Blood sample collection device for clinical laboratory

Abstract

The invention belongs to the technical field of blood sample collection, and discloses a blood sample collection device for a clinical laboratory, the blood sample collection device comprises a bottom plate, the front part of the upper surface of the bottom plate is provided with a pulse pressing mechanism, and the middle part of the upper surface of the bottom plate is provided with a negative pressure blood drawing pump; the pulse pressing mechanism comprises a vertical plate vertically fixed to the upper surface of the bottom plate, a mounting cavity is formed in the upper portion of the vertical plate, and a T-shaped block is vertically and slidably mounted at the bottom of an inner cavity of the mounting cavity. Through the design of the tourniquet mechanism, the labor intensity of medical staff can be reduced, the working efficiency of the medical staff can be improved, a rubber bandage can completely wrap and bind arms, the tourniquet can be suitable for arms of different patients with different thicknesses and sizes, the tourniquet effect is good, the rubber bandage is not prone to dislocation during binding, the skin is not prone to being squeezed, and the tourniquet is suitable for medical workers. The safety is good, the practicability is high, and the problems that the labor intensity of medical staff is large, the thicknesses of arms of patients are different, the tightening effect is poor, the safety is low, and the practicability is poor are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of blood sample collection, in particular to a blood sample collection device for a laboratory. Background Art

[0002] The laboratory department is a bridge between clinical medicine and basic medicine, including branch disciplines such as clinical chemistry, clinical microbiology, clinical immunology, hematology, fluidology, and blood transfusion. Blood samples need to be collected due to inspections or related needs. Blood samples are collected by medical staff through veins and arteries. The process is to lay the blood donor's arm flat, tie a cuff above the elbow, and then draw blood for collection.

[0003] In the prior art, medical personnel usually tie the cuff around the patient's arm manually. When there are many patients, the labor intensity of the medical personnel is increased, fatigue is easily generated, and the work efficiency of the medical personnel is easily reduced.

[0004] A Chinese patent discloses a multifunctional blood sampling device for a laboratory (publication number: CN212939710U), which mainly uses a pressure rod and an elastic band to quickly tighten the arm of a patient who needs blood drawn. However, it still has corresponding disadvantages in actual use: when the above patent is in use, the patient's arm is placed between the pressure rod and the elastic band, and the arm is tightened by moving the elastic band downward in coordination with the pressure rod. However, there are cases where the patient's arms are of different thicknesses. At this time, when the elastic band cooperates with the pressure rod, the thicker arm will be tightened with greater force, and the thinner arm will be tightened with less force, which can easily lead to the problem of poor tightening effect.

[0005] A Chinese patent discloses an arm bracket for blood collection in a physical examination center (publication number: CN114795203B), which mainly involves inserting a hand between an L-shaped support frame and a support plate. At this time, the arm will press against the upper part of the pressure plate and then resist the sliding column to slide downward and stretch the limit spring. When the support plate descends synchronously, the two rubber ropes will be pulled along the guide wheel, so that the magnetic block and the magnetic plate on the outer wall of the rubber rope will no longer be adsorbed, so that the two rubber ropes can wrap around and tie the arm tightly. However, there are still corresponding disadvantages in actual use: when the above patent is used, the two rubber ropes are designed to be distributed front and back. When the two rubber ropes are tied to the arm tightly, the skin between the two rubber ropes is easily squeezed and damaged by the two rubber ropes, which can easily lead to problems of low safety and poor practicality. Summary of the invention

[0006] Technical issues solved

[0007] In order to solve the problems raised in the above-mentioned background technology, the present invention provides a blood sample collection device for a laboratory, which has the advantages of convenient operation, good tightening effect and strong practicality. Through the design of the pulse compression mechanism, the work efficiency of medical personnel is improved, and the arm can be completely covered and tightened. It can be suitable for the arm thicknesses of different patients, has a good pulse compression effect, and the rubber strap is not easy to be dislocated when tightened, and is not easy to squeeze the skin, so it has good safety and strong practicality.

[0008] Technical Solution

[0009] To achieve the above object, the present invention provides the following technical solution: a blood sample collection device for laboratory, comprising a bottom plate, a pulse compression mechanism is arranged at the front of the upper surface of the bottom plate, and a negative pressure blood pump is arranged at the middle of the upper surface of the bottom plate;

