Depth-adjustable bone marrow puncture needle assembly

Abstract

The invention relates to the technical field of puncture needle devices, in particular to a depth-adjustable bone marrow puncture needle assembly which comprises a mounting plate, a handle is fixedly connected to the upper end of the mounting plate, an assembly sleeve is fixedly connected to the outer side of the handle, and a sampling needle cylinder is arranged on the inner side of the assembly sleeve. Two groups of symmetrical first electric telescopic rods are mounted on the inner side of the handle, output shafts of the first electric telescopic rods are fixedly connected with a supporting plate, an adjusting mechanism is mounted at the upper end of the mounting plate and below the handle, the lower end of the mounting plate is fixedly connected with an assembling box, and the lower end of the assembling box is fixedly connected with a bottom plate; a disinfection mechanism is installed on the inner side of the assembly box, the disinfection mechanism comprises a liquid storage box installed on the inner side of the assembly box, through mutual cooperation of a first electric telescopic rod and a supporting plate, the position height of a puncture needle cylinder can be adjusted, the puncture needle cylinder is kept stable, and therefore the puncture needle cylinder is aligned to a sampling area, and angle deflection during puncture is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of puncture needle devices, in particular to a bone marrow puncture needle assembly with adjustable depth. Background Art

[0002] The bone marrow puncture needle is a special tool for bone marrow puncture. It is mainly used to collect bone marrow fluid for various clinical examinations. It is an important medical tool and plays a key role in the diagnosis and treatment of blood diseases. The bone marrow fluid samples collected by the bone marrow puncture needle can provide doctors with accurate diagnostic basis and treatment plans.

[0003] The existing bone marrow puncture needle will produce some bone chips when penetrating the bone. Therefore, when the sampling needle is used for sampling, it may be blocked by bone chips if the operation is improper. The broken bone chips may enter the gap and block the needle eye, resulting in the inability to extract bone marrow fluid, thus causing the bone marrow puncture to fail. There is a certain period of time between the puncture needle and its use after disinfection. During this period of time, the puncture needle is very likely to be contaminated by bacteria due to improper storage, affecting the use effect. After sampling, if the skin around the sampling area is not disinfected in time, the risk of infection of the wound will increase. For this reason, we propose a bone marrow puncture needle assembly with adjustable depth. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background art, the present invention proposes a bone marrow puncture needle assembly with adjustable depth.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a bone marrow puncture needle assembly with adjustable depth includes a mounting plate, the upper end of the mounting plate is fixedly connected to a handle, the outer side of the handle is fixedly connected to an assembly sleeve, the inner side of the assembly sleeve is provided with a sampling syringe, two groups of symmetrical first electric telescopic rods are installed on the inner side of the handle, the output shaft of the first electric telescopic rod is fixedly connected to a support plate, an adjustment mechanism is installed below the handle at the upper end of the mounting plate, the lower end of the mounting plate is fixedly connected to an assembly box, the lower end of the assembly box is fixedly connected to a bottom plate, a disinfection mechanism is installed on the inner side of the assembly box, and the disinfection mechanism includes a liquid storage tank installed on the inner side of the assembly box.

[0006] Preferably, the adjustment mechanism includes an L-shaped plate fixedly connected to the assembly box, a motor is installed on the upper end of the L-shaped plate, the lower end of the L-shaped plate is rotatably connected to the first feeding tube, the output shaft of the motor is fixedly connected to the first feeding tube, the outer side of the first feeding tube is fixedly connected to the first gear, the outer side of the first gear is meshingly connected to the second gear, the lower end of the second gear is fixedly connected to the threaded sleeve, the upper end of the threaded sleeve is provided with a sealing gasket, and the upper end of the threaded sleeve is movably connected to the sampling syringe.

[0007] Preferably, the outer side of the threaded sleeve is threadedly connected to a third gear, the outer side of the third gear is rotatably connected to a first synchronous belt, the inner side of the first synchronous belt is rotatably connected to a fourth gear, the inner side of the fourth gear is fixedly connected to the first discharge pipe, and the lower end of the threaded sleeve is fixedly connected to a puncture needle.

