamp the battery 33 and increase the installation stability of the battery 33.

[0038] The rear housing 31 component also includes a pipe clamp 391, a connecting screw 392, and a bending plate 393; the pipe clamp 391 clamps the injection cylinder 341 and is connected to the rear housing 31 by the connecting screw 392; one end of the bending plate 393 is connected to the through-type lead screw motor 346, and the other end is connected to the rear housing 31 by the connecting screw 392.

[0039] The top of the medicine container 32 is provided with a medicine inlet 322 to replenish the medicine container 32 with liquid medicine; the pressure port is equipped with a cover 323 to seal the medicine inlet 322, to prevent foreign objects from entering the medicine container 32 and contaminating the liquid medicine, and to prevent the liquid medicine from splashing out and causing waste; a duckbill valve 3231 is embedded in the center of the cover 323 to balance the air pressure inside and outside the medicine container 32 and ensure the continuous delivery of liquid medicine.

[0040] The bottom of the syringe 341 is provided with an outwardly protruding edge 3411; the injection mechanism also includes a retaining ring 3491, a motor connecting plate A 3492, a motor connecting plate B 3493, a bolt connecting part 3494, and a countersunk screw; the top surface of the motor connecting plate A 3492 is provided with a countersunk groove 34921 corresponding to the outwardly protruding edge 3411 and a lead screw through hole A 34922 corresponding to the lead screw; the countersunk groove 34921 is evenly distributed with motor mounting screw holes 34923 corresponding to the through-type lead screw motor 346; the motor connecting plate A 3492 is provided with a connecting hole A 34924 corresponding to the bolt connecting part 3494; the retaining ring 3491 is fitted outside the syringe 341, above the outwardly protruding edge 3411; the retaining ring 3491 is below... The upper end of the outer protrusion 3411 abuts against the upper end of the buckle 3491 and the upper end of the bolt connection 3494; the motor connecting plate A 3492 enables the detachable connection between the injection cylinder 341 and the through-type lead screw motor 346; the upper end of the guide tube 348 is provided with a connecting flange 3482; the upper end of the motor connecting plate B 3493 is provided with a countersunk hole 34931; the countersunk screw passes through the countersunk hole 34931 and connects with the connecting flange 3482; the motor connecting plate B 3493 is also provided with a motor connecting hole 34932 corresponding to the through-type lead screw motor 346 and a lead screw through hole B 34933 corresponding to the lead screw 347; the motor connecting plate B 3493 enables the detachable connection between the guide tube 348 and the through-type lead screw motor 346.

[0041] The sliding groove 3481 passes through the connecting flange 3482; the edge of the lead screw through hole 34933 is provided with a radial groove 34934 that matches the sliding groove 3481; the sliding shaft 3471 can pass into the radial groove 34934, making the structure of the entire injection mechanism more compact.

[0042] The veterinary electric injector also includes a serpentine tube 5; the serpentine tube 5 is fitted over the flexible tube 4, with one end connected to the lower end of the gripping straight tube 11 and the other end connected to the top of the overall housing; the serpentine tube 5 protects the flexible tube.

[0043] The working principle of this embodiment is as follows: The through-type lead screw motor 346 acts on the piston 345 through the lead screw 347, causing the piston 345 to move axially within the injection cylinder 341; the sliding groove 3481 cooperates with the sliding shaft 3471 to prevent the lead screw 347 from rotating, ensuring that the product of the rotational speed of the through-type lead screw motor 346 and the lead screw 347 is the speed of the axial movement of the piston 345, thereby achieving precise control of the axial movement of the piston 345; the upward movement of the piston 345 will increase the pressure inside the injection cylinder 341, allowing the air or liquid drug inside the injection cylinder 341 to be delivered to the disposable needle 14 through the reverse one-way valve 343 and the tubing 4; the precise control of the axial upward movement of the piston 345 can be converted into control of the single injection volume; the downward movement of the piston 345 will reduce the pressure inside the injection cylinder 341, allowing the liquid drug in the drug chamber 32 to be drawn into the injection cylinder 341 through the drug inlet tube 36 and the forward one-way valve 342.