[0010] The compression mechanism includes a vertical plate fixed vertically on the upper surface of the bottom plate, an installation cavity is provided on the upper part of the vertical plate, a T-shaped block is vertically slidably installed on the bottom of the inner cavity of the installation cavity, a through hole is provided on the lower part of the vertical plate, and installation shells are slidably provided on the left and right sides of the inner cavity of the through hole and the bottom surface of the inner cavity, a connecting rod is fixedly installed between the front and rear side walls of the inner cavity of the installation shell, a bottom groove is provided on the bottom surface of the T-shaped block, and two assembly channels are symmetrically provided on the left and right sides of the inner cavity of the bottom groove, and the left and right sides of the lower part of the T-shaped block are symmetrically connected. Two rotating frames are installed through the rotating shaft, and a rotating roller is movably installed at the lower part of the inner cavity of the rotating frame through a bearing. A rubber band is arranged on the left and right sides of the middle part of the T-shaped block, and the lower part of the rubber band is located in the inner cavity of the penetration hole. A locking mechanism is arranged on the rotating roller, and a tightness adjustment mechanism is arranged in the inner cavity of the assembly channel. A reeling mechanism is arranged on the upper part of the T-shaped block, and a hydraulic cylinder is fixedly installed on the top of the vertical plate, and a connecting piece for driving the movement of the T-shaped block is arranged at the bottom output end of the hydraulic cylinder;

[0011] Among them, the lower part of the rubber band passes between the connecting rod and the inner cavity of the mounting shell, the middle part of the bottom surface of the mounting cavity is connected with the upper part of the inner cavity of the through hole, and the rubber band passes through the inner cavity of the bottom groove and the inner cavity of the assembly channel and below the rotating roller.

[0012] In the above technical solution, preferably, the connecting member includes a connecting frame that moves up and down on the front and rear side walls of the T-shaped block, docking grooves symmetrically arranged on the front and rear side walls of the T-shaped block, and a docking block that moves up and down in the docking grooves; wherein, the upper and lower side walls of the docking block are movably connected to the upper and lower sides of the inner cavity of the docking groove respectively, the side walls of the docking block are fixedly connected to the inner side walls of the connecting frame, and the upper surface of the connecting frame is fixedly connected to the end face of the output shaft of the hydraulic cylinder.

[0013] In the above technical scheme, preferably, the locking mechanism includes a guide rod movably installed in the inner cavity of the rotating roller through a bearing, a guide groove is provided on the rear side of the lower part of the inner cavity of the installation cavity, a pressure rod frame fixedly mounted on the guide rod, a bonding plate fixed to the lower part of the inner cavity of the rotating frame, a roller fixedly mounted on the rear part of the guide rod, and a guide rail fixedly mounted on the rear side of the lower part of the inner cavity of the installation cavity; wherein the upper part of the roller is movably connected to the bottom surface of the guide rail.

[0014] In the above technical solution, preferably, the tightness adjustment mechanism includes a flat plate which moves up and down in the inner cavity of the assembly channel, a locking frame is symmetrically and vertically fixedly installed on the front and rear sides of the upper surface of the flat plate, a limit block is fixedly installed on the top of the inner cavity of the locking frame, a limit slot matched with the limit block is circumferentially opened on the outer surface of the rotating shaft of the rotating frame, a pushing member is arranged above the flat plate, a compression spring is vertically arranged on the bottom surface of the flat plate, and a bolt is threadedly installed on the bottom surface of the T-shaped block; wherein a slider is rotatably installed on the top end of the bolt, and the bottom end of the compression spring is fixedly connected to the upper surface of the slider.

[0015] In the above technical solution, preferably, the pushing member includes a pushing frame rotatably installed in the inner cavity of the assembly channel through a rotating shaft, a force-bearing roller is rotatably installed on the upper part of the inner cavity of the pushing frame, a pin rod is fixedly installed on the lower part of the inner cavity of the pushing frame, and a pin shell is laterally fixedly installed on the upper surface of the flat plate; wherein the outer surface of the pin rod is movably connected to the inner cavity of the pin shell.

[0016] In the above technical solution, preferably, the unwinding mechanism includes two unwinding grooves symmetrically opened on the left and right sides of the upper part of the T-shaped block, an unwinding wheel is installed in the inner cavity of the unwinding groove through a rotating shaft, and a linkage mechanism is arranged on the front and rear sides of the T-shaped block and the connecting frame to drive the unwinding wheel to rotate; wherein the left and right ends of the rubber band are respectively wound around the two unwinding wheels.

[0017] In the above technical solution, preferably, the linkage mechanism includes gears respectively fixedly sleeved on the front and rear rotating shafts of the unwinding wheel, a vertical rod that moves left and right in the inner cavity of the installation cavity, a gear rod vertically fixed to the rear part of one side wall of the vertical rod and adapted to the gear, two groups of push rods dockedly arranged on the front and rear side walls of the connecting frame, and two push plates transversely fixedly installed at the bottom of the front and rear sides of the connecting frame; wherein, the front and rear side walls of the connecting frame are symmetrically provided with two groups of grooves, one end of the push rod is hinged to the inner cavity of the groove, the upper surface of the push rod is movably connected to the top surface of the inner cavity of the groove, the other end of the push rod is movably connected to the front part of one side wall of the vertical rod, the bottom surface of the push plate is movably connected to the upper part of the gear, the front and rear side walls of the T-shaped block are symmetrically fixedly installed with two groups of protrusions, the top of the protrusion is movably connected to the bottom surface of the push rod, and a spring rod is transversely arranged on the side of the vertical rod away from the gear, one end of the spring rod is fixedly connected to the side wall of the vertical rod, and the other end of the spring rod is fixedly connected to the inner cavity of the installation cavity.

