Intravenous injection practical training device

Abstract

The invention relates to the technical field of injection training, and particularly discloses an intravenous injection practical training device which comprises a bottom plate, a simulation layer is arranged at the top of the bottom plate, simulation leather sleeves the simulation layer, a rubber blood vessel is arranged in the simulation layer, and the end face of the rubber blood vessel is connected with an infusion tube; the device further comprises a transmission assembly and a pushing assembly, the transmission assembly is arranged on the side edge of the artificial leather, the pushing assembly is arranged on the side edge of the transmission assembly, through switching of the positions of needle holes in the surface of the artificial leather, the situation that the next injection practice is affected by the track of the needle holes is avoided, the resistance change of needle inserting is better felt, and therefore whether puncture succeeds or not is more accurately judged; by changing the diameter of the rubber blood vessel and the protruding state of the simulation blood vessel randomly and disorderly, medical staff can better simulate a real clinical environment, can contact various blood vessel conditions in the training process, and skillfully master puncture skills aiming at different blood vessel protruding conditions, and puncture errors in actual clinical operation are reduced.

Description

Technical Field

[0001] This invention relates to the field of injection training technology, specifically to an intravenous injection training device. Background Technology

[0002] For medical students and newly hired healthcare professionals, the intravenous injection training device provides a safe and repeatable practice platform. Through repeated practice on this device, they can become familiar with the basic procedures of intravenous injection, including how to correctly select the injection site, how to hold the syringe, and the angle at which to insert the needle. For example, when learning the needle insertion angle, trainees can try different angles (such as 15-30 degrees) on the training device and observe how the needle enters the simulated vein, thereby mastering the appropriate needle insertion angle. The key to intravenous injection is to accurately insert the needle into the vein. Through repeated practice, they can improve their probability of successful puncture on the first attempt in actual clinical operations, reducing patient discomfort. The training device can simulate various types of veins, such as different vessel diameters (from the thicker cephalic vein to the thinner small veins on the back of the hand) and different vessel depths. This allows medical staff to adapt to the vein conditions of different patients during training and enhances their ability to cope with complex real-world situations. However, the positions of different vessel diameters inside the training device are mostly fixed. Therefore, medical staff can judge the specific location of different vessel types based on training experience, but in real intravenous injection, it is not easy to judge the vessel type in advance, which affects the training effect. Summary of the Invention

[0003] The purpose of this invention is to provide an intravenous injection training device to solve the problem mentioned in the background art that medical trainees can judge the specific location of different blood vessel types based on training experience, but in actual intravenous injection, it is not easy to judge the blood vessel type in advance, which affects the training effect.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an intravenous injection training device, comprising: a base plate, a simulation layer provided on the top of the base plate, a simulation skin covering the outside of the simulation layer, a rubber blood vessel provided inside the simulation layer, and the end face of the rubber blood vessel connected to an infusion tube; It also includes a transmission component and a pushing component. The transmission component is located on the side of the simulated skin, and the pushing component is located on the side of the transmission component. The transmission component is controlled to move, and the simulated skin is moved by the transmission component. This is used to switch the position of the needle hole on the rubber blood vessel, reduce the need for multiple needle punctures at the same position, and avoid the needle hole trajectory affecting the next injection practice. The components include an unordered component, a pressing component, and a triggering component. The unordered component is located on the end face of the pushing component, the pressing component is located on the side of the unordered component, and the triggering component is located inside the unordered component. The pressing component controls the operation of the unordered component, and the unordered component randomly triggers the triggering component for unordered trigger control. The system consists of an inflation component and a support component. The inflation component is connected to the rubber blood vessel, and the support component is located inside the simulation layer. The working positions of the inflation component and the support component are randomly and disorderly triggered by the trigger component, thereby randomly adjusting the diameter and protrusion state of the rubber blood vessel.

[0005] The transmission component includes a rack and pinion fixed to the side of the simulated skin. A gear is provided on the inner surface of the rack and pinion, and the gear meshes with the rack and pinion. A rotating rod is fixed inside the gear and one end of the rotating rod is rotatably connected to the surface of the simulated layer. Auxiliary plates are fixed on both sides of the simulated layer, and rotating beads are embedded in the surface of the auxiliary plates.

[0006] Among them, a turntable is fixed on the surface of the rotating rod, and a gear two is sleeved on the outside of the turntable. A slot is opened on the inner wall of the gear two, and an opening is opened inside the turntable. A clamping plate is rotatably connected to the inner wall of the opening.

