Liquid medicine injection device with adjustable internal pressure

Abstract

The invention discloses an internal pressure adjustable liquid medicine injection device, and belongs to the field of medical instruments, the internal pressure adjustable liquid medicine injection device comprises a placing groove, one side of the placing groove is fixedly connected with a mounting frame, a piston cylinder is sleeved in the placing groove, a piston is slidably connected in the piston cylinder, one side of the piston is provided with a piston sleeve, and the piston sleeve is provided with a piston rod. And an adjusting assembly for adjusting injection pressure is arranged on one side of the inner surface of the mounting frame. The injection pressure can be adjusted according to actual injection requirements, so that liquid medicine is smoother when entering blood vessels of animals, pain of injection positions caused by too high flow speed and too high pressure is avoided, the injection pressure needs to be adjusted when liquid medicine with different concentrations is injected, accuracy and safety during injection are guaranteed, and the injection efficiency is improved. By managing the pressure and the force of the injector, the treatment effect can be improved, and the stability of animals during injection can be improved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more particularly to a liquid medicine injection device with adjustable internal pressure. Background Art

[0002] A syringe is a common medical device that uses a needle to extract or inject gases or liquids. It can also be used in medical devices and containers, such as some scientific instruments used in chromatography, to inject through a rubber septum.

[0003] In the breeding of large animals such as cattle and horses, when vaccinating animals or treating diseases, most existing syringes use manual squeezing to inject drugs. Manual squeezing pushes the drug liquid into the animal's body. The force used by different staff to squeeze the syringe cannot be controlled to be consistent, and the pressure cannot be dynamically adjusted according to the characteristics of different drugs and injection conditions. This fixed pressure often leads to inconsistent drug administration speed, which may cause discomfort to animals, inaccurate dosage and potential complications. Excessive injection pressure may trigger a stress response in animals and cause accidental personal injury to staff. Summary of the Invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a liquid medicine injection device with adjustable internal pressure.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A liquid medicine injection device with adjustable internal pressure includes a placement groove, one side of which is fixedly connected to a mounting frame, a piston cylinder is sleeved inside the placement groove, a piston is slidably connected inside the piston cylinder, one side of the piston is provided with a piston sleeve, and one side of the inner surface of the mounting frame is provided with an adjustment component for adjusting the injection pressure.

[0007] The adjusting assembly includes a servo motor fixed on one side of the mounting frame, a first slide groove opened on the inner surface of the mounting frame and a push plate sliding on the bottom of the mounting frame. The output end of the servo motor is fixedly connected to the first gear, the interior of the first slide groove is slidably connected to a metal slider, a second threaded rod is rotatably provided on one side of the metal slider, the outer surface of the second threaded rod is fixedly connected to the second gear near the metal slider, the outer surface of the second threaded rod is threadedly connected to an internal threaded sleeve block, and the front and rear sides of the internal threaded sleeve block are fixedly connected to a limit plate.

[0008] Further, an installation groove is formed on the upper surface of the placement groove. An installation strip is slidably connected inside the installation groove. A baffle is fixedly connected to the upper surface of the installation strip. A semi-circular groove is formed on one side inside the placement groove. Driving grooves are formed on both sides of the push plate. The driving grooves are adapted to the internally threaded sleeve blocks. A U-shaped frame is fixedly connected to the front side of the push plate. The second gear meshes with the first gear. The cross-sections of the installation groove and the installation strip are T-shaped. An arc groove adapted to the outer flange of the piston cylinder is formed on the inner surface of the placement groove. There are two groups of second gears, and the diameters of the two second gears are different. A rubber pad is arranged on the outer surface of the internally threaded sleeve block.

[0009] Further, a disassembly component is arranged at the top inside the first chute. The disassembly component includes a slotted groove formed at the top inside the first chute. Card slots are formed on both sides of the inner surface of the slotted groove. A T-shaped block is sleeved inside the slotted groove. A groove is formed at the top of the T-shaped block. An L-shaped rod slides inside the groove. A spring is fixedly connected to one side of the L-shaped rod.