[0018] In the above technical solution, preferably, the left and right sides of the inner cavity of the through hole and the bottom surface of the inner cavity are provided with sliding grooves adapted to the mounting shell, and a contraction spring seat is fixedly installed in the inner cavity of the sliding groove, and one end of the contraction spring seat is fixedly connected to one side of the outer surface of the mounting shell.

[0019] In the above technical solution, preferably, the negative pressure blood pump includes a negative pressure pump machine fixed on the upper surface of the base plate, a control panel is provided on the upper surface of the negative pressure pump machine, and a suction port of the negative pressure pump machine is connected to a suction needle.

[0020] Beneficial Effects

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention adopts the design of the pulse compression mechanism, the patient's arm is placed on the rubber bandage in the penetration hole, and the hydraulic cylinder is started to drive the T-shaped block to move downward through the connecting piece. When the T-shaped block moves downward, the rotating frame is driven to move outward. When the rotating frame moves, the locking mechanism is driven to clamp the rubber bandage, and the upper part of the rubber bandage can be stretched when the rotating frame moves, so that the part of the rubber bandage located in the penetration hole can be contracted to tighten the arm, which can reduce the labor intensity of medical personnel and improve the work efficiency of medical personnel. The rubber bandage can completely cover and tighten the arm and can be suitable for the arm thickness of different patients. The pulse compression effect is good, and the rubber bandage is not easy to be misplaced when tightened, and it is not easy to squeeze the skin. It has good safety and strong practicality, which solves the problems of high labor intensity of medical personnel, different arm thicknesses of patients, poor tightening effect, low safety and poor practicality in the prior art.

[0023] 2. The present invention adopts the coordinated design of structures such as T-block, rubber band, and unwinding mechanism. When the pulse pressure blood sampling is completed, the hydraulic cylinder is controlled to drive the connecting frame to move upward, and the gear rod is engaged with the gear under the push of the spring rod. When the connecting frame drives the T-block to move upward, the gear can rotate and drive the unwinding wheel to rotate to reel in the part of the rubber band that contacts the patient's skin, thereby reducing the cross-infection of bacteria during subsequent blood sampling of patients, having good hygiene, and further reducing the labor intensity of medical staff.

[0024] 3. The present invention adopts the coordinated design of structures such as T-shaped blocks, rubber bands, and tightness adjustment mechanisms. When the rubber band is stretched and interacts with the force-bearing roller, the interaction force is greater than the elastic force of the compression spring on the flat plate, and the rubber band can drive the push frame to flip upward. When the push frame flips, the flat plate can be driven downward by the pin rod and the pin shell. The flat plate can drive the locking frame to drive the limit card block to move downward, so that the limit card block is combined with the limit card slot, thereby locking the rotating frame to prevent it from moving outward and continuously stretching the rubber band, so that the part of the rubber band located in the penetration hole is too tight and causes discomfort to the patient's arm. Medical personnel can adjust the telescopic stroke of the compression spring by rotating the bolt. When the telescopic stroke of the compression spring is long, its elastic force on the flat plate is small, and when the telescopic stroke is short, its elastic force on the flat plate is large. By adjusting the length of the telescopic stroke of the compression spring, the size of its elastic force on the flat plate can be adjusted, so that the tightening degree of the part of the rubber band located in the penetration hole can be adjusted in advance, so as to meet the tightening strength required by different patients and help improve the patient's experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the negative pressure blood pump of the present invention;

[0028] Figure 3 It is a front cross-sectional structural schematic diagram of the vertical plate of the present invention;

[0029] Figure 4 It is a partial front cross-sectional structural schematic diagram of the pulse compression mechanism of the present invention;

[0030] Figure 5 for Figure 4 An enlarged schematic diagram of part A is shown;

[0031] Figure 6 It is a partial structural schematic diagram of the rotating frame, the tightness adjustment mechanism, and the locking mechanism of the present invention;

[0032] Figure 7 It is a partial cross-sectional structural schematic diagram of the T-shaped block, unwinding groove, unwinding wheel, and rubber band of the present invention;

[0033] Figure 8 It is a front structural schematic diagram of the linkage mechanism of the present invention;

[0034] Fig. 9 It is a partial top view structural schematic diagram of the linkage mechanism of the present invention.

