A blood centrifugation separation device

Abstract

The application belongs to the technical field of medical apparatus and instruments. In view of the poor use effect of the centrifugal separation device, the application provides a blood centrifugal separation device, which comprises an outer box body, a rotating motor, an inner box body, an inclined slide, a test tube positioning cylinder and a self-locking mechanism. The rotating motor is arranged in the inner box body, the output end of the rotating motor is connected with the bottom surface of the inner box body, the inclined slide is arranged in the inner box body, the test tube positioning cylinder is arranged on the inclined slide, and the self-locking mechanism is arranged at the bottom end of the inclined slide. In the centrifugal process, the test tube positioning cylinder slides from the top end to the bottom end of the inclined slide under the action of its own gravity, triggers the self-locking mechanism, and the self-locking mechanism fixes the test tube positioning cylinder, so that the position of the blood sample test tube in the test tube positioning cylinder is fixed, the blood sample test tube is prevented from shaking or falling out in the inclined centrifugal process, and the centrifugal effect of the overall device is improved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a blood centrifugation separation device. Background Technology

[0002] Blood centrifugation is a process that uses the centrifugal force generated by the rotation of a centrifuge to separate different components in blood into layers based on their density differences. It is commonly used in medical testing for serum or plasma separation. The operation requires careful control of the rotation speed, time, and temperature, and care must be taken to avoid hemolysis or sample contamination to ensure accurate testing. Generally, when performing routine blood tests and complete blood cell counts, the test tube containing the sample should be placed vertically for centrifugation to allow the sediment to concentrate at the bottom of the tube, resulting in a clear separation interface. When performing biochemical serum separation, the test tube containing the sample should be tilted for centrifugation to increase the sedimentation area and facilitate better extraction of serum or plasma.

[0003] Patent CN114918047B discloses a self-tilting blood centrifuge device, including a housing, a rotating shaft, a centrifuge support, and a transmission mechanism; wherein, support arms are fixedly installed at the upper and lower ends of the centrifuge support. In use, several blood sample tubes are initially inserted into the C-shaped ends of the support arms. After the rotating shaft rotates, it causes the blood sample tubes to rotate. As the rotation speed of the shaft gradually increases, the centrifuge support tilts outward at the hinge point between the top and the groove, causing the blood sample tubes to tilt at 40°.

[0004] However, although the above-mentioned technical solution can perform tilted centrifugation on blood sample tubes, the blood sample tubes are only fixed by the C-shaped end of the support arm. If the rotation speed of the shaft changes suddenly or the device vibrates slightly during centrifugation, the tubes are very likely to fall off the C-shaped end, causing blood sample contamination, equipment contamination, or even damage to the internal structure of the device by glass tube fragments. In addition, the support arm is designed with a C-shaped end, and the bottom of the blood sample tube is supported only by the concave plate on the lower side. During high-speed tilted centrifugation, the blood sample tubes are prone to radial shaking or axial movement due to centrifugal force. The shaking can cause the blood sample tubes to break and blood to leak, resulting in poor overall device performance. Summary of the Invention

[0005] The purpose of this invention is to overcome the problem of poor performance of existing centrifugal separation devices.

[0006] To achieve the above objectives, the present invention adopts the following technical approach: It provides a blood centrifugation device, comprising an outer casing, a rotary motor, an inner casing, an inclined slide, a test tube positioning cylinder, and a self-locking mechanism. The rotary motor is located inside the outer casing, and its output end is connected to the bottom surface of the inner casing. The inclined slide is located inside the inner casing, the test tube positioning cylinder is positioned on the inclined slide, and the self-locking mechanism is located at the bottom end of the inclined slide. During centrifugation, the test tube positioning cylinder slides down from the top to the bottom of the inclined slide under its own gravity, triggering the self-locking mechanism. The self-locking mechanism fixes the test tube positioning cylinder, thereby fixing the position of the blood sample test tube inside the test tube positioning cylinder, preventing the blood sample test tube from shaking or falling out during inclined centrifugation, and improving the overall centrifugation effect of the device.

[0007] Based on the above technical concept, the technical solution adopted by this invention is as follows: A blood centrifuge separation device includes an outer casing and further includes: The inner box is rotatably mounted inside the outer box. Multiple inclined slides are arranged in a circular pattern inside the inner box; Multiple test tube positioning cylinders are respectively set on corresponding inclined slides; Multiple self-locking mechanisms are located at the bottom of the corresponding inclined slides and are in contact with the corresponding test tube positioning cylinders.

[0008] To prevent blood sample tubes located in the individual tube positioning cylinders from falling out or shaking during tilted centrifugation, in the above technical solution, preferably, the self-locking mechanism includes: The telescopic push plate is located inside the corresponding inclined slide, with one end in contact with the bottom surface of the corresponding test tube positioning cylinder and the other end connected to the inner wall of the inner box. The locking plate is located on one side of the telescopic push plate and is engaged with the side of the test tube positioning cylinder. The lifting assembly is located on the bottom surface inside the inner box and is connected to the inclined slide, the telescopic push plate, and the locking plate respectively.

[0009] To quickly fix the test tube positioning cylinder, the lifting assembly further specifies the above technical solution as follows: The T-shaped base is connected to the bottom surface of the inclined slide, and one end of the T-shaped base is perpendicular to the locking plate and slidably connected. The rotating plate is rotatably connected to the other end of the T-shaped base at its center. The upper end of the rotating plate is in contact with the telescopic push plate, and the lower end is rotatably equipped with a horizontal connecting rod. The end of the horizontal connecting rod away from the rotating plate passes through the T-shaped base and is slidably connected to the locking plate.