[0008] Preferably, the outer side of the puncture needle penetrates the bottom plate, and a second electric telescopic rod is installed on the inner wall of the puncture needle, the output shaft of the second electric telescopic rod is fixedly connected to a fixed sleeve, the inner side of the fixed sleeve is rotatably connected to a sampling needle, the outer side of the sampling needle is slidably connected to a buffer cylinder, the buffer cylinder is arranged on the inner side of a threaded sleeve, and the inner side of the buffer cylinder is movably connected to the output port of the sampling syringe.

[0009] Preferably, a slide groove is provided on the inner wall of the puncture needle barrel, and the slide groove is designed as an inclined surface. A slide rod is slidably connected to the inner side of the slide groove, and one end of the slide rod is fixedly connected to the sampling needle.

[0010] Preferably, the inner wall of the puncture needle barrel is fixedly connected with two groups of symmetrical L-shaped fixing rods, the inner side of the L-shaped fixing rod is slidably connected with an L-shaped pull rod, the upper end of the L-shaped pull rod is fixedly connected with a limiting block, the limiting block is slidably connected to the inner side of the L-shaped fixing rod, the angle of the L-shaped pull rod is slidably connected to the lower end of the sampling needle, and a first spring is provided on the inner side of the L-shaped fixing rod, one end of the first spring is fixedly connected to the L-shaped fixing rod, and the other end of the first spring is fixedly connected to the limiting block.

[0011] Preferably, the outer side of the first feeding pipe passes through the assembly box and the bottom plate, the outer side of the first feeding pipe is rotatably connected to the liquid storage tank, the inner side of the liquid storage tank on the outer side of the first feeding pipe is fixedly connected with two groups of blades, the outer side of the motor is rotatably connected with a sealing sleeve, the lower end of the sealing sleeve is fixedly connected to the liquid storage tank, the outer side of the sealing sleeve is provided with a first discharge hole, the inner side of the sealing sleeve on the outer side of the first feeding pipe is provided with a first feed hole, the lower end of the first feeding pipe is provided with a discharge port, and the lower end of the first feeding pipe is fixedly connected with a filter plate.

[0012] Preferably, a fifth gear is fixedly connected below the outer bottom plate of the first discharge pipe, the outer side of the fifth gear is rotatably connected to a second synchronous belt, the inner side of the second synchronous belt is rotatably connected to four sets of fixed rotating shafts, the upper ends of the fixed rotating shafts are rotatably connected to the bottom plate through the rotating shafts, the lower end of the second synchronous belt is fixedly connected to a cleaning rod, and the cleaning rod is designed with an adsorption material.

[0013] Preferably, a sealing rod is fixedly connected to the inner side of the liquid storage tank, a second discharge hole is opened on the outer side of the sealing rod, an output pipe is slidably connected to the inner side of the sealing rod, a second feed hole is opened on the outer side of the output pipe, the outer side of the output pipe passes through the bottom plate, an annular pressure plate is fixedly connected to the lower end of the output pipe, the inner side of the annular pressure plate is hollowed out, a drainage groove is arranged at the lower end of the annular pressure plate, and a cleaning cotton is arranged at the lower end of the annular pressure plate.

[0014] Preferably, the upper end of the annular pressure plate is fixedly connected to the output shafts of four groups of third electric telescopic rods, and the outer shells of the four groups of third electric telescopic rods are fixedly connected to the bottom plate.

[0015] Compared with the prior art, the present invention provides a bone marrow puncture needle assembly with adjustable depth, which has the following beneficial effects: 1. Through the cooperation between the threaded sleeve and the third gear, the puncture needle can rotate when moving downward, so as to perform bone marrow puncture. Compared with the conventional method, this structure can directly perform the puncture procedure without the need for additional disassembly of the motor. Through the cooperation between the first electric telescopic rod and the support plate, the puncture needle can adjust the position height and maintain stability, so that the puncture needle is aligned with the sampling area to avoid angle deviation during puncture.

[0016] 2. Through the cooperation between the second electric telescopic rod and the sampling needle, the sampling needle can adjust its depth according to different physiques. Through the cooperation between the sliding rod and the sliding groove, the sampling needle can rotate when sampling downward. The downward rotation of the sampling needle has obvious advantages in reducing the pain of the patient and reducing the damage to the vascular endothelium. Then, it rubs with the L-shaped pull rod. The L-shaped pull rod can clean the input port of the sampling needle through friction when the sampling needle moves downward, avoiding the sampling needle being blocked by bone chips during sampling, thereby improving the sampling efficiency.

