Rotary bone marrow puncture needle resetting mechanism

Abstract

The invention discloses a rotary bone marrow puncture needle resetting mechanism, belongs to the technical field of medical instruments, and aims to solve the problems that the same bone marrow puncture needle is used, the surface of the bone marrow puncture needle is easy to pollute after the bone marrow puncture needle is used for many times, and students with injured hands are easy to have certain infection risks during bone marrow puncture training if the bone marrow puncture needle is not disinfected. The puncture needle comprises a connecting pipe, a fixing sleeve is movably installed at the bottom of the connecting pipe, a puncture needle body is in threaded connection with the position, close to the top, of an inner cavity of the connecting pipe, and a plurality of rocking wheels are fixedly installed at the position, close to the top, of the periphery of the connecting pipe and can reciprocate up and down under the action of a movable rod and a piston through rotation of a driving disc; and a disinfectant in the water tank can be pumped into the inner cavity of the cylinder and is sprayed out through the atomization spray head under communication of the water outlet pipe, so that the surface of the puncture needle main body can be disinfected, and harm caused in the subsequent use process is avoided.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically a rotary bone marrow aspiration needle repositioning mechanism. Background Technology

[0002] In hematology, many diseases require blood tests. When clinically diagnosing blood disorders, bone marrow aspiration is the most important and fundamental examination. Bone marrow smears aim to determine the degree of nucleated cell proliferation and calculate the percentage, morphology, number, and distribution of various cell types. Bone marrow biopsy involves taking a small, cylindrical piece of bone marrow tissue, approximately 0.5 to 1 centimeter long, for pathological examination; the extracted material retains the intact structure of the bone marrow tissue.

[0003] During bone marrow aspiration instruction, when the aspiration needle is used, it is usually stored in a retainer to prevent damage or injury to medical staff. When the next student performs a bone marrow aspiration, the same aspiration needle is used repeatedly. After multiple uses, the surface of the aspiration needle is easily contaminated. If it is not disinfected, students with hand injuries may be at risk of infection during bone marrow aspiration training.

[0004] To address the above issues, a rotating bone marrow aspiration needle repositioning mechanism is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a rotary bone marrow aspiration needle repositioning mechanism. By using this device, the problem mentioned above can be solved: when a student performs a bone marrow aspiration, the same bone marrow aspiration needle is used repeatedly, and the surface of the needle is easily contaminated after multiple uses. If it is not disinfected, students with hand injuries may be at risk of infection during bone marrow aspiration training.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rotary bone marrow aspiration needle repositioning mechanism, comprising a connecting tube, a fixing sleeve movably mounted at the bottom of the connecting tube, a puncture needle body threadedly connected to the inner cavity of the connecting tube near the top, several rocker wheels fixedly mounted on the outer periphery of the connecting tube near the top, a button fixedly mounted on the front side of the fixing sleeve near the bottom, U-shaped plates fixedly mounted on both sides of the inner cavity of the connecting tube, a transmission component provided at the top of one side of the U-shaped plate, a disinfection component provided in the inner cavity of one side of the U-shaped plate, a drying component provided in the inner cavity of one side of the U-shaped plate, a telescopic rod A fixedly mounted on the top of the U-shaped plate near the opposite side, the top of the telescopic rod A being fixedly connected to the puncture needle body, and a protective pad fixedly mounted at the bottom of the fixing sleeve.

[0007] Furthermore, a cross-shaped circular block is fixedly installed at the bottom of the connecting pipe near the left and right sides, and a cross-shaped circular groove is opened at the top of the fixing sleeve, with the cross-shaped circular blocks slidably connected to the cross-shaped circular groove.

[0008] Furthermore, the transmission assembly includes a connecting block fixedly installed on one side of the bottom of the puncture needle body and a circular block fixedly installed on one side of the connecting block near the bottom. A rectangular plate is fixedly installed on the top of one side of the U-shaped plate. A stop block A is fixedly installed on the front side of the rectangular plate near the bottom. A sliding block is movably installed on the front side of the rectangular plate near one side. A stop block B is provided on the other side of the sliding block. A first rectangular opening and a second rectangular opening are respectively opened on the top two sides of one side of the U-shaped plate. A rope is fixedly installed on the bottom of the sliding block. A winding roller is provided in the inner cavity of the fixed sleeve near the middle position, and the end of the rope is fixedly connected to the winding roller. A spring B is movably sleeved on the outer periphery of the rope near the top, and the top and bottom ends of the spring B are fixedly connected to the bottom of the sliding block and the U-shaped plate, respectively.