[0010] Further, one side of the L-shaped rod extends into the inside of the card slot. The spring is located inside the groove. One side of the spring is fixedly connected to one side of the groove.

[0011] Further, a quantitative component for realizing quantitative input of the medicament is arranged on one side of the installation frame. The quantitative component includes a through groove formed on one side of the inner surface of the installation frame and a fixing plate fixed at the edge of one side of the installation frame. A first threaded rod rotates inside the fixing plate. A moving plate is threadedly connected to the outer surface of the first threaded rod. A servo motor switch is fixedly connected to one side of the moving plate. The moving plate slides inside the through groove. A scale bar is arranged above the first threaded rod on one side of the installation frame.

[0012] Further, a mixing component for mixing the liquid is arranged on one side of the inner surface of the piston cylinder. The mixing component includes a rotating sleeve rotating on one side of the inner surface of the piston cylinder, a driving rod fixed on the inner surface of the piston sleeve, and a liquid inlet pipe fixed on one side of the piston cylinder. A plurality of liquid inlet openings are formed on the outer surface of the rotating sleeve. A rotating shaft is fixedly connected to one side of the rotating sleeve. A spiral groove is formed on the outer surface of the rotating shaft.

[0013] Further, one side of the rotating shaft extends into the inside of the piston sleeve. One side of the driving rod extends into the inside of the spiral groove. The spiral groove and the driving rod slide relative to each other. A groove is formed on one side of the piston.

[0014] Furthermore, a switching assembly is provided on one side of the liquid inlet pipe, and the switching assembly includes a conversion frame fixed on one side of the liquid inlet pipe and two second slide grooves axially symmetrically opened on the outer surface of the piston cylinder. The interior of the conversion frame is rotatably connected to a piston block, a connecting hole is opened inside the piston block, a spline shaft is provided on one side of the connecting hole, and four connecting heads with different diameters are provided on one side of the conversion frame.

[0015] Furthermore, the interior of the second slide groove is slidably connected to a connecting slider, the outer surface of the piston cylinder is sleeved with a cylinder, the inner surface of the cylinder is provided with an annular groove, a support rod is fixedly connected to the edge of the inner surface of the cylinder, and one side of the support rod is fixedly connected to a drive sleeve.

[0016] Furthermore, the drive sleeve and the spline shaft are adapted to each other, the drive sleeve is made of iron, one side of the connecting slider extends to slide inside the annular groove, and one side of the spline shaft extends out of the interior of the conversion frame. The outer surface of the spline shaft is provided with an identification plate, and the identification plate is provided with an indicator groove, and the position of the indicator groove corresponds to the position of the connecting hole.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This solution is equipped with an adjustment component to adjust the injection pressure according to the actual injection needs, so that the drug solution can enter the animal's blood vessels more smoothly, avoiding pain at the injection site due to excessive flow rate and excessive pressure. Similarly, the injection pressure needs to be adjusted when injecting drugs of different concentrations to ensure accuracy and safety during treatment. Managing the pressure and strength of the syringe can not only improve the treatment effect, but also help the animal remain stable during injection, avoiding harm to the staff due to animal stress.

[0019] 2. This solution is provided with a disassembly component, and the second gear of appropriate diameter is selected for reinstallation. The new metal slider is replaced inside the first slide groove through the slot, and the T-shaped block is fixed inside the slot. Therefore, it is no longer limited to using only the two second gears of different diameters provided with the device. Different second gears can be selected according to actual conditions to adjust the pressure, making the application range of the injection device wider and the use environment more diverse.