[0017] 3. Through the cooperation between the sealing sleeve and the first discharge hole, the first discharge pipe can output alcohol, wet the cleaning rod and disinfect the human epidermis. Through the cooperation between the fifth gear and the fixed shaft, the cleaning rod can be rotated to fully disinfect the outside of the puncture needle tube, thereby preventing cross infection, reducing infection risks, improving diagnostic accuracy, ensuring patient safety and complying with medical standards. 4. Through the cooperation between the sealing rod and the output tube, the output tube can output alcohol to wet the cleaning cotton. Through the cooperation between the third electric telescopic rod and the annular pressing plate, the annular pressing plate can squeeze the cleaning cotton to exude alcohol. After sampling, the surrounding area of ​​the sampling area can be disinfected, which can effectively kill bacteria and reduce the risk of infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the overall structure of the depth-adjustable bone marrow puncture needle assembly proposed by the present invention; Figure 2 A schematic cross-sectional view of the overall structure of the depth-adjustable bone marrow puncture needle assembly proposed by the present invention Figure 1 ; Figure 3 A schematic cross-sectional view of the overall structure of the depth-adjustable bone marrow puncture needle assembly proposed by the present invention Figure 2 ; Figure 4 A schematic cross-sectional view of the overall structure of the depth-adjustable bone marrow puncture needle assembly proposed by the present invention Figure 3 ; Figure 5 The bone marrow puncture needle assembly with adjustable depth proposed by the present invention Figure 4 A schematic diagram of the structure enlargement of part A; Figure 6 The bone marrow puncture needle assembly with adjustable depth proposed by the present invention Figure 4 A schematic diagram of the structure of part B in the middle is enlarged; Figure 7 A schematic cross-sectional view of a partial structure of an adjustment mechanism of a depth-adjustable bone marrow puncture needle assembly proposed by the present invention; Figure 8 This is a schematic cross-sectional view of the overall structure of the disinfection mechanism of the bone marrow puncture needle assembly with adjustable depth proposed by the present invention; Fig. 9 The bone marrow puncture needle assembly with adjustable depth proposed by the present invention Figure 8 The enlarged schematic diagram of the structure of part C in the middle; Fig.10 This is a bottom view schematic diagram of the partial structure of the disinfection mechanism of the bone marrow puncture needle assembly with adjustable depth proposed by the present invention.

[0019] In the figure: 1, mounting plate; 2, handle; 3, assembly sleeve; 4, sampling syringe; 5, first electric telescopic rod; 6, support plate; 7, assembly box; 8, adjustment mechanism; 81, L-shaped plate; 82, motor; 83, first feeding pipe; 84, first gear; 85, second gear; 86, threaded sleeve; 87, sealing pad; 88, third gear; 89, first synchronous belt; 810, fourth gear; 811, puncture syringe; 812, second electric telescopic rod; 813, fixed sleeve; 814, sampling needle; 815, buffer cylinder; 816, slide rod; 817, slide groove; 81 8. L-shaped fixing rod; 819. L-shaped pulling rod; 820. limiting block; 821. first spring; 822. blade; 823. discharge port; 824. sealing sleeve; 825. first discharge hole; 826. first feed hole; 827. filter plate; 828. fifth gear; 829. second synchronous belt; 830. fixed rotating shaft; 831. cleaning rod; 9. disinfection mechanism; 91. liquid storage tank; 92. sealing rod; 93. second discharge hole; 94. output pipe; 95. second feed hole; 96. annular pressure plate; 97. third electric telescopic rod; 98. cleaning cotton; 10. bottom plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] See also Figure 1-Figure 10 A bone marrow puncture needle assembly with adjustable depth includes a mounting plate 1, a handle 2 is fixedly connected to the upper end of the mounting plate 1, an assembly sleeve 3 is fixedly connected to the outer side of the handle 2, a sampling syringe 4 is arranged on the inner side of the assembly sleeve 3, two sets of symmetrical first electric telescopic rods 5 are installed on the inner side of the handle 2, the output shaft of the first electric telescopic rod 5 is fixedly connected to a support plate 6, an adjustment mechanism 8 is installed below the handle 2 at the upper end of the mounting plate 1, an assembly box 7 is fixedly connected to the lower end of the mounting plate 1, a bottom plate 10 is fixedly connected to the lower end of the assembly box 7, a disinfection mechanism 9 is installed on the inner side of the assembly box 7, and the disinfection mechanism 9 includes a liquid storage tank 91 installed on the inner side of the assembly box 7.