[0007] The pushing component includes a rack plate 1 located at the bottom of the gear 2, and the rack plate 1 is fixed to the surface of the movable plate 1. The movable plate 1 is slidably connected to the inside of the base. A fixed plate 1 is fixed to the inner wall of the base, and a push rod 1 is inserted inside the fixed plate 1. One end of the push rod 1 is fixedly connected to the movable plate 1, and the other end of the push rod 1 is fixedly connected to the push plate 1. A spring 1 is sleeved on the outside of the push rod 1. One end of the spring 1 is fixed to the surface of the fixed plate 1, and the other end of the spring 1 is fixed to the push plate 1.

[0008] The disordered component includes a connecting seat 1 fixed to the surface of the base, and the connecting seat 1 has an operating cavity inside. The top of the connecting seat 1 is fixed with a placement port, the side of the connecting seat 1 is fixed with a connecting seat 2, and the side of the connecting seat 2 away from the connecting seat 1 is fixed with a ball outlet.

[0009] The operating cavity has a rotating plate rotatably connected to its inner wall, and the surface of the rotating plate is provided with disordered balls. The pressing assembly includes a rotating rod 2 fixed inside the rotating plate, and the two ends of the rotating rod 2 are rotatably connected to the inner wall of the operating cavity. A gear 3 is fixed to the outer wall of the rotating rod 2, and a rack plate 2 meshes with the side surface of the gear 3. The rack plate 2 is fixed to the surface of the moving rod, and the end face of the moving rod is fixed to the push plate 2. A spring 2 is fixed to the surface of the push plate 2, and the end face of the spring 2 is fixed to the surface of the connecting seat 1.

[0010] The triggering component includes a triggering cavity formed inside the connecting seat 2, and baffles 1 are uniformly fixed on the surface of the triggering cavity, with trigger switches 1 arranged sequentially between the baffles 1.

[0011] Among them, a fixing plate 2 is provided on the side of the baffle 1 away from the connecting seat 1, and a baffle 2 is fixed on one side of the surface of the fixing plate 2. A trigger switch 2 is provided at the tail of the baffle 2, and the trigger switch 2 is embedded in the interior of the fixing plate 2. A slot matching the ball outlet is opened inside the connecting seat 2.

[0012] The inflation assembly includes a support plate fixed to the inner wall of the rubber blood vessel, and the support plate is fixed to the surface of the inflation cylinder one. One end of the inflation cylinder one is connected to the connecting pipe one. A connecting pipe two is fixed to the side of the connecting pipe one. The end face of the connecting pipe two is connected to the airbag one. A lifting plate is provided at the bottom of the airbag one. The surface of the lifting plate is fixed with pressing teeth for pressing the airbag one. A threaded plate is fixed at the middle end of the lifting plate. A screw one is threadedly connected to the inside of the threaded plate. The bottom of the screw one is fixedly connected to the output shaft of the motor one.

[0013] The support assembly includes an airbag 2 located on the side of the rubber blood vessel, and a connecting pipe 3 fixed to one side of the bottom of the airbag 2. The end face of the connecting pipe 3 is connected to the air cylinder 2. An air chamber is opened inside the air cylinder 2, and a rubber plate is installed inside the air chamber. A push plate 3 is fixed to the end face of the rubber plate, and a screw 2 is threadedly connected inside the push plate 3. The end face of the screw 2 is fixedly connected to the output shaft of the motor 2.

[0014] The present invention has at least the following beneficial effects: By simulating the switching of needle hole positions on the skin surface, the needle hole trajectory is avoided from affecting the next injection practice. It can provide softness, elasticity and toughness that are closer to real human skin, making venipuncture training more realistic. When medical staff are conducting venipuncture training, the appropriate skin elasticity can allow them to better feel the changes in resistance when inserting the needle, thereby more accurately judging whether the puncture is successful. Different diameter blood vessels require different needle selection and puncture techniques. By randomly changing the diameter of the rubber blood vessels, medical staff can better simulate the real clinical environment. During training, medical staff can come into contact with rubber blood vessels of various diameters, just like facing patients of different ages and physical conditions in real medical work. This can improve their proficiency and confidence in actual intravenous injection operations.