[0010] To facilitate the placement of blood sample tubes by medical staff, the above technical solution is further refined by adding multiple horizontal support rods inside the inner box. One end of each horizontal support rod is located below the corresponding test tube positioning tube, and the other end is connected to the inner wall of the inner box.

[0011] To facilitate medical staff in removing the centrifuged blood sample tubes and repositioning the tube positioning cylinders and horizontal support rods, the above technical solution is further refined by incorporating a repositioning mechanism inside the inner casing. This repositioning mechanism includes: The first reset ring has its outer side slidably connected to the inside of the inner box. Multiple lifting ropes, one end of each lifting rope is connected to the first reset ring, and the other end is connected to the corresponding test tube positioning cylinder. Each lifting rope is used to reset the corresponding test tube positioning cylinder. The second reset ring is located inside the first reset ring and is slidably connected to the first reset ring. The second reset ring is used to reset each transverse support rod. The lever is detachably connected to the first reset ring and the second reset ring, respectively.

[0012] To prevent the reset mechanism from moving during centrifugation and to improve the overall stability of the device, the above technical solution is further specified. The second reset ring is provided with multiple telescopic blocks for sliding connection with the first reset ring, and each telescopic block is engaged with the inner wall of the inner box. Multiple paddles are arranged circumferentially on the inner side of the second reset ring, and each paddle contacts the corresponding transverse support rod.

[0013] To achieve rapid resetting of each horizontal support rod, the above technical solution is further specified. The resetting mechanism also includes multiple first unlocking units. One end of each first unlocking unit is connected to the corresponding inclined slide, and the other end passes through the inner wall of the inner box and abuts against the upper end of the corresponding telescopic block.

[0014] To further specify the above technical solution, each first unlocking unit includes: The first hydraulic cylinder is embedded inside the top of the corresponding inclined slide; The upper end of the first hydraulic rod is connected to the lower end of the first hydraulic cylinder, and the lower end is in contact with the corresponding test tube positioning cylinder. The first hydraulic pipe has one end connected to the upper end of the first hydraulic cylinder, and the other end passes through the inner wall of the inner box and is located above the corresponding telescopic block. The first extrusion rod is fixedly connected to the end of the first hydraulic pipe away from the first hydraulic cylinder.

[0015] To further improve the efficiency of the second reset ring in pushing the transverse support rod to reset, the above technical solution is further specified: each telescopic block is a square structure with rounded corners at one end and an arched slide that contacts the first compression rod at the other end.

[0016] To further refine the above technical solution and facilitate the return of the test tube positioning cylinder to its initial position, the reset mechanism also includes multiple second unlocking units, each of which includes: The second compression rod is vertically set on the bottom surface of the first reset ring and located above the corresponding telescopic push plate; The second hydraulic cylinder is disposed on the upper surface of the telescopic push plate, and the upper end of the second hydraulic cylinder is provided with a second hydraulic rod, which is in contact with the second extrusion rod. The second hydraulic pipe has one end connected to the bottom surface of the second hydraulic cylinder, and the other end inserted into the telescopic push plate and connected to the push plate in the telescopic push plate. Beneficial effects

[0017] I. This invention, through the combined design of an inclined slide, a test tube positioning cylinder, and a self-locking mechanism, allows medical personnel to simply place the blood sample tube vertically into the test tube positioning cylinder before centrifugation. During centrifugation, the system automatically tilts the blood sample tube and locks it in the positioning cylinder, securing it in three directions. This effectively prevents the blood sample tube from shaking in the inclined slide within the positioning cylinder, ensuring the stability of the entire device during centrifugation and resulting in excellent performance.

[0018] Second, through the combined design of the horizontal support rod and the test tube positioning cylinder, the present invention can place the test tube positioning cylinder vertically before centrifugation, so that medical staff can quickly put the blood sample tube into the test tube positioning cylinder. The placement of the blood sample tube is easy and efficient.

[0019] Third, through the combined design of the first reset ring, the lifting rope, and the lever, this invention allows medical staff to simply rotate the first reset ring using the lever after centrifugation, and then lift each test tube positioning cylinder upwards using the lifting ropes, so that each test tube positioning cylinder returns to its initial position, thus achieving the reset of the test tube positioning cylinder. This eliminates the need for medical staff to reset each test tube positioning cylinder and then remove each blood sample test tube at once, thereby improving the efficiency of the centrifugation operation.

[0020] Fourth, the present invention, through the combined design of the first reset ring, the second reset ring and the lever, allows medical staff to rotate the first reset ring by simply using the lever, while simultaneously rotating the second reset ring in the same direction. This enables the test tube positioning cylinder to be reset at the same time, and also drives each horizontal support rod to be reset simultaneously, so as to carry out the next centrifugation operation, thus further improving the efficiency of centrifugation operation.

[0021] V. Through the combined design of the first unlocking unit, the test tube positioning cylinder, and the second reset ring, this invention can automatically keep the test tube positioning cylinder and the second reset ring in a fixed state throughout the centrifugation process, ensuring normal centrifugation. After centrifugation, the test tube positioning cylinder returns to its initial position and abuts against the first unlocking unit, thereby automatically opening the first unlocking unit and allowing the second reset ring to disengage from the limiting groove of the box. This allows the second reset ring to drive each lever to rotate, and in turn, each lever drives the corresponding transverse support rod to reset simultaneously, further improving the efficiency of centrifugation operation.