[0022] In this embodiment, the adjustment mechanism 8 includes an L-shaped plate 81 fixedly connected to the assembly box 7, a motor 82 is installed at the upper end of the L-shaped plate 81, and the lower end of the L-shaped plate 81 is rotatably connected to the first discharge pipe 83, the output shaft of the motor 82 is fixedly connected to the first discharge pipe 83, the outer side of the first discharge pipe 83 is fixedly connected to the first gear 84, the outer side of the first gear 84 is meshingly connected to the second gear 85, the lower end of the second gear 85 is fixedly connected to the threaded sleeve 86, the upper end of the threaded sleeve 86 is provided with a sealing gasket 87, and the upper end of the threaded sleeve 86 is movably connected to the sampling syringe 4.

[0023] Specifically, the L-shaped plate 81 provides an installation space for the motor 82, the motor 82 drives the first discharge pipe 83 to rotate, the first discharge pipe 83 drives the first gear 84 to rotate, the first gear 84 drives the second gear 85 to rotate, the second gear 85 drives the threaded sleeve 86 to rotate, and the sealing gasket 87 protects the air pressure sealing inside the threaded sleeve 86 to prevent blood from overflowing.

[0024] In this embodiment, the outer side of the threaded sleeve 86 is threadedly connected to the third gear 88, the outer side of the third gear 88 is rotatably connected to the first synchronous belt 89, the inner side of the first synchronous belt 89 is rotatably connected to the fourth gear 810, the inner side of the fourth gear 810 is fixedly connected to the first discharge pipe 83, and the lower end of the threaded sleeve 86 is fixedly connected to the puncture needle 811.

[0025] Specifically, the first discharge pipe 83 drives the fourth gear 810 to rotate, and the fourth gear 810 drives the third gear 88 to rotate through the first synchronous belt 89. The third gear 88 is connected to the threaded sleeve 86 for counter-rotation through a thread, so that the threaded sleeve 86 moves downward when rotating. The height of the first gear 84 can always be engaged with the second gear 85, and the threaded sleeve 86 drives the puncture needle 811 to rotate and move downward, so that the puncture needle 811 penetrates the skin.

[0026] In this embodiment, the outer side of the puncture syringe 811 passes through the base plate 10, and a second electric telescopic rod 812 is installed on the inner wall of the puncture syringe 811. The output shaft of the second electric telescopic rod 812 is fixedly connected to a fixed sleeve 813. The inner side of the fixed sleeve 813 is rotatably connected to a sampling needle 814. The outer side of the sampling needle 814 is slidably connected to a buffer cylinder 815. The buffer cylinder 815 is arranged on the inner side of the threaded sleeve 86, and the inner side of the buffer cylinder 815 is movably connected to the output port of the sampling syringe 4.

[0027] Specifically, the second electric telescopic rod 812 is started, and the output shaft of the second electric telescopic rod 812 drives the fixed sleeve 813 to adjust the depth. The buffer cylinder 815 is used for connecting the sampling syringe 4 and the sampling needle 814.

[0028] In this embodiment, a slide groove 817 is provided on the inner wall of the puncture needle barrel 811 . The slide groove 817 is designed as an inclined surface. A slide rod 816 is slidably connected to the inner side of the slide groove 817 . One end of the slide rod 816 is fixedly connected to the sampling needle 814 .

[0029] Specifically, the fixed sleeve 813 drives the sampling needle 814 to move downward, and when the sampling needle 814 moves downward, it drives the slide rod 816 to slide in the slide groove 817. The inclined surface design of the slide groove 817 allows the sampling needle 814 to rotate when moving downward, thereby speeding up the entry speed, reducing the patient's pain, and reducing vascular endothelial damage.