[0020] 3. This solution is equipped with a quantitative component. When the push plate moves to push the piston sleeve to move, when it contacts the servo motor switch, it squeezes the servo motor switch, and controls the servo motor to turn off through an electrical signal, stopping further movement, thereby ensuring that the injection volume is accurately controlled, avoiding the impact of excessive or insufficient liquid medicine on treatment, and improving the functionality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the regulating component of the present invention;

[0023] Figure 3 This is a schematic diagram of the disassembly assembly structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the placement slot structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the piston cylinder structure of the present invention;

[0026] Figure 6 Schematic diagram of the internal structure of the piston cylinder of the present invention;

[0027] Figure 7 It is a schematic diagram of the rotating shaft structure of the present invention;

[0028] Figure 8 It is a schematic diagram of the conversion frame structure of the present invention.

[0029] Description of the numbers in the figure:

[0030] 1. Placement slot; 2. Installation frame;

[0031] 3. Adjustment assembly; 31. Servo motor; 32. First gear; 33. Push plate;

[0032] 34. Disassembly assembly; 341. T-shaped block; 342. Groove; 343. Slot; 344. L-shaped rod; 345. Slot; 346. Spring;

[0033] 35. Dosing assembly; 351. Fixed plate; 352. First threaded rod; 353. Moving plate; 354. Servo motor switch; 355. Through slot;

[0034] 36. First chute; 37. Metal slider; 38. Drive slot; 39. Internally threaded sleeve; 310. Second threaded rod; 311. Limiting plate; 312. Second gear;

[0035] 4. Piston cylinder; 5. Baffle;

[0036] 6. Mixing assembly; 61. Rotating sleeve; 62. Liquid inlet; 63. Spiral groove; 64. Rotating shaft; 65. Driving rod;

[0037] 66, switching assembly; 661, support rod; 662, drive sleeve; 663, conversion frame; 664, connecting hole; 665, spline shaft; 666, connector; 667, piston block; 668, cylinder; 669, second slide groove; 6610, annular groove; 6611, connecting slider; 67, liquid inlet pipe;

[0038] 7. Piston sleeve; 8. Piston; 9. Semicircular groove; 10. Mounting strip; 11. Mounting groove. Specific implementation manner

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figures 1 to 8 , a liquid drug injection device with adjustable internal pressure, including a placement groove 1, a piston cylinder 4 is sleeved inside the placement groove 1, a piston 8 is slidably connected inside the piston cylinder 4, a piston sleeve 7 is arranged on one side of the piston 8, and an adjusting component 3 for adjusting the injection pressure is arranged on one side of the inner surface of the mounting frame 2.

[0041] As Figure 1 and Figure 2 shown, the adjusting component 3 includes a servo motor 31 fixed on one side of the mounting frame 2, a first chute 36 opened on the inner surface of the mounting frame 2, and a push plate 33 slid on the inner bottom of the mounting frame 2. The output end of the servo motor 31 is fixedly connected with a first gear 32. A metal slider 37 is slidably connected inside the first chute 36. A second threaded rod 310 is rotatably arranged on one side of the metal slider 37. A second gear 312 is fixedly connected to the outer surface of the second threaded rod 310 near the metal slider 37. The outer surface of the second threaded rod 310 is threadedly connected with an internally threaded sleeve block 39. Limiting plates 311 are fixedly connected to the front and rear sides of the internally threaded sleeve block 39. Driving grooves 38 are opened on both sides of the push plate 33.

[0042] A mounting groove 11 is opened on the upper surface of the placement groove 1. A mounting strip 10 is slidably connected inside the mounting groove 11. A baffle 5 is fixedly connected to the upper surface of the mounting strip 10. A semicircular groove 9 is opened on one side inside the placement groove 1. Driving grooves 38 are opened on both sides of the push plate 33. The driving grooves 38 are adapted to the internally threaded sleeve block 39. A U-shaped frame is fixedly connected to the front side of the push plate 33. The second gear 312 meshes with the first gear 32. The cross-sections of the mounting groove 11 and the mounting strip 10 are T-shaped. An arc groove adapted to the outer flange of the piston cylinder 4 is opened on the inner surface of the placement groove 1. There are two groups of second gears 312, and the diameters of the two second gears 312 are different. A rubber pad is arranged on the outer surface of the internally threaded sleeve block 39.