[0022] VI. Through the combined design of the second unlocking unit and the telescopic push plate, the present invention releases each test tube positioning cylinder so that the test tube positioning cylinder moves upward under the drive of the lifting rope, ensuring the normal operation of the whole device. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a blood centrifugation separation device provided in an embodiment of the present invention; Figure 2 for Figure 1 A half-sectional view of the device shown; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 3 Enlarged view of point B in the middle; Figure 5 for Figure 1 Disassembly diagram of the internal components of the inner box 7; Figure 6 This is a schematic diagram showing the positional relationship between the second reset ring and the lever; Figure 7 This is a schematic diagram of the structure of the first reset ring; Figure 8 This is a structural schematic diagram of a horizontal support rod; Figure 9 This is a schematic diagram of the self-locking mechanism; Figure 10 This is a schematic diagram showing the connection relationship between the inner box, the inclined slide, the test tube positioning cylinder, and the first unlocking unit. Figure 11 for Figure 1 Partial cross-sectional view of the inner box; Figure 12 for Figure 11 Enlarged view of point C in the middle; Figure 13 for Figure 11 A cross-sectional view of the location of the first extrusion rod in the device shown; Figure 14 for Figure 13 Enlarged view of point D in the middle; Figure 15 This is a schematic diagram of the test tube positioning cylinder when it is in a self-locking state. Figure 16 This is a diagram showing the state of the test tube positioning cylinder when it is unlocked and facing upwards.

[0025] Among them, 1. Inclined slide; 2. Test tube positioning cylinder; 21. First locking tooth; 3. Self-locking mechanism; 31. Telescopic push plate; 31a. T-shaped sliding rod; 31a-1. Push plate; 31b. Second mounting cylinder; 31c. Third return spring; 32. Locking plate; 32a. Second locking tooth; 33. T-shaped base; 34. Rotating plate; 35. Horizontal connecting rod; 36. First return spring; 4. Outer box; 5. Reset mechanism; 51. First reset ring; 51a. First annular portion; 51b. Second annular portion; 52. Lifting rope; 53. Second reset ring; 53a. Telescopic locking block; 53b. Paddle; 54. Paddle lever; 55. First unlocking unit; 55a. First hydraulic cylinder; 55b. First hydraulic rod; 55c. First hydraulic pipe; 55d. First compression rod; 56. Second unlocking unit; 56a. Second pressing rod; 56b. Second hydraulic cylinder; 56c. Second hydraulic rod; 56d. Second hydraulic pipe; 56e. Second return spring; 6. Rotary motor; 7. Inner box; 8. Horizontal support rod. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0027] In the description of this invention, it should be understood that the terms "length direction," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features limited to "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] The inventors discovered that while current centrifugation devices can perform tilted centrifugation on blood sample tubes, the tubes are only secured by the C-shaped end of the support arm. If the rotation speed changes abruptly or the device vibrates slightly during centrifugation, the tubes can easily detach from the C-shaped end, causing contamination of the blood sample and equipment. In severe cases, glass fragments can damage the internal structure of the device. Furthermore, the C-shaped design of the support arm, which only supports the bottom of the blood sample tube via a concave plate on the lower side, makes the tubes prone to radial or axial movement due to centrifugal force during high-speed tilted centrifugation. This movement can cause the blood sample tubes to rupture and leak blood, resulting in poor overall device performance.

[0030] Based on the above findings, this application provides a blood centrifugation device comprising an outer casing 4, a rotary motor 6, an inner casing 7, and multiple inclined slides 1, multiple test tube positioning cylinders 2, multiple self-locking mechanisms 3, and a reset mechanism 5 disposed within the inner casing 7. This application improves the stability of blood sample tubes during inclined centrifugation through the following design, thereby enhancing the overall effectiveness of the device: 1. The cooperation between the inclined slide 1 and the test tube positioning cylinder 2 can limit the blood sample tube located inside the test tube positioning cylinder 2 in both left and right directions, prevent the blood sample tube from shaking from side to side, and ensure the stability of the overall device. 2. The self-locking mechanism 3 can fix the bottom surface of the test tube positioning cylinder 2, so that all three sides of the test tube positioning cylinder 2 are fixed, preventing the test tube positioning cylinder 2 from sliding on the inclined slide 1 during centrifugation, and further ensuring the stability of the overall device. 3. The reset mechanism 5 can lift each test tube positioning cylinder 2 back to its initial position after centrifugation, making it easy and quick to use for the next centrifugation.

[0031] Example 1 This embodiment provides a blood centrifugation separation device, such as... Figures 1 to 16 As shown, it includes an outer box 4, a rotary motor 6, an inner box 7, and multiple inclined slides 1, multiple test tube positioning cylinders 2, multiple self-locking mechanisms 3 and a reset mechanism 5 disposed inside the inner box 7.

[0032] Both the outer box 4 and the inner box 7 are circular box structures with their openings facing upwards. The rotary motor 6 is fixedly mounted on the bottom surface inside the opening of the outer box 4, and the output end of the rotary motor 6 is fixedly connected to the bottom surface of the inner box 7. The rotary motor 6 provided in this embodiment is prior art; for example, the rotary motor 6 is a brushless motor of model BS5520.

[0033] Multiple inclined slides 1 are arranged in a circular pattern inside the inner box 7. Each inclined slide 1 includes two symmetrically arranged slide rails. Each slide rail includes a vertical section and an inclined section fixedly connected to the vertical section. The vertical section is located inside the inner box 7 and near the center. The end of the inclined section away from the vertical section is fixedly connected to the inner wall of the inner box 7. Specifically, a groove is formed on the opposite side of the two slide rails in each inclined slide 1. This groove is used for sliding connection with the corresponding test tube positioning cylinder 2.

[0034] The test tube positioning cylinder 2 is a long columnar structure with a circular placement groove in the center, and circular sliding columns are fixedly installed on the two sides of the test tube positioning cylinder 2. The circular sliding columns are used to slide and connect with the sliding grooves on the slide rail. Multiple first locking teeth 21 are fixedly installed on the bottom surface of the test tube positioning cylinder 2 at equal intervals. The first locking teeth 21 are used to engage with the self-locking mechanism 3.