[0015] By randomly changing the protrusion state of simulated blood vessels, the intravenous injection model can simulate various clinical situations. This allows medical staff to be exposed to a variety of vascular conditions during training, master the puncture techniques for different vascular protrusion situations, and reduce puncture errors in actual clinical operations. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the device structure of the present invention; Figure 2 This is a cross-sectional view of the structure of the present invention; Figure 3 This is a partial structural diagram of the transmission component of the present invention; Figure 4 This is a partial structural diagram of the driving component of the present invention; Figure 5 This is a partial structural schematic diagram of gear two of the present invention; Figure 6 This is a partial structural diagram of the disordered component and the pressing component of the present invention; Figure 7 This is a partial structural diagram of the disordered component and triggering component of the present invention; Figure 8 This is a partial structural diagram of the pressure-reducing component and the triggering component of the present invention; Figure 9 This is a partial structural diagram of the auxiliary plate and the inflation assembly of the present invention; Figure 10 This is a partial structural schematic diagram of the rubber blood vessel and air cylinder of the present invention; Figure 11 This is a partial structural schematic diagram of the inflatable component of the present invention; Figure 12 This is a partial structural diagram of the support component of the present invention.

[0017] In the diagram: 11. Base plate; 12. Simulation layer; 13. Simulation skin; 14. Rubber blood vessel; 15. Infusion tube; 2. Transmission assembly; 21. Rack and pinion belt; 22. Gear 1; 23. Rotating rod 1; 24. Turntable; 25. Gear 2; 26. Bayonet; 27. Clamping plate; 28. Opening; 29. ​​Auxiliary plate; 3. Pushing assembly; 31. Rack and pinion plate 1; 32. Moving plate 1; 33. Base; 34. Fixing plate 1; 35. Push rod 1; 36. Push plate 1; 37. Spring 1; 4. Disorder assembly; 41. Connecting seat 1; 42. Operating chamber; 43. Placement port; 44. Connecting seat 2; 45. Ball outlet; 46. Disordered ball; 47. Rotating plate; 5. Pressing assembly; 51. Rotating rod 2; 52. Gear 3 53. Rack plate II; 54. Moving rod; 55. Spring II; 56. Push plate II; 6. Trigger assembly; 61. Baffle I; 62. Trigger switch I; 63. Fixing plate II; 64. Stop bar; 65. Baffle II; 66. Trigger switch II; 67. Slot; 68. Trigger chamber; 7. Inflation assembly; 71. Support plate; 72. Inflation cylinder I; 73. Connecting pipe I; 74. Connecting pipe II; 75. Airbag I; 76. Lifting plate; 77. Pressing teeth; 78. Threaded plate; 79. Screw I; 8. Motor I; 9. Support assembly; 91. Airbag II; 92. Connecting pipe III; 93. Inflation cylinder II; 94. Air chamber; 95. Rubber plate; 96. Push plate III; 97. Screw II; 98. Motor II. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 Please see Figures 1 to 12 The present invention provides a technical solution: an intravenous injection training device, comprising: a base plate 11, a simulation layer 12 provided on the top of the base plate 11, a simulation skin 13 covering the outside of the simulation layer 12, a rubber blood vessel 14 provided inside the simulation layer 12, and the end face of the rubber blood vessel 14 connected to the infusion tube 15. It also includes: a transmission component 2 and a pushing component 3. The transmission component 2 is located on the side of the simulated skin 13, and the pushing component 3 is located on the side of the transmission component 2. The transmission component 2 is used to control the movement of the transmission component 2 and drive the simulated skin 13 to move. This is used to switch the position of the needle hole on the rubber blood vessel 14, reduce the need for multiple needle punctures at the same position, avoid the needle hole trajectory from affecting the next injection practice, and more closely resemble the softness, elasticity and toughness of real human skin, making the venipuncture training more realistic and allowing for a better feeling of the resistance changes during needle insertion. The components include a disordered component 4, a pressing component 5, and a triggering component 6. The disordered component 4 is located on the end face of the pushing component 3, the pressing component 5 is located on the side of the disordered component 4, and the triggering component 6 is located inside the disordered component 4. The pressing component 5 controls the operation of the disordered component 4, and the disordered component 4 randomly triggers the triggering component 6 for disordered trigger control, which allows medical staff to better simulate the real clinical environment. The inflation component 7 and the support component 9 are connected to the rubber blood vessel 14. The support component 9 is located inside the simulation layer 12. The working positions of the inflation component 7 and the support component 9 are randomly and disorderly triggered by the trigger component 6, thereby randomly adjusting the diameter and protrusion state of the rubber blood vessel 14, so that medical staff can be exposed to various vascular conditions during training.