[0044] Example 3: A continuous injection method for a veterinary electric injector as described in Example 2, comprising the following steps: ① Add liquid medicine to medicine tank 32 ② Delivery of liquid medication into syringe 341 Press the corresponding button switch 122 on the syringe handle; the motor controller 35 controls the through-type lead screw motor 346 to output reverse torque, driving the piston 345 to move downward; the air pressure inside the syringe 341 decreases, and the liquid drug in the drug chamber 32 enters the syringe 341 through the drug inlet tube 36 and the forward one-way valve 342 under atmospheric pressure; because of the presence of the reverse one-way valve 343, the liquid or air in the tubing 4 will not enter the syringe 341. ③Purge the air from hose 4 Press the corresponding button switch 122 on the syringe handle; the motor controller 35 controls the through-type lead screw motor 346 to output positive torque, driving the piston 345 to move upward; the positive torque output by the through-type lead screw motor 346 controls the lead screw 347 to rotate at a fixed angle; because of the presence of the positive one-way valve 342, the liquid drug cannot enter the drug delivery tube 36, but can only be delivered to the disposable needle 14 through the reverse one-way valve 343; the axial upward movement of the piston 345 is precisely controlled, which can be converted into the control of the single injection volume; the amount of liquid drug delivered each time is the dose of the single injection; Press the corresponding button switch 122 on the syringe handle multiple times until the disposable needle 14 can expel the liquid drug; ④ Single injection Hold the straight tube 11 in your hand, wedge the fin plate 121 in the web of your thumb and forefinger, and place one finger on the button that drives the through-type lead screw motor 346 to output positive torque. Aim at the injection site and insert the disposable needle 14 into it; when the disposable needle 14 is inserted into the animal's skin, the syringe handle will experience forward resistance; due to inertia, the finger will press the button; the motor controller 35 controls the through-type lead screw motor 346 to output positive torque, driving the piston 345 to move upward; the positive torque output by the through-type lead screw motor 346 controls the lead screw 347 to rotate at a fixed angle; the liquid drug is delivered to the disposable needle 14 through the reverse one-way valve 343; ⑤ Continuous injection Repeat step ④ until the liquid medication in syringe 341 is completely used.

Claims

1. A syringe handle, characterized in that, The device includes a gripping straight tube, a switch base, a connecting component, and a disposable needle. The switch base is located on the outer front end of the gripping straight tube and includes symmetrically arranged fins and a push-button switch. The push-button switch is located on the fins. The power supply wire of the push-button switch passes through the gripping straight tube. The connecting component is located inside the front end of the gripping straight tube. The connecting component has a connecting cavity inside. The front end of the connecting component has a needle tube connector that can be detachably connected to the disposable needle. The rear end of the connecting component has a flexible tube connector. The needle tube connector and the flexible tube connector are connected through the connecting cavity.

2. The syringe handle according to claim 1, characterized in that: The front end of the needle connector has an annular groove that matches a disposable needle.

3. The syringe handle according to claim 1, characterized in that: The connecting component also includes a retaining ring; the outer wall of the hose connector head is provided with a step; the inner wall of the holding straight tube front end is provided with a step groove that matches the step; the inner wall of the retaining ring is threaded to the outer wall of the holding straight tube front end; the front end of the retaining ring extends inward from the inner protrusion corresponding to the step; the rear end of the needle connector is threaded to the front end of the hose connector.

4. A veterinary electric syringe comprising the syringe handle of claim 1, characterized in that: It also includes a front shell assembly, a rear shell assembly, a hose, and connecting screws; the front shell assembly includes a front shell; the rear shell assembly includes a rear shell, a drug reservoir, a battery, an injection mechanism, a motor controller, and a drug delivery tube; the drug reservoir, battery, injection mechanism, and motor controller are all installed inside the rear shell; the front and rear shells are interlocked and connected by connecting screws; the injection mechanism includes a vertical syringe, a forward one-way valve, a reverse one-way valve, a three-way valve, a piston, a through-type lead screw motor, a lead screw, and a guide tube; the syringe, through-type lead screw motor, and guide tube are vertically connected in sequence; the top of the syringe is connected to the first connector of the three-way valve; the forward one-way valve... The first connector is installed at the second joint of the tee; the reverse check valve is installed in the reverse direction at the third joint of the tee; the piston slides vertically and is sealed inside the syringe; the upper end of the lead screw is connected to the lower end of the piston; the middle part of the lead screw is connected to the through-type lead screw motor; the lower end of the lead screw has a horizontal sliding shaft; the guide tube has a vertical sliding groove that is connected to the sliding shaft; the battery is electrically connected to the through-type lead screw motor through the motor controller; the bottom of the medicine chamber has a medicine outlet; the medicine outlet is connected to the forward check valve through the medicine guide tube; the reverse check valve is connected to the hose connector through the hose; the upper and lower parts of the rear shell have a shoulder strap upper hole and a shoulder strap lower hole, respectively.