[0043] Before injection, place the piston barrel 4 filled with liquid medicine inside the placement groove 1. One end of the piston sleeve 7 is stuck inside the U-shaped frame, then insert the installation bar 10 into the installation groove 11, install the baffle 5 on the placement groove 1 to fix the piston barrel 4. Before injection, according to different animals, the injection pressure needs to be adjusted. When injecting the cubs of animals, since the blood vessels of animal cubs are relatively delicate, at this time, push the metal slider 37 corresponding to the second gear 312 with a larger diameter to slide inside the first chute 36,带动 the second threaded rod 310 and the internally threaded sleeve block 39 to move horizontally. The internally threaded sleeve block 39 moves into the driving groove 38. Under the action of the rubber ring on the outer surface of the internally threaded sleeve block 39, the internally threaded sleeve block 39 is firmly stuck inside the driving groove 38. At the same time, the selected second gear 312 with a larger diameter meshes with the first gear 32. At this time, turn on the servo motor 31 to drive the first gear 32 to rotate. The first gear 32 drives the second threaded rod 310 to rotate through the transmission of the second gear 312. The second threaded rod 310 drives the internally threaded sleeve block 39 to slide on its outer surface. The internally threaded sleeve block 39 pushes the push plate 33 through the limiting plate 311. Since the diameter of the second gear 312 is larger than that of the first gear 32, in the same time, compared with the second gear with a smaller diameter 312, the number of turns of the second threaded rod 310 corresponding to the second gear 312 with a larger diameter is less. Therefore, the displacement distance of the internally threaded sleeve block 39带动 the driving groove 38 is smaller, and the pressure of the piston 8 squeezing the liquid inside the piston barrel 4 is relatively small. Thus, the liquid medicine enters the blood vessels of the animal more smoothly, avoiding the pain at the injection site caused by too fast flow rate. Similarly, when injecting liquid medicine with different concentrations, the injection pressure also needs to be adjusted to ensure the accuracy and safety during treatment. Managing the pressure and force of the syringe can not only improve the clinical effect but also help with the stability during animal injection.

[0044] As Figure 3 shown, a disassembly component 34 is provided at the inner top of the first chute 36. The disassembly component 34 includes a slot 345 opened at the inner top of the first chute 36. Card slots 343 are opened on both sides of the inner surface of the slot 345. A T-shaped block 341 is sleeved inside the slot 345. A groove 342 is opened at the top of the T-shaped block 341. An L-shaped rod 344 slides inside the groove 342. One side of the L-shaped rod 344 is fixed with a spring 346.

[0045] One side of the L-shaped rod 344 extends into the card slot 343. The spring 346 is located inside the groove 342. One side of the spring 346 is fixedly connected to one side of the groove 342.

[0046] Although the injection pressure inside the piston cylinder 4 can be adjusted according to actual needs, the injection pressures used are different due to different viscosity liquids, animals with different breeding cycles, and even needles of different thicknesses. Therefore, two sets of second gears 312 with different diameters may not be able to meet the needs of different injection pressures. Multiple second gears 312 with different diameters are needed. By changing the transmission ratio between the second gear 312 and the first gear 32 to adjust the pressure, the original second gear 312 needs to be replaced, and the two L-shaped rods 344 need to be pressed to remove it from the inside of the slot 343, thereby releasing the fixation of the T-shaped block 341 and removing the T-shaped block 341 from the slot. 345, the metal slider 37 can be slid out of the slot 345, driving the second threaded rod 310 and the internal threaded sleeve 39 to be removed from the inside of the mounting frame 2 as a whole, and the second gear 312 of the appropriate diameter can be reinstalled, and the new metal slider 37 can be re-placed inside the first slide groove 36 through the slot 345, and the T-shaped block 341 can be fixed inside the slot 345. This is no longer limited to using the two second gears 312 of different diameters provided with the device, and different second gears 312 can be selected according to actual conditions to adjust the pressure, making the injection device more applicable to a wider range of environments.