[0020] The transmission component 2 includes a rack and pinion belt 21 fixed to the side of the simulated leather 13. A gear 22 is provided on the inner surface of the rack and pinion belt 21, and the gear 22 meshes with the rack and pinion belt 21. A rotating rod 23 is fixed inside the gear 22, and one end of the rotating rod 23 is rotatably connected to the surface of the simulated layer 12. Auxiliary plates 29 are fixed on both sides of the simulated layer 12, and rotating beads are embedded in the surface of the auxiliary plates 29. Through the design of the auxiliary plates 29 and the rotating beads, the transmission of the simulated leather 13 is assisted, making the movement of the simulated leather 13 smoother and more stable.

[0021] A turntable 24 is fixed to the surface of the rotating rod 23, and a gear 25 is sleeved on the outside of the turntable 24. A slot 26 is opened on the inner wall of the gear 25, and an opening 28 is opened inside the turntable 24. A retaining plate 27 is rotatably connected to the inner wall of the opening 28, which facilitates the unidirectional movement of the simulated skin 13 and prevents the simulated skin 13 from moving in the opposite direction and resetting. This facilitates the switching of the needle hole position on the surface of the simulated skin 13 and prevents the needle hole trajectory from affecting the next injection practice.

[0022] The pushing component 3 includes a rack plate 31 disposed at the bottom of the gear 25, and the rack plate 31 is fixed to the surface of the movable plate 32. The movable plate 32 is slidably connected to the inside of the base 33. A fixed plate 34 is fixed to the inner wall of the base 33, and a push rod 35 is inserted inside the fixed plate 34. One end of the push rod 35 is fixedly connected to the movable plate 32, and the other end of the push rod 35 is fixedly connected to the push plate 36. A spring 37 is sleeved on the outside of the push rod 35. One end of the spring 37 is fixed to the surface of the fixed plate 34, and the other end of the spring 37 is fixed to the push plate 36. By manually pushing the push plate 36 to move, the operation of the simulated skin 13 and the indirect triggering of the disordered ball 46 are indirectly realized, achieving synchronous operation, making the operation simpler and facilitating the movement of the simulated skin 13.

[0023] During training, the area of ​​the simulated skin 13 near the rubber blood vessel 14 will develop needle holes due to needle puncture. Upon reuse, the area near the needle holes may experience wear, hardening, or loss of elasticity. After the simulated skin 13 is moved, the area near the rubber blood vessel 14 becomes the unpunctured area, providing softness, elasticity, and resilience closer to real human skin, making venipuncture training more realistic. When medical staff perform venipuncture training, appropriate skin elasticity allows them to better feel changes in needle resistance, thus more accurately judging whether the puncture is successful. Furthermore, from a psychological perspective, the unpunctured simulated skin 13 area makes trainees feel more like they are operating on a real patient. This psychological suggestion helps trainees to perform venipuncture training more seriously and cautiously, improving their focus and sense of responsibility in actual clinical operations.

[0024] When the model is needed, firstly, press the push plate 36. The push plate 36 pushes the push rod 35 towards the base 33. At this time, the spring 37 is in a compressed and stored state. The push rod 35 passes through the fixed plate 34 and pushes the moving plate 32 to move synchronously. The moving plate 32 drives the rack plate 31 to move. The movement of the rack plate 31 causes the gear 25 to rotate clockwise. When the gear 25 rotates clockwise, the locking plate 27 presses against the inner wall of the locking slot 26, realizing the connection and locking between the gear 25 and the turntable 24. The rotation of the gear 25 drives the turntable 24 to rotate synchronously. The rotation of the turntable 24 drives the rotating rod 23 to rotate. The rotating rod 23 drives the gear 22 to rotate synchronously. When the gear 25 rotates clockwise, the gear 25 rotates clockwise. When wheel 22 rotates, it causes rack belt 21 to move, which in turn moves simulated leather 13, enabling the pinhole position switching operation. After releasing the pressure on push plate 36, spring 37 pushes push plate 36 to move away from base 33. Push plate 36 drives rack plate 31 to move via push rod 35 and moving plate 32. Rack plate 31 moves in the opposite direction, causing gear 25 to rotate counterclockwise. When gear 25 rotates counterclockwise, latch 26 pushes latch plate 27 into the opening 28, thus disconnecting gear 25 from turntable 24 and preventing simulated leather 13 from resetting after moving in the opposite direction, making the position adjustment of simulated leather 13 more stable.