[0035] In practical use, to ensure that each test tube positioning cylinder 2 remains vertical so that medical personnel can place blood sample tubes inside the corresponding test tube positioning cylinder 2, multiple horizontal support rods 8 are fixedly installed on the inner wall of the inner box 7. Specifically, each horizontal support rod 8 is a telescopic structure, including an L-shaped support rod and a first mounting cylinder. One end of the L-shaped support rod is below the corresponding test tube positioning cylinder 2, and the other end is slidably connected to the first mounting cylinder. The end of the first mounting cylinder away from the L-shaped support rod is fixedly connected to the inner wall of the inner box 7. Each first mounting cylinder is fixedly equipped with a gravity block. Thus, after the medical personnel place the blood sample tube in the test tube positioning cylinder 2, they start the rotary motor 6. As the rotary motor 6 drives the inner box 7 to rotate from low speed to high speed, each horizontal support rod 8 moves into the corresponding first mounting cylinder under centrifugal force. At this time, the test tube positioning cylinder 2 loses the support of the L-shaped support rod and slides down to the bottom of the inclined slide 1 under its own gravity, where it abuts against the corresponding self-locking mechanism 3.

[0036] In actual use, the friction between the transverse support rod 8 and the test tube positioning cylinder 2 is less than the centrifugal force generated by the blood sample tube and the test tube positioning cylinder 2 together. The sum of the weights of the blood collection tube and the test tube positioning cylinder 2 is greater than the sum of the centrifugal forces generated by the two. Thus, after the rotary motor 6 is started, the transverse support rod 8 retracts into the first mounting cylinder under the action of centrifugal force, and the blood collection tube and the test tube positioning cylinder 2 slide towards the bottom end of the inclined slide rail 1 under their own weight.

[0037] Multiple self-locking mechanisms 3 are respectively set at the bottom of the inclined section of the corresponding inclined slide 1 so as to engage with the corresponding test tube positioning cylinder 2; specifically, each self-locking mechanism 3 includes a telescopic push plate 31, a locking plate 32 and a lifting assembly.

[0038] The telescopic push plate 31 is a telescopic structure, including a T-shaped sliding rod 31a and a second mounting cylinder 31b. Specifically, the second mounting cylinder 31b is radially disposed inside the inner box 7, and one end is fixedly connected to the inner wall of the inner box 7. A third return spring 31c is fixedly disposed inside the second mounting cylinder 31b. One end of the T-shaped sliding rod 31a is located outside the second mounting cylinder 31b, and the other end is slidably disposed inside the second mounting cylinder 31b and fixedly connected to the third return spring 31c. In actual use, after the blood sample tube is placed into the test tube positioning cylinder 2, the total weight of the test tube positioning cylinder 2 and the blood sample tube can overcome the elastic force of the third return spring 31c and push the T-shaped sliding rod 31a into the second mounting cylinder 31b.

[0039] The locking plate 32 is a long strip-shaped plate structure. The upper end of the locking plate 32 is fixedly provided with multiple second locking teeth 32a arranged at equal intervals. These multiple second locking teeth 32a are used to engage with the first locking teeth 21 to fix the position of the corresponding test tube positioning cylinder 2 and prevent the test tube positioning cylinder 2 from shaking on the inclined slide 1 during centrifugation. The lower end of the locking plate 32 is provided with a chamfer, and a sliding groove is opened on the chamfered surface. This sliding groove is used to slide and connect with the lifting assembly. The locking plate 32 is vertically set inside the inner box 7 through the lifting assembly.

[0040] The lifting assembly includes a T-shaped base 33, a rotating plate 34, a transverse connecting rod 35, and a first return spring 36.

[0041] Specifically, the top surface of the T-shaped base 33 is fixedly connected to the bottom surface of the corresponding slide rail by two vertical connecting rods; the T-shaped base 33 is vertically set on the inner bottom surface of the inner box 7, and one end of the T-shaped base 33 is provided with a vertical through hole for sliding connection with the locking plate 32, and the other end is provided with a rectangular groove for rotating connection with the rotating plate 34.

[0042] The rotating plate 34 is located in the rectangular groove of the T-shaped base 33 and is rotatably connected to the T-shaped base 33, and the rotating plate 34 is located between the two vertical connecting rods.

[0043] One end of the transverse connecting rod 35 is rotatably connected to the bottom surface of the rotating plate 34, and the other end passes horizontally through the T-shaped base 33 and is slidably connected to the groove on the chamfered slope of the locking plate 32; wherein, in order to prevent the transverse support plate 35 from rotating with the rotating rod 34 during the rotation of the rotating plate 34, a clearance groove is provided on the rotating rod 34.

[0044] Thus, when the test tube positioning cylinder 2 slides to the bottom of the inclined slide 1 under centrifugal force, the bottom surface of the test tube positioning cylinder 2 contacts the T-shaped sliding rod 31a and pushes the T-shaped sliding rod 31a into the second mounting cylinder 31b. During the movement of the T-shaped sliding rod 31a, the lower end of the T-shaped sliding rod 31a abuts against the upper end of the rotating plate 34 and pushes the upper end of the rotating plate 34 in the same direction, causing the lower end of the rotating plate 34 to tilt upward. This causes the lower end of the rotating plate 34 to push the transverse connecting rod 35 to move laterally towards the end closer to the locking plate 32. Since the transverse connecting rod 35 is slidably connected to the groove on the chamfered inclined surface of the locking plate 32, the locking plate 32 moves upward under the pushing force of the transverse connecting rod 35, thereby causing the second locking tooth 32a to engage with the first locking tooth 21, thus fixing the position of the test tube positioning cylinder 2.