[0035] In the figure: 1, bottom plate; 2, pulse compression mechanism; 21, vertical plate; 22, T-shaped block; 23, penetration hole; 24, mounting shell; 25, connecting rod; 26, bottom groove; 27, assembly channel; 28, rotating frame; 29, rotating roller; 210, rubber band; 211, hydraulic cylinder; 212, mounting cavity; 3, negative pressure blood pump; 4, locking mechanism; 41, guide rod; 42, guide groove; 43, pressure rod frame; 44, laminating plate; 45, roller; 46, guide rail; 5, tightness adjustment mechanism Structure; 51, flat plate; 52, locking frame; 53, limit block; 54, limit slot; 55, compression spring; 56, bolt; 6, unwinding mechanism; 61, unwinding slot; 62, unwinding wheel; 7, connecting piece; 71, connecting frame; 72, docking slot; 73, docking block; 8, pushing piece; 81, pushing frame; 82, force roller; 83, pin rod; 84, pin housing; 9, linkage mechanism; 91, gear; 92, vertical rod; 93, gear rod; 94, push rod; 95, push plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figures 1 to 9 As shown, the present invention provides a blood sample collection device for a laboratory, comprising a bottom plate 1, a pulse compression mechanism 2 is arranged at the front of the upper surface of the bottom plate 1, and a negative pressure blood pump 3 is arranged at the middle of the upper surface of the bottom plate 1; wherein the negative pressure blood pump 3 comprises a negative pressure pump machine fixed on the upper surface of the bottom plate 1, a control panel is arranged on the upper surface of the negative pressure pump machine, and a suction port of the negative pressure pump machine is connected to a suction needle;

[0038] When in use, the medical staff first connects the sampling tube to the sampling needle, and then squeezes the top of the sampling tube with the vacuum needle to make the vacuum needle penetrate into the sampling tube. The patient places his arm in the compression mechanism 2, and the medical staff controls the operation of the compression mechanism 2 through the control panel to tie the patient's arm tightly. Then the medical staff penetrates the sampling needle into the patient's vein, and operates the air negative pressure pump through the control panel to generate negative pressure in the sampling tube through the vacuum needle, and draws the blood sample into the sampling tube for collection.

[0039] The compression mechanism 2 includes a vertical plate 21 fixed vertically on the upper surface of the bottom plate 1, a mounting cavity 212 is provided on the upper part of the vertical plate 21, a T-shaped block 22 is vertically slidably installed at the bottom of the inner cavity of the mounting cavity 212, a through hole 23 is provided at the lower part of the vertical plate 21, mounting shells 24 are slidably provided on the left and right sides of the inner cavity of the through hole 23 and the bottom surface of the inner cavity, a connecting rod 25 is fixedly installed between the front and rear side walls of the inner cavity of the mounting shell 24, a bottom groove 26 is provided on the bottom surface of the T-shaped block 22, two assembly channels 27 are symmetrically provided on the left and right sides of the inner cavity of the bottom groove 26, two rotating frames 28 are symmetrically installed on the left and right sides of the lower part of the T-shaped block 22 through a rotating shaft, and a rotating roller is movably installed on the lower part of the inner cavity of the rotating frame 28 through a bearing 29, a rubber band 210 is arranged on the left and right sides of the middle of the T-shaped block 22, and the lower part of the rubber band 210 is located in the inner cavity of the penetration hole 23, a locking mechanism 4 is arranged on the rotating roller 29, a tightness adjustment mechanism 5 is arranged in the inner cavity of the assembly channel 27, and a reeling mechanism 6 is arranged on the upper part of the T-shaped block 22. A hydraulic cylinder 211 is fixedly installed on the top of the vertical plate 21. The hydraulic cylinder 211 is a prior art, which has an overflow valve and can set a set value. When the pressure exceeds the set value, the overflow valve will automatically open and discharge to avoid damage to the hydraulic cylinder 211 when it is blocked and stopped. Its structure and principle will not be repeated again. The bottom output end of the hydraulic cylinder 211 is provided with a connecting piece 7 for driving the movement of the T-shaped block 22;

[0040] Among them, the lower part of the rubber band 210 passes through the inner cavity of the connecting rod 25 and the mounting shell 24, the middle part of the bottom surface of the mounting cavity 212 is connected with the upper part of the inner cavity of the through hole 23, the rubber band 210 passes through the inner cavity of the bottom groove 26 and the inner cavity of the assembly channel 27 and the bottom of the rotating roller 29, and the left and right sides of the inner cavity of the through hole 23 and the bottom surface of the inner cavity are provided with sliding grooves that are compatible with the mounting shell 24, and a contraction spring seat is fixedly installed in the inner cavity of the sliding groove, and one end of the contraction spring seat is fixedly connected to one side of the outer surface of the mounting shell 24.

[0041] When in use, the patient's arm is placed on the rubber bandage 210 in the penetration hole 23, and the hydraulic cylinder 211 is started to drive the T-shaped block 22 to move downward through the connecting piece 7. When the T-shaped block 22 moves downward, the rotating frame 28 is driven to move outward. When the rotating frame 28 moves, the locking mechanism 4 is driven to clamp the rubber bandage 210, and the rotating frame 28 can stretch the upper part of the rubber bandage 210 when it moves, so that the part of the rubber bandage 210 located in the penetration hole 23 can be contracted to tighten the arm, which can reduce the labor intensity of medical staff and improve the work efficiency of medical staff. The rubber bandage 210 can completely cover and tighten the arm, which can be suitable for different arm sizes of patients, has a good pulse compression effect, and the rubber bandage 210 is not easy to be misplaced when tightened, and is not easy to squeeze the skin, has good safety and strong practicality.