[0025] The disordered component 4 includes a connecting seat 41 fixed to the surface of the base 33, and an operating cavity 42 is provided inside the connecting seat 41. A placement opening 43 is fixed to the top of the connecting seat 41, and a connecting seat 44 is fixed to the side of the connecting seat 41. A ball outlet 45 is fixed to the side of the connecting seat 44 away from the connecting seat 41 to facilitate the insertion and removal of the disordered ball 46. The bottom of the operating cavity 42 and the bottom of the inner wall of the connecting seat 44 are both designed to slope down, so that the disordered ball 46 can move down the slope to trigger the trigger switch 62 and the trigger switch 66.

[0026] A rotating plate 47 is rotatably connected to the inner wall of the operating cavity 42, and disordered balls 46 are provided on the surface of the rotating plate 47. The pressing assembly 5 includes a rotating rod 51 fixed inside the rotating plate 47, and both ends of the rotating rod 51 are rotatably connected to the inner wall of the operating cavity 42. A gear 52 is fixed to the outer wall of the rotating rod 51, and a rack plate 53 meshes with the side surface of the gear 52. The rack plate 53 is fixed to the surface of the moving rod 54, and the end face of the moving rod 54 is fixed to the push plate 56. A spring 55 is fixed to the surface of the push plate 56. The end face of 5 is fixed to the surface of the connecting seat 41. The push plate 56 is pushed by the moving plate 32, which indirectly realizes the rotation of the rotating rod 51, causing the rotating plate 47 to rotate, increasing the gap, and realizing the release of the limit of the disordered ball 46. The disordered ball 46 falls through the gap between the rotating plate 47 and the inner wall of the operating cavity 42. The movement of the moving plate 32 synchronously triggers the movement of the disordered ball 46, and the rotation angle of the rotating plate 47 is indirectly adjusted according to the movement distance of the moving plate 32, which is conducive to the disordered ball 46 randomly triggering the trigger switch 62.

[0027] The triggering component 6 includes a triggering cavity 68 formed inside the connecting seat 44, and baffles 61 are uniformly fixed on the surface of the triggering cavity 68. Trigger switches 62 are arranged sequentially between the baffles 61. Multiple paths are formed by the isolation of the baffles 61, so that the disordered ball 46 can pass through different paths, thereby triggering the trigger switches 62 in a disordered manner.

[0028] A fixing plate 63 is provided on the side of the baffle 61 away from the connecting seat 41, and a baffle bar 64 is fixed on one side of the surface of the fixing plate 63. A baffle 65 is fixed at the middle of the surface of the fixing plate 63. A trigger switch 66 is provided at the tail of the baffle 65 and is embedded in the inside of the fixing plate 63. The connecting seat 44 has a slot 67 that matches the ball outlet 45. Guided by the baffle bar 64, the movement path of the disordered ball 46 is randomly changed, so that the disordered ball 46 randomly falls into the path formed by the baffle 65, which facilitates the disordered ball 46 to randomly trigger the trigger switch 66. By randomly and disorderly triggering the trigger switch 62 and the trigger switch 66, the working position of the inflation component 7 and the support component 9 are controlled respectively, so as to randomly adjust the diameter of the rubber blood vessel 14 and the protruding shape of the rubber blood vessel 14.

[0029] By randomly changing the diameter of the rubber blood vessel 14, medical staff can better simulate the real clinical environment. During the training process, medical staff can come into contact with rubber blood vessels 14 of various diameters, just like facing patients of different ages and physical conditions in real medical work. This can improve their proficiency and confidence in actual intravenous injection operations.

[0030] By randomly changing the protrusion of simulated blood vessels, the intravenous injection model can simulate various clinical situations, allowing medical staff to be exposed to a variety of vascular conditions during training.

[0031] During the movement of the movable plate 32, the movable plate 32 moves to a side away from the fixed plate 34. The movable plate 32 pushes the push plate 56 to move. The push plate 56 drives the rack plate 53 to move synchronously through the movable rod 54. The movement of the rack plate 53 causes the gear 3 52 to rotate. The gear 3 52 drives the rotating rod 51 to rotate synchronously. The rotating rod 51 drives the rotating plate 47 to rotate. The rotation of the rotating plate 47 releases the limiting pressure on the disordered ball 46. The distance of the push plate 56 is adjusted according to the pushing distance of the push plate 36. For example, the shorter the moving distance of the push plate 56, the smaller the rotation angle of the rotating rod 51 is indirectly, and the smaller the rotation angle of the rotating plate 47 is. The trigger switch 62 is distributed in the first position, the second position and the third position from the direction near the tail of the rotating plate 47.