[0030] In this embodiment, the inner wall of the puncture syringe 811 is fixedly connected with two groups of symmetrical L-shaped fixing rods 818, and the inner side of the L-shaped fixing rod 818 is slidably connected with an L-shaped pull rod 819. The upper end of the L-shaped pull rod 819 is fixedly connected with a limiting block 820, and the limiting block 820 is slidably connected to the inner side of the L-shaped fixing rod 818. The angle of the L-shaped pull rod 819 is slidably connected to the lower end of the sampling needle 814. A first spring 821 is arranged on the inner side of the L-shaped fixing rod 818, and one end of the first spring 821 is fixedly connected to the L-shaped fixing rod 818, and the other end of the first spring 821 is fixedly connected to the limiting block 820.

[0031] Specifically, when the sampling needle 814 moves downward, it drives the L-shaped pull rod 819 to move downward in the L-shaped fixed rod 818. The limit block 820 limits the moving range of the L-shaped pull rod 819. When the L-shaped pull rod 819 moves, the first spring 821 is pulled open, so that when the sampling needle 814 rotates, the L-shaped pull rod 819 always hooks the lower end of the sampling needle 814 and slides in connection, so that when the sampling needle 814 enters the bone marrow cavity, it can avoid blockage by bone chips generated by the puncture syringe 811.

[0032] In this embodiment, the outer side of the first feed pipe 83 passes through the assembly box 7 and the bottom plate 10, the outer side of the first feed pipe 83 is rotatably connected to the liquid storage tank 91, the outer side of the first feed pipe 83 is fixedly connected to the inside of the liquid storage tank 91 with two groups of blades 822, the outer side of the motor 82 is rotatably connected to a sealing sleeve 824, the lower end of the sealing sleeve 824 is fixedly connected to the liquid storage tank 91, the outer side of the sealing sleeve 824 is provided with a first discharge hole 825, the outer side of the first feed pipe 83 is provided with a first feed hole 826, the lower end of the first feed pipe 83 is provided with a discharge port 823, and the lower end of the first feed pipe 83 is fixedly connected to a filter plate 827.

[0033] Specifically, when the first discharge pipe 83 rotates, it drives the blades 822 to stir the alcohol in the liquid storage tank 91 to prevent sedimentation. When the first discharge pipe 83 rotates, the first discharge hole 825 on the outer side of the sealing sleeve 824 is aligned with the first feed hole 826, so that the alcohol in the liquid storage tank 91 passes through the first discharge hole 825 and enters the first feed hole 826 and is then output through the discharge port 823. The filter plate 827 filters the lower end opening of the first discharge pipe 83 to prevent blood stains or impurities from entering the first discharge pipe 83.

[0034] In this embodiment, a fifth gear 828 is fixedly connected below the outer bottom plate 10 of the first discharge pipe 83, the outer side of the fifth gear 828 is rotatably connected to a second synchronous belt 829, the inner side of the second synchronous belt 829 is rotatably connected to four sets of fixed rotating shafts 830, the upper end of the fixed rotating shaft 830 is rotatably connected to the bottom plate 10 through the rotating shaft, and the lower end of the second synchronous belt 829 is fixedly connected to a cleaning rod 831, which is designed for adsorption material.

[0035] Specifically, the first discharge pipe 83 drives the fifth gear 828 to rotate, and the fifth gear 828 cooperates with the fixed rotating shaft 830 to drive the second synchronous belt 829 to rotate. When the second synchronous belt 829 rotates, it drives the cleaning rod 831 to rotate, and alcohol moistens the cleaning rod 831. When the puncture syringe 811 moves downward, the inner side of the cleaning rod 831 contacts and rubs against the outer side of the puncture syringe 811, thereby performing comprehensive disinfection.

[0036] In this embodiment, a sealing rod 92 is fixedly connected to the inner side of the liquid storage tank 91, a second discharge hole 93 is opened on the outer side of the sealing rod 92, an output pipe 94 is slidably connected to the inner side of the sealing rod 92, a second feed hole 95 is opened on the outer side of the output pipe 94, the outer side of the output pipe 94 passes through the bottom plate 10, and an annular pressure plate 96 is fixedly connected to the lower end of the output pipe 94, the inner side of the annular pressure plate 96 is hollowed out, a drainage groove is provided at the lower end of the annular pressure plate 96, and a cleaning cotton 98 is provided at the lower end of the annular pressure plate 96.