[0047] like Figure 2 As shown, a quantitative component 35 for realizing quantitative input of medicine is provided on one side of the mounting frame 2. The quantitative component 35 includes a through slot 355 opened on one side of the inner surface of the mounting frame 2 and a fixed plate 351 fixed at the edge of one side of the mounting frame 2. The first threaded rod 352 is rotated inside the fixed plate 351, and the outer surface of the first threaded rod 352 is threadedly connected to a movable plate 353. A servo motor switch 354 is fixedly connected to one side of the movable plate 353. The movable plate 353 slides inside the through slot 355. A scale bar is provided above the first threaded rod 352 on one side of the mounting frame 2.

[0048] During injection, it is not necessary to inject all the medicine inside the piston cylinder 4. It is necessary to perform quantitative injections multiple times. Therefore, it is necessary to ensure that the amount of medicine injected each time is consistent. The first threaded rod 352 is rotated to drive the movable plate 353 to slide inside the through groove 355. After the injection amount of the medicine is determined, the movable plate 353 is moved to the position of the corresponding number on the scale bar. When the push plate 33 moves to push the piston sleeve 7 to move, when it contacts the servo motor switch 354, the servo motor switch 354 is squeezed, and the servo motor 31 is controlled to turn off through an electrical signal to stop moving, thereby ensuring that the injection amount is accurately controlled, avoiding the impact of too much or too little medicine on treatment, and improving the functionality of the device.

[0049] like Figure 5 - Figure 7As shown, a mixing assembly 6 for mixing liquids is provided on one side of the inner surface of the piston cylinder 4. The mixing assembly 6 includes a rotating sleeve 61 rotating on one side of the inner surface of the piston cylinder 4, a driving rod 65 fixed on the inner surface of the piston sleeve 7, and a liquid inlet pipe 67 fixed on one side of the piston cylinder 4. A plurality of liquid inlets 62 are provided on the outer surface of the rotating sleeve 61. A rotating shaft 64 is fixedly connected to one side of the rotating sleeve 61, and a spiral groove 63 is provided on the outer surface of the rotating shaft 64.

[0050] One side of the rotating shaft 64 extends to the inside of the piston sleeve 7, and one side of the driving rod 65 extends to the inside of the spiral groove 63. The spiral groove 63 and the driving rod 65 slide with each other. A groove is formed on one side of the piston 8.

[0051] When performing injection therapy, it is often necessary to mix and use a variety of different liquid medicines. The powder and crystal medicines need to be fully mixed with the liquid medicine. For this reason, when the liquid medicine is pumped into the interior of the piston cylinder 4, the piston sleeve 7 drives the drive rod 65 to move, and the drive rod 65 slides inside the spiral groove 63. The drive rod 65 moves horizontally and linearly, and cooperates with the spiral groove 63 to drive the rotating shaft 64 to rotate. The rotating shaft 64 synchronously drives the rotating sleeve 61 to rotate. When the liquid enters the interior of the piston cylinder 4, the liquid medicine first enters the interior of the rotating sleeve 61, and enters the interior of the piston cylinder 4 through the rotating liquid inlet 62. In conjunction with the rotation of the drive rod 65, the liquid medicine is fully stirred and mixed inside the piston cylinder 4 to prevent the powder medicine from precipitating and unable to melt, thereby reducing the therapeutic effect of the liquid medicine.