[0032] When the rotation angle of the rotating plate 47 is small, the disordered ball 46 is more likely to fall into the first position of the trigger switch 62 along the surface of the rotating plate 47. When the rotation angle of the rotating plate 47 is medium, the disordered ball 46 may fall into the first or second position. When the rotation angle of the rotating plate 47 is large, the disordered ball 46 may fall into the first, second, or third position, realizing the disordered pressing of the trigger switch 62. As the disordered ball 46 continues to fall, it is pressed by the stop lever 64 and... The ball 46 passes through the baffle 2 65 and presses against the trigger switch 2 66. The trigger switch 2 66 has three positions: first, second, and third. The ball 46 presses against the three positions in a disordered manner. Then, the ball 46 continues to fall and enters the ball outlet 45 through the slot 67. The operator takes out the ball 46 from the ball outlet 45 and puts it back into the operating cavity 42 through the placement port 43. The ball 46 is locked between the rotating plate 47 and the inner wall of the operating cavity 42, realizing the recycling of the ball 46.

[0033] Example 2 The inflation assembly 7 includes a support plate 71 fixed to the inner wall of the rubber blood vessel 14, and the support plate 71 is fixed to the surface of the first inflation cylinder 72. One end of the first inflation cylinder 72 is connected to the first connecting pipe 73. A second connecting pipe 74 is fixed to the side of the first connecting pipe 73. The end face of the second connecting pipe 74 is connected to the first airbag 75. A lifting plate 76 is provided at the bottom of the first airbag 75, and the surface of the lifting plate 76 is fixed with pressure teeth 77 for pressing against the first airbag 75. A middle section of the lifting plate 76 is fixed with... The threaded plate 78 has a screw 79 connected to its internal threads. The bottom of the screw 79 is fixedly connected to the output shaft of the motor 8. The airbag 75 is compressed to different degrees by the pressure teeth 77, causing different volumes of gas inside the airbag 75 to enter the interior of the air cylinder 72 through the connecting pipe 74 and the connecting pipe 73, thereby expanding the air cylinder 72 and causing it to exhibit different expansion states, thus achieving the diameter adjustment of the air cylinder 72.

[0034] Different blood vessel diameters require different needle selection and puncture techniques. When the simulated blood vessel diameter is small, medical staff need to select the appropriate needle size more precisely and carefully control the insertion angle and depth during puncture. For example, for thinner blood vessels, a finer needle, such as a 24G or 26G needle, may be needed, and the insertion angle may need to be shallower, generally around 15-30 degrees. For larger blood vessels, the insertion angle can be appropriately increased, such as 30-45 degrees. By randomly changing the blood vessel diameter for training, medical staff can master the puncture techniques for different blood vessel conditions, thereby improving their overall operational level.

[0035] When trigger switch 62 is pressed, different positions of trigger switch 62 control different working times of motor 8. Different working times of motor 8 drive screw 79 to rotate a different number of times. When screw 79 rotates, with the cooperation of the threads on the inner wall of threaded plate 78, lifting plate 76 moves upward. Lifting plate 76 drives pressing teeth 77 to move synchronously. Pressing teeth 77 press against airbag 75. After airbag 75 is compressed, the gas inside airbag 75 enters connecting pipe 73 through connecting pipe 2 74, and then enters the interior of air cylinder 72 through connecting pipe 73, causing air cylinder 72 to expand. The expansion of air cylinder 72 pushes rubber blood vessel 14 through support plate 71, causing rubber blood vessel 14 to expand and change its diameter. This allows for random adjustment of the diameter of multiple rubber blood vessels 14 based on the pressing of multiple positions of trigger switch 62, which is convenient for trainees to conduct random training and improves training effectiveness.