5. The veterinary electric injector according to claim 4, characterized in that: The front housing component also includes a control panel; the front housing has a through-hole for mounting the control panel; the control panel is nested within the control panel mounting hole; the control panel is electrically connected to the motor controller.

6. The veterinary electric injector according to claim 4, characterized in that: The inner wall of the rear shell is provided with a medicine tank mounting frame that matches the medicine tank; the medicine tank is fitted into the medicine tank mounting frame; the inner wall of the front shell is provided with a liquid level observation vertical hole and a horizontal support plate corresponding to the medicine tank mounting frame; the liquid level observation vertical hole penetrates the inner wall of the front shell; the horizontal support plate abuts against the medicine tank.

7. The veterinary electric injector according to claim 4, characterized in that: The top of the medicine compartment is equipped with a medicine inlet; the pressure port is covered with a cover; and a duckbill valve is embedded in the center of the cover.

8. The veterinary electric injector according to claim 4, characterized in that: The syringe barrel has an outwardly protruding edge at the bottom; the injection mechanism also includes a retaining ring, motor connecting plate A, motor connecting plate B, bolt connectors, and a countersunk screw; the top surface of motor connecting plate A has a countersunk groove corresponding to the outwardly protruding edge and a lead screw through hole A corresponding to the lead screw; the countersunk groove is evenly distributed with motor mounting screw holes corresponding to the through-type lead screw motor; motor connecting plate A has a connecting hole A corresponding to the bolt connector; the retaining ring is fitted outside the syringe barrel, above the outwardly protruding edge; the lower end of the retaining ring abuts against the upper end of the outwardly protruding edge; the upper end of the retaining ring abuts against the bolt connector; the upper end of the guide tube has a connecting flange; the upper end of motor connecting plate B has a countersunk hole; the countersunk screw passes through the countersunk hole and connects to the connecting flange; motor connecting plate B also has a motor connecting hole corresponding to the through-type lead screw motor and a lead screw through hole B corresponding to the lead screw.

9. The veterinary electric injector according to claim 8, characterized in that: The sliding groove passes through the flange; the edge of the lead screw through hole is provided with a radial groove that matches the sliding groove.

10. A continuous injection method for a veterinary electric injector as described in claim 4, characterized in that: Includes the following steps: ① Add liquid medicine to the medicine tank ② Administering liquid medication into the syringe Press the corresponding button switch on the syringe handle; The motor controller controls the through-type lead screw motor to output reverse torque, driving the piston to move downward; the air pressure inside the syringe decreases, and the liquid drug in the drug chamber enters the syringe through the drug inlet tube and the forward one-way valve under the action of atmospheric pressure; because of the presence of the reverse one-way valve, liquid or air in the tubing will not enter the syringe. ③Purge the air from the hose Press the corresponding button switch on the syringe handle; the motor controller controls the through-type lead screw motor to output positive torque, driving the piston upward; the positive torque output by the through-type lead screw motor controls the lead screw to rotate at a fixed angle; because of the presence of the positive one-way valve, the liquid drug cannot enter the drug delivery tube, but can only be delivered to the disposable needle through the reverse one-way valve; the axial upward movement of the piston is precisely controlled, which can be converted into control of the single injection volume; the amount of liquid drug delivered each time is the dose of the single injection; Press the corresponding button switch on the syringe handle repeatedly until the disposable needle can expel the liquid medication; ④ Single injection Hold the straight tube with your hand, wedge the fin plate in the web between your thumb and forefinger, and place one finger on the button that drives the through-type lead screw motor to output positive torque; Aim at the injection site and insert the disposable needle into it; when the disposable needle is inserted into the animal's skin, the syringe handle will experience forward resistance; due to inertia, the finger will press the button; the motor controller controls the through-type lead screw motor to output positive torque, driving the piston upward; the positive torque output by the through-type lead screw motor controls the lead screw to rotate at a fixed angle; the liquid drug is delivered to the disposable needle through the reverse one-way valve; ⑤ Continuous injection Repeat step ④ until the liquid medication in the syringe is completely used.

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