[0042] It should be noted that when the pulse pressure blood sampling is completed, when the hydraulic cylinder 211 is controlled to drive the T-shaped block 22 to move upward through the connecting piece 7, the unwinding mechanism 6 can be driven to operate. When the unwinding mechanism 6 operates, the part of the rubber band 210 that contacts the patient's skin can be reeled in, thereby reducing the cross-infection of bacteria during subsequent blood sampling of patients, and having good hygiene. At the same time, it can further reduce the labor intensity of medical staff, and avoid the need for medical staff to manually untie the rubber band 210 after each blood sampling is completed.

[0043] It is worth mentioning that medical personnel can adjust the tightening force of the rubber band 210 in advance through the tightness adjustment mechanism 5, so as to meet the tightening force required by different patients and help improve the patient's experience.

[0044] like Figure 8 As shown, the connecting member 7 includes a connecting frame 71 that moves up and down on the front and rear side walls of the T-shaped block 22, a docking groove 72 symmetrically arranged on the front and rear side walls of the T-shaped block 22, and a docking block 73 that moves up and down in the docking groove 72; wherein, the upper and lower side walls of the docking block 73 are movably connected to the upper and lower sides of the inner cavity of the docking groove 72 respectively, the side wall of the docking block 73 is fixedly connected to the inner side wall of the connecting frame 71, and the upper surface of the connecting frame 71 is fixedly connected to the output shaft end face of the hydraulic cylinder 211.

[0045] When in use, when the hydraulic cylinder 211 drives the connecting frame 71 to move downward, the connecting frame 71 drives the docking block 73 to contact the bottom of the inner cavity of the docking groove 72, so that the connecting frame 71 can push the T-shaped block 22 to move downward, and the T-shaped block 22 can drive the rubber strap 210 downward to fit and tighten with the upper skin of the arm.

[0046] like Figure 5 As shown, the locking mechanism 4 includes a guide rod 41 movably installed in the inner cavity of the rotating roller 29 through a bearing, a guide groove 42 opened on the rear side of the lower part of the inner cavity of the installation cavity 212, a pressure rod frame 43 fixedly mounted on the guide rod 41, a fitting plate 44 fixed to the lower part of the inner cavity of the rotating frame 28, a roller 45 fixedly mounted on the rear part of the guide rod 41 and a guide rail 46 fixedly mounted on the rear side of the lower part of the inner cavity of the installation cavity 212; wherein the upper part of the roller 45 is movably connected to the bottom surface of the guide rail 46.

[0047] When in use, when the T-shaped block 22 moves downward, it drives the rotating frame 28 to move. Under the action of the guide rod 41 and the guide groove 42, the rotating frame 28 rotates outward to drive the roller 45 to move. The roller 45 interacts with the guide rail 46 to flip the pressure rod frame 43 to squeeze the rubber band 210. With the cooperation of the bonding plate 44, the pressure rod frame 43 can clamp and fix the rubber band 210, so that when the rotating frame 28 rotates outward, it can push the rubber band 210 to move, and the part of the rubber band 210 located in the penetration hole 23 can be contracted and brought together to tighten the arm and compress the pulse.

[0048] like Figure 6 As shown, the tightness adjustment mechanism 5 includes a plate 51 that moves up and down in the inner cavity of the assembly channel 27, and a locking frame 52 is symmetrically and vertically fixedly installed on the front and rear sides of the upper surface of the plate 51. A limit card block 53 is fixedly installed on the top of the inner cavity of the locking frame 52. A limit card groove 54 that is compatible with the limit card block 53 is circumferentially opened on the outer surface of the rotating shaft of the rotating frame 28. A pusher 8 is arranged above the plate 51, and a compression spring 55 is vertically arranged on the bottom surface of the plate 51. The bottom surface of the T-shaped block 22 is threaded with a thread. A bolt 56 is installed; wherein, a slider is rotatably installed on the top end of the bolt 56, and the bottom end of the compression spring 55 is fixedly connected to the upper surface of the slider. The pushing member 8 includes a pushing frame 81 rotatably installed in the inner cavity of the assembly channel 27 through a rotating shaft, and a force-bearing roller 82 is rotatably installed on the upper part of the inner cavity of the pushing frame 81, and a pin rod 83 is fixedly installed on the lower part of the inner cavity of the pushing frame 81, and a pin shell 84 is laterally fixedly installed on the upper surface of the flat plate 51; wherein, the outer surface of the pin rod 83 is movably connected to the inner cavity of the pin shell 84.