[0009] Furthermore, a groove is provided on the other side of the sliding block, and a telescopic rod B is fixedly installed on one side of the inner cavity of the groove. The end of the telescopic rod B is fixedly connected to the stop block B. A spring A is movably sleeved on the outer periphery of the telescopic rod B, and the two ends of the spring A are fixedly connected to one side of the inner cavity of the groove and the stop block B, respectively.

[0010] Furthermore, the disinfection assembly includes a drive disc located near the middle of the inner cavity of one side of the U-shaped plate. A connecting rod is fixedly installed on one side of the drive disc, and one end of the connecting rod is rotatably connected to the inner cavity sidewall of the fixed sleeve. A movable rod is movably installed near the bottom of the other side of the drive disc, and a piston is movably installed at the bottom end of the movable rod. A cylinder is fixedly installed near the bottom of the inner cavity of one side of the U-shaped plate, and the piston is slidably connected to the inner cavity of the cylinder. A water tank is fixedly installed at the bottom of the inner cavity of the other side of the U-shaped plate, and an atomizing nozzle is fixedly installed near the bottom of the opposite side of the U-shaped plate.

[0011] Furthermore, a torsion spring is movably sleeved on the outer periphery of the connecting rod near its end, and the two ends of the torsion spring are fixedly connected to the inner cavity sidewalls of the connecting rod and the fixed sleeve, respectively. A conduit is inserted into one side of the inner cavity of the water tank near the top, and the end of the conduit penetrates the inner cavity sidewall of the fixed sleeve and extends to the outer periphery. A cover is threaded onto the outer periphery of the conduit near the top. A water inlet pipe is inserted into the rear side of the water tank and the cylinder near the bottom. A water outlet pipe is inserted into the rear side of the atomizing nozzle near the middle position, and the front end of the water outlet pipe is inserted into the rear side of the cylinder near the bottom.

[0012] Furthermore, the drying assembly includes a T-shaped rod fixedly installed on the top of the piston, an air bladder fixedly installed on the top of the T-shaped rod, a fixing block fixedly installed on one side of the inner cavity of the U-shaped plate near the top, an air inlet pipe fixedly installed on the rear side of the air bladder near the top, an air outlet pipe fixedly installed on the rear side of the air bladder near the top, and the air outlet pipe is located directly below the air inlet pipe. An air ring is fixedly installed at the end of the air outlet pipe, and several through holes are opened at the bottom of the air ring. The two sides of the air ring are fixedly connected to the adjacent U-shaped plates respectively. A wiping ring is provided at the bottom of the air ring, and the two sides of the wiping ring are fixedly connected to the adjacent U-shaped plates respectively, and the wiping ring is located at the top of the atomizing nozzle.

[0013] Furthermore, a cavity is formed on the air ring, and a heating wire is fixedly installed at the bottom of the inner cavity.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The drive disc rotates and moves up and down under the action of the moving rod and piston, which can draw the disinfectant in the water tank into the inner cavity of the cylinder, and spray it out through the atomizing nozzle through the water outlet pipe, thereby disinfecting the surface of the puncture needle body and avoiding the harm caused by it in subsequent use.

[0016] 2. When the piston moves up and down, the air bladder can be compressed by the T-shaped rod fixed on the piston, and the gas in the air bladder can be discharged. The gas is then sprayed out through the air ring to dry the sterilized puncture needle body. In addition, the heating wire can be set to quickly dry the sterilized puncture needle body.

[0017] 3. By setting up a wiping ring to wipe the body of the sterilized puncture needle, the subsequent drying time is shortened. By setting several through holes on the top of the air ring, the wiping ring can be dried, improving the wiping effect of the wiping ring in the subsequent wiping. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a partial exploded view of the connecting pipe and fixing sleeve of the present invention;

[0020] Figure 3 This is a partial exploded view of the water inlet pipe and fixing sleeve of the present invention;

[0021] Figure 4 This is a schematic cross-sectional view of the present invention;

[0022] Figure 5 This is a partial rear sectional view of the present invention;

[0023] Figure 6 This is a partial front sectional view of the present invention;

[0024] Figure 7 This is an exploded view of the fixing sleeve, connecting tube, and cross block of the present invention;

[0025] Figure 8 For the present invention Figure 4 Enlarged view of point A in the middle;

[0026] Figure 9 For the present invention Figure 8 Enlarged view at point B in the middle;

[0027] Figure 10 For the present invention Figure 4 Enlarged view at point C;

[0028] Figure 11 For the present invention Figure 6 Enlarged view at point D;

[0029] Figure 12 For the present invention Figure 6 Enlarged view of point E in the middle.