[0052] like Figure 5 、 Figure 6 and Figure 8 As shown, a switching assembly 66 is provided on one side of the liquid inlet pipe 67, and the switching assembly 66 includes a conversion frame 663 fixed on one side of the liquid inlet pipe 67 and two second slide grooves 669 axially symmetrically opened on the outer surface of the piston cylinder 4. The interior of the conversion frame 663 is rotatably connected to the piston block 667, and the interior of the piston block 667 is provided with a connecting hole 664. A spline shaft 665 is provided on one side of the connecting hole 664, and four connecting heads 666 with different diameters are provided on one side of the conversion frame 663.

[0053] The second sliding groove 669 is internally slidably connected to a connecting slider 6611, the outer surface of the piston cylinder 4 is sleeved with a cylinder 668, the inner surface of the cylinder 668 is provided with an annular groove 6610, and the inner surface edge of the cylinder 668 is fixedly connected to a support rod 661, and one side of the support rod 661 is fixedly connected to a drive sleeve 662.

[0054] The drive sleeve 662 and the spline shaft 665 are adapted to each other. The drive sleeve 662 is made of iron. One side of the connecting slider 6611 extends to slide inside the annular groove 6610, and one side of the spline shaft 665 extends out of the interior of the conversion frame 663. The outer surface of the spline shaft 665 is provided with a magnetic identification plate, and the identification plate is provided with an indicator groove. The position of the indicator groove corresponds to the position of the connecting hole 664.

[0055] In the breeding of large animals such as cattle and horses, when vaccinating or treating animals for diseases, since the animals are large and need to be injected multiple times regularly, you can choose to replace the needle and retain the injection body to reduce breeding costs. During the injection, there is not only a pressure requirement, but also the need to replace needles of different models and thicknesses according to different injection methods and the drugs used. For this reason, before selecting a suitable needle, you need to select a suitable connector 666. At this time, push the cylinder 668 to drive the drive sleeve 662 to approach the spline shaft 665, and put the drive sleeve 662 on the spline shaft 665. There is still a certain distance between the support rod 661 and the connector 666. Then rotate the cylinder 668, and the connecting slider 6611 slides relative to the annular groove 6610. The cylinder 668 drives the drive sleeve 662 to rotate, and synchronously drives the spline shaft 665 and the piston block 667 to rotate. According to the position of the indicator groove, the connecting hole 664 is rotated to the required connector 666 to overlap, and then the cylinder 668 is continued to be pushed to make the connecting slider 6611 slide to the end of the second slide groove 669. The drive sleeve 662 is also adsorbed and fixed by the magnetic marking disk, and the support rod 661 is located between the two adjacent connectors 666, which does not affect the subsequent insertion of the needle on the connector 666. Therefore, the syringe can meet a variety of injection needs, so that the syringe body can be reused. The use of an injection device with a replaceable needle can reduce breeding costs, while reducing the risk of cross infection caused by frequent replacement of syringes, and reducing the waste of medical resources.

[0056] After the injection of the liquid medicine inside the piston cylinder 4 is completed, in order to ensure that there is no residue inside the piston cylinder 4 to avoid cross infection next time, the piston sleeve 7 is pulled to drive the piston 8 to move out of the interior of the piston cylinder 4, and the drive rod 65 is disengaged from the interior of the spiral groove 63, so that the interior of the piston cylinder 4 can be cleaned and disinfected to avoid contamination of the liquid medicine to be injected next time.

[0057] Instructions for use: Select a suitable connector 666 according to the required injection method and the needle to be used, sleeve the drive sleeve 662 on the spline shaft 665, rotate the cylinder 668 to drive the piston block 667 to rotate, rotate the connecting hole 664 to the appropriate connector 666, sleeve the needle on the connector 666, pull the piston sleeve 7 to drive the piston 8 to move, the piston sleeve 7 drives the drive rod 65 to move, the drive rod 65 slides inside the spiral groove 63, the drive rod 65 moves horizontally and linearly, cooperates with the spiral groove 63 to drive the rotating shaft 64 to rotate, and the rotating shaft 64 synchronously drives the rotating sleeve 61 to rotate. When the liquid enters the interior of the piston cylinder 4, it first enters the interior of the rotating sleeve 61, enters the interior of the piston cylinder 4 through the rotating liquid inlet 62, and cooperates with the rotation of the drive rod 65 to fully stir and mix the liquid medicine inside the piston cylinder 4. Manually draw the liquid medicine into the interior of the piston cylinder 4, fix the piston cylinder 4 in the placement groove 1, and fix the piston cylinder 4 by the baffle 5.