[0036] The support assembly 9 includes an airbag 91 disposed on the side of the rubber blood vessel 14, and a connecting tube 92 is fixed to one side of the bottom of the airbag 91. The end face of the connecting tube 92 is connected to an inflation cylinder 93. An air chamber 94 is opened inside the inflation cylinder 93, and a rubber plate 95 is disposed inside the air chamber 94. A push plate 96 is fixed to the end face of the rubber plate 95, and a screw 97 is threadedly connected inside the push plate 96. The end face of the screw 97 is fixedly connected to the output shaft of the motor 98. The gas inside the air chamber 94 is compressed by the rubber plate 95, so that the gas enters the airbag 91 through the connecting tube 92, thereby supporting the airbag 91. At this point, the pressure of the rubber blood vessel 14 on the simulated skin 13 changes. The higher the support distance of the second airbag 91, the lower the protrusion of the rubber blood vessel 14 from the simulated skin 13, and the less obvious the protrusion of the rubber blood vessel 14. The lower the support distance of the second airbag 91, the more obvious the protrusion of the rubber blood vessel 14. Training on blood vessels with different protrusion states can enhance the vascular positioning ability of medical staff. By training on a model with randomly changing vascular protrusion states, medical staff can improve the accuracy of puncture, master the puncture techniques for different vascular protrusion situations, and reduce puncture errors in actual clinical operations.

[0037] When trigger switch 2 66 is pressed, different positions of trigger switch 2 66 control different working times of motor 2 98. Different working times of motor 2 98 drive screw 2 97 to rotate a different number of times. When screw 2 97 rotates, push plate 3 96 moves with the help of the inner thread of push plate 3 96. Push plate 3 96 pushes rubber plate 95 to move. The movement of rubber plate 95 pushes the gas inside air chamber 94 to move. The gas enters the interior of airbag 2 91 through connecting pipe 3 92, realizing the inflating operation of airbag 2 91. The inflating of airbag 2 91 pushes the simulated skin 13, changing the distance between simulated layer 12 and simulated skin 13, randomly simulating different depths of rubber blood vessels 14. This allows trainees to adapt to venous conditions of different depths of blood vessels during training, enhancing their ability to cope with actual random situations and improving training effectiveness.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An intravenous injection training device, comprising: The bottom plate (11) is provided with a simulation layer (12) on the top, and the outside of the simulation layer (12) is sleeved with a simulation skin (13), the inside of the simulation layer (12) is provided with a rubber blood vessel (14), and the end surface of the rubber blood vessel (14) is connected with a transfusion tube (15); It is characterized in that: The transmission assembly (2) is arranged on the side edge of the simulation skin (13), the pushing assembly (3) is arranged on the side edge of the transmission assembly (2), the transmission assembly (2) is controlled to move through the pushing assembly (3), the simulation skin (13) is moved through the transmission assembly (2), the position of the needle hole above the rubber blood vessel (14) is switched, the same position is reduced for multiple needle puncture practices, and the needle hole track is avoided to affect the next injection practice; The disorder assembly (4), the pressing assembly (5) and the trigger assembly (6) are arranged on the end surface of the pushing assembly (3), the side edge of the disorder assembly (4), and the inside of the disorder assembly (4), the disorder assembly (4) is controlled to work through the pressing assembly (5), the trigger assembly (6) is randomly triggered through the disorder assembly (4), and the disorder type trigger control is used. The inflation assembly (7) is connected with the rubber blood vessel (14), and the support assembly (9) is arranged in the inside of the simulation layer (12), the working gear position of the inflation assembly (7) and the support assembly (9) is randomly triggered through the trigger assembly (6), so that the diameter of the rubber blood vessel (14) and the protruding state of the rubber blood vessel (14) are randomly adjusted.

2. The intravenous practice device of claim 1, wherein: The transmission assembly (2) includes a rack belt (21) fixed on the side edge of the simulation skin (13), the inner surface of the rack belt (21) is provided with a gear one (22), the gear one (22) is engaged with the rack belt (21), the inside of the gear one (22) is fixed with a rotating rod one (23), one end of the rotating rod one (23) is rotatably connected with the surface of the simulation layer (12), the both sides of the simulation layer (12) are fixed with auxiliary plates (29), and the surface of the auxiliary plate (29) is inlaid with rotating beads.

3. The intravenous practice device of claim 2, wherein: The surface of the rotating rod one (23) is fixed with a rotating disc (24), the outside of the rotating disc (24) is sleeved with a gear two (25), the inner wall of the gear two (25) is provided with a bayonet (26), the inside of the rotating disc (24) is provided with an opening (28), and the inner wall of the opening (28) is rotatably connected with a clamping plate (27).