[0030] In the diagram: 1. Connecting tube; 11. Cross-shaped circular block; 2. Fixing sleeve; 3. Puncture needle body; 4. Rocker wheel; 5. Button; 6. U-shaped plate; 7. Transmission assembly; 71. Connecting block; 72. Circular block; 73. Rectangular plate; 74. Stop block A; 75. Sliding block; 76. Stop block B; 761. Telescopic rod B; 762. Spring A; 77. Spring B; 78. Rope; 79. Rewinding roller; 8. Sterilization assembly; 81. 82. Drive plate; 83. Connecting rod; 84. Torsion spring; 85. Movable rod; 86. Piston; 87. Cylinder; 88. Water tank; 89. Conduit; 80. Inlet pipe; 81. Atomizing nozzle; 82. Outlet pipe; 93. Drying assembly; 94. T-shaped rod; 95. Airbag; 96. Fixing block; 97. Air outlet pipe; 98. Air ring; 99. Heating wire; 90. Wiping ring; 11. Telescopic rod A; 20. Protective pad. Detailed Implementation

[0031] 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.

[0032] To address the technical problem of the inability to sterilize reused puncture needles, which could easily lead to student infections, such as... Figure 1-12 As shown, the following preferred technical solutions are provided:

[0033] A rotary bone marrow aspiration needle repositioning mechanism includes a connecting tube 1. The front of the connecting tube 1 has graduations, and the inner cavity of the connecting tube 1 has internal threads. A fixing sleeve 2 is movably mounted on the bottom of the connecting tube 1. Both the connecting tube 1 and the fixing sleeve 2 are made of transparent material to facilitate observation of the movement of the puncture needle body 3. The puncture needle body 3 is threadedly connected to the inner cavity of the connecting tube 1 near the top. The outer circumference of the puncture needle body 3 has external threads. Several rocker wheels 4 are fixedly mounted on the outer circumference of the connecting tube 1 near the top, causing the connecting tube 1 to rotate. The front of the fixing sleeve 2 is near the bottom... A button 5 is fixedly installed at the part, which can control the heating wire 951 to start. U-shaped plates 6 are fixedly installed on both sides of the inner cavity of the connecting tube 1. A transmission component 7 is set on the top of one side of the U-shaped plate 6. A disinfection component 8 is set in the inner cavity of one side of the U-shaped plate 6. A drying component 9 is set in the inner cavity of one side of the U-shaped plate 6. A telescopic rod A10 is fixedly installed on the top of the U-shaped plate 6 near the opposite side. The top of the telescopic rod A10 is fixedly connected to the puncture needle body 3. A protective pad 20 is fixedly installed at the bottom of the fixing sleeve 2 for protection of the fixing sleeve 2.

[0034] A cross-shaped circular block 11 is fixedly installed at the bottom of the connecting pipe 1 near the left and right sides. A cross-shaped circular groove is opened at the top of the fixing sleeve 2, and the cross-shaped circular blocks 11 are slidably connected to the cross-shaped circular groove.

[0035] The transmission assembly 7 includes a connecting block 71 fixedly installed on one side of the bottom of the puncture needle body 3, and a circular block 72 fixedly installed on one side of the connecting block 71 near the bottom. A rectangular plate 73 is fixedly installed on one side of the top of the U-shaped plate 6. A stop block A74 is fixedly installed on the front side of the rectangular plate 73 near the bottom. A sliding block 75 is movably installed on the front side of the rectangular plate 73 near one side. A stop block B76 is provided on the other side of the sliding block 75. The circular block 72 and the stop block A74 are offset from each other and will not affect the circular block 72. The movement trajectory has a first rectangular opening and a second rectangular opening on the top two sides of the U-shaped plate 6 on one side. A rope 78 is fixedly installed at the bottom of the sliding block 75. A winding roller 79 is provided near the middle position of the inner cavity of the fixed sleeve 2, and the end of the rope 78 is fixedly connected to the winding roller 79. A spring B77 is movably sleeved on the outer periphery of the rope 78 near the top. In the normal state, the spring B77 is used to support the sliding block 75, and the top and bottom ends of the spring B77 are fixedly connected to the bottom of the sliding block 75 and the U-shaped plate 6, respectively.