[0037] Specifically, when the annular pressure plate 96 moves, it drives the output tube 94 to move. The output tube 94 slides in the sealing rod 92 to align the second discharge hole 93 with the second feed hole 95. The alcohol in the liquid storage tank 91 passes through the second discharge hole 93 and the second feed hole 95 and then enters the output tube 94, and then flows into the annular pressure plate 96 through the output tube 94. The alcohol in the annular pressure plate 96 is diverted through the drainage groove along the lower end of the annular pressure plate 96 and wets the cleaning cotton 98. When the output shaft of the output tube 94 continues to move downward, the cleaning cotton 98 adheres to the human epidermis and is squeezed outward by the alcohol, thereby sterilizing and disinfecting the surrounding area, and preventing the surrounding bacteria from extending to the sampling area through the blocking of the cleaning cotton 98.

[0038] In this embodiment, the upper end of the annular pressure plate 96 is fixedly connected to the output shafts of four groups of third electric telescopic rods 97 , and the outer shells of the four groups of third electric telescopic rods 97 are fixedly connected to the bottom plate 10 .

[0039] Specifically, the third electric telescopic rod 97 acts as kinetic energy to drive the annular pressure plate 96 to adjust.

[0040] Working principle: when in use, grab the handle 2, then move the puncture needle 811 to the top of the sampling area, then hold the handle 2 and move it downward to make the support plate 6 fit the waist of the human body, then start the first electric telescopic rod 5 to adjust the position of the mounting plate 1, so that the puncture needle 811 is aligned and in contact with the sampling area, and after sterilizing the sampling area, start the motor 82 installed on the upper end of the L-shaped plate 81, the motor 82 drives the first feeding tube 83 to rotate, the first feeding tube 83 drives the first gear 84 to rotate, the first gear 84 drives the second gear 85 to rotate, and the second gear 85 drives the threaded sleeve 8 6 rotates, the first feeding tube 83 drives the fourth gear 810 to rotate, the fourth gear 810 drives the third gear 88 to rotate through the first synchronous belt 89, the third gear 88 is connected to the threaded sleeve 86 through a thread to rotate in a counter-rotating manner, so that the threaded sleeve 86 moves downward when rotating, the height of the first gear 84 can always be meshed with the second gear 85, the threaded sleeve 86 drives the puncture needle 811 to rotate and move downward, so that the puncture needle 811 pierces the skin, the bone surface, and finally enters the bone marrow cavity, and then the second electric telescopic rod 812 is started, and the output shaft of the second electric telescopic rod 812 is driven by the second electric telescopic rod 812. The fixed sleeve 813 is driven to move downward, and the fixed sleeve 813 drives the sampling needle 814 to move downward. When the sampling needle 814 moves downward, it drives the slide bar 816 to slide in the slide groove 817. The inclined surface design of the slide groove 817 allows the sampling needle 814 to rotate when it moves downward. Compared with the traditional straight up and down method, the rotation of the sampling needle 814 downward speeds up the entry speed, relieves the patient's pain, and reduces the damage to the vascular endothelium. When the sampling needle 814 moves downward, it drives the L-shaped pull rod 819 to move downward in the L-shaped fixed rod 818, and the limit block 820 limits the movement of the L-shaped pull rod 819. The L-shaped pull rod 819 pulls the first spring 821 when it moves, so that when the sampling needle 814 rotates, the L-shaped pull rod 819 always hooks the lower end of the sampling needle 814 and slides to connect, so that when the sampling needle 814 enters the bone marrow cavity, it can avoid being blocked by bone chips generated by the puncture syringe 811. The sampling needle 814 reaches the specified position after adjusting the depth through the second electric telescopic rod 812, and the sampling syringe 4 is placed in the assembly sleeve 3, and then docked with the sealing gasket 87. The lower end input port of the sampling syringe 4 is clamped with the buffer cylinder 815, and then the sampling syringe 4 is pulled to extract; The first discharge pipe 83 drives the fifth gear 828 to rotate, and the fifth gear 828 cooperates with the fixed shaft 830 to drive the second synchronous belt 829 to rotate. When the second synchronous belt 829 rotates, it drives the cleaning rod 831 to rotate. When the first discharge pipe 83 rotates, it drives the blade 822 to stir the alcohol in the liquid storage tank 91 to avoid sedimentation. When the first discharge pipe 83 rotates, the first discharge hole 825 on the outer side of the sealing sleeve 824 is aligned with the first feed hole 826, so that the alcohol in the liquid storage tank 91 passes through the first discharge hole 82 5 enters the first feed hole 826 and then outputs through the discharge port 823, and then the alcohol wets the cleaning rod 831. When the puncture needle cylinder 811 moves downward, the inner side of the cleaning rod 831 contacts and rubs against the outer side of the puncture needle cylinder 811, thereby performing comprehensive disinfection. When the puncture needle cylinder 811 is reset, it moves upward. The cleaning rod 831 can also absorb and clean the blood stains on the outer side of the puncture needle cylinder 811 by rotating. The filter plate 827 filters the lower end opening of the first discharge pipe 83 to prevent blood stains or impurities from entering the first discharge pipe 83; After the sampling is completed, the third electric telescopic rod 97 is started, and the third electric telescopic rod 97 drives the annular pressure plate 96 to move downward, and the annular pressure plate 96 drives the output tube 94 to move downward, and the output tube 94 slides in the sealing rod 92 to align the second discharge hole 93 with the second feed hole 95. The alcohol in the liquid storage tank 91 passes through the second discharge hole 93 and the second feed hole 95 and enters the output tube 94, and then flows into the annular pressure plate 96 through the output tube 94. The alcohol in the annular pressure plate 96 is diverted through the drainage groove along the lower end of the annular pressure plate 96 and wets the cleaning cotton 98. When the output shaft of the output tube 94 continues to move downward, the cleaning cotton 98 adheres to the human epidermis and is squeezed outward by the alcohol, thereby sterilizing and disinfecting the surrounding area, and preventing the surrounding bacteria from extending to the sampling area through the blocking of the cleaning cotton 98.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A depth-adjustable bone marrow puncture needle assembly, comprising a mounting plate (1), characterized in that: The upper end of the mounting plate (1) is fixedly connected to a handle (2), the outer side of the handle (2) is fixedly connected to an assembly sleeve (3), the inner side of the assembly sleeve (3) is provided with a sampling syringe (4), the inner side of the handle (2) is provided with two sets of symmetrical first electric telescopic rods (5), the output shafts of the first electric telescopic rods (5) are fixedly connected to a support plate (6), an adjustment mechanism (8) is installed below the handle (2) at the upper end of the mounting plate (1), the lower end of the mounting plate (1) is fixedly connected to an assembly box (7), the lower end of the assembly box (7) is fixedly connected to a bottom plate (10), a disinfection mechanism (9) is installed inside the assembly box (7), and the disinfection mechanism (9) comprises a liquid storage tank (91) installed inside the assembly box (7).