[0045] In practical use, the distance of the transverse connecting rod 35 to move laterally can be adjusted by adjusting the weight of the test tube positioning cylinder 2, thereby adjusting the distance of the locking plate 32 to move vertically upward so that the second locking tooth 32a can engage with the first locking tooth 21.

[0046] To facilitate the resetting of the rotating plate 34, the first reset spring 36 is horizontally positioned inside the inner box 7, with one end fixedly connected to the inner wall of the inner box 7 and the other end fixedly connected to the bottom end of the rotating plate 34. In the initial state, the first reset spring 36 is in its natural state. When the rotating plate 34 rotates clockwise, causing the transverse connecting rod 35 to move laterally towards the end closer to the locking plate 32, the total weight of the test tube positioning cylinder 2 and the blood sample test tube overcomes the elastic force of the third reset spring 31c and the first reset spring 36 itself, causing the first reset spring 36 to be stretched.

[0047] It should be noted that the number of test tube positioning cylinders 2 is not limited in the embodiments of the present invention. The embodiments of the present invention are illustrated with an example of four test tube positioning cylinders 2.

[0048] The reset mechanism 5 includes a first reset ring 51, multiple lifting ropes 52, a second reset ring 53, a lever 54, multiple first unlocking units 55, and multiple second unlocking units 56.

[0049] The first reset ring 51 includes a first annular portion 51a and a second annular portion 51b, both of which are circular. Specifically, the upper surface of the first annular portion 51a has an annular groove for sliding connection with the second reset ring 53. The second annular portion 51b is located inside the first annular portion 51a and is fixedly connected to the first annular portion 51a. A plurality of equally spaced levers are fixedly arranged on the upper surface of the second annular portion 51b. In actual use, a lever 54 can be inserted into the gap between the levers to rotate the first reset ring 51.

[0050] The lever 54 is a vertical lever. Before centrifugation, medical staff remove the lever 54 to install and centrifuge the blood sample tube. After centrifugation, the lever 54 is inserted into the gap between the lever blocks to rotate the first reset ring 51. After use, the lever 54 is pulled out.

[0051] One end of each lifting rope 52 is fixedly connected to the corresponding test tube positioning cylinder 2, and the other end passes through the guide ring fixedly set on the inner wall of the inner box 7 and is fixedly connected to the first annular part 51a. In this way, when the first reset ring 51 rotates, each test tube positioning cylinder 2 is pulled upward by each lifting rope 52 until each test tube positioning cylinder 2 returns to the initial position, thereby realizing the reset of the test tube positioning cylinder 2.

[0052] The second reset ring 53 is a circular ring structure, located inside the second ring portion 51b, and is on the same horizontal plane as the second ring portion 51b.

[0053] Specifically, multiple C-shaped connecting rods are arranged circumferentially and at equal intervals on the upper surface of the second reset ring 53. One end of each C-shaped connecting rod is fixedly connected to the second reset ring 53, and the other end is located in the annular groove of the first annular part 51a. A telescopic block 53a is fixedly provided on the end of the C-shaped connecting rod. Correspondingly, a groove is provided on the inner wall of the inner box 7 to facilitate the sliding of the telescopic block 53a, and a limiting groove is provided to limit the telescopic block 53a.

[0054] The C-shaped connecting rod is provided with a slot for engaging with the lever 54. In use, when the lever 54 is inserted into the gap between the levers on the second annular part 51b, the lever 54 engages with the slot of the C-shaped connecting rod. In this way, when the lever 54 drives the first reset ring 51 to rotate, it drives the second reset ring 53 to rotate synchronously, thereby realizing the synchronous reset of the test tube positioning cylinder 2 and the transverse support rod 8.

[0055] The telescopic locking block 53a includes a first locking block, a second locking block, and a telescopic spring. A groove is formed on the bottom surface of the first locking block, and the telescopic spring is located in the groove. One end of the telescopic spring is fixedly connected to the top surface of the groove, and the other end is fixedly connected to the second locking block. One corner of the top surface of the first locking block is rounded so that the telescopic locking block 53a can be dislodged from the limiting groove and enter the annular groove of the first annular part 51a after retraction. Another corner of the top surface of the first locking block is provided with an arched slide for abutting against the corresponding first unlocking unit 55. Multiple rollers are rotatably arranged on the side of the second locking block away from the telescopic spring to reduce the friction between the telescopic locking block 53a and the bottom surface of the groove of the first annular part 51a.

[0056] Multiple paddles 53b are arranged circumferentially and fixedly disposed on the inner surface of the second reset ring 53. Each paddle 53b is used to push the corresponding transverse support rod 8 to the initial position. Specifically, each paddle 53b has a fan-shaped structure. Thus, when the lever 54 drives the second reset ring 53 to rotate, the inclined surface of each paddle 53b pushes the transverse support rod 8 towards the center of the inner box 7 until the transverse support rod 8 returns to the initial position, thereby resetting the transverse support rod 8.

[0057] Each telescopic block 53a is provided with a first unlocking unit 55. After centrifugation, each first unlocking unit 55 presses the corresponding telescopic block 53a downward, so that the height of the telescopic block 53a is reduced and the corresponding telescopic block 53a is removed from the limiting groove and enters the annular groove of the first annular part 51a, so that the subsequent lever 54 drives the first reset ring 51 to rotate.

[0058] Specifically, the first unlocking unit 55 includes a first hydraulic cylinder 55a, a first hydraulic rod 55b, a first hydraulic pipe 55c, and a first pressing rod 55d.