[0036] A groove is provided on the other side of the sliding block 75. A telescopic rod B761 is fixedly installed on one side of the inner cavity of the groove. The end of the telescopic rod B761 is fixedly connected to the stop block B76. A spring A762 is movably sleeved on the outer periphery of the telescopic rod B761. The two ends of the spring A762 are fixedly connected to one side of the inner cavity of the groove and the stop block B76, respectively. The spring A762 can be used to reset the stop block B76.

[0037] The disinfection component 8 includes a drive disc 81 located near the center of the inner cavity of a U-shaped plate 6 on one side. A connecting rod 82 is fixedly installed on one side of the drive disc 81, and one end of the connecting rod 82 is rotatably connected to the inner wall of the fixed sleeve 2. A movable rod 83 is movably installed near the bottom of the other side of the drive disc 81, and a piston 84 is movably installed at the bottom of the movable rod 83. A cylinder 85 is fixedly installed near one side of the bottom of the inner cavity of the U-shaped plate 6 on one side, and the piston 84 is slidably connected to the inner cavity of the cylinder 85. The other U-shaped plate... A water tank 86 is fixedly installed at the bottom of the inner cavity of the 6. The front side of the water tank 86 is marked with scale lines. A misting nozzle 87 is fixedly installed on the opposite side of the U-shaped plate 6 near the bottom. The drive disc 81 can move up and down under the action of the movable rod 83 and the piston 84 by rotating. This allows the disinfectant in the water tank 86 to be drawn into the inner cavity of the cylinder 85 and sprayed out through the misting nozzle 87 via the water outlet pipe 871. This disinfects the surface of the puncture needle body 3 and avoids the harm caused during subsequent use.

[0038] A torsion spring 821 is movably sleeved on the outer periphery of the connecting rod 82 near its end. The two ends of the torsion spring 821 are fixedly connected to the inner cavity sidewall of the connecting rod 82 and the fixed sleeve 2, respectively. A conduit 861 is inserted into one side of the inner cavity of the water tank 86 near the top. The end of the conduit 861 penetrates the inner cavity sidewall of the fixed sleeve 2 and extends to the outer periphery. A cover is threaded onto the outer periphery of the conduit 861 near the top. A water inlet pipe 862 is inserted into the rear side of the water tank 86 and the cylinder 85 near the bottom. The water inlet pipe 862 is equipped with a one-way valve. A water outlet pipe 871 is inserted into the rear side of the atomizing nozzle 87 near the middle position. A one-way valve is installed on the water outlet pipe 871. The front end of the water outlet pipe 871 is inserted into the rear side of the cylinder 85 near the bottom.

[0039] To address the technical challenges of treating the surface of the puncture needle with disinfectant after sterilization, such as... Figure 4 , Figure 5 and Figure 6 As shown, the following preferred technical solutions are provided:

[0040] The drying assembly 9 includes a T-shaped rod 91 fixedly mounted on the top of the piston 84. An air bladder 92 is fixedly mounted on the top of the T-shaped rod 91. A fixing block 93 is fixedly mounted on one side of the inner cavity of the U-shaped plate 6 near the top. An air inlet pipe is fixedly mounted on the rear side of the air bladder 92 near the top, and a one-way valve is installed on the air inlet pipe. An air outlet pipe 94 is fixedly mounted on the rear side of the air bladder 92 near the top, and a one-way valve is installed on the outer periphery of the air outlet pipe 94. The air outlet pipe 94 is located directly below the air inlet pipe. An air ring 95 is fixedly mounted at the end of the air outlet pipe 94. Several through holes are opened at the bottom of the air ring 95. The through holes at the bottom of the air ring 95 are used for... For drying the wiping ring 96, the two sides of the air ring 95 are fixedly connected to the adjacent U-shaped plates 6 respectively. The bottom of the air ring 95 is provided with the wiping ring 96, and the two sides of the wiping ring 96 are fixedly connected to the adjacent U-shaped plates 6 respectively. The wiping ring 96 is located at the top of the atomizing nozzle 87. When the piston 84 moves up and down, the air bag 92 can be compressed by the T-shaped rod 91 fixed on the piston 84, and the gas in the air bag 92 can be discharged and sprayed out through the air ring 95 to dry the sterilized puncture needle body 3. In addition, the heating wire 951 can quickly dry the sterilized puncture needle body 3, which is convenient for subsequent use.