[0058] By adjusting the coordination of the various components of the assembly 3, stable injection can be performed to ensure that the injection pressure is stable during the injection process. At the same time, with the coordination of the disassembly assembly 34, the second gear 312 of different diameters can be replaced, so that the most appropriate injection pressure can be adjusted. The first threaded rod 352 is rotated to drive the movable plate 353 to slide inside the through groove 355. According to the required injection volume, the movable plate 353 is moved to the position corresponding to the number on the required scale bar. When the push plate 33 moves and pushes the piston sleeve 7 to move, when it contacts the servo motor switch 354, the servo motor switch 354 is squeezed, and the servo motor 31 is controlled to be turned off through an electrical signal to stop further movement, thereby ensuring that the injection volume is accurately controlled. During injection, the liquid medicine enters the interior of the conversion frame 663 through the liquid inlet tube 67, and enters the interior of the connector 666 through the connecting hole 664 and enters the needle.

[0059] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A liquid drug injection device with adjustable internal pressure, comprising a placement groove (1), one side of the placement groove (1) is fixedly connected with a mounting frame (2), a piston cylinder (4) is sleeved inside the placement groove (1), a piston (8) is slidably connected inside the piston cylinder (4), and a piston sleeve (7) is arranged on one side of the piston (8); Its characteristics are: One side of the inner surface of the mounting frame (2) is provided with an adjusting component (3) for adjusting the injection pressure; The adjusting component (3) includes a servo motor (31) fixed on one side of the mounting frame (2), a first chute (36) opened on the inner surface of the mounting frame (2), and a push plate (33) slid on the inner bottom of the mounting frame (2). The output end of the servo motor (31) is fixedly connected with a first gear (32). A metal slider (37) is slidably connected inside the first chute (36). A second threaded rod (310) is rotatably arranged on one side of the metal slider (37). A second gear (312) is fixedly connected to the outer surface of the second threaded rod (310) near the metal slider (37). An internally threaded sleeve block (39) is threadedly connected to the outer surface of the second threaded rod (310). Limiting plates (311) are fixedly connected to the front and rear sides of the internally threaded sleeve block (39).

2. The liquid medicine injection device with adjustable internal pressure according to claim 1, characterized in that: An installation groove (11) is opened on the upper surface of the placement groove (1). An installation strip (10) is slidably connected inside the installation groove (11). A baffle (5) is fixedly connected to the upper surface of the installation strip (10). A semi-circular groove (9) is opened on one side inside the placement groove (1). Driving grooves (38) are opened on both sides of the push plate (33). The driving grooves (38) are adapted to the internally threaded sleeve block (39). A U-shaped frame is fixedly connected to the front side of the push plate (33). The second gear (312) is meshed with the first gear (32). The cross-sections of the installation groove (11) and the installation strip (10) are T-shaped. An arc groove adapted to the outer flange of the piston cylinder (4) is opened on the inner surface of the placement groove (1). There are two groups of the second gears (312), and the diameters of the two second gears (312) are different. A rubber pad is arranged on the outer surface of the internally threaded sleeve block (39).

3. The liquid medicine injection device with adjustable internal pressure according to claim 2, characterized in that: A disassembly component (34) is arranged at the inner top of the first chute (36). The disassembly component (34) includes a slot (345) opened at the inner top of the first chute (36). Claw slots (343) are opened on both sides of the inner surface of the slot (345). A T-shaped block (341) is sleeved inside the slot (345). A groove (342) is opened at the top of the T-shaped block (341). An L-shaped rod (344) is slid inside the groove (342). A spring (346) is fixedly connected to one side of the L-shaped rod (344).