[0059] The first hydraulic cylinder 55a is embedded inside the corresponding inclined slide 1. The lower end of the first hydraulic cylinder 55a is slidably connected to the first hydraulic rod 55b. The lower end of the first hydraulic rod 55b is in contact with the corresponding test tube positioning cylinder 2. One end of the first hydraulic pipe 55c is fixedly connected to the upper end of the first hydraulic cylinder 55a and communicates with the interior of the first hydraulic cylinder 55b. The other end passes through the inner wall of the inner box 7 and is located above the arched slide of the corresponding telescopic block 53a. Among them, a third hydraulic cylinder is fixedly installed at the end of the first hydraulic pipe 55c away from the first hydraulic cylinder 55a. The third hydraulic cylinder is slidably connected to the first extrusion rod 55d, and the first hydraulic cylinder 55a, the first hydraulic pipe 55c and the third hydraulic cylinder are pre-filled with hydraulic oil.

[0060] In practical applications, in the initial state, the distance between the bottom end of the first hydraulic rod 55b and the top surface of the transverse support rod 8 is greater than the height of the test tube positioning cylinder 2. Thus, as the first reset ring 51 drives each test tube positioning cylinder 2 back to the top of the inclined slide 1 via the lifting rope 52, the test tube positioning cylinder 2 pushes the first hydraulic rod 55b upward, causing the first hydraulic rod 55b to retract into the first hydraulic cylinder 55a, and the hydraulic oil in the first hydraulic cylinder 55a is squeezed out. At this time, the first extrusion rod 55d extends until it contacts the arched slide, until the second locking block retracts into the first locking block. At the same time, the first extrusion rod 55d pushes the telescopic locking block 53a out of the limiting groove along the arc surface of the arched slide and causes the telescopic locking block 53a to enter the annular groove of the first annular part 51a, thereby releasing the second reset ring 53 so that the second reset ring 53 can rotate. Medical staff use lever 54 to rotate the second rotating ring 54 by a certain angle. At the same time, each horizontal support rod 8 returns to its initial position, and each test tube positioning cylinder 2 lifts its corresponding first hydraulic rod 55b into its corresponding first hydraulic cylinder 55a. After releasing the first reset ring 51, each test tube positioning cylinder 2 moves downward under its own gravity until it contacts the corresponding horizontal support rod 8, thus completing the reset of each test tube positioning cylinder 2.

[0061] Each second unlocking unit 56 is located below the corresponding inclined slide 1 and connected to the corresponding telescopic push plate 31; wherein, the interior of the T-shaped sliding rod 31a has an opening for connecting to the second unlocking unit 56, and the push plate 31a-1 is slidably connected inside the opening. In the initial state, the push plate 31a-1 extends out of the opening and is located on one side of the rotating plate 34.

[0062] Specifically, each second unlocking unit 56 includes a second pressing rod 56a, a second hydraulic cylinder 56b, a second hydraulic rod 56c, a second hydraulic pipe 56d, and a second return spring 56e; The second pressing rod 56a is vertically disposed on the bottom surface of the first reset ring 51 and located above the corresponding second mounting cylinder 31b; specifically, the second pressing rod 56a has an inverted T-shaped structure.

[0063] In the initial state, the second compression rod 56a abuts against the side of the first mounting cylinder in the corresponding transverse support rod 8 to prevent the first reset ring 51 from rotating during centrifugation. That is, the installation of the transverse support rod 8 is related to the rotation direction of the inner box 7. Specifically, before centrifugation, the installation of the transverse support rod 8 includes the following two situations: Scenario 1: When the rotary motor 6 drives the inner box 7 to rotate clockwise; The transverse support rod 8 is located behind the second pressing rod 56a. When the rotary motor 6 drives the inner box 7 to rotate clockwise, the transverse support rod 8 rotates in the same direction as the inner box 7. The transverse support rod 8 pushes the second pressing rod 56a to rotate in the same direction, preventing the second pressing rod 56a from rotating in the opposite direction due to inertia. In turn, the second pressing rod 56a drives the first reset ring 51 to rotate clockwise, maintaining the stability of the entire device during use. In this case, the end of the telescopic block 53a with rounded corners is located at the rear in the direction of rotation, that is, the end of the telescopic block 53a with rounded corners is located at its front end, and the other end of the telescopic block 53a is a right angle. In this way, during the centrifugation process, the end of the telescopic block 53a with rounded corners is located at the front end in the direction of rotation, and the other end abuts against the inner wall of the limiting groove due to inertia. Therefore, the telescopic block 53a will not come out of the limiting groove, that is, the second reset ring 53 will not move during the centrifugation process, thus maintaining the stability of the entire device during use. Scenario 2: When the rotary motor 6 drives the inner box 7 to rotate counterclockwise; The installation position of the transverse support rod 8 is opposite to that in Case 1 above. The transverse support rod 8 is located in front of the second pressing rod 56a. When the rotary motor 6 drives the inner box 7 to rotate counterclockwise, the transverse support rod 8 rotates in the same direction as the inner box 7. The transverse support rod 8 pushes the second pressing rod 56a to rotate in the same direction, preventing the second pressing rod 56a from rotating in the opposite direction due to inertia. In turn, the second pressing rod 56a drives the first reset ring 51 to rotate counterclockwise, maintaining the stability of the overall device during use. In this case, the rounded corner position on the telescopic block 53a is opposite to that in case one. That is, the rounded corner on the telescopic block 53a in this case is located at its rear end. In this way, during centrifugation, one end of the telescopic block 53a with the rounded corner is located at the front end in the direction of rotation, and the other end abuts against the inner wall of the limiting groove due to inertia. Therefore, the telescopic block 53a will not come out of the limiting groove, that is, the second reset ring 53 will not move, thus maintaining the stability of the entire device during use.