2. The depth-adjustable bone marrow puncture needle assembly according to claim 1, characterized in that: The adjustment mechanism (8) comprises an L-shaped plate (81) fixedly connected to the assembly box (7); a motor (82) is mounted on the upper end of the L-shaped plate (81); a first discharge pipe (83) is rotatably connected to the lower end of the L-shaped plate (81); an output shaft of the motor (82) is fixedly connected to the first discharge pipe (83); a first gear (84) is fixedly connected to the outer side of the first discharge pipe (83); a second gear (85) is meshingly connected to the outer side of the first gear (84); a threaded sleeve (86) is fixedly connected to the lower end of the second gear (85); a sealing gasket (87) is provided at the upper end of the threaded sleeve (86); and the upper end of the threaded sleeve (86) is movably connected to the sampling syringe (4).

3. The depth-adjustable bone marrow puncture needle assembly according to claim 2, characterized in that: The outer side of the threaded sleeve (86) is threadedly connected to a third gear (88), the outer side of the third gear (88) is rotatably connected to a first synchronous belt (89), the inner side of the first synchronous belt (89) is rotatably connected to a fourth gear (810), the inner side of the fourth gear (810) is fixedly connected to the first feed tube (83), and the lower end of the threaded sleeve (86) is fixedly connected to a puncture needle (811).