4. The intravenous practice device of claim 3, wherein: The push assembly (3) includes a rack plate one (31) arranged at the bottom of the gear two (25), and the rack plate one (31) is fixed on the surface of the moving plate one (32), the moving plate one (32) is slidingly connected in the inside of the base (33), the inner wall of the base (33) is fixedly connected with the fixed plate one (34), and the inside of the fixed plate one (34) is inserted with the push rod one (35), one end of the push rod one (35) is fixedly connected with the moving plate one (32), the other end of the push rod one (35) is fixedly connected with the push plate one (36), the outside of the push rod one (35) is sleeved with the spring one (37), one end of the spring one (37) is fixed on the surface of the fixed plate one (34), and the other end of the spring one (37) is fixed on the push plate one (36).

5. The intravenous practice device of claim 4, wherein: The unordered assembly (4) includes a connecting seat one (41) fixed on the surface of the base (33), and an operation cavity (42) is arranged in the inside of the connecting seat one (41), and the top of the connecting seat one (41) is fixedly connected with the placing opening (43), and the side of the connecting seat one (41) is fixedly connected with the connecting seat two (44), and the side, away from the connecting seat one (41), of the connecting seat two (44) is fixedly connected with the ball outlet (45).

6. The intravenous practice device of claim 5, wherein: The inner wall of the operation cavity (42) is rotatably connected with the rotating plate (47), and the surface of the rotating plate (47) is provided with the unordered ball (46), the pressing assembly (5) includes a rotating rod two (51) fixed in the inside of the rotating plate (47), and the two ends of the rotating rod two (51) are rotatably connected with the inner wall of the operation cavity (42), the outer wall of the rotating rod two (51) is fixedly connected with the gear three (52), and the side surface of the gear three (52) is engaged with the rack plate two (53), the surface of the rack plate two (53) is fixed on the surface of the moving rod (54), the end surface of the moving rod (54) is fixed on the push plate two (56), the surface of the push plate two (56) is fixedly connected with the spring two (55), and the end surface of the spring two (55) is fixed on the surface of the connecting seat one (41).

7. The intravenous practice device of claim 5, wherein: The trigger assembly (6) includes a trigger cavity (68) arranged in the inside of the connecting seat two (44), and the surface of the trigger cavity (68) is uniformly fixed with the baffle one (61), and the baffle one (61) is sequentially provided with the trigger switch one (62).

8. The intravenous practice device of claim 7, wherein: The side, away from the connecting seat one (41), of the baffle one (61) is provided with the fixed plate two (63), one side of the surface of the fixed plate two (63) is fixedly connected with the blocking rod (64), the middle end of the surface of the fixed plate two (63) is fixedly connected with the baffle two (65), the tail of the baffle two (65) is provided with the trigger switch two (66), and the trigger switch two (66) is embedded in the inside of the fixed plate two (63), and the inside of the connecting seat two (44) is provided with the slot (67) matched with the ball outlet (45).

9. The intravenous practice device of claim 1, wherein: The inflation assembly (7) comprises a support plate (71) fixed to the inner wall of the rubber blood vessel (14), and the support plate (71) is fixed to the surface of an inflation cylinder (72), one end of the inflation cylinder (72) is connected with a connecting pipe (73), the side of the connecting pipe (73) is fixed with a connecting pipe (74), the end surface of the connecting pipe (74) is connected with a gas bag (75), the bottom of the gas bag (75) is provided with a lifting plate (76), and the surface of the lifting plate (76) is fixed with a pressing tooth (77) for pressing the gas bag (75), the middle end of the lifting plate (76) is fixed with a threaded plate (78), and the inside of the threaded plate (78) is threadedly connected with a screw rod (79), and the bottom of the screw rod (79) is fixedly connected with the output shaft of a motor (8).

10. The intravenous practice device of claim 1, wherein: The support assembly (9) comprises a gas bag (91) arranged on the side of the rubber blood vessel (14), and one side of the bottom of the gas bag (91) is fixedly connected with a connecting pipe (92), the end surface of the connecting pipe (92) is connected with an inflation cylinder (93), the inside of the inflation cylinder (93) is provided with a gas cavity (94), and the inside of the gas cavity (94) is provided with a rubber plate (95), the end surface of the rubber plate (95) is fixedly connected with a push plate (96), and the inside of the push plate (96) is threadedly connected with a screw rod (97), and the end surface of the screw rod (97) is fixedly connected with the output shaft of a motor (98).

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