[0064] The embodiments of the present invention are illustrated using case two as an example.

[0065] The second hydraulic cylinder 56b is fixedly mounted on the second mounting cylinder 31b, and the second hydraulic rod 56c is slidably mounted on the upper end of the second hydraulic cylinder 56b, with the end of the second hydraulic rod 56c away from the second hydraulic cylinder 56b in contact with the second extrusion rod 56a.

[0066] One end of the second hydraulic pipe 56d is connected to the bottom surface of the second hydraulic cylinder 56b, and the other end is connected to the internal cavity of the T-shaped sliding rod 31a; wherein, the top surface of the opening of the T-shaped sliding rod 31a and the top surface of the push plate, as well as the inside of the second hydraulic pipe 56d, are pre-filled with hydraulic oil.

[0067] To facilitate the reset of the second hydraulic rod 56c, a second reset spring 56e is vertically installed between the second hydraulic rod 56c and the second hydraulic pipe 56d; specifically, one end of the second reset spring 56e is fixedly connected to the second hydraulic rod 56c, and the other end is fixedly connected to the second hydraulic pipe 56d.

[0068] In the initial state and during centrifugation, the second extrusion rod 56a is located directly above the second hydraulic rod 56c and abuts against the second hydraulic rod 56c. At this time, the second return spring 56e is in a compressed state. After the centrifugation operation is completed, the lever 54 drives the first reset ring 51 to rotate, and the second compression rod 56a rotates synchronously. At this time, the second hydraulic rod 56c is no longer compressed, and the second reset spring 56e returns to its natural state, thereby driving the second hydraulic rod 56c to move upward. During the upward movement of the second hydraulic rod 56c, the hydraulic oil in the opening of the T-shaped sliding rod 31a is drawn into the second hydraulic pipe 56d, thereby causing the push plate 31a-1 to move into the opening of the T-shaped sliding rod 31a until the push plate 31a-1 no longer abuts against the rotating plate 43. The first reset spring 36 returns to its natural state, and then the rotating plate 43 returns to its initial state under the action of the first reset spring 36. At this time, the transverse connecting rod 35 retracts, thereby driving the locking plate 32 to move downward until the locking plate 32 returns to its initial state. The locking plate 32 moves downward, thereby separating from the test tube positioning cylinder 2. Then, the test tube positioning cylinder 2 is pulled upward under the action of the lifting rope 52 until it returns to its initial position, realizing the reset of the test tube positioning cylinder 2.

[0069] Application Cases Taking conventional plasma separation as an example, the device provided by the present invention includes the following steps during use: S1: Blood is drawn using an anticoagulant tube; S2: Let stand; S3: Centrifugation; specifically, this step includes the following steps: S301: Medical staff place the anticoagulant tube into test tube positioning tube 2; S302: Start rotary motor 6; Specifically, the rotary motor 6 drives the inner box 7 to rotate counterclockwise from a low speed to a high speed. During the process of the inner box 7 rotating counterclockwise from a low speed to a high speed, each horizontal support rod 8 moves into the corresponding first mounting cylinder under centrifugal force. At this time, the test tube positioning cylinder 2 loses the support of the L-shaped support rod and slides down to the bottom of the inclined slide 1 under its own gravity and contacts the T-shaped sliding rod 31a. Then, the test tube positioning cylinder 2 pushes the T-shaped sliding rod 31a into the second mounting cylinder 31b. During the movement of the T-shaped sliding rod 31a, the lower end of the T-shaped sliding rod 31a abuts against the upper end of the rotating plate 34 and pushes the upper end of the rotating plate 34 in the same direction, causing the lower end of the rotating plate 34 to tilt upward. The lower end of the rotating plate 34 drives the transverse connecting rod 35 to move in the same direction, that is, the transverse connecting rod 35 moves towards the end closer to the locking plate 32. Since the transverse connecting rod 35 is slidably connected to the groove on the chamfered inclined surface of the locking plate 32, the locking plate 32 moves upward under the pushing force of the transverse connecting rod 35 until the second locking tooth 32a engages with the first locking tooth 21, thereby fixing the position of the test tube positioning cylinder 2. In the above steps, the first reset ring 51 and the second reset ring 53 remain stable under the action of the transverse support rod 8 and the limiting groove, respectively, and will not shake in the inner box 7. S4: After centrifugation, reset each test tube positioning cylinder 2 and each horizontal support rod 8; specifically, this step includes the following steps: S401: Medical staff insert lever 54 into the gap between the levers and engage it with the slot on the C-shaped connecting rod in the second reset ring 53; S402: Medical staff use lever 54 to rotate the first reset ring 51 and the second reset ring 53 counterclockwise; During this process, the test tube positioning cylinder 2 pushes the first hydraulic rod 55b upward, causing the first hydraulic rod 55b to retract into the first hydraulic cylinder 55a, and the hydraulic oil in the first hydraulic cylinder 55a is squeezed out. At this time, the first extrusion rod 55d extends until it contacts the arched slide, until the second locking block retracts into the first locking block. At the same time, the first extrusion rod 55d pushes the telescopic locking block 53a out of the limiting groove along the arc surface of the arched slide and causes the telescopic locking block 53a to enter the annular groove of the first annular part 51a, thereby releasing the second reset ring 53 so that the second reset ring 53 can rotate. At the same time, the inclined surfaces of each paddle 53b on the second reset ring 53 push the transverse support rod 8 toward the center of the inner box 7 until the transverse support rod 8 returns to its initial position, thus resetting the transverse support rod 8. As each horizontal support rod 8 returns to its initial position, each test tube positioning cylinder 2 lifts its corresponding first hydraulic rod 55b into its corresponding first hydraulic cylinder 55a. After releasing the first reset ring 51, each test tube positioning cylinder 2 moves downward under its own gravity until it contacts the corresponding horizontal support rod 8, thus completing the reset of each test tube positioning cylinder 2. S403: Remove the anticoagulant tube after centrifugation; S5: Use a pipette to aspirate only the upper layer of pale yellow liquid; S6: Transfer the upper pale yellow liquid to a clean 1.5mL EP tube to complete the dispensing and storage. At this point, the routine plasma separation operation is complete.