[0041] A cavity is provided on the air ring 95, and a heating wire 951 is fixedly installed at the bottom of the cavity to quickly dry the puncture needle body 3 and the wiping ring 96.

[0042] Working principle: When using the device, the fixing sleeve 2 is brought into contact with the human body model, so that the protective pad 20 fixed on the fixing sleeve 2 is in contact with the human body model. The student can hold the fixing sleeve 2 by hand. At this time, the connecting tube 1 can be rotated by the rocker wheel 4. The bottom of the connecting tube 1 slides on the fixing sleeve 2. When the connecting tube 1 rotates, the puncture needle body 3 can be moved downward under the limit of the two telescopic rods A10, and the puncture needle body 3 is inserted into the body of the model. Bone marrow fluid is extracted through the puncture needle body 3 to complete the bone marrow puncture operation. Afterwards, the connecting tube 1 is rotated in the opposite direction by the rocker wheel 4 to move the puncture needle body 3 upward, so as to prevent the needle tip of the puncture needle body 3 from being exposed and endangering the staff. When the puncture needle body 3 moves downward, the connecting block 71 fixed on the puncture needle body 3 also moves downward. When the puncture needle body 3 moves upward, the round block 72 fixed on the connecting block 71 can move the sliding block 75 upward under the action of the stop block B76. The winding roller 7 is connected by the rope 78 fixed on the sliding block 75. Rotation of the piston 84 causes the drive plate 81 to rotate. The movable rod 83, mounted on the drive plate 81, causes the piston 84 to move up and down within the cylinder 85, drawing disinfectant from the water tank 86 into the cylinder 85. This disinfectant is then sprayed out through the atomizing nozzle 87 via the outlet pipe 871, disinfecting the needle tip of the puncture needle body 3. As the puncture needle body 3 moves upward, the wiping ring 96 wipes its outer circumference. During this upward movement, the heating wire 951 within the air ring 95 can be activated via button 5. As the piston 84 moves upward, the T-shaped rod 91, fixed to the piston 84, moves upward in conjunction with the fixing block 93, compressing the airbag 92 and expelling the gas. This gas is then sprayed out through the air ring 95 to dry the disinfected puncture needle body 3. The heating wire 951 also allows for rapid drying of the disinfected puncture needle body 3 for future use.

[0043] 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.

[0044] 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. A rotary bone marrow aspiration needle repositioning mechanism, comprising a connecting tube (1), characterized in that: A fixing sleeve (2) is movably installed at the bottom of the connecting tube (1). A puncture needle body (3) is threadedly connected to the inner cavity of the connecting tube (1) near the top. Several rocker wheels (4) are fixedly installed on the outer periphery of the connecting tube (1) near the top. A button (5) is fixedly installed on the front side of the fixing sleeve (2) near the bottom. U-shaped plates (6) are fixedly installed on both sides of the inner cavity of the connecting tube (1). A transmission component (7) is provided on the top of one side of the U-shaped plate (6). A disinfection component (8) is provided in the inner cavity of one side of the U-shaped plate (6). A drying component (9) is provided in the inner cavity of one side of the U-shaped plate (6). A telescopic rod A (10) is fixedly installed on the top of the U-shaped plate (6) near the opposite side. The top of the telescopic rod A (10) is fixedly connected to the puncture needle body (3). A protective pad (20) is fixedly installed at the bottom of the fixing sleeve (2).

2. The rotary bone marrow aspiration needle repositioning mechanism according to claim 1, characterized in that: The bottom of the connecting pipe (1) is fixedly installed with cross-shaped circular blocks (11) near the left and right sides. The top of the fixing sleeve (2) is provided with a cross-shaped circular groove, and the cross-shaped circular blocks (11) are slidably connected to the cross-shaped circular groove.