4. The depth-adjustable bone marrow puncture needle assembly according to claim 3, characterized in that: The outer side of the puncture needle (811) passes through the bottom plate (10), and a second electric telescopic rod (812) is installed on the inner wall of the puncture needle (811). The output shaft of the second electric telescopic rod (812) is fixedly connected to a fixed sleeve (813), and the inner side of the fixed sleeve (813) is rotatably connected to a sampling needle (814). The outer side of the sampling needle (814) is slidably connected to a buffer cylinder (815), and the buffer cylinder (815) is arranged on the inner side of the threaded sleeve (86). The inner side of the buffer cylinder (815) is movably connected to the output port of the sampling needle (4).

5. The depth-adjustable bone marrow puncture needle assembly according to claim 3, characterized in that: The inner wall of the puncture needle barrel (811) is provided with a slide groove (817), the slide groove (817) is designed as an inclined surface, the inner side of the slide groove (817) is slidably connected to a slide rod (816), and one end of the slide rod (816) is fixedly connected to the sampling needle (814).

6. The depth-adjustable bone marrow puncture needle assembly according to claim 3, characterized in that: The inner wall of the puncture needle barrel (811) is fixedly connected with two groups of symmetrical L-shaped fixing rods (818), the inner side of the L-shaped fixing rod (818) is slidably connected with an L-shaped pull rod (819), the upper end of the L-shaped pull rod (819) is fixedly connected with a limiting block (820), the limiting block (820) is slidably connected to the inner side of the L-shaped fixing rod (818), the included angle of the L-shaped pull rod (819) is slidably connected to the lower end of the sampling needle (814), and a first spring (821) is arranged on the inner side of the L-shaped fixing rod (818), one end of the first spring (821) is fixedly connected to the L-shaped fixing rod (818), and the other end of the first spring (821) is fixedly connected to the limiting block (820).

7. The depth-adjustable bone marrow puncture needle assembly according to claim 2, characterized in that: The outer side of the first material discharge pipe (83) passes through the assembly box (7) and the bottom plate (10); the outer side of the first material discharge pipe (83) is rotatably connected to the liquid storage tank (91); two groups of blades (822) are fixedly connected to the inside of the liquid storage tank (91) outside the first material discharge pipe (83); a sealing sleeve (824) is rotatably connected to the outer side of the motor (82); the lower end of the sealing sleeve (824) is fixedly connected to the liquid storage tank (91); a first discharge hole (825) is provided on the outer side of the sealing sleeve (824); a first feed hole (826) is provided inside the sealing sleeve (824) outside the first material discharge pipe (83); a discharge port (823) is provided at the lower end of the first material discharge pipe (83); and a filter plate (827) is fixedly connected to the lower end of the first material discharge pipe (83).

8. The depth-adjustable bone marrow puncture needle assembly according to claim 2, characterized in that: A fifth gear (828) is fixedly connected below the outer bottom plate (10) of the first discharge tube (83); the outer side of the fifth gear (828) is rotatably connected to a second synchronous belt (829); the inner side of the second synchronous belt (829) is rotatably connected to four sets of fixed rotating shafts (830); the upper ends of the fixed rotating shafts (830) are rotatably connected to the bottom plate (10) via rotating shafts; the lower end of the second synchronous belt (829) is fixedly connected to a cleaning rod (831); the cleaning rod (831) is designed with an adsorption material.

9. The depth-adjustable bone marrow puncture needle assembly according to claim 1, characterized in that: A sealing rod (92) is fixedly connected to the inner side of the liquid storage box (91), a second discharge hole (93) is provided on the outer side of the sealing rod (92), an output pipe (94) is slidably connected to the inner side of the sealing rod (92), a second feed hole (95) is provided on the outer side of the output pipe (94), the outer side of the output pipe (94) passes through the bottom plate (10), an annular pressing plate (96) is fixedly connected to the lower end of the output pipe (94), the inner side of the annular pressing plate (96) is of hollow design, a liquid discharge groove is provided at the lower end of the annular pressing plate (96), and a cleaning cotton (98) is provided at the lower end of the annular pressing plate (96).

10. The depth-adjustable bone marrow puncture needle assembly according to claim 9, characterized in that: The upper end of the annular pressure plate (96) is fixedly connected to the output shafts of four groups of third electric telescopic rods (97), and the outer shells of the four groups of third electric telescopic rods (97) are fixedly connected to the bottom plate (10).

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