[0070] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A blood centrifuge separation device, comprising an outer casing (4), characterized in that, Also includes: The inner box (7) is rotatably disposed inside the outer box (4); Multiple inclined slides (1) are arranged in a circular pattern inside the inner box (7); Multiple test tube positioning cylinders (2) are respectively set on the corresponding inclined slides (1); Multiple self-locking mechanisms (3) are located at the bottom of the corresponding inclined slide (1) and are in contact with the corresponding test tube positioning cylinder (2).

2. The blood centrifugation device according to claim 1, characterized in that, The self-locking mechanism (3) includes: The telescopic push plate (31) is located inside the corresponding inclined slide (1), with one end in contact with the bottom surface of the corresponding test tube positioning cylinder (2) and the other end connected to the inner wall of the inner box (7). The locking plate (32) is located on one side of the telescopic push plate (31) and is engaged with the side of the test tube positioning cylinder (2); The lifting assembly is located on the bottom surface inside the inner box (7) and is connected to the inclined slide (1), the telescopic push plate (31) and the locking plate (32) respectively.

3. The blood centrifugation device according to claim 2, characterized in that, The lifting assembly includes: The T-shaped base (33) is connected to the bottom surface of the inclined slide (1), and one end of the T-shaped base (33) is perpendicular to and slidably connected to the locking plate (32); The rotating plate (34) is rotatably connected to the other end of the T-shaped base (33) at its center position. The upper end of the rotating plate (34) is in contact with the telescopic push plate (31), and the lower end is rotatably provided with a transverse connecting rod (35). The end of the transverse connecting rod (35) away from the rotating plate (34) passes through the T-shaped base (33) and is slidably connected to the locking plate (32).

4. The blood centrifugation device according to claim 3, characterized in that, The inner box (7) is also provided with multiple horizontal support rods (8). One end of each horizontal support rod (8) is located below the corresponding test tube positioning cylinder (2), and the other end is connected to the inner wall of the inner box (7).

5. A blood centrifuge separation device according to claim 4, characterized in that, The inner box (7) is also equipped with a reset mechanism (5), which includes: The outer side of the first reset ring (51) is slidably connected to the inside of the inner box (7); Multiple lifting ropes (52), one end of each lifting rope (52) is connected to the first reset ring (51), and the other end is connected to the corresponding test tube positioning cylinder (2). Each lifting rope (52) is used to reset the corresponding test tube positioning cylinder (2). The second reset ring (53) is located inside the first reset ring (51) and is slidably connected to the first reset ring (51). The second reset ring (53) is used to reset each of the transverse support rods (8). The lever (54) is detachably connected to the first reset ring (51) and the second reset ring (53), respectively.

6. A blood centrifuge separation device according to claim 5, characterized in that, The second reset ring (53) is provided with multiple telescopic blocks (53a) for sliding connection with the first reset ring (51), and each telescopic block (53a) is engaged with the inner wall of the inner box (7); multiple paddles (53b) are arranged circumferentially on the inner side of the second reset ring (53), and each paddle (53b) contacts the corresponding transverse support rod (8).

7. A blood centrifuge separation device according to claim 6, characterized in that, The reset mechanism (5) also includes multiple first unlocking units (55), one end of each first unlocking unit (55) is connected to the corresponding inclined slide (1), and the other end passes through the inner wall of the inner box (7) and abuts against the upper end of the corresponding telescopic block (53a).

8. A blood centrifuge separation device according to claim 7, characterized in that, Each first unlocking unit (55) includes: The first hydraulic cylinder (55a) is embedded inside the top of the corresponding inclined slide (1); The upper end of the first hydraulic rod (55b) is connected to the lower end of the first hydraulic cylinder (55a), and the lower end is in contact with the corresponding test tube positioning cylinder (2); The first hydraulic pipe (55c) is connected at one end to the upper end of the first hydraulic cylinder (55a), and the other end passes through the inner wall of the inner box (7) and is located above the corresponding telescopic block (53a). The first extrusion rod (55d) is fixedly connected to the end of the first hydraulic pipe (55c) away from the first hydraulic cylinder (55a).

9. A blood centrifuge separation device according to claim 8, characterized in that, Each telescopic block (53a) has a square structure with rounded corners at one end and an arched slide that contacts the first compression rod (55d) at the other end.

10. A blood centrifuge separation device according to claim 5, characterized in that, The reset mechanism (5) also includes a plurality of second unlocking units (56), each second unlocking unit (56) including: The second extrusion rod (56a) is vertically disposed on the bottom surface of the first reset ring (51) and located above the corresponding telescopic push plate (31); The second hydraulic cylinder (56b) is disposed on the upper surface of the telescopic push plate (31), and the upper end of the second hydraulic cylinder (56b) is provided with a second hydraulic rod (56c), which is in contact with the second extrusion rod (56b). The second hydraulic pipe (56d) is connected at one end to the bottom surface of the second hydraulic cylinder (56b) and at the other end to the interior of the telescopic push plate (31) and connected to the push plate (31a-1) in the telescopic push plate (31).

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