4. The liquid medicine injection device with adjustable internal pressure according to claim 3, characterized in that: One side of the L-shaped rod (344) extends into the claw slot (343). The spring (346) is located inside the groove (342). One side of the spring (346) is fixedly connected to one side of the groove (342).

5. The liquid medicine injection device with adjustable internal pressure according to claim 4, characterized in that: A quantitative component (35) for achieving quantitative input of a medicine is provided on one side of the installation frame (2), and the quantitative component (35) comprises a through slot (355) provided on one side of the inner surface of the installation frame (2) and a fixed plate (351) fixed at an edge of one side of the installation frame (2), a first threaded rod (352) is rotated inside the fixed plate (351), and a movable plate (353) is threadedly connected to the outer surface of the first threaded rod (352), and a servo motor switch (354) is fixedly connected to one side of the movable plate (353), and the movable plate (353) is located inside the through slot (355) and slides, and a scale bar is provided above the first threaded rod (352) on one side of the installation frame (2).

6. The liquid medicine injection device with adjustable internal pressure according to claim 5, characterized in that: A mixing assembly (6) for mixing liquids is provided on one side of the inner surface of the piston cylinder (4). The mixing assembly (6) comprises a rotating sleeve (61) rotating on one side of the inner surface of the piston cylinder (4), a driving rod (65) fixed on the inner surface of the piston sleeve (7), and a liquid inlet pipe (67) fixed on one side of the piston cylinder (4). A plurality of liquid inlets (62) are provided on the outer surface of the rotating sleeve (61). A rotating shaft (64) is fixedly connected to one side of the rotating sleeve (61), and a spiral groove (63) is provided on the outer surface of the rotating shaft (64).

7. The liquid medicine injection device with adjustable internal pressure according to claim 6, characterized in that: One side of the rotating shaft (64) extends to the interior of the piston sleeve (7), and one side of the driving rod (65) extends to the interior of the spiral groove (63). The spiral groove (63) and the driving rod (65) slide with each other, and a groove is provided on one side of the piston (8).

8. The liquid medicine injection device with adjustable internal pressure according to claim 7, characterized in that: A switching assembly (66) is provided on one side of the liquid inlet pipe (67), and the switching assembly (66) includes a conversion frame (663) fixed on one side of the liquid inlet pipe (67) and two second slide grooves (669) axially symmetrically opened on the outer surface of the piston cylinder (4). The interior of the conversion frame (663) is rotatably connected to a piston block (667), and a connecting hole (664) is opened inside the piston block (667). A spline shaft (665) is provided on one side of the connecting hole (664). Four connecting heads (666) with different diameters are provided on one side of the conversion frame (663).

9. The liquid medicine injection device with adjustable internal pressure according to claim 8, characterized in that: The second sliding groove (669) is internally slidably connected to a connecting slider (6611), the outer surface of the piston cylinder (4) is sleeved with a cylinder (668), the inner surface of the cylinder (668) is provided with an annular groove (6610), the inner surface edge of the cylinder (668) is fixedly connected to a support rod (661), and one side of the support rod (661) is fixedly connected to a drive sleeve (662).

10. The liquid medicine injection device with adjustable internal pressure according to claim 9, characterized in that: The drive sleeve (662) and the spline shaft (665) are adapted to each other. The drive sleeve (662) is made of iron. One side of the connecting slider (6611) extends to slide inside the annular groove (6610). One side of the spline shaft (665) extends out of the interior of the conversion frame (663). The outer surface of the spline shaft (665) is provided with an identification plate, and the identification plate is provided with an indicator groove. The position of the indicator groove corresponds to the position of the connecting hole (664).

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