[0049] When in use, when the rubber band 210 is stretched and interacts with the force-bearing roller 82, the interactive force is greater than the elastic force of the compression spring 55 on the flat plate 51, the rubber band 210 can drive the push frame 81 to flip upward, and when the push frame 81 flips, the pin rod 83 and the pin shell 84 can drive the flat plate 51 to move downward, and the flat plate 51 can drive the locking frame 52 to drive the limit card block 53 to move downward, so that the limit card block 53 is combined with the limit card slot 54, so that the rotating frame 28 can be locked to prevent it from moving outward and continuously pressing the rubber band 28. 10 is stretched so that the portion of the rubber band 210 located in the through hole 23 is too tight and causes discomfort to the patient's arm. The medical staff can adjust the telescopic stroke of the compression spring 55 by rotating the bolt 56. When the telescopic stroke of the compression spring 55 is long, the elastic force on the flat plate 51 is small, and when the telescopic stroke is short, the elastic force on the flat plate 51 is large. By adjusting the length of the telescopic stroke of the compression spring 55, the elastic force on the flat plate 51 can be adjusted, so that the tightness of the portion of the rubber band 210 located in the through hole 23 can be adjusted.

[0050] like Figure 7 As shown, the unwinding mechanism 6 includes two unwinding grooves 61 symmetrically opened on the left and right sides of the upper part of the T-shaped block 22, and an unwinding wheel 62 is rotatably installed in the inner cavity of the unwinding groove 61 through a rotating shaft. A linkage mechanism 9 is arranged on the front and rear sides of the T-shaped block 22 and the connecting frame 71 for driving the unwinding wheel 62 to rotate; wherein, the left and right ends of the rubber band 210 are respectively wound around the two unwinding wheels 62.

[0051] When in use, when the hydraulic cylinder 211 is controlled to drive the connecting piece 7 to drive the T-shaped block 22 to move upward, the two unwinding wheels 62 can be driven to rotate in the same direction through the linkage mechanism 9, so that the part of the rubber bandage 210 that contacts the patient's skin can be reeled up.

[0052] like Figure 8 and Fig. 9 As shown, the linkage mechanism 9 includes gears 91 fixedly mounted on the front and rear rotating shafts of the unwinding wheel 62, a vertical rod 92 that moves left and right in the inner cavity of the installation cavity 212, a gear rod 93 vertically fixed to the rear of one side wall of the vertical rod 92 and adapted to the gear 91, two sets of abutment rods 94 docked on the front and rear side walls of the connecting frame 71, and two abutment plates 95 fixedly mounted on the bottom of the front and rear sides of the connecting frame 71 laterally; wherein, the front and rear side walls of the connecting frame 71 are symmetrically provided with two sets of grooves, and one end of the abutment rod 94 is hinged to the inner cavity of the groove The upper surface of the push rod 94 is movably connected to the top surface of the inner cavity of the groove, the other end of the push rod 94 is movably connected to the front part of one side wall of the vertical rod 92, the bottom surface of the push plate 95 is movably connected to the upper part of the gear 91, and two groups of protrusions are symmetrically fixedly installed on the front and rear side walls of the T-shaped block 22, and the top of the protrusion is movably connected to the bottom surface of the push rod 94. A spring rod is laterally arranged on the side of the vertical rod 92 away from the gear 91, one end of the spring rod is fixedly connected to the side wall of the vertical rod 92, and the other end of the spring rod is fixedly connected to the inner cavity of the installation cavity 212.

[0053] When the hydraulic cylinder 211 drives the connecting frame 71 to move downward, the connecting frame 71 drives the push rod 94 to move downward. When the push rod 94 moves downward, it interacts with the protrusion and then rotates outward to push the gear rod 93 to separate from the gear 91. At the same time, when the connecting frame 71 moves downward, it can drive the push plate 95 to fit with the gear 91, which can limit the rotation of the gear 91, thereby limiting the rotation of the unwinding wheel 62, and avoiding the tightening of the rubber band 210. When the blood collection is completed, the hydraulic cylinder 211 drives the connecting frame 71 to move upward. The connecting frame 71 moves upward and drives the push rod 94 to separate from the gear rod 93, and at the same time drives the push plate 95 to separate from the gear 91. The gear rod 93 meshes with the gear 91 under the push of the spring rod, so that when the T-shaped block 22 moves upward, the gear 91 can rotate and drive the unwinding wheel 62 to rotate to reel up the part of the rubber band 210 that contacts the patient's skin, thereby reducing the possibility of cross-infection of bacteria during subsequent blood collection from patients.

[0054] The working principle and use process of the present invention:

[0055] When in use, the medical staff first connects the sampling tube to the sampling needle, and then squeezes the top of the sampling tube with the suction needle to make the suction needle pierce the sampling tube. The patient places his arm on the rubber band 210 in the penetration hole 23, and controls the hydraulic cylinder 211 through the control panel to drive the connecting frame 71 to move downward. The connecting frame 71 drives the docking block 73 to contact the bottom of the inner cavity of the docking groove 72, so that the connecting frame 71 can push the T-shaped block 22 to move downward. When the T-shaped block 22 moves downward, it drives the rotating frame 28 to move. Under the action of the guide rod 41 and the guide groove 42, the rotating frame 28 rotates outward to drive the roller 45 to move, and the roller 45 interacts with the guide rail 46 to move downward. The pressure rod frame 43 is turned over to squeeze the rubber band 210. With the cooperation of the fitting plate 44, the pressure rod frame 43 can clamp and fix the rubber band 210, so that when the rotating frame 28 rotates outward, it can push the rubber band 210 to move, and the part of the rubber band 210 located in the penetration hole 23 can be contracted and brought together to tighten the arm to compress the pulse. After that, the medical staff inserts the sampling needle into the patient's vein, and operates the air negative pressure pump through the control panel to generate negative pressure in the sampling tube through the suction needle, so that the blood sample is drawn into the sampling tube for collection. When the pulse compression and blood sampling are completed, the hydraulic cylinder 211 is controlled to drive the connecting frame 71 to move upward, and the gear rod 93 is pushed by the spring rod. When the connecting frame 71 drives the T-shaped block 22 to move upward, the gear 91 can rotate to drive the unwinding wheel 62 to rotate and reel in the part of the rubber band 210 that contacts the patient's skin, and when the rubber band 210 is stretched and interacts with the force-bearing roller 82, the interaction force is greater than the elastic force of the compression spring 55 on the flat plate 51, and the rubber band 210 can drive the pushing frame 81 to flip upward. When the pushing frame 81 flips, the flat plate 51 can be driven to move downward through the pin rod 83 and the pin shell 84, and the flat plate 51 can drive the locking frame 52 to drive the limit block 53 to move downward, so that the limit block 53 is engaged with the limit slot 54. The rotating frame 28 is locked to prevent it from moving outward and continuously stretching the rubber band 210, so that the portion of the rubber band 210 located in the through hole 23 is too tight and causes discomfort to the patient's arm. The medical staff can adjust the telescopic stroke of the compression spring 55 by rotating the bolt 56. When the telescopic stroke of the compression spring 55 is long, the elastic force on the flat plate 51 is small, and when the telescopic stroke is short, the elastic force on the flat plate 51 is large. By adjusting the length of the telescopic stroke of the compression spring 55, the elastic force on the flat plate 51 can be adjusted, so that the tightness of the portion of the rubber band 210 located in the through hole 23 can be adjusted.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] 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 blood sample collection device for laboratory use, characterized in that: It comprises a bottom plate (1), a pulse compression mechanism (2) is arranged at the front of the upper surface of the bottom plate (1), and a negative pressure blood pump (3) is arranged at the middle of the upper surface of the bottom plate (1); The compression mechanism (2) comprises a vertical plate (21) fixed vertically on the upper surface of the bottom plate (1); a mounting cavity (212) is provided on the upper part of the vertical plate (21); a T-shaped block (22) is vertically slidably installed at the bottom of the inner cavity of the mounting cavity (212); a through hole (23) is provided on the lower part of the vertical plate (21); mounting shells (24) are slidably provided on the left and right sides of the inner cavity of the through hole (23) and on the bottom surface of the inner cavity; a connecting rod (25) is fixedly installed between the front and rear side walls of the inner cavity of the mounting shell (24); a bottom groove (26) is provided on the bottom surface of the T-shaped block (22); two assembly channels (27) are symmetrically provided on the left and right sides of the inner cavity of the bottom groove (26); and the left and right sides of the lower part of the T-shaped block (22) are symmetrically connected. Two rotating frames (28) are rotatably mounted on the rotating shaft, a rotating roller (29) is movably mounted on the lower part of the inner cavity of the rotating frame (28) through a bearing, a rubber band (210) is arranged on the left and right sides of the middle part of the T-shaped block (22), the lower part of the rubber band (210) is located in the inner cavity of the penetration hole (23), a locking mechanism (4) is arranged on the rotating roller (29), a tightness adjustment mechanism (5) is arranged in the inner cavity of the assembly channel (27), an unwinding mechanism (6) is arranged on the upper part of the T-shaped block (22), a hydraulic cylinder (211) is fixedly mounted on the top of the vertical plate (21), and a connecting piece (7) for driving the T-shaped block (22) to move is arranged at the bottom output end of the hydraulic cylinder (211); The lower part of the rubber band (210) passes through between the connecting rod (25) and the inner cavity of the mounting shell (24), the middle part of the bottom surface of the mounting cavity (212) is connected with the upper part of the inner cavity of the through hole (23), and the rubber band (210) passes through the inner cavity of the bottom groove (26) and the inner cavity of the assembly channel (27) and below the rotating roller (29).

2. A blood sample collection device for laboratory use according to claim 1, characterized in that: The connecting member (7) comprises a connecting frame (71) that moves up and down on the front and rear side walls of the T-shaped block (22), a docking groove (72) symmetrically arranged on the front and rear side walls of the T-shaped block (22), and a docking block (73) that moves up and down in the docking groove (72); wherein the upper and lower side walls of the docking block (73) are movably connected to the upper and lower sides of the inner cavity of the docking groove (72), the side wall of the docking block (73) is fixedly connected to the inner side wall of the connecting frame (71), and the upper surface of the connecting frame (71) is fixedly connected to the end surface of the output shaft of the hydraulic cylinder (211).