3. The rotary bone marrow aspiration needle repositioning mechanism according to claim 1, characterized in that: The transmission assembly (7) includes a connecting block (71) fixedly installed on one side of the bottom of the puncture needle body (3) and a round block (72) fixedly installed on one side of the connecting block (71) near the bottom. A rectangular plate (73) is fixedly installed on one side of the top of the U-shaped plate (6). A stop block A (74) is fixedly installed on the front side of the rectangular plate (73) near the bottom. A sliding block (75) is movably installed on the front side of the rectangular plate (73) near one side. A stop block B (76) is provided on the other side of the sliding block (75). The top two sides of the U-shaped plate (6) on one side are respectively provided with a first rectangular opening and a second rectangular opening. The bottom of the sliding block (75) is fixedly installed with a rope (78). The inner cavity of the fixed sleeve (2) is provided with a winding roller (79) near the middle position. The end of the rope (78) is fixedly connected to the winding roller (79). The outer periphery of the rope (78) is movably sleeved with a spring B (77) near the top. The top and bottom ends of the spring B (77) are respectively fixedly connected to the bottom of the sliding block (75) and the U-shaped plate (6).

4. The rotary bone marrow aspiration needle repositioning mechanism according to claim 3, characterized in that: The sliding block (75) has a groove on the other side. A telescopic rod B (761) is fixedly installed on one side of the inner cavity of the groove. The end of the telescopic rod B (761) is fixedly connected to the stop block B (76). A spring A (762) is movably sleeved on the outer periphery of the telescopic rod B (761), and the two ends of the spring A (762) are fixedly connected to one side of the inner cavity of the groove and the stop block B (76) respectively.

5. The rotary bone marrow aspiration needle repositioning mechanism according to claim 1, characterized in that: The disinfection assembly (8) includes a drive disc (81) located near the middle of the inner cavity of a U-shaped plate (6) on one side. A connecting rod (82) is fixedly installed on one side of the drive disc (81). One end of the connecting rod (82) is rotatably connected to the inner cavity sidewall of the fixed sleeve (2). A movable rod (83) is movably installed near the bottom of the other side of the drive disc (81). A piston (84) is movably installed at the bottom end of the movable rod (83). A cylinder (85) is fixedly installed near one side of the bottom of the inner cavity of a U-shaped plate (6) on one side. The piston (84) is slidably connected to the inner cavity of the cylinder (85). A water tank (86) is fixedly installed at the bottom of the inner cavity of the U-shaped plate (6) on the other side. An atomizing nozzle (87) is fixedly installed near the bottom of the opposite side of the U-shaped plate (6).

6. The rotary bone marrow aspiration needle repositioning mechanism according to claim 5, characterized in that: A torsion spring (821) is movably sleeved on the outer periphery of the connecting rod (82) near its end. The two ends of the torsion spring (821) are fixedly connected to the inner cavity sidewall of the connecting rod (82) and the fixed sleeve (2), respectively. A conduit (861) is inserted into one side of the inner cavity of the water tank (86) near the top. The end of the conduit (861) penetrates the inner cavity sidewall of the fixed sleeve (2) and extends to the outer periphery. A cover is threaded on the outer periphery of the conduit (861) near the top. A water inlet pipe (862) is inserted into the rear side of the water tank (86) and the cylinder (85) near the bottom. A water outlet pipe (871) is inserted into the rear side of the atomizing nozzle (87) near the middle position. The front end of the water outlet pipe (871) is inserted into the rear side of the cylinder (85) near the bottom.

7. The rotary bone marrow aspiration needle repositioning mechanism according to claim 1, characterized in that: The drying assembly (9) includes a T-shaped rod (91) fixedly installed on the top of the piston (84), an airbag (92) fixedly installed on the top of the T-shaped rod (91), a fixing block (93) fixedly installed on one side of the inner cavity of the U-shaped plate (6) near the top, an air inlet pipe fixedly installed on the rear side of the airbag (92) near the top, an air outlet pipe (94) fixedly installed on the rear side of the airbag (92) near the top, and the air outlet pipe (94) is located directly below the air inlet pipe. An air ring (95) is fixedly installed at the end of the air outlet pipe (94). Several through holes are opened at the bottom of the air ring (95). The two sides of the air ring (95) are fixedly connected to the adjacent U-shaped plate (6) respectively. A wiping ring (96) is provided at the bottom of the air ring (95). The two sides of the wiping ring (96) are fixedly connected to the adjacent U-shaped plate (6) respectively, and the wiping ring (96) is located at the top of the atomizing nozzle (87).

8. The rotary bone marrow aspiration needle repositioning mechanism according to claim 7, characterized in that: A cavity is provided on the air ring (95), and a heating wire (951) is fixedly installed at the bottom of the inner cavity.

Images