3. A blood sample collection device for laboratory use according to claim 1, characterized in that: The locking mechanism (4) comprises a guide rod (41) movably mounted in the inner cavity of the rotating roller (29) via a bearing, a guide groove (42) provided at the rear side of the lower inner cavity of the installation cavity (212), a pressure rod frame (43) fixedly sleeved on the guide rod (41), a bonding plate (44) fixed at the lower inner cavity of the rotating frame (28), a roller (45) fixedly sleeved at the rear of the guide rod (41), and a guide rail (46) fixedly mounted at the rear side of the lower inner cavity of the installation cavity (212); wherein the upper part of the roller (45) is movably connected to the bottom surface of the guide rail (46).

4. A blood sample collection device for laboratory use according to claim 1, characterized in that: The tightness adjustment mechanism (5) comprises a plate (51) which moves up and down in the inner cavity of the assembly channel (27); a locking frame (52) is symmetrically and vertically fixedly installed on the front and rear sides of the upper surface of the plate (51); a limit block (53) is fixedly installed on the top of the inner cavity of the locking frame (52); a limit slot (54) which is matched with the limit block (53) is circumferentially opened on the outer surface of the rotating shaft of the rotating frame (28); a pushing member (8) is arranged above the plate (51); a compression spring (55) is vertically arranged on the bottom surface of the plate (51); and a bolt (56) is threadedly installed on the bottom surface of the T-shaped block (22); wherein a slider is rotatably installed on the top end of the bolt (56), and the bottom end of the compression spring (55) is fixedly connected to the upper surface of the slider.

5. A blood sample collection device for laboratory use according to claim 4, characterized in that: The pushing member (8) comprises a pushing frame (81) rotatably mounted in the inner cavity of the assembly channel (27) via a rotating shaft, a force-bearing roller (82) is rotatably mounted on the upper part of the inner cavity of the pushing frame (81), a pin rod (83) is fixedly mounted on the lower part of the inner cavity of the pushing frame (81), and a pin shell (84) is laterally fixedly mounted on the upper surface of the flat plate (51); wherein the outer surface of the pin rod (83) is movably connected to the inner cavity of the pin shell (84).

6. A blood sample collection device for laboratory use according to claim 2, characterized in that: The unwinding mechanism (6) comprises two unwinding grooves (61) symmetrically arranged on the left and right sides of the upper part of the T-shaped block (22); an unwinding wheel (62) is rotatably installed in the inner cavity of the unwinding groove (61) via a rotating shaft; and a linkage mechanism (9) is arranged on the front and rear sides of the T-shaped block (22) and the connecting frame (71) for driving the unwinding wheel (62) to rotate; wherein the left and right ends of the rubber band (210) are respectively wound around the two unwinding wheels (62).

7. A blood sample collection device for laboratory use according to claim 6, characterized in that: The linkage mechanism (9) comprises gears (91) respectively fixedly mounted on the front and rear rotating shafts of the unwinding wheel (62), a vertical rod (92) movable left and right in the inner cavity of the installation cavity (212), a gear rod (93) vertically fixed to the rear part of one side wall of the vertical rod (92) and adapted to the gear (91), two groups of abutment rods (94) dockedly arranged on the front and rear side walls of the connecting frame (71), and two abutment plates (95) fixedly mounted laterally on the bottom of the front and rear sides of the connecting frame (71); wherein the front and rear side walls of the connecting frame (71) are symmetrically provided with two groups of grooves, one end of the abutment rod (94) is hinged to the inner cavity of the groove, and the abutment plates (95) are hinged to the inner cavity of the groove. The upper surface of the rod (94) is movably connected to the top surface of the inner cavity of the groove, the other end of the support rod (94) is movably connected to the front part of a side wall of the vertical rod (92), the bottom surface of the support plate (95) is movably connected to the upper part of the gear (91), and two groups of protrusions are symmetrically fixedly installed on the front and rear side walls of the T-shaped block (22), the top of the protrusion is movably connected to the bottom surface of the support rod (94), and a spring rod is transversely arranged on the side of the vertical rod (92) away from the gear (91), one end of the spring rod is fixedly connected to the side wall of the vertical rod (92), and the other end of the spring rod is fixedly connected to the inner cavity of the installation cavity (212).

8. The blood sample collection device for laboratory use according to claim 1, characterized in that: The left and right sides of the inner cavity of the penetration hole (23) and the bottom surface of the inner cavity are provided with sliding grooves adapted to the mounting shell (24), a contraction spring seat is fixedly installed in the inner cavity of the sliding groove, and one end of the contraction spring seat is fixedly connected to one side of the outer surface of the mounting shell (24).

9. A blood sample collection device for laboratory use according to claim 1, characterized in that: The negative pressure blood pump (3) comprises a negative pressure pump machine fixed on the upper surface of the base plate (1), a control panel is provided on the upper surface of the negative pressure pump machine, and a suction port of the negative pressure pump machine is connected to a suction needle.

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